<PAGE>
 
      
   AS FILED WITH THE SECURITIES AND EXCHANGE COMMISSION ON MAY 8, 1997     
                                                     REGISTRATION NO. 333-10729
-------------------------------------------------------------------------------
-------------------------------------------------------------------------------
 
                      SECURITIES AND EXCHANGE COMMISSION
                            WASHINGTON, D.C. 20549
 
                               ----------------
                                
                             AMENDMENT NO. 6     
                                      TO
                                   FORM S-4
                            REGISTRATION STATEMENT
                                     UNDER
                          THE SECURITIES ACT OF 1933
 
                               ----------------
                             
                          SHERIDAN ENERGY, INC.     
            (EXACT NAME OF REGISTRANT AS SPECIFIED IN ITS CHARTER)
 
                               ----------------
 
         DELAWARE                    1330                    76-0507664
      (STATE OR OTHER    (PRIMARY STANDARD INDUSTRIAL     (I.R.S. EMPLOYER
      JURISDICTION OF      CLASSIFICATION CODE NO.)      IDENTIFICATION NO.)
     INCORPORATION OR
       ORGANIZATION)
 
                222 PENNBRIGHT, SUITE 200, HOUSTON, TEXAS 77090
                                (281) 872-0500
  (ADDRESS, INCLUDING ZIP CODE, AND TELEPHONE NUMBER, INCLUDING AREA CODE, OF
                   REGISTRANT'S PRINCIPAL EXECUTIVE OFFICES)
 
                               ----------------
 
                              JEFFREY E. SUSSKIND
                             CHAIRMAN OF THE BOARD
                           222 PENNBRIGHT, SUITE 200
                             HOUSTON, TEXAS 77090
                                (281) 872-0500
 (NAME, ADDRESS INCLUDING ZIP CODE, AND TELEPHONE NUMBER, INCLUDING AREA CODE,
                             OF AGENT FOR SERVICE)
 
                               ----------------
 
                                  COPIES TO:
                            ARTHUR S. BERNER, ESQ.
                        WINSTEAD SECHREST & MINICK P.C.
                            910 TRAVIS, SUITE 1700
                             HOUSTON, TEXAS 77002
                                (713) 650-2729
 
  Approximate date of commencement of proposed sale to the public: AS SOON AS
PRACTICABLE AFTER THE REGISTRATION STATEMENT BECOMES EFFECTIVE AND ALL OTHER
CONDITIONS PURSUANT TO THE MERGER AGREEMENT DESCRIBED IN THE ENCLOSED PROXY
STATEMENT/PROSPECTUS HAVE BEEN SATISFIED OR WAIVED.
 
  If the securities being registered on this Form are to be offered in
connection with the formation of a holding company and there is compliance
with General Instruction G, check the following box. [_]
 
                               ----------------
 
  THE REGISTRANT HEREBY AMENDS THIS REGISTRATION STATEMENT ON SUCH DATE OR
DATES AS MAY BE NECESSARY TO DELAY ITS EFFECTIVE DATE UNTIL THE REGISTRANT
SHALL FILE A FURTHER AMENDMENT WHICH SPECIFICALLY STATES THAT THIS
REGISTRATION STATEMENT SHALL THEREAFTER BECOME EFFECTIVE IN ACCORDANCE WITH
SECTION 8(A) OF THE SECURITIES ACT OF 1933 OR UNTIL THE REGISTRATION STATEMENT
SHALL BECOME EFFECTIVE ON SUCH DATE AS THE COMMISSION, ACTING PURSUANT TO SAID
SECTION 8(A), MAY DETERMINE.
 
-------------------------------------------------------------------------------
-------------------------------------------------------------------------------
<PAGE>
 
 PRELIMINARY PROXY--FOR INFORMATION OF THE SECURITIES AND EXCHANGE COMMISSION
                                     ONLY
 
                                TGX CORPORATION
                           222 PENNBRIGHT, SUITE 200
                             HOUSTON, TEXAS 77090
 
                                 May 14, 1997
 
TO THE STOCKHOLDERS OF TGX CORPORATION:
 
  Accompanying this letter is a Proxy Statement/Prospectus which explains in
detail the matters to be considered at a special meeting of the stockholders
(the "Meeting") of TGX Corporation to be held on June 12, 1997.
 
  As you may recall, in January 1992, TGX Corporation ("TGX" or the "Company")
had its Amended Plan of Reorganization (the "Plan") confirmed by the Federal
Bankruptcy Court sitting in Shreveport, Louisiana. Pursuant to the Plan,
creditors of TGX received shares of the Company's Series A Senior Preferred
Stock (the "Senior Preferred Stock") entitling them to receive cumulative
dividends at a rate of 10% per year of its liquidation preference of $10.00
per share. The Senior Preferred Stock is redeemable on or before January 21,
2002 in an amount equal to its liquidation preference plus accrued but unpaid
dividends. Redemption of the 8,678,571 shares of Senior Preferred Stock
currently issued and outstanding would require an aggregate payment of
$86,786,000, plus an additional payment of approximately $56,473,000 for
unpaid dividends as of this date.
 
  The Plan provided that the holders of the common stock would retain their
shares primarily to preserve their interest in a potential recovery from
continuing litigation (the "NFG Litigation") by the Company against National
Fuel Gas Distribution Company ("NFG"). The NFG Litigation has been settled,
and the Company, after payments to other non-affiliated parties entitled to
share in the settlement, retained approximately $3.5 million from such
settlement. The proceeds are, therefore, clearly insufficient to redeem the
Senior Preferred Stock, much less to provide further value to the Company's
common stockholders.
   
  At the Meeting, stockholders of the Company will be asked to consider and
vote upon a proposed merger (the "Merger") with a newly formed subsidiary of
the Company, Sheridan Energy, Inc. ("Sheridan"), whereby the Senior Preferred
Stock will be exchanged for shares of common stock of Sheridan, and the
currently outstanding common stock and other preferred stock of the Company
would be eliminated. The transaction was structured in this manner in order to
reflect the fact that only holders of Senior Preferred Stock have any existing
economic interest in the on-going business of TGX, and to permit Sheridan to
better access the capital markets without the significant hindrance of a large
accumulating dividend and an obligation to redeem the TGX Senior Preferred
Stock in the foreseeable future.     
 
  It is the belief of the Board of Directors, that the proposals set forth in
the attached Proxy Statement/Prospectus present the best opportunity to
improve the Company's financial affairs and to position the Company for the
challenging environment in which it now operates. Of course, the Board of
Directors can give no assurances we will be successful in that endeavor.
   
  PLEASE NOTE, that as a result of the transactions described in the
accompanying Proxy Statement/Prospectus, current holders of TGX Common Stock
and classes of TGX Preferred Stock, other than Senior Preferred Stock, will
receive no shares of Sheridan nor any other consideration for their TGX
securities and will not receive any value.     
   
  Upon approval of the Agreement of Merger, the Merger will be consummated
promptly. These actions will significantly improve the Company's current
capital and liquidity positions and provide the Company with greater operating
flexibility in the future. Sheridan has applied to have the Sheridan Common
Stock listed on the Nasdaq-Small Cap System, but, to date, Sheridan's
application has not been acted upon and there can be no assurances that
Sheridan's Common Stock will be listed on the Nasdaq-Small Cap System.     
<PAGE>
 
  The Board of Directors has obtained an opinion of American Appraisal
Associates, Inc. stating that the Merger is fair to the Company's stockholders
from a financial point of view. Based on the receipt of such opinion, as well
as the Board of Directors' own independent analysis of the Company's financial
position, the Board of Directors has unanimously approved the Agreement of
Merger and the Merger. The Board of Directors recommends that you vote FOR
such proposal. However, in view of their holdings of Senior Preferred Stock,
the TGX Board of Directors might be deemed to have a conflict of interest with
respect to the transactions described in the accompanying Proxy
Statement/Prospectus.
 
  If the Merger is not approved, stockholders will be asked at the Meeting to
elect Jonathan P. Carroll, Michael A. Gerlich, Jeffrey E. Susskind and David
H. Scheiber (the "Nominees") to the Board of Directors of the Company.
   
  If the Merger is approved, immediately after the Merger is effective, the
stockholders of Sheridan (previously the holders of TGX's Senior Preferred
Stock) will meet to elect the Nominees as directors of Sheridan. Sheridan
stockholders will also be asked to approve Sheridan's 1997 Flexible Incentive
Plan. The proposal relating to the Flexible Incentive Plan is conditional upon
approval of the Merger and will not be implemented if the Merger is not
approved by TGX's stockholders.     
   
  The Board recommends that you vote FOR each Nominee and FOR the proposal to
adopt the Sheridan 1997 Flexible Incentive Plan.     
 
  Each stockholder of the Company (whether owning preferred stock or common
stock) on May 9, 1997 is entitled to receive notice of and to vote at the
Meeting and is invited to attend the Meeting. Whether or not you intend to be
present at the Meeting, your vote is very important and we urge you to review
the Proxy Statement/Prospectus carefully and to complete, date, sign and
promptly return the enclosed Proxy Card. Your Board of Directors recommends
you vote "FOR" the adoption and approval of the Merger Agreement and the
Merger.
 
  I and the rest of your Board of Directors look forward to seeing you at the
Meeting.
 
                                          Very truly yours, on behalf of the
                                           Board of Directors,
 
                                          Jeffrey E. Susskind
                                          Chairman of the Board
 
        PLEASE COMPLETE, SIGN, DATE AND RETURN THE ENCLOSED PROXY CARD.
<PAGE>
 
 PRELIMINARY PROXY--FOR INFORMATION OF THE SECURITIES AND EXCHANGE COMMISSION
                                     ONLY
                                                                           
           TGX CORPORATION                 SHERIDAN ENERGY, INC.           
      222 PENNBRIGHT, SUITE 200             222 PENNBRIGHT, SUITE 200      
        HOUSTON, TEXAS 77090                  HOUSTON, TEXAS 77090         
 
 
         ---------------------                  ------------------
 
 
 
                  NOTICE OF SPECIAL MEETINGS OF STOCKHOLDERS
                           TO BE HELD JUNE 12, 1997
 
TO THE STOCKHOLDERS OF TGX CORPORATION:
 
  Notice is hereby given that a special meeting of the stockholders (the
"Meeting") of TGX Corporation, a Delaware corporation ("TGX"), will be held at
the Four Seasons Hotel, 1300 Lamar Street, Houston, Texas on June 12, 1997 at
10:00 a.m. local time, for the following purposes:
     
  1. To consider and act upon the proposed merger (the "Merger") of TGX with
     and into Sheridan Energy, Inc. ("Sheridan"), a Delaware corporation and
     currently a wholly-owned subsidiary of TGX;     
 
  2. To elect Jonathan P. Carroll, Michael A. Gerlich, David H. Scheiber and
     Jeffrey E. Susskind to the board of directors of TGX;
 
  3. To transact such other business as may properly come before the meeting
     or any adjournment thereof.
   
  If the Merger is approved, immediately after the Merger is effected, the
stockholders of Sheridan will hold a special meeting (the "Sheridan Special
Meeting") at the same location for the following purposes:     
     
  (a) To elect Jonathan P. Carroll, Michael A. Gerlich, David H. Scheiber and
      Jeffrey E. Susskind to the board of directors of Sheridan;     
     
  (b) To consider and act upon a proposal to approve the Sheridan 1997
      Flexible Incentive Plan authorizing the possible issuance of 450,000
      shares of common stock of Sheridan to certain parties; and     
 
  (c) To transact such other business as may properly come before the meeting
      or any adjournment thereof.
   
  The Sheridan Special Meeting and Proposals (a), (b), (c) and (d) are
conditioned upon approval by the TGX stockholders of Proposal 1 and will not
be implemented if Proposal 1 is not approved by TGX's stockholders.     
   
  The stock transfer books will not be closed. Stockholders of record as of
the close of business on May 9, 1997 are entitled to notice of, and to vote
at, the Meeting and the Sheridan Special Meeting or any adjournment thereof,
notwithstanding any transfer of stock on the books of TGX after such record
date.     
 
  You are cordially invited to attend the meeting in person. YOU ARE URGED TO
COMPLETE, DATE, AND SIGN THE ENCLOSED PROXY AND TO RETURN IT PROMPTLY IN THE
ENCLOSED ENVELOPE, WHETHER OR NOT YOU PLAN TO ATTEND THE MEETING.
 
                                          By Order of the Board of Directors
 
                                          Jeffrey E. Susskind
                                          Chairman of the Board
Houston, Texas
May 14, 1997
<PAGE>
 
 PRELIMINARY PROXY--FOR INFORMATION OF THE SECURITIES AND EXCHANGE COMMISSION
                                     ONLY

                                                                          
            TGX CORPORATION                    SHERIDAN ENERGY, INC.       
       222 PENNBRIGHT, SUITE 200                222 PENNBRIGHT, SUITE 200  
         HOUSTON, TEXAS 77090                     HOUSTON, TEXAS 77090     
                                                                           
 
 
 
            ---------------                          ----------------
            PROXY STATEMENT                    PROXY STATEMENT/PROSPECTUS
            ---------------                          ---------------- 
 
 
 
    SPECIAL MEETING OF STOCKHOLDERS         RELATING TO A SPECIAL MEETING OF
             JUNE 12, 1997                  STOCKHOLDERS AND THE ISSUANCE OF
                                                    4,339,285 SHARES
                                                 
                                              OF SHERIDAN COMMON STOCK     
 
  This Proxy Statement and Prospectus (the "Proxy Statement/Prospectus") is
being furnished to the stockholders of TGX Corporation, a Delaware corporation
("TGX" or the "Company"), in connection with the solicitation of proxies by
the board of directors of TGX (the "Board") for use at a special meeting of
stockholders (the "Meeting") of TGX to be held on June 12, 1997 at 10:00 a.m.,
local time, at the Four Seasons Hotel, 1300 Lamar Street, Houston, Texas, or
at any adjournment thereof.
 
  This Proxy Statement/Prospectus and proxy and the accompanying Notice of
Special Meeting is first being mailed to stockholders on or about May 14,
1997. The cost of soliciting proxies will be borne by TGX. The Board has fixed
May 9, 1997, as the record date (the "Record Date") for determination of
stockholders entitled to receive notice of and to vote at the Meeting. On the
Record Date, there were (i) 8,678,571 shares of the Company's Series A
Preferred Stock, par value $1.00 per share ("Senior Preferred Stock"),
outstanding and entitled to vote; (ii) 491,657 shares of the Company's
Cumulative Convertible Preferred Stock, par value $1.00 per share ("Old
Preferred Stock"), outstanding and entitled to vote; and (iii) 24,955,807
shares of the Company's Common Stock, par value $.01 per share ("Common
Stock"), outstanding and entitled to vote. Pursuant to the Company's
Certificate of Incorporation and By-laws, the holders of Senior Preferred
Stock, in the aggregate, have 95% of the voting power of all classes of TGX
equity securities. Thus, each holder of Senior Preferred Stock will be
entitled to 55.7121 votes for each share owned, and each holder of Old
Preferred Stock and Common Stock will be entitled to one vote for each share
owned. Holders of the Senior Preferred Stock, Old Preferred Stock and Common
Stock are entitled to vote as one class on the proposed Merger and the
election of the TGX directors. Officers and directors of TGX own 1,818,002
shares of Senior Preferred Stock, giving them, in the aggregate, 19.9% of the
aggregate voting power of all classes entitled to vote on the proposals set
forth herein.
   
  At the Meeting, holders of the outstanding shares of Senior Preferred Stock,
Old Preferred Stock and Common Stock of TGX are being asked to consider and
adopt the Agreement of Merger (the "Merger Agreement") between TGX and
Sheridan Energy, Inc. ("Sheridan"), a newly-formed Delaware corporation and
currently a wholly-owned subsidiary of TGX, pursuant to which TGX will merge
(the "Merger") with and into Sheridan, and to elect the directors of TGX. A
copy of the Merger Agreement is attached as Appendix "A" hereto. Upon
consummation of the Merger, each outstanding share of Senior Preferred Stock
will be automatically converted into one-half share of common stock, par value
$.01 per share (the "New Common Stock" or the "Sheridan Common Stock"), of
Sheridan, and each outstanding share of Common Stock and Old Preferred Stock
will automatically be cancelled. If the Merger is approved, Mr. Susskind will
own 20.5% of the Sheridan Common Stock, all officers and directors of the
Company, as a group, will own 21.0% of the Sheridan Common Stock and, to the
current knowledge of Sheridan, the only other 5% holders of the Sheridan
Common Stock would be The AIF-Lion Group and Gaylon E. and Gloria A. T.
Simmons who would own 21.0%     
 
                                       1
<PAGE>
 
   
and 6.6% respectively. PLEASE NOTE, that as a result of the transactions
described in this Proxy Statement/Prospectus, current holders of TGX Common
Stock and Old Preferred Stock will receive no shares of Sheridan nor any other
consideration for their TGX securities. Therefore, in view of their holdings
of Senior Preferred Stock, the TGX Board of Directors might be deemed to have
a conflict of interest with respect to the transactions described in the
accompanying Proxy Statement/Prospectus.     
   
  If the Merger is approved, immediately after the Merger is effected, at the
Sheridan Special Meeting holders of New Common Stock will vote upon the
election of directors of Sheridan and to consider and approve the Sheridan
1997 Flexible Incentive Plan. Only holders of New Common Stock (the former
holders of TGX Senior Preferred Stock) will be entitled to vote for the
Sheridan Board and the Sheridan 1997 Flexible Incentive Plan.     
   
  The Merger is intended to be a tax free reorganization. See "The Merger--
Certain Federal Income Tax Considerations" below. The full text of the Merger
Agreement, the Certificate of Incorporation of Sheridan (the "Sheridan
Certificate") and the Bylaws of Sheridan (the "Sheridan Bylaws") are set forth
in Appendices "A", "B", and "C" hereto, respectively. This Proxy
Statement/Prospectus constitutes a proxy statement for the Meeting and for the
Sheridan Special Meeting and also constitutes a prospectus of Sheridan with
respect to the shares of New Common Stock to be issued in the Merger.     
   
  THE SHARES OF SHERIDAN COMMON STOCK TO BE OFFERED PURSUANT TO THIS PROXY
STATEMENT/PROSPECTUS HAVE NOT BEEN APPROVED OR DISAPPROVED BY THE SECURITIES
AND EXCHANGE COMMISSION OR ANY STATE SECURITIES COMMISSION NOR HAS THE
SECURITIES AND EXCHANGE COMMISSION OR ANY STATE SECURITIES COMMISSION PASSED
UPON THE ACCURACY OR ADEQUACY OF THIS PROXY STATEMENT/PROSPECTUS. ANY
REPRESENTATION TO THE CONTRARY IS A CRIMINAL OFFENSE.     
 
  REFERENCE IS MADE TO "SPECIAL FACTORS" BEGINNING ON PAGE 13 HEREOF FOR A
MORE COMPLETE DESCRIPTION OF THE REASONS FOR THE MERGER AND OTHER INFORMATION
CONCERNING THE MERGER.
   
  FOR A DISCUSSION OF CERTAIN RISKS ASSOCIATED WITH AN INVESTMENT IN THE
SHERIDAN COMMON STOCK, SEE "RISK FACTORS" BEGINNING ON PAGE 19.     
 
                               ----------------
 
  NO PERSON HAS BEEN AUTHORIZED TO GIVE ANY INFORMATION OR TO MAKE ANY
REPRESENTATION NOT CONTAINED IN THIS PROXY STATEMENT/PROSPECTUS IN CONNECTION
WITH THE OFFERING AND SOLICITATION MADE HEREBY, AND, IF GIVEN OR MADE, SUCH
INFORMATION OR REPRESENTATION SHOULD NOT BE RELIED UPON AS HAVING BEEN
AUTHORIZED. THIS PROXY STATEMENT/PROSPECTUS DOES NOT CONSTITUTE AN OFFER TO
SELL, OR A SOLICITATION OF AN OFFER TO PURCHASE, THE SECURITIES OFFERED BY
THIS PROXY STATEMENT/PROSPECTUS, OR THE SOLICITATION OF A PROXY, IN ANY
JURISDICTION OR FROM ANY PERSON TO WHOM IT IS UNLAWFUL TO MAKE SUCH OFFER OR
SOLICITATION. NEITHER THE DELIVERY OF THIS PROXY STATEMENT/PROSPECTUS NOR ANY
DISTRIBUTION OF THE SECURITIES OFFERED PURSUANT TO THIS PROXY
STATEMENT/PROSPECTUS SHALL, UNDER ANY CIRCUMSTANCES, CREATE ANY IMPLICATION
THAT THERE HAS BEEN NO CHANGE IN THE INFORMATION CONTAINED HEREIN SINCE THE
DATE HEREOF.
 
                               ----------------
          
       THE DATE OF THIS PROXY STATEMENT/PROSPECTUS IS MAY 12, 1997.     
 
                               ----------------
 
                                       2
<PAGE>
 
 
                             AVAILABLE INFORMATION
   
  This Proxy Statement/Prospectus constitutes a part of a Registration
Statement on Form S-4 filed by Sheridan with the Securities and Exchange
Commission (the "SEC") under the Securities Act of 1933, as amended (the
"Securities Act"), with respect to the common stock to be issued as described
herein. This Proxy Statement/Prospectus does not contain all of the
information contained in the Registration Statement, and the exhibits and
schedules thereto. For further information with respect to Sheridan and the
common stock of Sheridan, reference is made to the Registration Statement,
including the exhibits and schedules thereto, which may be inspected at the
SEC's offices without charge or copies of which may be obtained from the SEC
upon payment of prescribed fees. Statements contained in this Proxy
Statement/Prospectus as to the contents of any document filed as an exhibit to
the Registration Statement are not necessarily complete, but such statements
concerning the provisions of certain documents accurately describe the
material aspects of such documents. In each instance reference is hereby made
to the copy of such document filed as an exhibit to the Registration Statement
for the complete version of each of such documents.     
 
  The Company is subject to the informational requirements of the Securities
Exchange Act of 1934, as amended (the "Exchange Act"). In accordance with the
Exchange Act, the Company files periodic reports and other information with
the SEC. Such periodic reports and other information filed by the Company with
the SEC may be inspected and copied at the Public Reference Section of the SEC
at Room 1024, Judiciary Plaza, 450 Fifth Street, N.W., Washington, D.C. 20549,
and the Regional Offices of the SEC at Seven World Trade Center, 13th Floor,
New York, New York 10048 and Citicorp Center, 500 West Madison Street, Suite
1400, Chicago, Illinois 60661-2511. Copies of such materials may also be
obtained from the Public Reference Section of the SEC, at Room 1024, Judiciary
Plaza, 450 Fifth Street, N.W., Washington, D.C. 20549, at prescribed rates.
The SEC also maintains a World Wide Web site that contains reports, proxy
statements, and other information regarding companies (including TGX) that
file electronically (http://www.sec.gov).
 
                               ----------------
 
                                       3
<PAGE>
 
                               TABLE OF CONTENTS
<TABLE>
<CAPTION>
                                                                           PAGE
                                                                           ----
<S>                                                                        <C>
AVAILABLE INFORMATION.....................................................   3
SUMMARY...................................................................   7
  Date, Time and Place of Meetings........................................   7
  Record Date.............................................................   7
  Matters to be Considered at Meeting.....................................   7
  Risk Factors............................................................   8
  Vote Required...........................................................   8
  Recommendation of Board.................................................   9
  Conflict of Interest....................................................   9
  Market for TGX Stock....................................................   9
  The Companies...........................................................   9
  Reasons for Merger......................................................  10
  Opinion of Appraisal and Valuation Firm.................................  10
  Limitations on Opinion of Appraisal and Valuation Firm..................  10
  Appraisal Rights........................................................  10
  Tax Considerations......................................................  11
  Surrender of Certificates...............................................  11
  Pro-Forma Information...................................................  11
  Summary Financial Data..................................................  12
SPECIAL FACTORS...........................................................  13
  Purposes of Merger......................................................  13
  Alternatives Considered.................................................  13
  Reasons for Structure and Timing of Transaction.........................  13
  Effects of Transaction..................................................  14
  Fairness of Transaction.................................................  15
  Opinion of Appraisal and Valuation Firm.................................  16
RISK FACTORS..............................................................  19
  Executive Officer Vacancies.............................................  19
  Volatility of Oil, Gas and Natural Gas Liquid Prices....................  19
  Estimates of Oil and Gas Reserves.......................................  19
  Acquisition and Development of Reserves.................................  20
  Future Capital Needs....................................................  20
  Operating Hazards and Uninsured Risks...................................  20
  Competition and Marketing...............................................  20
  Environmental and Other Regulation......................................  21
  Forward-Looking Statements..............................................  21
  Principal Stockholders..................................................  22
  Financial Reorganization................................................  22
  Absence of Public Market................................................  22
  No Anticipated Dividends................................................  22
  Preferred Stock.........................................................  23
THE MEETINGS..............................................................  24
  Solicitation, Voting and Revocability of Proxies; Date and Place of
   Meetings...............................................................  24
  Purposes of Meeting.....................................................  24
  Record Date; Stockholders Entitled to Vote..............................  25
  Quorum; Vote Required...................................................  26
PROPOSAL 1--THE MERGER....................................................  26
  The Merger Agreement....................................................  26
  Background and Reasons for the Merger...................................  27
</TABLE>
 
                                       4
<PAGE>
 
                               TABLE OF CONTENTS
                                  (Continued)
 
<TABLE>   
<CAPTION>
                                                                            PAGE
                                                                            ----
<S>                                                                         <C>
  Recommendation of Board.................................................   29
  Opinion of Appraisal and Valuation Firm.................................   29
  Conditions to Merger....................................................   32
  Exchange of Certificates................................................   32
  Interests of Certain Persons in the Merger..............................   33
  Certain Federal Income Tax Considerations...............................   33
  Accounting Treatment....................................................   34
  Appraisal Rights........................................................   34
DESCRIPTION OF SHERIDAN SECURITIES........................................   35
  Common Stock............................................................   35
  Preferred Stock.........................................................   36
COMPARATIVE RIGHTS OF STOCKHOLDERS........................................   36
  General.................................................................   36
  Dividends...............................................................   37
  Voting Rights...........................................................   37
  Amendment...............................................................   37
  Redemption/Conversion...................................................   37
  Liquidation.............................................................   37
  Unissued Shares.........................................................   38
BUSINESS AND PROPERTIES OF THE COMPANY....................................   39
  General.................................................................   39
  Business Strategy.......................................................   39
  Bank Indebtedness.......................................................   40
  Administrative Claims...................................................   41
  NFG Litigation..........................................................   42
  Fresh Start Reporting...................................................   43
  Reorganization Proceeding...............................................   44
  Properties..............................................................   46
  Competition, Markets and Other External Factors.........................   49
  Regulation..............................................................   50
  Employees...............................................................   50
  Legal Proceedings.......................................................   50
MARKET PRICE INFORMATION..................................................   52
SELECTED CONSOLIDATED FINANCIAL INFORMATION...............................   53
MANAGEMENT'S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF
 OPERATIONS...............................................................   54
  Years Ended December 31, 1996 and 1995..................................   54
  Results of Operations...................................................   54
FINANCIAL CONDITION.......................................................   57
LIQUIDITY AND CAPITAL RESOURCES...........................................   58
PROPOSALS 2 AND (a)--ELECTION OF DIRECTORS................................   59
EXECUTIVE OFFICERS........................................................   61
EMPLOYMENT AGREEMENTS.....................................................   61
EXECUTIVE COMPENSATION....................................................   62
  Summary Compensation Table..............................................   62
</TABLE>    
 
                                       5
<PAGE>
 
                               TABLE OF CONTENTS
                                  (Continued)
 
<TABLE>   
<CAPTION>
                                                                            PAGE
                                                                            ----
<S>                                                                         <C>
  Compensation Committee Interlocks and Insider Participation..............   63
  Report On Executive Compensation.........................................   63
  Stock Based Compensation.................................................   65
CERTAIN STOCK OWNED BY PRINCIPAL STOCKHOLDERS AND MANAGEMENT...............   65
PROPOSAL (b)--SHERIDAN 1997 FLEXIBLE INCENTIVE PLAN........................   67
  General..................................................................   67
  Available Shares.........................................................   67
  Persons Eligible to Participate..........................................   67
  Administration...........................................................   67
  Types of Awards..........................................................   67
  Payment for Awards.......................................................   69
  Amendment and Termination................................................   69
OTHER MATTERS..............................................................   70
INDEPENDENT ACCOUNTANTS....................................................   70
STOCKHOLDER'S PROPOSALS....................................................   70
LEGAL MATTERS..............................................................   70
EXPERTS....................................................................   71
INDEX TO FINANCIAL STATEMENTS..............................................  F-1
APPENDIX A: AGREEMENT OF MERGER............................................  A-1
APPENDIX B: CERTIFICATE OF INCORPORATION OF SHERIDAN ENERGY, INC...........  B-1
APPENDIX C: BYLAWS OF SHERIDAN ENERGY, INC.................................  C-1
APPENDIX D: OPINION OF FINANCIAL ADVISOR...................................  D-1
APPENDIX E: SECTION 262 OF DELAWARE GENERAL CORPORATION LAW................  E-1
APPENDIX F: SHERIDAN 1997 FLEXIBLE INCENTIVE PLAN.......................... FF-1
</TABLE>    
 
                                       6
<PAGE>
 
                                    SUMMARY
   
  The following is a brief summary of certain information contained in this
Proxy Statement/ Prospectus and the Appendices hereto. This summary is
necessarily incomplete and is qualified in its entirety by reference to the
more detailed information and financial statements, including the notes
thereto, contained in this Proxy Statement/Prospectus and the Appendices
hereto. Stockholders are urged to read carefully all of such material. When
referring to matters expected to occur after the Merger is effected, the
"Company" refers to Sheridan. Unless otherwise defined herein, capitalized
terms used in this Proxy Statement/Prospectus have the meanings ascribed to
them in this summary.     
 
DATE, TIME AND PLACE OF MEETINGS
 
  A special meeting of the stockholders of TGX, a Delaware corporation, will be
held on, June 12, 1997 at 10:00 a.m. local time at the Four Seasons Hotel, 1300
Lamar Street, Houston, Texas (the "Meeting"). See "The Meeting."
   
  A special meeting (the "Sheridan Special Meeting") of the stockholders of
Sheridan, a Delaware corporation, will be held as soon, if ever, as the Merger,
described below, is effected at the same place as the Meeting.     
 
RECORD DATE
 
  Holders of record of the common stock, par value $.01 per share (the "Common
Stock"), the Series A Preferred Stock, par value $1.00 per share (the "Senior
Preferred Stock"), and the Cumulative Convertible Preferred Stock, par value
$1.00 per share (the "Old Preferred Stock" and together with the Senior
Preferred Stock, the "Preferred Stock") of TGX, on May 9, 1997 (the "Record
Date") are entitled to notice of and to vote at the Meeting. See "The Meeting."
   
  If the Merger is effected, holders of Senior Preferred Stock will become
holders of Sheridan Common Stock, $.01 par value (the "New Common Stock" or the
"Sheridan Common Stock"). Only holders of Senior Preferred Stock on the Record
Date who receive New Common Stock will be entitled to vote at the Sheridan
Special Meeting.     
 
MATTERS TO BE CONSIDERED AT MEETING
   
  Merger. Holders of the Common Stock and the Preferred Stock will be asked at
the Meeting to adopt the Agreement of Merger (the "Merger Agreement") between
the Company and Sheridan, a wholly-owned subsidiary of the Company, pursuant to
which TGX will merge (the "Merger") with and into Sheridan, and Sheridan will
continue the business of TGX under the name "Sheridan Energy, Inc." See "The
Merger."     
 
  Election of Directors. At the Meeting, holders of the Common Stock and the
Preferred Stock will be asked to elect Jonathan P. Carroll, Michael A. Gerlich,
David H. Scheiber and Jeffrey E. Susskind (the "Nominees") to the board of
directors of the Company. See "Proposals 2 and (a)--Election of Directors."
   
  At the Sheridan Special Meeting, the holders of New Common Stock will be
asked to elect the Nominees to be the board of directors of Sheridan. See
"Proposals 2 and (a)--Election of Directors."     
   
  Unless the context otherwise requires, as used herein, the term "the Board"
or "the Board of Directors" means the TGX Board until the Merger is effected,
and the Sheridan Board thereafter.     
   
  Flexible Incentive Plan. At the Sheridan Special Meeting, holders of New
Common Stock will also be asked to approve the Sheridan 1997 Flexible Incentive
Plan (the "Flexible Incentive Plan") adopted by the     
 
                                       7
<PAGE>
 
   
Board, to be effective upon consummation of the Merger if the Merger Agreement
is adopted. The purpose of the Flexible Incentive Plan is to enable Sheridan to
attract, motivate and retain highly qualified officers, employees, directors
and consultants by permitting Sheridan to make awards recognizing the creation
of long-term value for the stockholders of Sheridan. To accomplish this
purpose, the Flexible Incentive Plan provides that eligible persons may be
granted stock options, stock appreciation rights, restricted stock, performance
awards, performance stock, dividend equivalent rights or any combination
thereof. The aggregate number of shares of Sheridan Common Stock that may be
issued (or with respect to which awards may be granted) under the Flexible
Incentive Plan may not exceed 450,000 shares. See "Proposal (b)--Sheridan 1997
Flexible Incentive Plan."     
 
RISK FACTORS
   
  When evaluating the Merger Agreement, stockholders should be aware of certain
risk factors relating thereto. Such risk factors include those associated with
the existing operations and assets of TGX, which following the consummation of
the Merger will be continued by Sheridan, and the lack of assurances as to a
market for the New Common Stock, or the market price of the New Common Stock.
See "Risk Factors."     
 
VOTE REQUIRED
   
  Pursuant to the Company's Certificate of Incorporation, holders of the Senior
Preferred Stock are entitled in the aggregate to vote 95% of the combined votes
of all TGX Stockholders. Therefore, such Senior Preferred Stockholders are
entitled to cast 55.7121 votes per share, and holders of the Old Preferred
Stock and Common Stock are entitled to cast one vote per share with respect to
adoption of the Merger Agreement and the election of the TGX directors. The
Merger Agreement will be adopted by the stockholders if a majority of the votes
of holders of the outstanding Common Stock and Preferred Stock voting together
as one class are voted for such adoption. With respect to the five directors of
TGX to be elected by the holders of the Common Stock and the Preferred Stock
and the five directors of Sheridan to be elected by holders of New Common Stock
(the previous holders of Senior Preferred Stock of TGX) if the Merger is
effected, the nominees who receive a plurality of the votes cast by such
holders will be elected.     
   
  Approval of the Flexible Incentive Plan (the "Plan") requires the affirmative
vote of a majority of the votes cast by the holders of shares of New Common
Stock (the previous holders of Senior Preferred Stock) voting in person or by
proxy and entitled to be voted thereon at the Sheridan Special Meeting.
However, the Plan will not be implemented if the Merger is not approved.
Therefore, a vote against the Merger may be, in effect, a vote against the
Plan.     
 
  Broker nonvotes and abstentions will have the same effect as a vote AGAINST
adoption of the Merger Agreement. Because the election of directors and
approval of the Plan require a plurality and a majority, respectively, of the
votes cast by stockholders present in person or by proxy, broker nonvotes will
not affect the outcome of the election of directors or the approval of the
Plan. Abstentions, while not affecting the election of directors which requires
only a plurality of the votes cast by stockholders present in person or by
proxy, will have the same effect as a vote against approval of the Plan, which
require a majority of the votes cast by stockholders present in person or by
proxy. See "The Meeting -Quorum; Vote Required."
   
  As of the Record Date, the directors and executive officers of TGX and their
affiliates, as a group, had the power to vote approximately 1,818,002 shares of
the Senior Preferred Stock, representing 101,284,708 votes, which is
approximately 19.9% of the votes that may be cast by the holders of all of the
outstanding securities of TGX as of the Record Date and 21.0% of the Sheridan
votes that may be cast by the holders of Sheridan Common Stock resulting from
the Merger as of the Record Date.     
 
                                       8
<PAGE>
 
 
RECOMMENDATION OF BOARD
 
  The Board has determined that the terms of the proposed Merger are fair to
the common shareholders of TGX since, as described below, in the opinion of
American Appraisal, the independent appraisal and valuation firm which was
retained by the Board to review the fairness of the transaction to the TGX
Stockholders, such transaction is fair, from financial point of view to all of
the TGX Stockholders. In addition, in view of the Board's reasonable estimate
of the value of the Company, and the large preference amount which must be paid
to the Senior Preferred stockholders, together with the large preferred
dividends which are accruing each year, the Board believes that it is extremely
unlikely that the TGX Common stockholders will ever obtain any value for such
common shares. The Board believes that there is no alternative course of
action, including bankruptcy, reorganization, etc., which would render greater
value than zero to the TGX Common Stockholders or holders of the Old Preferred
Stock.
   
  THE BOARD, THEREFORE, RECOMMENDS THAT THE HOLDERS OF THE PREFERRED STOCK AND
THE COMMON STOCK VOTE "FOR" THE NOMINEES TO THE BOARD. THE BOARD HAS
UNANIMOUSLY APPROVED THE MERGER AGREEMENT AND THE FLEXIBLE INCENTIVE PLAN AND
UNANIMOUSLY RECOMMENDS THAT STOCKHOLDERS VOTE "FOR" ADOPTION OF THE MERGER
AGREEMENT AND APPROVAL OF THE FLEXIBLE INCENTIVE PLAN. See "Proposal 1--The
Merger -- Recommendation of Board"; "Proposal (b)--Sheridan 1997 Flexible
Incentive Plan". Messrs. Gerlich, Susskind and Scheiber, members of the Board,
together hold 21.0% of the outstanding shares of Senior Preferred Stock and
have indicated their intention to vote FOR each of the matters being brought
before the Meeting and the Sheridan Special Meeting.     
 
CONFLICT OF INTEREST
 
  Because of the proposed elimination of the Old Preferred Stock, other than
Senior Preferred Stock, and the TGX Common Stock, which could, under certain
circumstances, provide an additional benefit to the current holders of TGX
Senior Preferred Stock, the Board of Directors, which owns, in the aggregate,
1,818,002 shares of TGX Senior Preferred Stock could be deemed to have a
conflict of interest in recommending the Merger.
 
MARKET FOR TGX STOCK
 
  The TGX Old Preferred Stock has not traded publicly since its issuance, and
the TGX Senior Preferred Stock and Common Stock trade sporadically and
infrequently. The most recent reported trade of TGX Senior Preferred and Common
Stock was at a price of $.25 and $.01 per share, respectively. The TGX Senior
Preferred Stock and Common Stock are listed on the Nasdaq Bulletin Board. See
"Market Price Information."
 
THE COMPANIES
 
  TGX. TGX is a domestic independent energy company engaged in oil and gas
exploration and production and also in intrastate natural gas gathering and
treating. At March 31, 1997 TGX had 11 employees. The executive offices of TGX
are located at 222 Pennbright, Suite 200, Houston, Texas 77090 and its
telephone number is (281) 872-0500. See "Business and Properties of the
Company."
   
  Sheridan. Sheridan has been incorporated as a Delaware corporation and
wholly-owned subsidiary of TGX to accomplish the Merger. Following consummation
of the Merger, Sheridan will conduct the operations of TGX as the surviving
corporation. Sheridan's executive offices are located at 222 Pennbright, Suite
200, Houston, Texas 77090 and its telephone number is (281) 872-0500. Sheridan
was organized solely for the purpose of this Merger, and prior to the
consummation of the Merger had no independent operations. If the Merger is
successfully consummated, Sheridan will be engaged in the operations currently
engaged in by TGX.     
 
                                       9
<PAGE>
 
 
REASONS FOR MERGER
   
  The Board believes that the proposed Merger will help to position the Company
(1) to meet the economic and industry demands presently being placed on TGX as
a result of the need to have significantly greater capital than TGX presently
has access to in order to drill exploratory and development wells, to acquire
leasehold interests, and to operate producing wells and oil and gas fields; (2)
to create the flexibility and liquidity required for the future stability and
growth of TGX by permitting Sheridan to seek additional equity financing
through the possible sale of common shares without the hindrance of a
significant and substantial preferred stock preference and dividend having
priority to the common shares. Sheridan can, of course, make no prediction or
assurances whether or not it, in fact, will be able to sell such additional
shares of common stock or, whether or not, if a sale is made, such sale will
significantly enhance Sheridan's stability and growth; (3) to advance the
strategic objectives of TGX by allowing Sheridan to raise additional capital
and, therefore, to increase its acquisition of leasehold interests and its
participation in drilling exploratory and development wells; and (4) to enhance
TGX Senior Preferred Stockholders' value, the only TGX Stockholders who will
have a continuing interest in Sheridan, by providing a more readily available
public market as well as by providing the opportunity to seek additional
capital and, thereby, to potentially grow Sheridan's ability to conduct further
oil and gas exploration and development. See "Proposal 1--The Merger--
Background and Reasons for The Merger."     
 
OPINION OF APPRAISAL AND VALUATION FIRM
 
  American Appraisal is acting as a financial adviser to TGX in connection with
the Merger and has rendered an opinion to TGX's Board of Directors that the
consideration to be received by the TGX stockholders is fair, from a financial
point of view. American Appraisal has received a retainer fee and, upon
completion of the Merger, American Appraisal will receive certain fees for its
role as financial adviser to TGX in this transaction. The full text of the
opinion of American Appraisal is set forth as Appendix "D" to this Proxy
Statement/Prospectus. See "The Merger--Opinion of Appraisal and Valuation
Firm."
 
LIMITATIONS ON OPINION OF APPRAISAL AND VALUATION FIRM
 
  In reviewing the opinion of American Appraisal, the Company's stockholders
should be alerted to the fact that American Appraisal, in rendering its
opinion, reviewed certain financial information concerning the Company and
certain internal financial and other information with respect to the business,
operations, and prospects of the Company. In addition, American Appraisal: (a)
reviewed the reported price and trading activities for the Company's common
stock and senior preferred stock; (b) compared certain financial and stock
market information for the Company with similar information for certain
selected companies whose securities are publicly traded; (c) reviewed the terms
of the Merger Agreement and the financial terms of the transaction; and (d)
performed such other studies and analyses, and considered such other factors,
as they deemed appropriate for the purposes of rendering its opinion. For
further information see "The Merger--Opinion of Appraisal and Valuation Firm."
American Appraisal confirmed its opinion within five days of the mailing of
this Proxy Statement/Prospectus. American Appraisal will further confirm its
opinion within five days of the Meeting.
 
APPRAISAL RIGHTS
 
  Under the Delaware General Corporation Law, a holder of shares of the
Preferred Stock will have the right to demand appraisal of the fair value of
such shares by the Delaware Court of Chancery and payment therefor in
accordance with such determination. Each holder electing to demand appraisal
rights must deliver or cause to be delivered a written demand for appraisal of
such holder's shares before the taking of the vote on the Merger and must
comply with the other requirements of Section 262 of the Delaware General
Corporation Law, the full text of which is attached to this Proxy
Statement/Prospectus as Appendix "E". A holder's vote for adoption of the
Merger Agreement or delivery of a proxy in connection with the Meeting (unless
the proxy specifies a vote against or expressly abstains from the vote on
adoption of the Merger Agreement) will constitute a withdrawal of such holder's
demand for appraisal. A deviation from the detailed requirements of Section 262
may result in a forfeiture of appraisal rights.
 
                                       10
<PAGE>
 
 
  Holders of Common Stock do not have the right to demand appraisal rights as
Delaware law does not provide for such rights when shares are held of record by
more than 2,000 stockholders. On March 31, 1997, the Common Stock was held by
approximately 4,000 stockholders of record.
 
  See "Proposal 1--The Merger--Appraisal Rights".
 
TAX CONSIDERATIONS
   
  The Merger is expected to be a tax-free reorganization for Federal income tax
purposes, so that no gain or loss will be recognized by holders of TGX Senior
Preferred Stock on the exchange of such stock for Sheridan Common Stock, except
to the extent that such shareholders receive cash upon exercise of appraisal or
dissenters' rights or for fractional shares. Holders of all other classes of
TGX Preferred Stock and TGX Common Stock will realize a capital loss upon
cancellation of their shares in the Merger, equal to their respective bases, if
any, in such shares. The Merger Agreement does not require the parties to
obtain a ruling from the Internal Revenue Service as to the tax consequences of
the Merger. Shareholders of TGX are urged to consult their own tax advisors
regarding the tax consequences of the Merger. See "The Merger--Certain Federal
Income Tax Considerations".     
 
SURRENDER OF CERTIFICATES
   
  American Stock Transfer & Trust Company will act as Exchange Agent for the
exchange of Sheridan stock certificates for TGX stock certificates. Upon the
effectiveness of the Merger, TGX Senior Preferred Stockholders will receive
instructions for exchanging certificates.     
 
PRO-FORMA INFORMATION
 
  The following table provides information concerning the book value and income
(loss) per share of TGX Corporation and the pro-forma combined book value and
income (loss) per share after giving effect to the Merger and the impact of
1996 producing property acquisitions as if such had been acquired at the
beginning of the year.
 
<TABLE>
<CAPTION>
                                                              DECEMBER 31, 1996
                                                             -------------------
                                                                          PRO
                                                             HISTORICAL FORMA(1)
                                                             ---------- --------
<S>                                                          <C>        <C>
Book value per share........................................   $(2.79)   $2.48
Cash dividends per share....................................       --       --
Income (loss) per share from continuing operations..........     (.42)    2.21
</TABLE>
--------
   
(1) Represents Sheridan Energy, Inc. after pro-forma adjustments. See
    "Unaudited Pro Forma Summary Condensed Combined Financial Information" and
    notes thereto.     
 
                                       11
<PAGE>
 
                             SUMMARY FINANCIAL DATA
 
                       (THOUSANDS, EXCEPT PER SHARE DATA)
 
                                TGX CORPORATION
 
<TABLE>
<CAPTION>
                                                               YEAR ENDED
                                                              DECEMBER 31,
                                                            ------------------
                                                              1996      1995
                                                            --------  --------
<S>                                                         <C>       <C>
STATEMENT OF OPERATIONS DATA:
  Revenues(1).............................................. $ 13,800  $  4,597
  Gross profit.............................................    2,848     1,706
  Net loss applicable to common stock(1)...................   (8,812)  (17,693)
  Net loss per share of common stock.......................    (0.35)    (0.71)
  Average common shares outstanding........................   24,956    25,105
  Capital expenditures.....................................    4,280     1,128
BALANCE SHEET DATA:
  Working capital (deficit)................................ $  1,015  $ (1,771)
  Property and equipment, net..............................   10,636     7,411
  Total assets.............................................   15,547     9,791
  Long-term debt...........................................    1,500     5,835
  Redeemable Senior Preferred Stock........................   80,726    61,737
  Stockholders' equity (deficit)...........................  (69,676)  (61,134)
COMMON STOCK:
  Shares outstanding at end of period......................   24,956    24,956
</TABLE>
                              
                           SHERIDAN ENERGY, INC.     
 
                                  PRO-FORMA(2)
                                  (UNAUDITED)
<TABLE>   
<CAPTION>
                                                                  YEAR ENDED
                                                               DECEMBER 31, 1996
                                                               -----------------
<S>                                                            <C>
STATEMENT OF OPERATIONS DATA:
  Revenues(1).................................................      $14,830
  Gross profit................................................        3,368
  Net income before extraordinary gain........................        9,718
  Per share of common stock amounts...........................         2.21
  Average common shares outstanding...........................        4,405
  Capital expenditures........................................        4,280
BALANCE SHEET DATA:
  Working capital.............................................      $   885
  Property and equipment, net.................................       10,636
  Total assets................................................       15,547
  Long-term debt..............................................        1,500
  Stockholders' equity........................................       10,920
COMMON STOCK:
  Shares outstanding at end of period.........................        4,394
</TABLE>    
--------
(1) Year ended December 31, 1996 revenues includes $7.1 million of net
    litigation settlement proceeds. (See Note 3).
(2) Gives pro forma effect to the Merger for the year ended December 31, 1996
    assuming the Merger had been consummated at the beginning of such period
    and the impact of 1996 producing property acquisitions as if such had been
    acquired at the beginning of the year. See "Unaudited Pro Forma Summary
    Condensed Combined Financial Information" and notes thereto.
 
                                       12
<PAGE>
 
                                SPECIAL FACTORS
 
PURPOSES OF MERGER
   
  The merger transaction (the "Merger") described in this Proxy
Statement/Prospectus is proposed by the Board of Directors (the "Board") of TGX
Corporation ("TGX" or the "Company") as a means to help position TGX (1) to
meet the economic and industry demands presently being placed on the Company as
a result of the need to have significantly greater capital than the Company
presently can gain access to in order to drill exploratory and development
wells, to acquire leasehold interests, and to operate producing wells and oil
and gas fields; (2) to create the flexibility and liquidity required for the
future stability and growth of the Company by permitting its successor Sheridan
Energy, Inc. ("Sheridan"), a corporation organized by TGX solely for the
purpose of carrying out the terms of the Merger, to seek additional equity
financing through the potential sale of common shares without the hindrance of
a significant and substantial preferred stock preference and dividend having
priority over the common shares (although no assurance can be given that
Sheridan would be able to sell such additional shares of common stock or
whether such a sale, if made, would significantly enhance the stability and
growth of Sheridan); (3) to advance the strategic objectives of the Company by
allowing its successor Sheridan to raise additional capital and therefore to
increase Sheridan's acquisition of leasehold interests and its participation in
drilling exploratory and development wells; and (4) to enhance value for the
TGX Senior Preferred Stockholders, the only TGX securityholders which will have
a continuing interest in Sheridan, by providing the possibility of a more
readily available public market and the opportunity to seek additional capital,
thereby expanding the ability of its successor Sheridan to conduct further oil
and gas exploration and development. See "Summary--Reasons for Merger" and
"Proposal 1--The Merger--Background and Reasons for the Merger."     
 
ALTERNATIVES CONSIDERED
 
  The Board analyzed various alternatives by which it might achieve the
purposes set forth above. These alternatives included the sale of common stock
of the Company, merger with one or more companies (preferably one whose
securities were publicly traded) whereby the Company would receive a premium
for its assets, a rights offering with existing stockholders, acquisition of
additional debt to conduct operations, and liquidation. The Board concluded
that it would be highly unlikely that additional common stock could be sold
because of the significant dividend arrearages and liquidation preference of
the Senior Preferred Stock, that the acquisition of additional debt for the
conduct of exploration would not be viable or represent the best use of the
Company's assets, that a rights offering to existing stockholders would neither
be successful nor justify the transactional costs required to accomplish it,
that a merger with one or more currently operating companies would be unlikely
to provide any benefit to the Company's common stockholders or provide a
premium for the holders of the Senior Preferred Stock and that liquidation
would not provide the greatest benefit for the holders of the Senior Preferred
Stock. See "Proposal 1--The Merger--Background and Reasons for the Merger." The
Company was engaged in preliminary confidential negotiations with one privately
held oil and gas company which, if the transaction had been consummated, would
not have provided any benefit to the Company's Common Stockholders.
Negotiations began in early 1996 with the company and were terminated in
approximately April 1996. Moreover, in view of the large discrepancy between
any reasonably measurable value of the Company and the Senior Preferred Stock
preference, the Board of Directors did not believe any reasonable offer could
provide value to the Company's Common Stockholders.
 
REASONS FOR STRUCTURE AND TIMING OF TRANSACTION
 
  Early in 1990, the Company filed a voluntary petition in the Louisiana
Federal Bankruptcy Court for reorganization. The Amended Plan of Reorganization
(the "Reorganization Plan") was confirmed in 1992 and pursuant thereto the
Company's secured indebtedness was restructured and certain claims were paid in
cash. Unsecured creditors received shares of the Senior Preferred Stock, which
pursuant to the terms of the Plan were
 
                                       13
<PAGE>
 
entitled to cumulative dividends and were required to be redeemed in an amount
equal to the liquidation preference of $10.00 per share plus accrued but unpaid
dividends on or before January 21, 2002. Such Senior Preferred Stockholders
were entitled to 95% of the combined votes of all TGX security holders on such
matters as the Merger. Because it was considered possible that a resolution of
ongoing litigation (the "NFG Litigation") with National Fuel Gas Distribution
Company after confirmation of the Reorganization Plan might result in a payment
to the Company sufficient, either by itself or together with a portion (but not
all) of the assets of the Company, to redeem the Senior Preferred Stock issued
in satisfaction of unsecured claims and that there would, therefore, remain
some value in the Company for those who before commencement of the
reorganization held equity interests in the Company, such holders of pre-
reorganization equity interests retained their interests upon consummation of
the reorganization.
 
  On April 12, 1996 the NFG Litigation was settled. After paying obligations
required to be paid out of the proceeds of the settlement, the Company retained
approximately $3,500,000, a sum insufficient to redeem a significant amount of
the Senior Preferred Stock. Redemption of the Senior Preferred Stock would
currently require an aggregate payment of approximately $143,259,000. Neither
the book value of the Company at December 31, 1996 of $11,050,000, nor its
revenues, considered singly or together, are sufficient to redeem a significant
amount of the Senior Preferred Stock in accordance with the terms thereof.
Under these circumstances, moreover, neither the Common Stock of the Company
nor the Old Preferred Stock issued before the reorganization has any current
value and cannot, under any reasonably foreseeable circumstances, be expected
to have any value attributed to it in the future, based on the Company's
existing and reasonably foreseeable operations. In addition, because a
substantial recovery from the NFG Litigation did not occur, the Company must
eliminate its obligations with respect to the Senior Preferred Stock so that it
may explore other opportunities for raising capital to conduct and increase the
profitability of its operations. In light of its consideration of the
alternatives and the absence of current or reasonably foreseeable prospective
value in the Company's Common Stock and Old Preferred Stock after taking into
account the rights of the Senior Preferred Stock, the Board has concluded that
the transaction proposed in this Proxy Statement/Prospectus offers the most
reasonable opportunity for the Company to continue its operations with any
prospect of stability or growth. See "Summary", "Proposal 1--Background and
Reasons for the Merger" and "Business and Properties of the Company."
 
EFFECTS OF TRANSACTION
   
  Upon consummation of the Merger , Sheridan as successor to the Company, will
have only common stock outstanding. Although the Sheridan Articles provide
Sheridan with the flexibility to issue preferred stock, there is no present
intention to issue such stock and Sheridan will, therefore, neither be
obligated to pay the accrued but unpaid dividends of the Senior Preferred Stock
or the Old Preferred Stock nor be subject to any such existing obligation of
its own. The Merger will be recorded as a reorganization of related parties
with carry-over basis of assets and liabilities. The Sheridan Common Stock will
be recorded at the historical-basis carrying value of the aggregate of the Old
Preferred Stock of the Company, the Common Stock of the Company and the initial
value ascribed to the Senior Preferred Stock of the Company upon issuance of
the shares thereof, as reflected in the accounting records of the Company on
the date of the exchange. Upon cancellation of the Old Preferred Stock and the
Senior Preferred Stock, all previously recorded accrued but unpaid dividends
will be credited to accumulated deficit. No gain or loss will be recognized for
accounting purposes upon consummation of the Merger. The costs of soliciting
proxies and effecting the Merger will be charged to expense as incurred. See
"Proposal 1--The Merger--The Merger Agreement," "--Accounting Treatment" and
"Description of Sheridan Securities."     
   
  Under the Merger Agreement each outstanding share of Senior Preferred Stock
will, upon consummation of the Merger, be automatically converted into and
become a right to receive one-half share of Sheridan Common Stock. All rights
with respect to accrued but unpaid dividends will cease and dividends will
cease to accrue with     
 
                                       14
<PAGE>
 
   
respect to shares of Senior Preferred Stock. Because there has been no trading
in the Senior Preferred Stock, the Board has estimated a fair value of $1.26
per share of the Senior Preferred Stock before consummation of the Merger and
$2.52 per share for the Sheridan Common Stock after the consummation of the
Merger by dividing the book value of the Company at December 31, 1996 by the
number of shares of Senior Preferred Stock outstanding at December 31, 1996 and
the Sheridan Common Stock that will be outstanding upon consummation of the
Merger. Each share of Old Preferred Stock and of Common Stock will
automatically be cancelled upon consummation of the Merger, and the holders
thereof will not receive any consideration in respect of such cancellation. If
the Merger qualifies as a tax-free reorganization, as management of the Company
believes, the Merger will generally result in the following federal income tax
consequences: (a) no gain or loss will be recognized by the holders of the
Senior Preferred Stock upon receipt of the Sheridan Common Stock solely in
exchange for the Senior Preferred Stock in the Merger (except to the extent of
cash received as a result of exercising dissenters' or appraisal rights or in
lieu of fractional shares); (b) the aggregate tax basis of the Sheridan Common
Stock so received by the holders of the Senior Preferred Stock will be the same
as the aggregate tax basis of the Senior Preferred Stock surrendered in
exchange therefor; (c) the holding period of the Sheridan Common Stock so
received in the Merger will include the holding period of the Senior Preferred
Stock surrendered therefor, if the Senior Preferred Stock so surrendered is
held as a capital asset at the time of the Merger; (d) a stockholder of the
Company who exercises appraisal or dissenters' rights under applicable law with
respect to shares of stock of the Company and receives payment for such shares
in cash or receives cash in lieu of fractional shares will recognize gain or
loss measured by the difference between the amount of cash received and the
stockholder's basis in such shares; (e) holders of Common Stock and Old
Preferred Stock of the Company will realize a capital loss upon cancellation of
such shares in the Merger equal to their respective basis, if any, in such
shares and (f) neither the Company nor Sheridan will recognize gain solely as a
result of the Merger. See "Proposal 1--The Merger--The Merger Agreement," "--
Exchange of Certificates" and "--Certain Federal Income Tax Considerations."
       
  Mr. Jeffrey E. Susskind, a member of the Board, presently holds 1,778,002
shares of Senior Preferred Stock, or 20.5% of the currently outstanding Senior
Preferred Stock, and upon consummation of the Merger will hold 889,001 shares
of Sheridan Common Stock, or 20.5% of the outstanding Sheridan Common Stock,
constituting an interest of approximately 20.5% or $2,265,000 in the net book
value of the Company and 20.5% or $1,886,000 in the net pro forma income of the
Company for the year ended December 31, 1996. See "Proposal 1--The Merger--
Interests of Certain Persons in the Merger."     
 
FAIRNESS OF TRANSACTION
 
  The Board, including Mr. Susskind, unanimously believes that the terms of the
proposed Merger are fair to the unaffiliated security holders and has
unanimously approved the Merger. However, in view of their holdings of Senior
Preferred Stock, there may be a conflict of interest between the Board and the
TGX Common and Old Preferred Stockholders. Redemption of the Senior Preferred
Stock, required before any value can be ascribed to the Old Preferred Stock or
the Common Stock, would currently require an aggregate payment of approximately
$143,259,000, while the Company's book value at December 31, 1996 was
$11,050,000. In view of the Company's annual revenues and the continuing
accrual of dividends on the Senior Preferred Stock, the Board believes that it
is extremely unlikely that the holders of the Common Stock and Old Preferred
Stock would ever obtain any value for such shares. In addition to its estimate
of the book value of the Company and its value as an ongoing business, the
Board reviewed and considered the opinion and analyses of American Appraisal
Associates, Inc., ("American Appraisal") engaged by the Board to provide an
opinion, from a financial point of view, with respect to the Merger, with
respect to the discounted net cash flow, the net asset value and the
liquidation value of the Company in arriving at the Board's belief as to the
fairness of the Merger to its stockholders. Under none of these estimates did
it appear reasonably likely to the Board that the shares of Common Stock or Old
Preferred Stock had any value or that there was a reasonable likelihood that a
value in excess of the book value of the Company could be obtained for the
holders of the Senior Preferred Stock. See
 
                                       15
<PAGE>
 
"Summary--Recommendation of the Board," "--Opinion of Appraisal and Valuation
Firm," "Proposal 1--The Merger--Background and Reasons for the Merger," "--
Recommendation of Board" and "--Opinion of Appraisal and Valuation Firm." The
transaction is not structured so that approval of at least a majority of
unaffiliated security holders is required, nor has a majority of directors who
are not employees of the Company retained an unaffiliated representative to act
solely on behalf of unaffiliated security holders for the purposes of
negotiating the terms of the transaction or preparing a report concerning the
fairness of the transaction. The transaction has been unanimously approved by
the Board. See "Summary--Recommendation of Board" and "Proposal 1--The Merger--
Recommendation of Board."
 
OPINION OF APPRAISAL AND VALUATION FIRM
 
  American Appraisal was engaged by TGX pursuant to an engagement letter dated
July 1, 1996 (the "Engagement Letter") to act as its financial adviser in
connection with the Merger. In connection with such engagement, TGX requested
American Appraisal to render an opinion as to the fairness, from a financial
point of view, of the Merger to TGX Stockholders.
 
  American Appraisal is an internationally recognized firm engaged in the
valuation of businesses and securities in connection with mergers and
acquisitions, private placements, and evaluations for estate, corporate and
other purposes. TGX's Board of Directors selected American Appraisal as its
financial adviser because of their expertise, reputation and familiarity with
the oil and gas industry.
 
  Pursuant to the terms of the Engagement Letter, American Appraisal was paid a
$10,000 retainer and, upon consummation of the Merger, will be entitled to an
additional fee from TGX of $20,000 plus out-of-pocket and other expenses. TGX
has also agreed to indemnify American Appraisal against certain liabilities,
including liabilities under the federal securities laws, and, if the Merger is
not consummated, to reimburse American Appraisal for reasonable expenses
incurred by them, including reasonable fees and disbursements of their counsel.
 
  On August 22, 1996, in connection with the valuation of the Merger by the TGX
Board, American Appraisal rendered its oral opinion, subsequently confirmed in
writing, that, as of the date of such opinion, and subject to certain
assumptions, factors and limitations set forth in such written opinion, the
consideration to be received by the Stockholders of TGX, which was determined
by the Board, was fair, from a financial point of view. American Appraisal has
re-confirmed its opinion as of March 21, 1997 utilizing updated financial and
other information.
 
  American Appraisal's opinion addresses only the fairness of the terms of the
Merger, from a financial point of view, to the Stockholders of TGX and does not
constitute a recommendation to any TGX stockholder as to how to vote with
respect to the Merger.
 
  In the course of rendering its opinion, American Appraisal prepared a report
to the Board which, among other things: (i) reviewed and analyzed historical
operating and financial information of TGX; (ii) reviewed and analyzed the
historical trading volume and public market prices of the Common Stock, and a
private sale of the Senior Preferred Stock; (iii) reviewed market
capitalizations, price to earnings ratios and other valuation measurements of
publicly held companies, whose lines of business were comparable to those of
TGX; (iv) held discussions with TGX senior management and (v) performed other
financial studies, analyses and investigations and other factors as were deemed
necessary and appropriate for purposes of the opinion expressed herein.
 
  As part of its study, American Appraisal valued the TGX Preferred Stock and
Common Stock as of July 31, 1996 and subsequently updated its valuation to
December 31, 1996. This valuation study was comprised of (i) a present value
analysis of the future net operating cash flow potential of the Company's
current oil and
 
                                       16
<PAGE>
 
gas reserves, (ii) a study of the market prices of publicly held companies and
transaction prices of acquired companies, whose lines of business are
comparable to that of TGX and (iii) an analysis of the public market price for
TGX's publicly traded Common Stock and the terms of a private sale of Senior
Preferred Stock.
 
 Discounted Net Cash Flow Analysis
 
  Based on Company near term management-prepared projections and a discount
rate of 16.20%, American Appraisal estimated that the present value of the
Company's future net operating cash flow ranged from $18,000,000 to
$19,000,000.
 
 Net Asset Value Analysis
 
  The Company's balance sheet was restated to reflect current market value of
its assets and liabilities, such estimates provided by American Appraisal and
management (the latter provided an estimate of value for the Comite Field Plant
Venture and Gathering Systems). Based on this analysis, the net asset value of
the Company's Senior Preferred Stock ranged from $18,000,000 to $19,000,000 and
the Common Stock and the Old Preferred had no value.
 
 Liquidation Value Analysis
 
  American Appraisal restated TGX's balance sheet to reflect liquidation value
of assets and liabilities. Discounts were applied to the market values to
account for the negative impact on value of assets and liabilities attributed
to conditions surrounding the cessation of the Company's business operations
and subsequent liquidation of its assets and payment of liabilities. The
results of this analysis indicated that the liquidation value of the Senior
Preferred Stock ranged from $12,000,000 to $13,000,000 and the Common Stock and
the Old Preferred had no value.
 
 Comparable Company and Acquisition Study
 
  For the purpose of comparing operating and financial performance from a
valuation point of view, American Appraisal analyzed seven publicly held
companies whose lines of business are comparable to those of TGX and five
public or private companies whose lines of business were also comparable to TGX
but had been acquired or merged with other companies prior to the date hereof.
Based on this analysis, American Appraisal estimated that the total value of
the Company's stockholders' equity ranged from $26,000,000 to $30,000,000 and
the Common Stock and the Old Preferred had no value.
 
 Public Market Price of Common and Preferred Stock
 
  In the opinion of American Appraisal, the absence of meaningful stock price
quotations and trading activity of the Common Stock to a large extent reflected
(i) TGX's continued operating losses, (ii) the low probability of any growth in
earnings over the long term under the Company's current capital structure and
(iii) the extreme improbability of TGX's ability to redeem the Senior Preferred
Stock for any value greater than the estimated current net asset value of the
Company's total stockholders' equity (such value representing approximately 13%
to 14% of the current face value of the Preferred Stock).
 
  American Appraisal's financial and valuation analysis resulted in the
following conclusions that affected the fairness of the Merger to the holders
of the Preferred Stock and the market value of the Common Stock.
 
    (i) Removal of the Senior Preferred Stock redemption liability will
  ensure the Company's ability to continue to operate as a going concern over
  the long term and enhance its near and long term growth potential;
 
 
                                       17
<PAGE>
 
    (ii) The redemption value of the Senior Preferred Stock is no greater
  than the net asset value of the Company, an amount that is currently
  substantially below the amount of the redemption liability and is not
  expected to materially change over the long term;
 
    (iii) The senior preference position of the Senior Preferred Stock will,
  to a large extent, be matched by the GeoStat Common Stock after the Merger;
 
    (iv) The Old Preferred Stock and the TGX Common Stock each has no current
  market value because of the senior position of the redemption liability of
  the Senior Preferred Stock and is not expected to have any market value
  over the long term;
     
    (v) The Sheridan Common Stock will provide greater liquidity to the
  holders of the Senior Preferred Stock.     
 
  The opinion of American Appraisal has been provided to the security holders
of the Company as Appendix "D" hereto. In addition, such opinion will be made
available during the regular business hours of the Company for inspection and
copying at 222 Pennbright, Suite 200, Houston, Texas 77090, the principal
executive offices of the Company, by any interested security holder or
representative of such security holder designated in writing. See "The Merger--
Opinion of Appraisal and Valuation Firm."
 
                                       18
<PAGE>
 
                                 RISK FACTORS
 
  Stockholders should carefully examine the entire Proxy Statement/Prospectus
and should give particular attention to the following risk factors.
 
EXECUTIVE OFFICER VACANCIES
 
  In February 1997, Mr. Larry H. Carpenter, previously Chairman of the Board,
President, and Chief Executive Officer, resigned his position. Mr. Michael A.
Gerlich, Chief Financial Officer, has been appointed by the Board of Directors
to act as Interim President of the Company. The Board of Directors is actively
searching for a person to replace Mr. Carpenter and to assume the office of
President and Chief Executive Officer of the Company. Until such time as a
suitable replacement is found, the Board of Directors has determined to
significantly curtail the Company's exploration and development operations.
There can be no assurances when, if ever, a suitable replacement will be found
and, if found, the cost and expense to the Company of retaining such person.
In addition, the Board of Directors cannot determine what effect the vacancy
in the office of President and Chief Executive Officer will have on current
and future prospects of the Company.
 
VOLATILITY OF OIL, GAS AND NATURAL GAS LIQUID PRICES
 
  The Company's revenues, profitability, cash flow, future growth and the
carrying value of its oil and gas properties are affected by changes in oil,
gas and natural gas liquid ("NGL") prices. The Company's ability to maintain
or increase its borrowing capacity and to obtain additional capital on
attractive terms is also substantially dependent upon such prices. Prices for
oil, gas and NGLs are subject to significant fluctuations in response to
market changes beyond the control of the Company including, but not limited
to, weather conditions, the condition of the United States economy, the
actions of the Organization of Petroleum Exporting Countries, governmental
regulation, political stability in the Middle East and elsewhere, foreign
supply of oil and gas, the price of foreign imports and the availability of
alternate fuel sources. These influences have resulted in significant
fluctuations in prices in recent years.
 
  The NYMEX natural gas contract price for December 1996, based on an Mcf
basis, was $4.10 as compared to $2.35 for December 1995. As of December 31,
1996, the per barrel posted price for West Texas Intermediate oil production
("WTI"), the benchmark for domestic oil prices, was $24.42 as compared to
$18.05 for the same date in 1995. Since year-end 1996 oil and natural gas
prices have declined resulting in prices of $19.08 and $1.78, respectively, as
of March 31, 1997. Moreover, the NYMEX natural gas futures price is only an
indicator of price trends and may not be indicative of prices ultimately
realized at the wellhead. Volatile oil and gas prices make it difficult to
estimate the value of producing properties for acquisition and to budget for
and project the return on development and exploitation projects.
 
ESTIMATES OF OIL AND GAS RESERVES
 
  This Proxy Statement/Prospectus contains estimates of proved oil and gas
reserves and the future net cash flows attributable to those reserves prepared
by independent petroleum and geological engineers. There are numerous
uncertainties inherent in estimating quantities of proved oil and gas reserves
and cash flows attributable to such reserves, including factors beyond the
control of the Company and their engineers. Reserve engineering is a
subjective process of estimating underground accumulations of oil and gas that
cannot be measured in an exact manner. The accuracy of an estimate of
quantities of reserves, or of cash flows attributable to such reserves, is a
function of the available data, assumptions regarding future oil and gas
prices and expenditures for future development and exploitation activities,
and of engineering and geological interpretation and judgment. Additionally,
reserves and future cash flows may be subject to material downward or upward
revisions, based upon production history, development and exploration
activities and prices of oil and gas. Actual future production, revenue,
taxes, development expenditures, operating expenses, quantities of recoverable
reserves and the value of cash flows from such reserves may vary significantly
from the assumptions set forth herein. In addition, different reserve
engineers may make different estimates of reserves and cash flows based on the
same available data.
 
                                      19
<PAGE>
 
ACQUISITION AND DEVELOPMENT OF RESERVES
 
  The Company's future success depends upon its ability to find, develop and
acquire additional crude oil and natural gas reserves that are economically
recoverable. Many of the Company's properties are characterized by a high
initial production rate, followed by a steep decline in production. As a
result, the Company must locate and develop or acquire new oil and gas
reserves to replace those being depleted by production. This process is
capital intensive and, for the Company to maintain its asset base of oil and
gas reserves, the Company must reinvest a significant amount of cash flow from
operations in property acquisitions and development and exploration
activities. To the extent cash flow from operations is reduced and external
sources of capital become limited or unavailable, the Company's ability to
make the necessary capital investments to maintain or expand its asset base
would be impaired. Without such investment, the Company's oil and gas reserves
would decline. The Company is also subject to the risks inherent in acquiring
or developing economically recoverable oil and gas reserves, including the
need to invest a significant amount of cash flow in the identification and
acquisition of properties, the drilling and completing of wells and the
conduct of development operations. Except to the extent that the Company
acquires additional recoverable reserves or conducts successful exploration
and development programs, the proved reserves of the Company will decline over
time as they are produced. There can be no assurance that the Company will be
able to increase or replace reserves through acquisitions, exploration and
development at an acceptable cost. The successful acquisition of producing
properties requires an assessment of recoverable reserves, future oil and gas
prices and operating costs, potential environmental and other liabilities and
other factors. Such assessments are necessarily inexact and their accuracy
inherently uncertain. In addition, there can be no assurance that the
Company's exploration and development activities will result in any increases
in reserves. The Company's operations may be curtailed, delayed or cancelled
as a result of lack of adequate capital and other factors, such as title
problems, weather, compliance with governmental regulations or price controls,
mechanical difficulties or shortages or delays in the delivery of equipment.
Moreover, the costs of exploration and development may materially exceed
initial estimates.
 
FUTURE CAPITAL NEEDS
 
  The Company makes, and will continue to make, substantial capital
expenditures for the acquisition, exploration, development and production of
oil and natural gas reserves and the acquisition and development of gas
processing and gas gathering facilities. The Company may seek out joint
venture partners to spread the risk and costs of such acquisitions and
development, use bank and institutional debt financing to fund a portion of
the costs of the facilities or properties or raise additional capital through
the sale of debt or equity securities. No assurance can be made that joint
venture partners or debt financing will be available to fund the Company's
acquisition or development of additional facilities or properties or that the
Company could obtain debt financing or equity capital on terms that the
Company would consider reasonable or, in the case of a sale of equity
securities, on terms that would not be dilutive to existing stockholders. See
"Management's Discussion and Analysis of Financial Condition and Results of
Operations."
 
OPERATING HAZARDS AND UNINSURED RISKS
 
  The Company's operations are subject to the risks inherent in the oil and
gas industry, such as blowouts, cratering, explosions, uncontrollable flows of
crude oil, natural gas or well fluids, product spills, leaks, fires, pollution
and other environmental risks. These risks could result in substantial losses
to the Company due to injury and loss of life, severe damage to and
destruction of property and equipment, pollution and other environmental
damage and suspension of operations. The Company is not fully insured against
all risks incident to its business, and the occurrence of a significant event
not fully insured or indemnified against could materially and adversely affect
the Company's financial condition and results of operations.
 
COMPETITION AND MARKETING
 
  The oil and natural gas industry is highly competitive both in the search
for and acquisition of oil and natural gas reserves and in the refining,
processing and marketing of petroleum products. Competitors include the major
and independent crude oil and natural gas companies, individual producers and
operators and major pipeline
 
                                      20
<PAGE>
 
companies. Other sources of energy, such as coal and nuclear power, also
provide competition, and crude oil and natural gas are subject to substantial
competition from foreign sources. The availability of a ready market, as well
as the price received for natural gas produced and sold by the Company,
depends upon numerous factors beyond its control, including the proximity of
producing natural gas properties to pipelines, the capacity of such pipelines,
fluctuations in seasonal or overall demand, domestic deliverability,
government regulations, and competition from alternative forms of energy. A
trend has emerged recently among major natural gas marketing companies toward
consolidations and mergers, both among themselves and in the form of strategic
alliances with large producers or end-users. These consolidations have tended
to place control of both the supply and the market in hands of a few industry
participants. While specific ramifications of this trend are difficult to
predict, it will likely have an impact on the way natural gas is bought and
sold in the future and this impact could be potentially more significant to
the smaller independent producers such as the Company.
 
ENVIRONMENTAL AND OTHER REGULATION
 
  The Company's operations are subject to numerous laws and regulations
governing the discharge of materials into the environment or otherwise
relating to environmental protection. These laws and regulations require the
acquisition of a permit before drilling commences, restrict the types,
quantities and concentration of various substances that can be released into
the environment in connection with drilling and production activities, limit
or prohibit drilling activities on certain lands lying within wilderness,
wetlands and other protected areas, and impose substantial liabilities for
pollution resulting from the Company's operations. Moreover, the recent trend
toward stricter standards in environmental legislation and regulation is
likely to continue. For instance, legislation has been proposed in Congress
from time to time that would reclassify certain crude oil and natural gas
exploration and production wastes as "hazardous wastes" which would make the
reclassified wastes subject to much more stringent handling, disposal and
clean-up requirements. If such legislation were to be enacted, it could have a
significant impact on the operating costs of the Company, and on the oil and
gas industry in general. Initiatives to further regulate the disposal of crude
oil and natural gas wastes are also pending in certain states, and these
various initiatives could have a similar impact on the Company. Management
believes that the Company is in substantial compliance with current applicable
environmental laws and regulations, but the Company's operations could
nevertheless result in liability for personal injuries, property damage, oil
spills, discharge of hazardous materials, remediation and clean-up costs and
other environmental damages. The Company could also be liable for
environmental damages caused by previous property owners. As a result,
substantial liabilities to third parties or governmental entities may be
incurred, the payment of which could have a material adverse effect on the
Company's financial condition and results of operations. The Company maintains
insurance coverage for its operations, including coverage for sudden
environmental damages, but does not believe that insurance coverage for
environmental damages that occur over time is or will be available at a
reasonable cost. Moreover, the Company does not believe that insurance
coverage against the full potential liability that could be caused by sudden
environmental damages is available at a reasonable cost. Accordingly, the
Company may be subject to liability against which it cannot fully insure, but
which could have a material adverse effect on the Company. Oil and gas
operations are subject to extensive governmental regulation, which may be
changed from time to time in response to economic or political conditions. The
Oil Pollution Act of 1990 imposes a variety of regulations on "responsible
parties" related to the prevention of oil spills. The implementation of new or
the modification of existing environmental laws or regulations, including
regulations promulgated pursuant to the Oil Pollution Act of 1990, could have
a material adverse impact on the Company. See "Business and Properties of the
Company--Regulation."
 
FORWARD-LOOKING STATEMENTS
 
  Stockholders are cautioned that all forward-looking statements involve risks
and uncertainties, including without limitation, statements about the costs of
exploring and developing new oil and natural gas reserves, the price for which
such reserves can be sold, the Company's attempts to reduce overhead and
eliminate non-core assets, environmental concerns affecting the drilling of
oil and natural gas wells, the effect of the Merger if consummated and general
market conditions, competition and pricing. Although the Company believes that
the assumptions underlying the forward-looking statements contained herein are
reasonable, any of the assumptions could be inaccurate, and there can
therefore be no assurance that the forward-looking statements included in this
 
                                      21
<PAGE>
 
Proxy Statement/Prospectus will prove accurate. Because of the significant
uncertainties inherent in the forward-looking statements contained in this
Proxy Statement/Prospectus, the inclusion of such information should not be
regarded as a representation by the Company or any other person that the
objectives and plans of the Company will be achieved.
 
PRINCIPAL STOCKHOLDERS
   
  Messrs. Gerlich, Susskind and Scheiber, together with The AIF-Lion Group,
currently own directly and indirectly in the aggregate 42.0% of the Senior
Preferred Stock and upon consummation of the Merger will own 42.0% of the New
Common Stock. Accordingly, upon consummation of the Merger, these principal
stockholders will be able to exercise substantial influence over the election
of the directors of Sheridan and the management, operations and affairs of
Sheridan, including the ability to exercise substantial influence to prevent
or cause a change in control of Sheridan. These principal stockholders do not,
however, constitute a "group" under Rule 13d of the Exchange Act and have not
acted, nor have they indicated any intent to act, together in the voting of
such shares. Messrs. Gerlich, Susskind and Scheiber have indicated they intend
to vote FOR the Merger. See "Certain Stock Owned by Principal Stockholders and
Management."     
 
FINANCIAL REORGANIZATION
 
  The Company has undergone a financial reorganization under Chapter 11 of
Title 11 of the United States Bankruptcy Code and, although the Company
believes that consummation of the Merger will have a significantly beneficial
impact upon the finances of the Company, there can be no assurance that the
Company will not be compelled to reorganize under the protection of the United
States Bankruptcy Code in the future.
 
ABSENCE OF PUBLIC MARKET
   
  The TGX Senior Preferred Stock was listed on the Nasdaq in late 1996 and had
only one trade to date on such exchange and only infrequently in private
transactions. In recent years, the TGX Common Stock has traded sporadically.
Sheridan has been incorporated to accomplish the Merger, and there has
therefore been no established public market for the New Common Stock. Sheridan
has made application to list its Common Stock on the Nasdaq-Small Cap System,
but such application has not been acted upon and there is no assurance when,
if ever, such application will be acted upon favorably. Therefore, there can
be no assurance that an active trading market for the New Common Stock will
develop or be sustained. Accordingly, it is not unlikely that an investment in
the New Common Stock will be illiquid. To the extent an active trading market
develops, the market price of the New Common Stock could be subject to
significant fluctuations in response to variations in quarterly and yearly
operating results, the success of Sheridan's business strategy, general trends
in the oil and gas industry, competition, changes in federal regulations
affecting Sheridan or the oil and gas industry and other factors. In addition,
the stock market in recent years has experienced extreme price and volume
fluctuations that have often been unrelated or disproportionate to the
operating performance of affected companies. These broad fluctuations may
adversely affect the market price, if any, of the New Common Stock.     
 
NO ANTICIPATED DIVIDENDS
   
  The Company, and, upon consummation of the Merger, Sheridan, expects to
retain cash generated from future operations to support its cash needs and
does not anticipate the payment of any dividends on the Common Stock or the
New Common Stock for the foreseeable future. In addition, dividends or
distributions by TGX and Sheridan may be restricted by currently existing
credit facilities or future bank and institutional debt financing. See
"Management's Discussion and Analysis of Financial Condition and Results of
Operations." Upon consummation of the Merger, holders of the Senior Preferred
Stock will forfeit all accrued but unpaid dividends and upon conversion of the
Senior Preferred Stock into the New Common Stock such holders will lose all
dividend and liquidation preferences. See "Proposal 1--The Merger--The Merger
Agreement" below.     
 
 
                                      22
<PAGE>
 
PREFERRED STOCK
   
  The Board has, and the board of directors of Sheridan will have, the
authority to issue shares of preferred stock in one or more series and to fix
the rights and preferences of the shares of any such series without
shareholder approval. Any series of preferred stock is likely to be senior to
the Common Stock with respect to dividends, liquidation rights and possibly
voting rights. Neither the Company nor Sheridan have any present plans to
issue any preferred stock. See "Description of Sheridan Securities."     
 
                                      23
<PAGE>
 
                                 THE MEETINGS
 
SOLICITATION, VOTING AND REVOCABILITY OF PROXIES; DATE AND PLACE OF MEETINGS
   
  This Proxy Statement/Prospectus is being furnished to the holders of the
Common Stock and Preferred Stock in connection with the solicitation of
proxies by and on behalf of the boards of directors of TGX and Sheridan for
use at a special meeting of TGX stockholders to be held at the Four Seasons
Hotel, 1300 Lamar Street, Houston, Texas on June 12, 1997, 10:00 a.m. local
time and the Sheridan Special Meeting to be held immediately following the
effectiveness, if ever, of the Merger. In addition to solicitation by mail,
proxies may be solicited by directors, officers and employees of TGX in person
or by telephone, telegram or other means of communication. Such directors,
officers and employees will not receive any compensation in addition to their
regular salary, but may be reimbursed for reasonable out-of-pocket expenses in
connection with the solicitation. Arrangements will also be made with
custodians, nominees and fiduciaries, all of whom will be reimbursed for
reasonable expenses incurred in connection therewith.     
   
  All shares of Common Stock and Preferred Stock that are represented at the
Meeting by duly executed proxies will be voted in accordance with the
instructions indicated thereon. If the Merger is effected, proxies executed by
Sheridan Common Stockholders (currently holders of TGX Senior Preferred Stock)
will be voted in accordance with the instructions indicated thereon. If a duly
executed TGX proxy is submitted and no voting instructions are indicated
thereon, such proxy will be voted "FOR" adoption of the Merger Agreement, and
"FOR" the election of the Nominees as directors of TGX. A duly executed
Sheridan proxy which is submitted with no voting instructions will be voted
"FOR" the election of the Nominees as directors of Sheridan. "FOR" approval of
the Sheridan Flexible Incentive Plan.     
 
  The Board knows of no other matter to be presented at the Meeting, but if
any other matter is properly presented for consideration at the Meeting (or
any adjournments or postponements thereof), the persons named in the enclosed
form of proxy will have discretion to vote on such matters in accordance with
their best judgment.
   
  A holder of Common Stock or Preferred Stock may revoke a previously
submitted proxy at any time before its exercise at the applicable Meeting or
Sheridan Special Meeting by (i) filing with the corporate secretary at or
before the Meeting or the Sheridan Special Meeting a written revocation
bearing a later date or a duly executed later-dated proxy relating to the same
shares or (ii) attending the Meeting or Sheridan Special Meeting and voting in
person. Attendance at the Meeting or Sheridan Special Meeting will not in and
of itself constitute a revocation of a proxy. Any written revocation or later-
dated proxy should be delivered at the Meeting or Sheridan Special Meeting to
the corporate secretary of TGX or before the Meeting or Sheridan Special
Meeting to TGX at 222 Pennbright, Suite 200, Houston, Texas 77090, Attention:
Corporate Secretary.     
   
  SENIOR PREFERRED STOCKHOLDERS ARE REQUESTED TO MARK, DATE AND SIGN BOTH THE
TGX PROXY AND THE SHERIDAN PROXY.     
   
  Stockholders are requested to mark, date and sign the enclosed proxies and
return it promptly to TGX in the enclosed stamped, pre-addressed envelope.
Stockholders may vote in person at the Meeting or Sheridan Special Meeting or
Sheridan Special Meeting even if they have previously mailed a proxy.
STOCKHOLDERS SHOULD NOT SEND STOCK CERTIFICATES WITH THEIR PROXY CARDS.     
 
PURPOSES OF MEETING
   
  At the Meeting, the stockholders of TGX will consider and vote upon
proposals to adopt the Merger Agreement and to elect the TGX directors. At the
Sheridan Special Meeting, the Sheridan common stockholders will consider and
vote upon proposals to elect directors and to approve the Sheridan Flexible
Incentive Plan. At each of the Meeting or the Sheridan Special Meeting, the
Company or Sheridan will be authorized to transact such other business as may
properly come before the Meeting or Sheridan Special Meeting or any
adjournments or postponements thereof.     
 
 
                                      24
<PAGE>
 
RECORD DATE; STOCKHOLDERS ENTITLED TO VOTE
   
  The Board has fixed May 9, 1997 as the record date (the "Record Date") for
the determination of the stockholders of TGX and Sheridan entitled to notice
of and to vote at the Meeting or the Sheridan Special Meeting. Only holders of
record of Common Stock and Preferred Stock will be entitled to notice of and
to vote at the Meeting. The holders of the Senior Preferred Stock are entitled
to vote with the holders of the Old Preferred Stock and Common Stock as a
single class on any matter with respect to which such holders are entitled to
vote at the Meeting.     
 
  In accordance with the Amended Plan of Reorganization of TGX (see "Business
and Properties of the Company--Reorganization Proceeding") and the Amended and
Restated Certificate of Incorporation of TGX (the "TGX Certificate"), each
share of Old Preferred Stock and Common Stock is entitled to cast one vote per
share, exercisable in person or by properly executed proxy, with such votes in
the aggregate to constitute five percent of the total number of votes that may
be cast with respect to any matter on which the Common Stock, the Old
Preferred Stock and the Senior Preferred Stock are entitled to vote; the
holders of the Senior Preferred Stock are entitled to cast the remaining
ninety-five percent of the votes that may be cast at the Meeting. As of the
Record Date, there were 24,955,807 shares of Common Stock and 491,657 shares
of Old Preferred Stock outstanding and entitled to notice of and to vote at
the Meeting, and the holders thereof are entitled to cast a total of
25,447,464 votes, in person or by proxy, at the Meeting.
 
  The number of votes to which each share of the Senior Preferred Stock is
entitled to cast at the Meeting is calculated on the basis that the holders of
Common Stock and Old Preferred Stock are entitled to cast five percent of the
total vote, and the holders of the Senior Preferred Stock are entitled to cast
ninety-five percent of the total vote. Thus, because each share of Common
Stock and Old Preferred Stock is entitled to one vote, five percent of the
total votes to be cast is equal to the number of shares of Common Stock and
Old Preferred Stock entitled to vote or .05x = 25,447,464, where x = the total
votes to be cast. The total number of votes entitled to be cast by the holders
of the Senior Preferred Stock, Old Preferred Stock and Common Stock therefore
equals 508,949,280. The shares of Senior Preferred Stock are entitled to cast
ninety-five percent of the total votes to be cast or .95 of 508,949,280. Thus,
the shares of the Senior Preferred Stock are entitled to cast 483,501,816
votes with respect to matters to be addressed at the Meeting. As of the Record
Date, there were 8,678,571 shares of Senior Preferred Stock outstanding and
entitled to notice of and vote at the Meeting. Each record holder of a share
of Senior Preferred Stock is therefore entitled to cast 55.7121 votes per
share (rounded in accordance with the terms stated in the TGX Certificate),
and each record holder of a share of Old Preferred Stock and Common Stock is
entitled to cast one vote per share, exercisable in person or by properly
executed proxy, with respect to the election of directors, on the proposals to
adopt the Merger Agreement.
   
  If the Merger is approved, holders of TGX Senior Preferred Stock will become
holders of New Common Stock. Only holders of New Common Stock will be entitled
to vote for the members of the Sheridan board of directors, and to approve the
Sheridan Flexible Incentive Plan and the Sheridan Nonemployee Director Plan
and on each other matter properly submitted to a vote of the stockholders at
the Sheridan Special Meeting.     
   
  As of the Record Date, directors and executive officers of TGX and their
affiliates had the power to vote approximately 1,818,002 shares of Senior
Preferred Stock and, therefore, to cast a total of 101,284,708 votes, or
approximately 21.0% of the outstanding shares of Senior Preferred Stock and
19.9% of the total TGX votes eligible to be cast at the Meeting and 21.0% of
the Sheridan votes eligible to be cast at the Sheridan Special Meeting.     
   
  After the Merger is effective, if ever, holders of Sheridan Common Stock,
determined as of the Record Date, will be entitled to vote on those matters
coming before the Sheridan Special Meeting. Assuming effectiveness of the
Merger, as of the Record Date, 4,339,285 shares of Sheridan Common Stock would
be outstanding and eligible to vote at the Sheridan Special Meeting.     
 
 
                                      25
<PAGE>
 
QUORUM; VOTE REQUIRED
   
  The presence at the Meeting, in person or by properly executed proxy, of
holders of record of one-third of the shares of the Preferred Stock and Common
Stock outstanding as of the Record Date will constitute a quorum for the
transaction of business at the Meeting. The presence at the Sheridan Special
Meeting, in person or by properly executed proxy, of holders of record of a
majority of the shares of Sheridan Common Stock outstanding as of the Record
Date will constitute a quorum for the transaction of business at the Sheridan
Special Meeting.     
   
  Abstentions and broker non-votes are each included in the determination of
the number of shares present and voting for purposes of determining the
presence of a quorum. Each is tabulated separately. A proxy submitted by a
stockholder may indicate that all or a portion of the shares represented by
such proxy are not being voted by such stockholder with respect to a
particular matter. This may occur, for example, when a broker is not permitted
to vote stock held in street name on certain matters in the absence of
instructions from the beneficial owner of the stock. The shares subject to any
such proxy that are not being voted with respect to a particular matter (the
"Nonvoted Shares") will be treated as shares not present and entitled to vote
on such matter, although such shares may be considered present and entitled to
vote for other purposes and will count for purposes of determining the
presence of a quorum. Shares voted to abstain as to a particular matter will
not be considered Nonvoted Shares. Approval of each matter specified in the
notice of the meeting (other than the proposal to adopt the Merger Agreement)
requires the affirmative vote of a majority, or in the case of election of
directors a plurality, of the votes entitled to be cast by the holders of
shares of Common Stock and Preferred Stock for TGX matters and New Common
Stock for Sheridan matters present in person or by proxy and entitled to vote
on such matter. Accordingly, Nonvoted Shares with respect to such matters will
not affect the determination of whether such matters are approved or the
outcome of the election of directors. Approval of the proposal to adopt the
Merger Agreement requires the affirmative vote of a majority of the votes
which the holders of the outstanding TGX Common Stock and Preferred Stock are
entitled to cast. Thus, Nonvoted Shares with respect to the proposal to adopt
the Merger Agreement have the legal effect of votes against such proposal.
Because the proposal to adopt the Merger Agreement requires a majority of the
votes which holders of the outstanding stock are entitled to cast and the
proposals to approve the Sheridan Flexible Incentive Plan require a majority
of all votes cast on each proposal by stockholders present in person or by
proxy, ABSTENTIONS will have the same effect as a vote AGAINST the matter.
       
  The principal Senior Preferred Stockholders of the Company, who together
with the management of the Company (see "Certain Stock Owned by Principal
Stockholders and Management") own in the aggregate 48.5% of the Senior
Preferred Stock as of the Record Date and are entitled to cast 46.1% of the
votes represented by the outstanding securities of TGX as of the Record Date,
have indicated along with management that they intend to vote such shares to
elect Jonathan P. Carroll, Michael A. Gerlich, David H. Scheiber and Jeffrey
E. Susskind (the "Nominees") to the Board and to vote such shares in favor of
the adoption of the Merger Agreement. If the Merger is effected, they have
indicated their intent to vote their New Common Stock for the Nominees to be
elected to the Sheridan Board and in favor of approval of the Sheridan
Flexible Incentive Plan.     
 
                            PROPOSAL 1--THE MERGER
 
THE MERGER AGREEMENT
   
  The stockholders of TGX are being asked to consider and approve a proposal
to adopt the Merger Agreement attached hereto as Appendix "A" and incorporated
herein by reference. The Merger Agreement provides for the merger of TGX with
and into Sheridan, with Sheridan continuing as the surviving corporation.     
 
  Under the Merger Agreement, each outstanding share of Senior Preferred Stock
will be automatically converted into and become a right to receive one-half
share of New Common Stock, all rights with respect to accrued but unpaid
dividends will automatically cease and dividends will cease to accrue with
respect to shares of Senior Preferred Stock. Each share of Old Preferred Stock
and Common Stock will automatically be cancelled upon consummation of the
Merger. To the extent holders of the outstanding Old Preferred Stock and
Common
 
                                      26
<PAGE>
 
Stock exercise appraisal rights with respect to their shares pursuant to the
Delaware General Corporation Law, such shares will continue to be subject to
such rights, but will not be deemed to be outstanding.
 
  If the Merger Agreement is adopted by the stockholders and no action
restraining or prohibiting the Merger has been threatened, asserted or
instituted, TGX anticipates that the Merger will become effective following
the filing of a certificate of merger with the Secretary of State of Delaware.
The time of such effectiveness is referred to herein as the "Effective Time."
Such filing will be made as promptly as practicable after the Meeting. No
state or federal regulatory approvals are required in connection with the
consummation of the Merger.
 
BACKGROUND AND REASONS FOR THE MERGER
 
  TGX was organized in 1980, and TGX and/or its predecessors have been in the
oil and gas business since the early 1970's. In 1974, Paragon Resources, Inc.,
a predecessor of TGX, and Iroquois Gas Corporation, a predecessor of National
Fuel Gas Distribution Corporation, executed a contract (the "NFG Contract")
for the sale and purchase of natural gas. In 1983, a decision of the New York
Public Service Commission, under whose jurisdiction the intrastate purchases
of National Fuel Gas Distribution Corporation ("NFG") fell, disapproved
contracts including pricing terms such as the one contained in the NFG
Contract. A dispute arose between TGX and NFG regarding the validity of the
NFG Contract and the price to be paid pursuant to the NFG contract, and
litigation between NFG and TGX (the "NFG Litigation") was commenced in
November 1984 to determine such validity. See "Business and Properties of the
Company--NFG Litigation."
 
  On February 22, 1990, TGX filed a voluntary petition in the United States
Bankruptcy Court for the Western District of Louisiana (the "Bankruptcy
Court") for reorganization (the "Reorganization Proceeding") pursuant to
Chapter 11 of Title 11 of the United States Bankruptcy Code. During the
Reorganization Proceeding a plan of reorganization was negotiated and on
January 7, 1992, the Amended Plan of Reorganization (the "Reorganization
Plan") was confirmed by the Bankruptcy Court. The Bankruptcy Court's order of
substantial consummation of the Reorganization Plan became final and non-
appealable on October 2, 1992. Pursuant to the Reorganization Plan, the
Company's secured indebtedness was restructured, certain claims were paid in
cash and unsecured creditors received shares of Senior Preferred Stock in
satisfaction of their claims. See "Business and Properties of the Company--
Reorganization Proceeding."
 
  The NFG Litigation continued to develop throughout the Reorganization
Proceeding, and it was considered possible that a resolution of the NFG
Litigation occurring after confirmation and substantial consummation of the
Reorganization Plan might result in a payment to the Company sufficient,
either in and of itself or together with a portion (but not all) of the
Company's assets, to redeem the Senior Preferred Stock to be issued in
satisfaction of unsecured claims pursuant to the Reorganization Plan. If the
resolution of the NFG Litigation were to result in a payment sufficient to
redeem the Senior Preferred Stock, there would remain in the Company some
value for those who, before commencement of the Reorganization Proceeding,
held equity interests in the Company. Thus, the Reorganization Plan provided
that the holders of the Old Preferred Stock and the Common Stock would retain
their shares upon consummation of the Reorganization Plan. See "Business and
Properties of the Company--Reorganization Proceeding."
 
  Following substantial confirmation of the Reorganization Plan, the Company
was notified in 1993 that certain events of default had occurred and were
continuing under its restructured credit facility with the Bank of Montreal
("BMO"). The Company entered into a series of agreements with BMO and Bank One
pursuant to which the Company made a required payment to BMO from proceeds of
a sale of certain properties and a partial drawdown of a new credit facility
negotiated with Bank One, BMO released all of its liens on the Company's
properties except with respect to the NFG Litigation and $4,652,000 of the
outstanding debt was converted into a non-recourse note secured only by the
proceeds of the NFG Litigation. BMO assigned its rights, including the non-
recourse note, to a wholly-owned subsidiary, BMO Financial, Inc. ("BMOF"). See
"Business and Properties of the Company--Bank Indebtedness."
 
 
                                      27
<PAGE>
 
  The Company also renegotiated certain notes which had been given in
satisfaction of certain administrative claims in the Reorganization
Proceeding. As a result of the renegotiation, the Company made a cash payment
of $455,000, issued 151,518 shares of the Senior Preferred Stock and issued a
non-recourse note in the principal amount of $90,000 to be payable out of the
Company's share of the proceeds, if any, to be received from the NFG
Litigation. See "Business and Properties of the Company -Administrative
Claims" and "--Reorganization Proceeding."
 
  On April 12, 1996, TGX settled the NFG Litigation and received $7,200,000 as
a settlement payment and recognized a $7,100,000 net litigation settlement
gain after payment to a third party having an interest in the settlement. In
connection with the settlement, BMOF was paid $3,600,000 and the loan was
deemed paid in full. TGX recorded an extraordinary gain for debt forgiveness
of $1,831,000, net of income taxes of $37,000, in conjunction with the BMOF
final payment. TGX retained approximately $3,500,000 of the NFG Litigation
settlement payment after payments to BMOF and a third party.
 
  Pursuant to the Reorganization Plan, the Senior Preferred Stock is entitled
to cumulative dividends and is redeemable in an amount equal to its
liquidation preference of $10.00 per share and accrued but unpaid dividends.
The Senior Preferred Stock is required to be redeemed out of funds legally
available for such redemption on or before January 21, 2002. To the extent TGX
is unable to redeem all of the Senior Preferred Stock on or before such date,
it is required to redeem as many shares of the Senior Preferred Stock as it
has funds legally available for such redemption and to continue such
redemption after January 21, 2002 whenever it has funds legally available
until all of the Senior Preferred Stock is redeemed. No dividends have been
paid to the holders of the Senior Preferred Stock to date, and accrued but
unpaid dividends on the Senior Preferred Stock currently total approximately
$56,473,000. Together with the liquidation preference with respect to the
outstanding 8,678,571 shares of Senior Preferred Stock in the amount of
approximately $86,786,000, redemption of the Senior Preferred Stock would
require an aggregate payment of approximately $143,259,000.
   
  Neither the Company's book value, at December 31, 1996 of $11,050,000, nor
its revenues, considered either singly or together, are sufficient to redeem
even a majority of the Senior Preferred Stock in accordance with the terms set
forth in the Reorganization Plan. See "Business and Properties of the
Company--Properties"; "Selected Financial Data"; "Management's Discussion and
Analysis of Financial Condition and Results of Operations" and the Company's
Consolidated Financial Statements. Under these circumstances, neither the
Common Stock nor the Old Preferred Stock has any current value and cannot,
under any reasonably foreseeable circumstances, be expected to have any value
attributed to it in the future, based on the Company's existing and reasonably
foreseeable operations.     
 
  In determining the fairness of the transaction to the various classes of TGX
security holders, the Board of Directors reviewed: (i) the current market
price of the TGX Common Stock, which trades sporadically and whose most recent
price was $.01 per share, and the historical market price of TGX Common Stock
which was traded sporadically; (ii) the Company's net book value which equals
approximately $11,050,000 and which, as a result, did not provide any value
for classes of TGX Preferred Stock, other than TGX Senior Preferred Stock or
TGX Common Stock, since the redemption value of the TGX Senior Preferred
Stock, including accrued but unpaid dividends, is presently $143,259,000 and
the Senior Preferred Stock accumulates dividends at a rate of 10% compounded
annually; (iii) the going concern value of TGX estimated at approximately
$11,000,000 and; (iv) TGX's liquidation value, which ranged from $7,000,000 to
$8,000,000. The Board also considered the opinion of American Appraisal as to
the fairness of the transaction from a financial point of view.
 
  In reviewing the various factors, the Board did not give any special weight
to any one factor but determined, in considering each of the factors, that
only the TGX Senior Preferred Stock had any value. None of the potential
alternative transactions considered, or any of the other factors, indicated a
value in excess of the value or consideration offered to unaffiliated security
holders of TGX.
 
  The Board has analyzed various alternatives for enhancing stockholder value,
meeting the economic and industry demands faced by the Company, creating the
flexibility and liquidity that will be required for the future
 
                                      28
<PAGE>
 
stability and growth of the Company and advancing the Company's strategic
objectives. These alternatives included: selling common stock of TGX; merging
with one or more companies whereby TGX would receive a premium for its assets,
preferably with a company whose securities were publicly traded; conducting a
rights offering with its current security holders; obtaining additional debt
to be used to conduct operations; and liquidating. The Board did not believe
it was possible to sell additional equity securities; did not believe that
obtaining debt for the conduct of exploration activities was either viable or
the best utilization of the Company's assets; did not believe that a rights
offering to its securities holders would be successful or would justify the
transactional costs required thereby; did not believe that it could
successfully complete a merger which would provide a premium for the Company's
Senior Preferred shareholders nor provide any benefit to the Company's common
shareholders; and did not believe liquidation would provide the greatest
benefit for its Senior Preferred shareholders. In making its determination,
the Board reviewed certain proposals that it had considered and deemed
unacceptable, for the possible business combination with unaffiliated parties,
as well as informal discussions with regional investment banking firms
concerning the possible sale of equity securities. In each of these
alternatives, no value was to be ascribed to the TGX Preferred Stockholders
(other than Senior Preferred Stockholders) or the TGX Common Stockholders. To
enhance its opportunities as a viable business, the Company must eliminate its
obligations with respect to the Senior Preferred Stock and thereby be freed to
explore other opportunities for raising capital to conduct and increase the
profitability of its operations, but the Company's existing assets and cash
flow are not sufficient both to redeem the Senior Preferred Stock, even in
part, and to continue the Company's operations. If the Merger is not approved,
the Company may be unable to compete successfully in obtaining additional
resources needed to continue its operations. AFTER CAREFUL CONSIDERATION AND
THE RECEIPT OF THE OPINION OF THE FINANCIAL ADVISOR, THE BOARD HAS DETERMINED
THAT THE MERGER IS ADVISABLE AND IN THE BEST INTERESTS OF THE STOCKHOLDERS OF
TGX.
 
RECOMMENDATION OF BOARD
 
  THE BOARD HAS UNANIMOUSLY ADOPTED THE MERGER AGREEMENT AND BELIEVES THAT ITS
ADOPTION IS IN THE BEST INTERESTS OF TGX AND ITS STOCKHOLDERS. ACCORDINGLY,
THE BOARD UNANIMOUSLY RECOMMENDS THAT THE STOCKHOLDERS VOTE "FOR" ADOPTION OF
THE MERGER AGREEMENT. The members of the Board, Messrs. Gerlich, Scheiber and
Susskind, together hold 21.0% of the outstanding Senior Preferred Stock (see
"Certain Stock Owned by Principal Stockholders and Management") and will,
therefore, be entitled to receive 21.0% of the New Common Stock upon
consummation of the Merger if the Merger Agreement is adopted.
 
OPINION OF APPRAISAL AND VALUATION FIRM
 
  American Appraisal was engaged by TGX pursuant to the Engagement Letter to
act as its financial adviser in connection with the Merger. In connection with
such engagement, TGX requested American Appraisal to render an opinion as to
the fairness, from a financial point of view, of the Merger to TGX
Stockholders.
 
  American Appraisal is an internationally recognized firm engaged in the
valuation of businesses and securities in connection with mergers and
acquisitions, private placements, and evaluations for estate, corporate and
other purposes. TGX's Board of Directors selected American Appraisal as its
financial adviser because of their expertise, reputation and familiarity with
the oil and gas industry.
 
  Pursuant to the terms of the Engagement Letter, American Appraisal was paid
a $10,000 retainer and, upon consummation of the Merger, will be entitled to
an additional fee from TGX of $20,000 plus out-of-pocket and other expenses.
TGX has also agreed to indemnify American Appraisal against certain
liabilities, including liabilities under the federal securities laws, and, if
the Merger is not consummated, to reimburse American Appraisal for reasonable
expenses incurred by them, including reasonable fees and disbursements of
their counsel.
 
  On August 22, 1996, in connection with the valuation of the Merger by TGX's
Board of Directors, American Appraisal rendered its oral opinion, subsequently
confirmed in writing, that, as of the date of such
 
                                      29
<PAGE>
 
opinion, and subject to certain assumptions, factors and limitations set forth
in such written opinion, the consideration to be received by the Stockholders
of TGX was fair, from a financial point of view. American Appraisal
reconfirmed its opinion as of March 21, 1997.
 
  The full text of the American Appraisal opinion, which sets forth the
assumptions made, general procedures followed, other matters considered, and
the limitations on the review undertaken in writing such opinion, is included
as Appendix "D" to this Proxy Statement/Prospectus.
 
  American Appraisal's opinion addresses only the fairness of the terms of the
Merger, from a financial point of view, to the Stockholders of TGX and does
not constitute a recommendation to any TGX stockholder as to how to vote with
respect to the Merger.
 
  In the course of rendering its opinion, American Appraisal, among other
things:
 
  (i)   reviewed and analyzed historical operating and financial information of
        TGX from (1) Forms 10-K and 10-KSB for TGX for the years ended December
        31, 1991 through 1996, and unaudited financial statements for the
        period ended January 31, 1997, (2) Amendment No. 2 to Form S-4
        Registration Statement filed January 6, 1997 with the SEC, and (3)
        certain other publicly available financial and operating information
        relating to TGX;
 
  (ii)  reviewed and analyzed the historical trading volume and public market
        prices of the Common Stock, and a private sale of the Senior Preferred
        Stock;
 
  (iii) reviewed market capitalizations, price to earnings ratios and other
        valuation measurements of publicly held companies, whose lines of
        business were comparable to those of TGX;
     
  (iv)  held discussions with TGX senior management regarding (1) TGX's
        operating history, financial condition, business outlook and business
        strategy prior to the Merger and after the Merger as part of Sheridan's
        consolidated company; (2) TGX's need to raise capital in order to ensure
        its ability to continue operating as a going concern and to achieve its
        long term business goals, (3) TGX's need to recapitalize and eliminate
        the Senior Preferred redemption liability in order to raise capital and
        (4) the financial benefits of the Merger to the Senior Preferred Stock
        shareholders, including the improved liquidity to be gained from the
        ownership of New Common Stock; and
           
  (v)   performed other financial studies, analyses and investigations and
        other factors as were deemed necessary and appropriate for purposes of
        the opinion expressed herein.
 
  As part of its study, American Appraisal valued the Preferred Stock and
Common Stock as of July 31, 1996. This valuation study was comprised of (i) a
present value analysis of the future net operating cash flow potential of the
Company's current oil and gas reserves, (ii) a study of the market prices of
publicly held companies and transaction prices of acquired companies, whose
lines of business are comparable to that of TGX and (iii) an analysis of the
public market price for TGX's publicly traded Common Stock and the terms of a
private sale of Senior Preferred Stock.
 
 Discounted Net Cash Flow Analysis
 
  Based on Company management-prepared projections for fiscal years 1996 and
1997 and a discount rate of 16.20%, American Appraisal estimated that the
present value of the Company's future net operating cash flow ranged from
$18,000,000 to $19,000,000.
 
 Net Asset Value Analysis
 
  The Company's balance sheet was restated to reflect current market value of
its assets and liabilities, such estimates provided by American Appraisal and
management (the latter provided an estimate of value for the Comite Field
Plant Venture and Gathering Systems). Based on this analysis, the net asset
value of the Company's Senior Preferred Stock ranged from $18,000,000 to
$19,000,000 and the Common Stock and the Old Preferred had no value.
 
 
                                      30
<PAGE>
 
 Liquidation Value Analysis
 
  American Appraisal restated TGX's balance sheet to reflect liquidation value
of assets and liabilities. Discounts were applied to the market values to
account for the negative impact on value of assets and liabilities attributed
to conditions surrounding the cessation of the Company's business operations
and subsequent liquidation of its assets and payment of liabilities. The
results of this analysis indicated that the liquidation value of the Senior
Preferred Stock ranged from $12,000,000 to $13,000,000 and the Common Stock
had no value.
 
 Comparable Company and Acquisition Study
 
  For the purpose of comparing operating and financial performance from a
valuation point of view, American Appraisal analyzed seven publicly held
companies whose lines of business are comparable to those of TGX and five
public or private companies whose lines of business were also comparable to
TGX but had been acquired or merged with other companies prior to the date
hereof. The selected publicly held companies were Agraxas Petroleum Corp.,
Amerac Energy Corp., Basic Earth Science Systems, Inc., Hallador Petroleum
Co., Middle Bay Oil Co., Inc., Midland Resources, Inc. and National Energy
Group, Inc. The selected acquired or merged companies were Brock Exploration
Corp., Plains Petroleum Co., Red Eagle Resources Corp., Sansum Energy Co., LP
and Tide West Oil Co. Based on this analysis, American Appraisal estimated
that the total value of the Company's stockholders' equity ranged from
$26,000,000 to $30,000,000 and the Common Stock had no value.
 
 Public Market Price of Common and Preferred Stock
 
  In the opinion of American Appraisal, the absence of meaningful stock price
quotations and trading activity of the Common Stock to a large extent
reflected (i) TGX's continued operating losses, (ii) the low probability of
any growth in earnings over the long term under the Company's current capital
structure and (ii) the extreme improbability of TGX's ability to redeem the
Senior Preferred Stock for any value greater than the estimated current net
asset value of the Company's total stockholders' equity (such value
representing approximately 13% to 14% of the current face value of the
Preferred Stock).
 
  American Appraisal's financial and valuation analysis resulted in the
following conclusions that affected the fairness of the Merger to the holders
of the Preferred Stock and the market value of the Common Stock:
 
  (i)   Removal of the Senior Preferred Stock redemption liability will ensure
        the Company's ability to continue to operate as a going concern over
        the long term and enhance its near and long term growth potential;
 
  (ii)  The redemption value of the Senior Preferred Stock is no greater than
        the net asset value of the Company, an amount that is currently
        substantially below the amount of the redemption liability and is not
        expected to materially change over the long term;
 
  (iii) The senior preference position of the Senior Preferred Stock will, to
        a large extent, be matched by the New Common Stock after the Merger.
 
  (iv)  The other TGX Preferred Stock and the Common Stock each has no current
        market value because of the senior position of the redemption
        liability and is not expected to have any market value over the long
        term.
 
  (v)   The New Common Stock will provide greater liquidity to the holders of
        the Senior Preferred Stock;
 
  In connection with its review, American Appraisal assumed and relied upon
the accuracy and completeness of the financial and other information used by
it in arriving at its opinion, without independent verification, and American
Appraisal did not assume any responsibility to independently verify any of
such information. American Appraisal further relied upon the assurances of the
TGX management that such management was not aware of any facts that would make
such information inaccurate or misleading in any material respect. American
Appraisal also relied upon the information provided by TGX's management
concerning the business, operations and strategic benefits and implications of
the Merger. American Appraisal assumed that the information concerning
 
                                      31
<PAGE>
 
   
the prospects of TGX was reasonably prepared on bases reflecting the best
available estimates and judgments of such management as to the likely future
financial performance of TGX. American Appraisal expressed no view as to such
information or the assumptions on which it was based. American Appraisal did
not conduct any physical inspections of the properties or facilities of TGX
and did not make or obtain or assume any responsibility for making or
obtaining any valuation or appraisals of the assets or liabilities of TGX.
American Appraisal's opinion was based upon market, economic and other
conditions, as they existed, and could be evaluated as of the date of such
opinion. American Appraisal's opinion does not constitute an opinion or imply
any conclusion as to the likely trading range for Sheridan's Common Stock
following consummation of the Merger. American Appraisal's opinion also does
not address the underlying business decision to effect the Merger or
constitute a recommendation to any TGX stockholder as to how to vote with
respect to the Merger.     
 
  The preparation of a fairness opinion involves various determinations as to
the most appropriate and relevant method of financial analysis and the
application of those methods to the particular circumstances, and therefore
such an opinion is not readily susceptible to summary description.
Furthermore, in arriving at its opinions, American Appraisal did not attribute
any particular weight to any analysis or factor considered by it, but rather
made qualitative judgments as to the significance and relevance of each
analysis and factor. Accordingly, American Appraisal believes that its
analyses must be considered as a whole and that considering any portion of
such analyses and other factors considered, without considering all analyses
and factors, could create a misleading or incomplete view of the process
underlying its opinion. In its analyses, American Appraisal made numerous
assumptions with respect to industry performance, general business and
economic conditions and other matters, many of which are beyond the control of
TGX. Any estimates contained in the American Appraisal analyses are not
necessarily indicative of actual values or predictive of future results or
values, which may be significantly more or less favorable than as set forth
therein.
 
CONDITIONS TO MERGER
   
  The obligations of the Company and Sheridan to consummate the Merger are
subject to the adoption of the Merger Agreement by the holders of the Senior
Preferred Stock, the Old Preferred Stock and the Common Stock. In addition,
the Company and Sheridan are not required to consummate the Merger if any
action or proceeding by any governmental body or agency has been threatened,
asserted or instituted to restrain or prohibit the transactions contemplated
by the Merger Agreement.     
 
EXCHANGE OF CERTIFICATES
 
  After the Effective Time, each record holder at the Effective Time of a
certificate or certificates theretofore representing shares of issued and
outstanding Senior Preferred Stock will be provided with instructions and a
letter of transmittal relating to the exchange of certificates and will be
entitled, upon the surrender of such certificate or certificates to American
Stock Transfer & Trust Company (the "Exchange Agent"), promptly to receive in
exchange therefor a certificate or certificates representing the number of
whole shares of New Common Stock into which the shares of Senior Preferred
Stock previously represented by the certificate or certificates so surrendered
shall have been automatically converted. From and after the Effective Time,
until surrendered, each certificate theretofore representing shares of Senior
Preferred Stock will be deemed for all corporate purposes, other than payment
of dividends, to evidence the ownership of the number of whole shares of New
Common Stock into which such shares of Senior Preferred Stock shall have been
converted. Unless and until any such certificates shall be so surrendered, the
holder of such certificates will not be entitled to receive payment of any
dividends on such shares of New Common Stock payable to the holders thereof
after the Effective Time. Upon the surrender of certificates previously
representing shares of Senior Preferred Stock, the holder thereof will receive
certificates representing the number of whole shares of New Common Stock to
which such holder shall be entitled and the amount of any dividends or other
distributions that shall have been payable to holders of record of New Common
Stock on or after the Effective Time with respect to such shares of New Common
Stock, without interest. No fractional shares of New Common Stock will be
issued upon consummation of the Merger. The Board of Directors has determined
that fractional shares will be paid for at the rate of $2.52 per share, the
 
                                      32
<PAGE>
 
   
estimated fair value for the New Common Stock based on the Board's estimate of
the Senior Preferred Stock's fair value. Since there was no trading in the
Senior Preferred Stock prior to the Merger, the Board estimated a fair value
by dividing the book value of the Company by the number of shares of Sheridan
Common Stock to be outstanding after the Merger is consummated. On this basis,
the Board came to the conclusion that a reasonable estimate of value would be
$2.52 per share of Sheridan. American Appraisal, reviewing the terms of this
offering, has concluded that the Board's approach to this estimate is
reasonable. All shares of New Common Stock into which shares of Senior
Preferred Stock shall have been converted pursuant to the Merger will be
deemed to be validly issued, fully paid and nonassessable and to have been
issued in full satisfaction of all rights pertaining to such shares of Senior
Preferred Stock.     
 
INTERESTS OF CERTAIN PERSONS IN THE MERGER
 
  Prior to the Merger, Mr. Jeffrey E. Susskind, a member of the Board of
Directors, held approximately 1,778,002 shares of Senior Preferred Stock, or
20.5% of the outstanding Senior Preferred Stock. As a result, Messr. Susskind
may be deemed to have a conflict of interest in recommending that the Merger
be consummated.
 
CERTAIN FEDERAL INCOME TAX CONSIDERATIONS
   
  The following discussion summarizes the material Federal income tax
considerations of the Merger that are applicable to TGX or Sheridan or are
generally applicable to holders of TGX stock. This discussion is based on
currently existing provisions of the Internal Revenue Code of 1986, as amended
(the "Code"), existing and proposed Treasury Regulations promulgated
thereunder, and current administrative rulings and court decisions, all of
which are subject to change. Any such change, which may or may not be
retroactive, could alter the tax consequences to TGX, Sheridan, or the
stockholders of TGX as described herein and adversely impact TGX, Sheridan, or
the stockholders of TGX.     
 
  The stockholders of TGX should be aware that this discussion does not deal
with all Federal income tax considerations that may be relevant to particular
stockholders of TGX in light of their particular circumstances, such as
stockholders who are dealers in securities, stockholders who are subject to
the alternative minimum tax provisions of the Code, foreign persons, and
stockholders who acquired their shares in compensatory transactions. In
addition, the following discussion does not address the tax consequences of
the Merger under foreign, state, or local tax laws or the tax consequences of
transactions effectuated prior to or after the Merger (whether or not such
transactions are in connection with the Merger). STOCKHOLDERS OF TGX ARE URGED
TO CONSULT THEIR OWN TAX ADVISORS AS TO THE SPECIFIC CONSEQUENCES OF THE
MERGER AND ANY RELATED TRANSACTIONS, INCLUDING THE APPLICABLE FEDERAL, STATE,
LOCAL, AND FOREIGN TAX CONSEQUENCES TO THEM OF THE MERGER AND ANY RELATED
TRANSACTIONS IN THEIR PARTICULAR CIRCUMSTANCES.
   
  The discussion below summarizes the Federal income tax consequences if the
Merger qualifies as a tax-free reorganization. Management of the Company
believes that the Merger will qualify as a tax-free reorganization, but
neither TGX nor Sheridan has requested a ruling from the Internal Revenue
Service (the "IRS") with regard to any of the Federal income tax consequences
of the Merger or any related transactions, including particularly as to
whether the Merger will qualify as a tax-free reorganization under Section
368(a) of the Code (a "Reorganization"). No assurance can be given that the
IRS would concur in this conclusion or that this conclusion would be sustained
by a court if contested by the IRS.     
 
  A successful IRS challenge to the Reorganization status of the Merger would
result in each holder of TGX Senior Preferred Stock recognizing gain or loss
with respect to each share of TGX Senior Preferred Stock surrendered equal to
the difference between the stockholder's basis in such share and the fair
market value, as of
 
                                      33
<PAGE>
 
   
the Effective Time, of the Sheridan Common Stock received in exchange
therefor. In such event, the stockholders' aggregate basis in the Sheridan
Common Stock so received would equal its fair market value, and the
stockholders' holding period for such stock would begin the day after the
Merger.     
   
  Subject to the limitations and qualifications referred to herein,
qualification of the Merger as a Reorganization will generally result in the
following consequences: (a) no gain or loss will be recognized by the holders
of TGX Senior Preferred Stock upon the receipt of Sheridan Common Stock solely
in exchange for such TGX Senior Preferred Stock in the Merger (except to the
extent of cash received as a result of exercising dissenters' or appraisal
rights or in receipt for fractional shares); (b) the aggregate tax basis of
the Sheridan Common Stock so received by the holders of TGX Senior Preferred
Stock in the Merger will be the same as the aggregate tax basis of the TGX
Senior Preferred Stock surrendered in exchange therefor; (c) the holding
period of the Sheridan Common Stock so received in the Merger will include the
holding period of the TGX Senior Preferred Stock surrendered therefor,
provided that the TGX Senior Preferred Stock so surrendered is held as a
capital asset at the time of the Merger; (d) a stockholder of TGX who
exercises appraisal or dissenters' rights or receives cash in lieu of
fractional shares under any applicable law with respect to shares of TGX stock
and receives payment for such shares in cash will recognize gain or loss
measured by the difference between the amount of cash received and the
stockholder's basis in such shares; (e) holders of TGX Common Stock and Old
Preferred Stock will realize a capital loss upon cancellation of such shares
in the Merger equal to their respective basis, if any, in such shares; and (f)
neither TGX nor Sheridan will recognize gain solely as a result of the Merger.
    
ACCOUNTING TREATMENT
   
  The Merger will be recorded as a reorganization of related parties with
carry-over basis of assets and liabilities. The Sheridan Common Stock will be
recorded at the historical-basis carrying value of the aggregate of TGX's
Preferred Stock, Common Stock and the initial value ascribed to the Senior
Preferred Stock upon their issuance, as reflected in TGX's accounting records
on the date of the exchange. Accordingly, upon cancellation, all previously
recorded Preferred Stock dividends and accretion will be credited to
accumulated deficit. No gain or loss will be recognized for accounting
purposes upon consummation of the Merger. The costs of soliciting proxies and
effecting the Merger will be charged to expense as incurred.     
 
APPRAISAL RIGHTS
 
  General. Under Section 262 of the Delaware General Corporation Law, if the
Merger Agreement is adopted and the Merger consummated, holders of the
Preferred Stock who exercise their appraisal rights in accordance with Section
262 will be entitled to an appraisal by the Delaware Court of Chancery of the
fair value of such holder's shares and payment therefor in accordance with
such determination. Delaware law does not provide for appraisal rights where
stock is held by more than 2,000 stockholders of record. TGX's Common Stock
was held by approximately 4,000 stockholders of record on the Record Date. The
following brief summary of Section 262 summarizes the procedures for demanding
statutory appraisal rights. This summary is qualified in its entirety by
reference to Section 262, a copy of the text of which is attached to this
Proxy Statement/Prospectus as Appendix "E". Any element of value arising from
the accomplishment or expectation of the Merger is excluded from the
determination of fair value. Reference herein to "appraisal rights" is a
general reference to a stockholder's right to obtain appraisal of the
stockholder's shares in accordance with Section 262. The Board of Directors
have determined that if holders of more than 10% of the Senior Preferred Stock
demand appraisal rights, they will not proceed with the Merger.
 
  Who May Demand Appraisal. Each record holder of Preferred Stock may demand
appraisal and obtain payment of the fair value of such holder's shares by
following the procedures provided in Section 262 and summarized here. A
beneficial holder of Preferred Stock may demand appraisal as to the shares
held on the beneficial holder's behalf (i) if TGX receives the written consent
of the record holder of such shares to such demand for appraisal not later
than the time the beneficial holder demands appraisal rights or (ii) by
causing the
 
                                      34
<PAGE>
 
record holder to demand appraisal with respect to such shares. In each such
case, the procedures provided in Section 262 and summarized below must be
followed.
   
  Procedures. Each holder electing to demand appraisal rights must deliver to
TGX, before the taking of the vote on the Merger, a written demand for
appraisal of such holder's shares, specifying the identity of the holder and
that the holder intends by such demand to demand appraisal of such holder's
shares. A proxy or vote against the Merger does not constitute a demand for
appraisal. Within ten days after the Effective Time, Sheridan will notify each
holder who has demanded appraisal rights and has not voted in favor of or
consented to the Merger that the Merger has become effective. A written demand
for appraisal may be withdrawn and the terms of the Merger accepted at any
time within sixty days after the Effective Time, but thereafter such demand
may be withdrawn only with the written approval of Sheridan. Within 120 days
after the Effective Time, the holder upon written request is entitled to
receive from Sheridan within ten days of such request a statement setting
forth the aggregate number of shares not voted in favor of the Merger and with
respect to which demands for appraisal have been received and the aggregate
number of holders of such shares. Any holder who has complied with the
requirements of Section 262 may, within 120 days after the Effective Time,
file a petition, with service of a copy thereof on Sheridan, in the Delaware
Court of Chancery (the "Court") demanding a determination of the value of the
stock of all holders who demanded appraisal rights.     
 
  Court Proceedings. The Court will then conduct proceedings to determine the
holders entitled to appraisal rights and may require holders who have demanded
an appraisal and who hold stock represented by certificates to submit their
certificates to the Court for notation thereon of the pendency of the
appraisal proceedings. If any holder fails to comply, the Court may dismiss
the proceedings as to such holder. The Court will then appraise the shares,
taking into account all relevant factors. The Court in its discretion may,
upon application of any party to the proceeding, permit discovery or other
pretrial proceedings and proceed to trial upon the appraisal before a final
determination of the holder entitled to an appraisal. The Court may determine
all costs of the proceeding and may assess those costs on the parties as the
Court deems equitable in the circumstances. The Court may also, upon
application of a holder, order all or a portion of the expenses incurred by
such holder in connection with the appraisal proceeding to be charged pro rata
against the value of all the shares entitled to an appraisal.
   
  If no petition for appraisal is filed with the Court within 120 days after
the Effective Time, or if a holder, within sixty days after the Effective Time
or subsequent to such period with the written approval of Sheridan, delivers
to Sheridan a written withdrawal of such holder's demand for an appraisal and
an acceptance of the Merger, then the right of such holder to an appraisal
ceases. No appraisal proceeding, once instituted, may be dismissed as to any
holder without the approval of the Court, which may be conditioned on such
terms as the Court deems just.     
                       
                    DESCRIPTION OF SHERIDAN SECURITIES     
 
COMMON STOCK
   
  General. Sheridan is currently authorized to issue 20,000,000 shares of
common stock, par value $.01 per share (as defined above, the "New Common
Stock"). No shares of New Common Stock will be issued before consummation of
the Merger. Shares of New Common Stock issued upon consummation of the Merger
will be fully paid and non-assessable.     
   
  Dividend Rights. The holders of New Common Stock are entitled to receive,
when and as declared by the Board of Directors of Sheridan (the "Sheridan
Board"), out of the assets of Sheridan that are by law available therefor,
dividends payable either in cash, in property or in shares of stock, subject
to all rights of the New Preferred Stock (as defined below).     
   
  Voting Rights. Each holder of New Common Stock is entitled to one vote, in
person or by proxy, for each share of New Common Stock standing in the name of
such holder on the books of Sheridan. Holders of shares of New Common Stock
have noncumulative voting rights, which means that the holders of more than
50% of     
 
                                      35
<PAGE>
 
the shares voting for the election of directors can elect all of the
directors, and in such event the holders of the remaining shares voting for
the election of directors will not be able to elect any directors. Except as
otherwise provided by law and subject to the voting rights conferred on New
Preferred Stock, if any, in any case where the holders of New Preferred Stock
possess voting rights, the New Common Stock and the New Preferred Stock vote
together as one class.
   
  Rights upon Liquidation.  Upon any dissolution, liquidation or winding up of
the affairs of Sheridan, either voluntarily or involuntarily, the holders of
the New Common Stock are entitled, after payment or provision for payment of
the debts and other liabilities of Sheridan and after payment in full to the
holders of New Preferred Stock, if any, to share ratably in the remaining
assets and funds of Sheridan.     
   
  Miscellaneous. Holders of shares of the New Common Stock are not entitled to
preemptive rights. Shares of the New Common Stock are not convertible into the
shares of any other class of capital stock of Sheridan.     
 
PREFERRED STOCK
   
  Sheridan is authorized to issue 5,000,000 shares of preferred stock, $1.00
par value per share (the "New Preferred Stock"). No shares of New Preferred
Stock are currently outstanding or are contemplated being issued at the
current time. The Sheridan Board is authorized to fix for each class or series
of preferred stock issued such voting powers, full or limited, or no voting
powers, and such distinctive designations, preferences and relative,
participating, optional or other special rights and such qualifications,
limitations or restrictions thereof as are stated in the resolution or
resolutions adopted by the Sheridan Board providing for the issuance of such
class or series and as may be permitted by the General Corporation Law of
Delaware, including without limitation the authority to provide that any such
class or series may be (i) subject to redemption at such time or times and at
such price or prices; (ii) entitled to receive cumulative or non-cumulative
dividends at such rates, on such conditions and at such times, and payable in
preference to, or in such relation to, the dividends payable on any other
class or classes or any other series; (iii) entitled to such rights upon the
dissolution of, or upon any distribution of the assets of, Sheridan; or (iv)
convertible into, or exchangeable for, shares of any other class or classes of
stock, or of any other series of the same or any other class or classes of
stock, of Sheridan at such price or prices or at such rates of exchange and
with such adjustments; all as may be stated in such resolution or resolutions
issuing the class or series of New Preferred Stock. The Sheridan Board has not
designated any series of New Preferred Stock and does not presently
contemplate the issuance of shares of New Preferred Stock.     
 
                      COMPARATIVE RIGHTS OF STOCKHOLDERS
 
GENERAL
   
  At the Effective Time, the holders of the Senior Preferred Stock of TGX will
become the holders of the New Common Stock of Sheridan. At such time holders
of TGX Common Stock will have rights associated with prior TGX Common Stock
ownership eliminated. The rights of the stockholders of both TGX and Sheridan
are governed by and subject to the provisions of the Delaware General
Corporation Law; the rights of holders of the Senior Preferred Stock, governed
before consummation of the Merger by the TGX Certificate and the Amended and
Restated Bylaws of TGX (the "TGX Bylaws"), will after consummation of the
Merger, as the holders of the New Common Stock, be governed by the Sheridan
Certificate and the Sheridan Bylaws. The following discussion summarizes the
material differences between the rights of holders of the Senior Preferred
Stock of TGX and holders of the New Common Stock of Sheridan, based on a
comparison of the TGX Certificate, the TGX Bylaws, the Sheridan Certificate
and the Sheridan Bylaws. For additional information regarding the specific
rights of holders of the New Common Stock, see "Description of New Common
Stock" above. This summary does not purport to be complete and is qualified in
its entirety by reference to the Delaware General Corporation Law, the TGX
Certificate, the TGX Bylaws, the Sheridan Certificate and the Sheridan Bylaws.
However, the summary accurately describes the material terms of the capital
stock and the provisions of Sheridan's Charter and Bylaws. Except as provided
below, the relevant provisions of the Sheridan Certificate and the Sheridan
    
                                      36
<PAGE>
 
   
Bylaws are substantially similar to those of the TGX Certificate and the TGX
Bylaws. For holders of TGX Common Stock the following paragraphs do not
reflect comparative rights since their interests will be eliminated and they
will have no on-going interest in Sheridan.     
 
DIVIDENDS
   
  Each share of New Common Stock is entitled to participate equally in
dividends when, as and if declared by the Sheridan Board, subject to the
rights of any New Preferred Stock then outstanding. Shares of New Common Stock
do not have any preference rights in the payment of dividends.     
 
  Holders of the Senior Preferred Stock are entitled to receive cumulative
dividends at a rate per share of ten percent (10%) per year of such share's
liquidation preference of $10.00. The holders of the Senior Preferred Stock
are entitled to receive all accrued but unpaid dividends with respect to such
shares before any dividends may be paid or set apart with respect to the Old
Preferred Stock or Common Stock.
 
VOTING RIGHTS
 
  Each share of New Common Stock is entitled to one vote on all matters on
which holders are entitled to vote under the Delaware General Corporation Law.
Holders of shares of New Common Stock do not have any cumulative rights.
   
  Holders of the Senior Preferred Stock have sufficient votes per share to
exercise 95% of the voting power of the outstanding voting securities of TGX.
Upon consummation of the Merger, holders of the Senior Preferred Stock will
hold 100% of the New Common Stock and thus exercise 100% of the voting power
of the then outstanding voting securities of Sheridan.     
 
AMENDMENT
 
  Any amendment, alteration or repeal of the statement of designation in the
TGX Certificate creating the Senior Preferred Stock that adversely affects the
preferences, special rights or powers of the holders of the Senior Preferred
Stock requires the consent of the holders of a majority of the Senior
Preferred Stock. Holders of the Senior Preferred Stock will, upon consummation
of the Merger, no longer have any rights to vote separately as a class of
Senior Preferred Stock, but will become the holders of a single class of
stock, the New Common Stock.
 
REDEMPTION/CONVERSION
 
  The holders of the New Common Stock will not have any redemption rights or
any conversion rights. The holders of the Senior Preferred Stock will be
entitled to have their shares redeemed, on or before January 21, 2002 or as
soon thereafter as sufficient capital is legally available therefor to TGX, at
a price per share equal to the liquidation preference of $10.00, together with
all accrued but unpaid dividends thereon to the date of redemption.
 
LIQUIDATION
   
  Upon any liquidation, dissolution or winding up of the affairs of Sheridan,
whether voluntary or involuntary, the holders of the New Common Stock are
entitled to participate equally in the distribution of assets of Sheridan,
after payment of liabilities and liquidation preferences of any outstanding
shares of New Preferred Stock.     
 
  Upon any liquidation, dissolution or winding up of the affairs of TGX,
whether voluntary or involuntary, the holders of the Senior Preferred Stock
are entitled to be paid the liquidation preference of $10.00 for each share of
the Senior Preferred Stock held by them, together with all accrued but unpaid
dividends thereon, before any distribution or payment may be made or set apart
for the holders of the Old Preferred Stock or Common Stock.
 
                                      37
<PAGE>
 
UNISSUED SHARES
   
  The Sheridan Board is authorized, without action of its stockholders, to
issue up to 20,000,000 shares of New Common Stock, 4,339,285 of which will be
issued upon consummation of the Merger if the Merger Agreement is approved,
and up to 5,000,000 shares of New Preferred Stock in one or more series. The
Sheridan Board is authorized to fix the rights, qualifications, preferences,
privileges, limitations or restrictions of each such series of New Preferred
Stock, including without limitation dividend rights, dividend rates, voting
rights, conversion rights, terms of redemption (including sinking fund
provisions) and liquidation preferences, without any further vote or action by
the holders of the New Common Stock. Actions by the Sheridan Board to issue
any such shares could have an adverse effect on the voting power of the
existing holders of New Common Stock and could also have the effect of
delaying, deferring or preventing a change in control of Sheridan. Sheridan
currently does not intend to issue additional shares of New Common Stock or
shares of New Preferred Stock.     
   
  Each share is entitled to participate equally in dividends when, as and if
declared by the Sheridan Board and in the distribution of assets of Sheridan
upon liquidation after payment of liabilities and liquidation preferences of
any outstanding shares of New Preferred Stock.     
 
                                      38
<PAGE>
 
                    BUSINESS AND PROPERTIES OF THE COMPANY
 
GENERAL
 
  TGX Corporation ("TGX" or the "Company"), formerly named Templeton Energy,
Inc., is a Delaware corporation that was organized in June 1980. TGX's
executive offices are at 222 Pennbright, Suite 200, Houston, Texas 77090
(telephone number 281/872-0500). TGX is a domestic independent energy company
engaged in the production of oil and natural gas and in oil and natural gas
exploration for its direct account and, previously, beneficially through
general and limited partnerships which were sold to public and private
investors. TGX is also engaged in intrastate natural gas gathering and
treating. TGX commenced operations on July 1, 1981 as the result of the
consummation of an offer in which shares of its Common Stock were issued in
exchange for certain interests in developed and undeveloped oil and natural
gas properties held by various affiliated and unaffiliated entities.
 
  On December 5, 1985, TGX acquired Amarex, Inc. ("Amarex"), subsequently
renamed Temex Energy, Inc. ("Temex"), an oil and gas exploration company
operating primarily through general and limited partnerships (the "Amarex
Partnerships"), in exchange for the payment of approximately $52,000,000 in
cash and the issuance of 11,475,000 shares of Common Stock to former creditors
of Amarex. On August 8, 1988, Temex was merged with and into TGX. Following
this acquisition, TGX, as successor in interest to Temex, acted as general
partner of the Amarex Partnerships until the liquidation or dissolution of
such partnerships in 1994.
 
  From November 1986 through August 1991, TGX, through its then wholly owned
subsidiary LEDCO, Inc. ("LEDCO"), was also engaged in natural gas marketing
and, to a limited degree, providing natural gas transportation services to
producers, local distribution companies and industrial end-users.
 
  On February 22, 1990, TGX filed a voluntary petition in the United States
Bankruptcy Court for the Western District of Louisiana (the "Bankruptcy
Court") for reorganization (the "Reorganization Proceeding") pursuant to
Chapter 11 ("Chapter 11") of Title 11 of the United States Bankruptcy Code
(the "Bankruptcy Code").
 
  Effective August 31, 1991, TGX sold LEDCO to Ledco Acquisition Company,
Inc., a company wholly owned by Steinhardt Partners, L.P., a Delaware limited
partnership ("Steinhardt"), and related entities for $2,900,000 and the
assignment to TGX by Steinhardt of $2,145,000 principal amount of claims
related to TGX's Senior Subordinated Fixed Rate Notes ("Senior Subordinated
Notes").
 
  On January 7, 1992, a Reorganization Plan ("Reorganization Plan" or the
"Plan") was confirmed by the Bankruptcy Court and the Plan became effective on
January 21, 1992 (the "Effective Date"). On October 2, 1992, the Bankruptcy
Court's order of substantial consummation regarding the Plan became final and
non-appealable. For further information concerning the Reorganization Plan,
see "Reorganization Proceeding" below.
 
BUSINESS STRATEGY
 
  After substantial consummation of the Reorganization Plan, and in order to
maximize stockholder value, the Company embarked on a strategy of eliminating
non-core assets, reducing overhead and restructuring its debt. During 1993 and
1994, a substantial portion of management's efforts were engaged in
implementing the components of this business plan. Beginning in 1995, the
Company turned its focus to increasing its oil and gas revenues through a
limited number of acquisitions and the drilling of a small number of oil and
gas exploration and development wells.
 
  In early 1993 the Company relocated and consolidated its offices in Houston,
Texas, thereby reducing expenses and began a program of downsizing, including
consideration of the outsourcing of certain financial and administrative
services. Following the office consolidation, the Company retained an
investment banker to conduct an extensive review of the Company's operations
and assets to determine the most appropriate means for implementing
management's strategy.
 
  The Company's efforts also involved the restructuring and replacing of its
secured long-term debt with Bank of Montreal ("BMO"), the renegotiation of its
debt with certain persons holding notes arising from
 
                                      39
<PAGE>
 
administrative claims incurred during the Reorganization Proceeding, and a
program to liquidate and dissolve substantially all the public and private oil
and gas drilling and production purchase programs for which the Company acted
as a general partner. The Company also implemented a program of selling assets
which were either believed not to be essential to the Company's long-term
business strategy or which could provide a significant immediate cash infusion
to relieve debt obligations and long term benefit by reducing overhead.
 
  In furtherance of these strategies, in 1994, the Company completed the sale
of substantially all of its oil and gas properties in Ohio and New York to
Belden & Blake Corporation ("BBC") for approximately $16,200,000, restructured
its bank indebtedness as set forth under "Bank Indebtedness," liquidated 17
oil and gas partnerships and began the process of dissolving and winding up an
additional eight partnerships, which was completed in 1995, and sold, to a
third party, approximately 31 properties for $1,424,000 which management
believed were not essential to the Company's long-term business strategy.
During 1994, the Company was able to reduce the number of its employees from
27 to 13, excluding contract personnel, and its general and administrative
expenses from $3,323,000 to $2,239,000.
 
  In 1995, the Company's oil and gas activities focused on lower risk workover
operations, drilling development wells and acquiring producing oil and gas
properties. During this period, the Company participated in ten workovers at a
net cost to the Company of $274,000 and participated in drilling seven new
wells at a net cost of $372,000. Of the wells drilled, four were deemed
successful at a net cost of $303,000. Also, in 1995, the Company acquired
additional interests in certain of its operated producing properties and five
new producing wells at a total net acquisition cost of $771,000. As a result
of these activities and upward revision of previous estimates, the Company, in
1995, increased its total proved reserves by approximately 1.9 equivalent
billion cubic feet of gas ("Bcf") (one barrel of oil equals six Mcf of gas and
1,000,000 Mcf equals one Bcf) from year-end 1994, representing a 12% increase
in equivalent year end reserves.
 
  On April 12, 1996 the Company entered into a Settlement Agreement with
National Fuel Gas Distribution Corporation ("NFG") and the Public Service
Commission of the State of New York. Pursuant to the agreement, TGX received
$7,200,000 from NFG and all parties to the Settlement Agreement dismissed all
claims and counterclaims against each other. In conjunction with the NFG
settlement, the Company recognized a net litigation settlement gain of
$7,100,000, after payment of $100,000 to a third party entitled to participate
in the proceeds. For further information concerning the settlement see "Bank
Indebtedness" and "NFG Litigation" below. As the Company's financial condition
continued to improve, the Company expanded its drilling and property
acquisition activity resulting in total 1996 capital expenditures of
$4,280,000. As a result of these expenditures and improvement in year end
product prices, the Company, in 1996, increased its total proved reserves by
3.8 equivalent Bcf or 21% from year-end 1995 equivalent reserves.
 
BANK INDEBTEDNESS
 
  Prior to the Reorganization Proceeding, BMO was TGX's principal secured
lender. At the time of the Chapter 11 filing, TGX owed approximately
$29,700,000 to BMO (the "Existing BMO Debt") which was secured by
substantially all of TGX's assets. TGX also guaranteed to BMO certain of the
debt of LEDCO.
Pursuant to the Plan, TGX entered into an Amended and Restated Credit
Agreement (the "Amended Credit Agreement") under which the Existing BMO Debt
was continued and preserved, but was evidenced by new loans ("New BMO Loans"),
in the original aggregate principal amount of approximately $27,000,000 which
continued to be secured by substantially all of TGX's assets. TGX also entered
into a revolving credit agreement for working capital or the issuance of
letters of credit in the maximum amount of $1,000,000. The guaranty of the
LEDCO debt was eliminated.
 
  In early 1993, the Company was notified that events of default had occurred
under the Amended Credit Agreement which were not cured and, as a result, BMO
had the right to take certain actions under the Amended Credit Agreement,
including without limitation, the acceleration of all of the New BMO Loans.
 
  In January 1994, in conjunction with the Company's sale of certain assets to
BBC, as described under "Proved Oil and Natural Gas Reserves--Sale of New York
and Ohio Properties", the Company made a debt
 
                                      40
<PAGE>
 
service payment of approximately $14,300,000 to BMO and entered into a limited
forbearance agreement, pursuant to which TGX was required to make a payment
(the "Required Payment") of $18,000,000 plus accrued interest and fees less
(i) the $14,300,000 paid to BMO and (ii) any amounts paid to BMO subsequent to
January 1, 1994, that were applied toward the Required Payment.
 
  On July 13, 1994, TGX entered into a series of agreements with BMO and Bank
One, Texas, N.A. ("Bank One") whereby the New BMO Loans were restructured and
all BMO Events of Default resolved. Pursuant to the restructuring, Bank One
established a borrowing-based facility of $2,350,000 under which TGX
immediately borrowed $1,600,000, of which $1,452,000 was paid to BMO in
satisfaction of the remaining amount due of the Required Payment. The Bank One
facility originally bore interest at Bank One's stated rate plus 2% and was to
mature on July 13, 1997. The Bank One facility is secured by substantially all
of TGX's oil and gas properties and is repayable through monthly borrowing
base reductions. The borrowing base is redetermined at a minimum of every six
months or at Bank One's discretion. The Bank One facility requires the
maintenance of certain financial ratios including a working capital ratio of 1
to 1, as defined, and a tangible net worth of a minimum of $5,000,000, a 1997
annual limit on general and administrative expense of $1,700,000 and other
ratios. Effective September 30, 1996, the credit facility was amended and the
borrowing base was increased to $5,000,000, with monthly borrowing base
reductions of $100,000, interest rate lowered to stated rate plus 1.5% and the
maturity extended to June 30, 1999. The Company had $1,500,000 borrowings
outstanding at December 31, 1996.
 
  Simultaneously with securing the Bank One facility and payment of the
Required Payment, BMO released all of its liens on TGX's properties with the
exception of its lien on the NFG Litigation. As part of the loan
restructuring, BMO converted $4,652,000 (the "BMOF Principal") of the New BMO
Loans, including fees and expenses, to a non-recourse note secured only by the
litigation pending against NFG ("NFG Litigation") and any proceeds that might
be received therefrom. BMO assigned its rights to the loan, security and TGX
note, to BMO's wholly owned subsidiary, BMO Financial Inc. ("BMOF"). Pursuant
to the July 13, 1994 agreement, after repayment of the outstanding BMOF
Principal, plus interest, from NFG Litigation proceeds, if any, BMOF would
have in certain instances, after TGX received a sum equal to the amount paid
to BMOF, been entitled to receive up to fifty percent interest in certain
additional litigation proceeds. If NFG Litigation proceeds were insufficient
to repay the BMOF Principal, plus applicable interest, TGX would have no
further obligation for such repayment. The BMOF note had no recourse, except
against NFG Litigation proceeds, if any, and was to mature on December 31,
1997, subject to each party having the right to extend the maturity date. The
BMOF note bore interest at the rate of 10% per annum, however, until December
31, 1997, and for such further time as BMOF elected to extend the maturity
date of such loan, no cash payment for such interest would be required;
instead, TGX was to pay interest in kind through the issuance of additional
notes to BMOF.
 
  On December 31, 1995, TGX and BMOF executed a First Amendment to the Second
Amended and Restated Credit Agreement ("BMOF Agreement"). Pursuant to the BMOF
Agreement, TGX and BMOF were to share equally any NFG Litigation proceeds up
to $8,000,000. BMOF was to receive 100% of any proceeds in excess of
$8,000,000 until the total received by BMOF equalled the BMOF Principal, plus
any accrued interest. Thereafter, the Company was to receive proceeds until
the total it received equalled the amount received by BMOF, and any additional
NFG Litigation proceeds would have been shared equally by TGX and BMOF. The
NFG Litigation was settled on April 12, 1996, for $7,200,000 and, after
payment to BMOF of $3,600,000, the Company recognized an extraordinary gain
for debt forgiveness of $1,831,000, net of income taxes of $37,000, resulting
from forgiveness of the remaining BMOF Principal including accrued interest,
paid in kind through the issuance of additional BMOF notes, of $816,000. See
"--NFG Litigation."
 
  See Note 3 of the Notes to Consolidated Financial Statements.
 
ADMINISTRATIVE CLAIMS
 
  During the Reorganization Proceeding, TGX incurred, and claimants filed
applications for, approximately $7,131,000 in administrative fees and expenses
relating to the reorganization ("Administrative Claims"). TGX objected to
certain of the Administrative Claims and negotiated settlement amounts and
terms of payment with
 
                                      41
<PAGE>
 
certain holders of Administrative Claims. As a result, each of these
administrative claimants, other than three designated administrative claimants
whose administrative claims were satisfied in a different manner, were
entitled to receive a promissory note (the "Administrative Notes") due
December 31, 1994, in satisfaction of each claimant's unpaid Administrative
Claim. Such Administrative Notes were to be issued upon the execution of
releases in favor of the Company and others. Substantially all persons
entitled to Administrative Notes executed such releases. See "Reorganization
Proceeding--Overview of the Plan." The Administrative Notes bore interest at a
rate not to exceed 8% and were secured with certain collateral (the
"Consummation Collateral"). If the proceeds related to the Consummation
Collateral were not sufficient to satisfy the Company's obligations under the
Administrative Notes the Company's excess operating funds, if any, would be
applied toward the balances due. During late 1994 and early 1995, the Company
renegotiated the terms of substantially all of the Administrative Notes. As a
result of negotiations and forfeitures, Administrative Notes totaling
approximately $1,126,000 in principal and $253,000 in accrued interest charges
were renegotiated with the Company making cash payments of $455,000, issuing
151,518 shares of the Company's Senior Preferred Stock and a $90,000 principal
amount nonrecourse note payable out of TGX's share of proceeds, if any, to be
received from the NFG Litigation. As a result of the Administrative Note
renegotiations and administrative claim forfeitures, the Company reflected an
extraordinary net gain in 1995 of $93,000, and all such notes and claims were
settled as of year end 1995.
 
NFG LITIGATION
 
  The NFG Contract was executed in 1974 between Paragon Resources, Inc.
("Paragon") and Iroquois Gas Corporation, predecessors of TGX and NFG, as
seller and buyer, respectively. In 1983, the New York State Public Service
Commission (the "PSC"), under whose jurisdiction NFG's intrastate gas
purchases fall, expressed dissatisfaction with the NFG Contract for among
other reasons the inclusion of a "three-pipeline escalator" ("3-PE") in its
pricing provision. The PSC, in its Opinion No. 83-26 ("Opinion 83-26") found
3-PE clauses to be unacceptable and disapproved contracts containing such
clauses.
 
  A dispute arose between NFG and TGX as to whether the NFG Contract remained
in force after Opinion 83-26 and, if it did, what price the NFG Contract
prescribed starting in December, 1983 when Opinion 83-26 was issued. In
November 1984, NFG commenced an action in the United States District Court for
the Western District of New York (Civ. No. 84-1372E) (the "District Court")
seeking a declaration from the District Court of the rights and obligations of
the parties under the NFG Contract after Opinion 83-26. TGX counterclaimed for
damages claiming that NFG had breached the terms of the NFG Contract. The NFG
Litigation addressed, among other things, the validity of the NFG Contract,
the price for gas sold, and certain other claims relating to NFG's obligation
to take or pay for, even if not taken, gas dedicated to the NFG Contract. The
PSC intervened as a plaintiff in the District Court action. In March 1989, a
separate action for breach of contract was commenced by TGX against NFG in New
York's Supreme Court, County of Chautauqua (Index No. G-13357). This case was
stayed in 1989 on the grounds that the issues in this case were the same as
those in the District Court action.
 
  Both NFG and the PSC took the position before the District Court that the
effect of Opinion 83-26 was to cancel the NFG Contract in its entirety. In
January 1991, the District Court declared that because Opinion 83-26 had
abrogated an essential term of the NFG Contract, it had voided the entire NFG
Contract.
 
  In December 1991, the Court of Appeals for the Second Circuit (the "Second
Circuit") reversed the judgment of the District Court. The Second Circuit held
that only the price term had been rejected by the PSC but that such rejection
did not void the entire NFG Contract, which clearly envisioned potential
governmental rulings like Opinion 83-26. Therefore, the Second Circuit
permitted TGX to continue to deliver gas under the NFG Contract in the
aftermath of Opinion 83-26 at a price consistent with that Opinion.
 
  On remand from the Second Circuit, in January 1993, the District Court
granted TGX's motion for partial summary judgment regarding the price to be
paid under the NFG Contract.
 
  Based on the District Court's order, TGX concluded that from December 1983,
until at least January 1, 1993, the date price controls under the Natural Gas
Policy Act ("NGPA") were terminated, the price under the
 
                                      42
<PAGE>
 
NFG Contract was equal to the lower of (i) the applicable maximum lawful price
for December 1983 and for each month thereafter as established by the NGPA,
subject to the escalations provided by the NGPA, or (ii) the December 1983
permitted price under the NFG Contract of approximately $4.41 per Mcf.
 
  In December 1992, NFG filed a motion with the PSC requesting a hearing to
determine pricing issues related to the NFG Contract. Pursuant to this
request, the PSC ordered that a proceeding take place, but after the hearing
the PSC decided that the matter was not ripe for its review because, in its
view, there was currently no contract price in the contract for the PSC to
review.
 
  In September 1994, TGX amended and supplemented its counterclaims in the
District Court action to assert additional claims against NFG for breach and
repudiation of the NFG Contract and for punitive damages based upon NFG's bad
faith course of conduct towards TGX.
 
  NFG raised various defenses against TGX's counterclaim in the District Court
action including claims that TGX itself repudiated and breached the contract
by its conduct; a claim that the assignment of the contract from Paragon to
TGX was not valid; procedural and jurisdictional defenses; defenses based upon
the Public Service Law; a claim that TGX failed to fix a price in good faith
after the issuance of Opinion 83-26; and a claim for setoffs for unspecified
damages to NFG's facilities.
 
  During its Reorganization Proceeding, TGX filed an adversary proceeding (the
"Turnover Proceeding") in the Bankruptcy Court to compel NFG to pay the amount
due to TGX pursuant to the provisions of the NFG Contract. Effective June 19,
1992, TGX and NFG entered into a partial settlement agreement, and, in
consideration of a payment of $2,940,000 (the "Payment") from NFG, TGX
dismissed the Turnover Proceeding without prejudice and released NFG (subject
to certain limitations) from any and all liability and affirmative claims for
relief alleged to arise from or based upon certain evidence presented by TGX
in the Turnover Proceeding.
 
  On April 12, 1996, a final settlement of the NFG Litigation was reached. In
return for a lump-sum payment to TGX of $7,200,000, of which TGX retained
approximately $3,500,000 after a debt retirement payment of $3,600,000 and a
$100,000 payment to another party entitled to participate in the proceeds, a
full release of all claims between the parties was executed.
 
  See Note 3 of the Notes to Consolidated Financial Statements.
 
FRESH START REPORTING
 
  As a result of the substantial consummation of the Reorganization Plan and
due to (i) the reallocation of the voting rights of equity interests owners
and (ii) the reorganization value of TGX's assets being less than the total of
all of its post-petition liabilities and allowed claims, as of October 2,
1992, the effects of the Reorganization Proceeding were accounted for in
accordance with the fresh start reporting standards promulgated under the
American Institute of Certified Public Accountants Statement of Position 90-7
"Financial Reporting by Entities in Reorganization Under the Bankruptcy Code"
("SOP 90-7").
 
  In conjunction with implementing fresh start reporting, the Company's
management determined a reorganization value ("RV') which attempted to
establish the fair market value of the Company as of the date of substantial
consummation of the Plan. Oil and gas property and other related asset values
were estimated by discounting future net revenues on the basis of actual, or
in some instances, assumed prices. Other assets were valued at their book
value. The value of the Company's Senior Preferred Stock, which was issued
pursuant to the Plan, was determined on the basis of the difference between
the RV of the Company's assets less the present value of liabilities and the
par value of preconsummation equity interests. For further information
concerning the method of calculating the RV, see Note 2 of the Notes to
Consolidated Financial Statements.
 
  The RV was determined by management on the basis of its best judgment of
what it considered at the time to be the fair market value ("FMV') of the
Company's assets and liabilities, after reviewing relevant facts
 
                                      43
<PAGE>
 
concerning the price at which similar assets were being sold between willing
buyers and sellers. However, there can be no assurances that the RV and the
FMV are comparable and the difference between the Company's calculated RV and
the FMV may, in fact, be material.
 
  In conjunction with the implementation of fresh start reporting, the Company
also implemented the successful efforts method, rather than the full cost
method, of accounting for oil and natural gas properties. In the opinion of
the Company's management, this accounting method was preferable since it would
result in a better matching of oil and natural gas revenue with the related
exploration and production cost and expense. See Note 1 of the Notes to
Consolidated Financial Statements.
 
REORGANIZATION PROCEEDING
 
  Overview of the Plan. The following is a brief summary of certain
information regarding the Reorganization Plan. The summary is necessarily
incomplete and selective and is qualified in its entirety by reference to the
Plan, the full terms of which are hereby incorporated by reference.
 
  Pursuant to the Reorganization Plan, the Company entered into the Amended
Credit Agreement with BMO, and, depending on the amount of the claim,
satisfied unsecured claims with cash or Senior Preferred Stock. See "Business
and Properties of the Company--Bank Indebtedness", and "--Unsecured Claims".
In addition, certain specified classes of claims were paid in cash, retained
or otherwise provided for. Administrative claimants holding allowed
Administrative Claims under the Reorganization Plan were paid in cash or had
their claims otherwise satisfied, and numerous executory contracts were
assumed or rejected by TGX. See "Business and Properties of the Company--
Administrative Claims." As of December 31, 1995, the aggregate balance of
prepetition obligations related to assumed executory contracts was
approximately $317,000, related to undistributed net oil and gas revenues and
which were in a "suspended pay" status. Pursuant to the Plan and statute of
limitations, the "suspended pay" liability was dismissed during 1996.
 
  As of the effective date of the Reorganization Plan, the preferred and
common stockholders selected a new Board of Directors (the "New Board")
comprised of eight individuals to serve until January 1995, or until their
successors were duly elected and qualified. The New Board consisted of five
members selected by holders of the Senior Preferred Stock (two of which were
designees of a creditor, and one of which could not be an affiliate of any
holder of the Senior Preferred Stock) and two members selected by holders of
the other classes of stock acting as one class. The remaining member of the
New Board was required to be the chief executive officer of the Company. In
January 1995 TGX amended the TGX Bylaws to provide for a Board of five
members. When new directors are elected, the Reorganization Plan provides that
directors are to be elected without regard to class representation. However,
holders of Senior Preferred Stock have 95% of the voting power of TGX and a
plurality of such holders can, therefore, effectively elect all directors. At
any time after January 21, 1995, whenever quarterly dividends payable on the
Senior Preferred Stock are in arrears in an aggregate amount equal to six full
quarterly dividends (which need not be consecutive), the number of directors
of the Company is increased by two and such additional directors are elected
by the holders of the Senior Preferred Stock at the next succeeding annual
meeting of stockholders (and at each succeeding annual meeting of stockholders
thereafter until such right shall terminate as provided pursuant to the Plan).
See "--Unsecured Claims."
 
  Administrative Expenses. During the Reorganization Proceeding, certain
claimants filed applications for Administrative Claims of approximately
$7,131,000 in administrative fees and expenses related to the Reorganization
Proceeding. Three of the large administrative claimants (the "Opposing
Administrative Claimants") agreed that in consideration for the satisfaction
in full of the balance of their Administrative Claims as of the date of
substantial consummation they would receive (i) a payment of $300,000 (ii)
55,000 shares of the Senior Preferred Stock and (iii) the conveyance of
approximately 29,400 acres of undeveloped land in Culberson and Hudspeth
Counties, Texas. For information concerning the payment of other
Administrative Claims see "Business and Properties of the Company--
Administrative Claims".
 
 
                                      44
<PAGE>
 
  Unsecured Claims. Pursuant to the Reorganization Plan, the Company
designated the Senior Preferred Stock to be issued to holders of certain
classes of claims and retained its Old Preferred Stock and Common Stock.
 
  Senior Preferred Stock. The Reorganization Plan provided for a total of
8,529,246 shares of Senior Preferred Stock to be issued to holders of certain
unsecured claims on the basis of one share of Senior Preferred Stock for every
$10 of certain finally allowed or otherwise agreed upon claims. The Senior
Preferred Stock entitles its holders to receive a 10% annual compounded cash
dividend, payable quarterly, provided however, that the payment of such
dividend does not violate Delaware law or certain covenants in the Company's
bank loan agreements. The Company has not paid any of the quarterly dividends
required since the effective date of the Plan.
 
  The Senior Preferred Stock was issued without registration under the
Securities Act of 1933, as amended (the "Securities Act") in reliance upon the
exemption from registration available under Section 1145 of the Bankruptcy
Code.
 
  Holders of Senior Preferred Stock have a liquidation preference in the
amount of $10 per share, with the holders of Senior Preferred Stock having
priority over the liquidation preference afforded the holders of Old Preferred
Stock and Common Stock. At the option of the Company, the Senior Preferred
Stock is redeemable in whole or in part at any time at a price per share equal
to the liquidation preference amount per share, plus all accrued and unpaid
dividends through the date of redemption. The Company must redeem all
outstanding shares of the Senior Preferred Stock at the full redemption price
on or before ten years from the effective date of the Plan unless such
redemption would violate Delaware law, in which case the Company must redeem
the Senior Preferred Stock as soon as it is possible in accordance with
Delaware law.
 
  Holders of Senior Preferred Stock have 95% of the voting rights of TGX with
the remaining 5% of voting rights being allocated collectively among holders
of the Old Preferred Stock and Common Stock (herein collectively called the
"Other Stock").
 
  Old Preferred Stock. The 300,000 shares of Old Preferred Stock, with a
liquidation preference of $10 per share, ranks junior in preference and
priority to Senior Preferred Stock. Subject to the prohibitions of Delaware
law and the Amended Credit Agreement, Old Preferred Stock receives dividends
at the rate of 9% per annum beginning on the Effective Date of the Plan,
payable annually on the first business day of January of each year, with such
dividends being paid in additional shares of Old Preferred Stock until the
Senior Preferred Stock is redeemed in full. As of December 31, 1996, Old
Preferred Stock shares to be issued for accrued dividends totaled 185,000
shares. Subsequent to their sale of LEDCO to TGX, Gaylon D. Simmons and Gloria
Annette Turner Simmons (collectively, "Simmons"), the former owners of LEDCO,
have been engaged in a series of lawsuits against TGX and certain other
parties. Pursuant to the Plan, Simmons will not seek recoveries against the
Company in this litigation. In addition, any recoveries by Simmons from other
parties, after a reduction for Simmons' reasonable attorneys' fees and costs
plus interest, will result in the cancellation of securities issued to Simmons
to the extent necessary to assure that Simmons' treatment under the Plan does
not result in a double recovery on identical causes of action.
 
  The Old Preferred Stock may be converted in whole, at any time, or in part,
from time to time, at the option of the holder thereof into fully paid and
non-assessable shares of Common Stock at the conversion rate of four shares of
Common Stock for each share of Old Preferred Stock.
 
  Common Stock. The Company is authorized to issue 100,000,000 shares of
Common Stock, of which 24,955,807 shares were outstanding as of December 31,
1996. All outstanding shares of the Common Stock are fully paid and non-
assessable.
 
   The holders of Common Stock are entitled to one vote per share upon all
matters presented to them. Pursuant to the Reorganization Plan, holders of
Common Stock are entitled, collectively with holders of Old Preferred Stock,
to 5% of the total voting power of the Company. The holders of Common Stock
are entitled to
 
                                      45
<PAGE>
 
dividends in such amounts as may be declared from time to time out of any
funds legally available for such purposes. However, no dividends are payable
until all accrued dividends have been paid to the holders of the Preferred
Stock. In the event of liquidation, dissolution or winding up of the affairs
of the Company, whether voluntary or involuntary, after payment of debts and
liquidation preferences on preferred stock, all remaining assets, if any, will
be divided and distributed among the holders of Common Stock pro rata
according to the number of shares owned by them. The Common Stock does not
have preemptive rights and is not subject to redemption.
 
  Jurisdiction of Bankruptcy Court. The Reorganization Plan provides that the
Bankruptcy Court retains jurisdiction after the confirmation date for certain
matters including, but not limited to, (i) modifying the Plan pursuant to the
Bankruptcy Code, (ii) assuring the performance by TGX under the Plan, (iii)
enforcing and interpreting the terms and conditions of the Plan, (iv) entering
into such orders, including injunctions, as are necessary to enforce the
title, rights and powers of TGX and to impose such limitations, restrictions,
terms and conditions of such title, rights and powers as the Bankruptcy Court
may deem necessary and, (v) deciding issues concerning federal tax reporting
and withholding which arise in connection with the confirmation of the Plan.
 
PROPERTIES
 
  Oil and Gas Exploration and Production. The Company's principal post
bankruptcy activity, prior to 1995, was the production of oil and natural gas.
In 1995, the Company began a modest program of oil and natural gas exploration
and development drilling and property acquisition activities as allowed by its
financial condition. In 1996, as the Company's financial condition continued
to improve, the Company expanded its development drilling and property
acquisition activity resulting in total 1996 capital expenditures of
$4,280,000. The Company continues to maintain a staff of professional and
support personnel required to manage its existing properties, including three
engineers, and two marketing and land personnel. In addition, the Company
engages petroleum landmen, geologists and engineers on a contract basis, as
required.
 
 Proved Oil and Natural Gas Reserves.
 
   (a) General:
 
    Estimating economically recoverable crude oil and natural gas reserves
  and the future net revenues therefrom is not an exact science and is based
  upon a number of variable factors, such as historical production of the
  subject properties as compared with similar producing properties, and
  assumptions such as the effects of regulation by governmental agencies,
  future taxes, and development and other costs, all of which may vary
  considerably from actual results. All such estimates are to some degree
  speculative, and classifications of reserves are only attempts to define
  the degree of speculation involved. For these reasons, estimates of
  economically recoverable reserves of crude oil and natural gas attributable
  to any particular group of properties, the classification and risk of
  recovering such reserves, and estimates of the future net revenues expected
  therefrom, prepared by different engineers or by the same engineers at
  different times, may vary substantially.
 
    Proved oil and natural gas reserves are the estimated quantities of crude
  oil, natural gas and natural gas liquids which geological and engineering
  data demonstrate with reasonable certainty to be recoverable in future
  years from known reservoirs under existing economic and operating
  conditions. Estimates with respect to proved undeveloped and proved
  developed non-producing reserves that may be developed and produced in the
  future are based upon volumetric calculations or upon analogy to similar
  types of reservoirs. Later studies of the same reservoirs based upon
  production history may result in variations, which may be substantial. The
  actual production, revenues, severance and excise taxes, development costs,
  and operating expenditures with respect to the Company's reserves as
  reflected herein may vary from estimates, and such variances may be
  material.
 
    Based on the independent petroleum engineering report of Netherland,
  Sewell & Associates, Inc., as of January 1, 1997 and 1996, utilizing year
  end product prices and costs held constant, the Company's proved
 
                                      46
<PAGE>
 
  oil and natural gas reserve volumes, in thousand of barrels of oil
  ("MBbls") and billion of cubic feet of gas ("Bcf"), and associated
  estimated future net revenues, undiscounted and discounted at 10% ("PV
  10"), before future income taxes, are as follows (dollars in thousands):
 
<TABLE>
<CAPTION>
                                             1996                  1995
                                     --------------------  --------------------
                                       OIL(MBBLS) GAS(BCF)  OIL(MBBLS)  GAS(BCF)
                                     ------------ -------  ------------ -------
   <S>                               <C>          <C>      <C>          <C>
   Proved developed.................       525       13.4        465        9.7
   Proved undeveloped...............       456        2.4        479        2.5
                                       -------    -------    -------    -------
   Total proved reserves............       981       15.8        944       12.2
                                       =======    =======    =======    =======
<CAPTION>
                                             1996                  1995
                                     --------------------  --------------------
                                     UNDISCOUNTED  PV 10   UNDISCOUNTED  PV 10
                                     ------------ -------  ------------ -------
   <S>                               <C>          <C>      <C>          <C>
   Proved developed.................   $39,118    $23,761    $13,831    $ 8,816
   Proved undeveloped...............    11,827      5,495      7,054      2,988
                                       -------    -------    -------    -------
   Total proved reserves............   $50,945    $29,256    $20,885    $11,804
                                       =======    =======    =======    =======
</TABLE>
 
    Estimated future development costs associated with proved developed non-
  producing and proved undeveloped reserves for both 1996 and 1995 total
  $3,800,000. Production of those reserves is dependent upon the Company's
  ability to fund such future development costs, which are scheduled to be
  incurred over numerous years. See Note 12 of the Notes to Consolidated
  Financial Statements for a discussion of the calculation of the estimated
  future net revenues on an undiscounted and discounted basis.
 
   (b) Tabular Information:
 
    The table below sets forth an analysis of the change in the Company's
  proved oil and natural gas reserves for the periods indicated. Reserves are
  stated in Mbls of oil and Bcf of natural gas.
 
<TABLE>
<CAPTION>
                                                             1996       1995
                                                           ---------  ---------
                                                           OIL  GAS   OIL  GAS
                                                           ---  ----  ---  ----
   <S>                                                     <C>  <C>   <C>  <C>
   Proved reserves:
     Beginning of year.................................... 944  12.2  931  10.4
     Sales of reserves-in-place...........................  (8)  (.1)  (2)   --
     Purchases of reserves-in-place.......................  45   4.1   22   1.2
     Extensions and discoveries...........................  57    .6    1   0.1
     Revisions of previous estimates......................  19    .5   55   2.2
     Production (1)....................................... (76) (1.5) (63) (1.7)
                                                           ---  ----  ---  ----
     End of year.......................................... 981  15.8  944  12.2
                                                           ===  ====  ===  ====
   Proved-developed reserves.............................. 525  13.4  465   9.7
                                                           ===  ====  ===  ====
</TABLE>
--------
(1) 1995 includes .220 Bcf of gas volumes related to gas balancing
    collections.
 
  Except for the data contained in filings with the Securities and Exchange
Commission ("SEC") and information furnished in conjunction with the
Reorganization Proceeding pursuant to the order of the Bankruptcy Court, the
Company has not filed information relating to estimates of its proved oil and
natural gas reserves with any federal agencies.
 
                                      47
<PAGE>
 
  Oil and Gas Production. Information pertaining to the Company's oil and
natural gas production is set forth in the table. Average natural gas price is
shown per thousand cubic feet of gas ("Mcf") and equivalent Mcf is based on
one barrel of oil equals six Mcf of natural gas on a heating value basis.
<TABLE>
<CAPTION>
                                                                  YEAR ENDED
                                                                 DECEMBER 31,
                                                                 --------------
                                                                  1996    1995
                                                                 ------  ------
<S>                                                              <C>     <C>
Oil sales volume (MBbls)........................................     76      63
Average price per barrel........................................ $21.16  $17.19
Natural gas sales volume (Bcf)(1)...............................  1.542   1.701
Average price per Mcf........................................... $ 2.24  $ 1.49
Equivalent Mcf..................................................  1,999   2,078
Lease operating expense per equivalent Mcf...................... $ 0.71  $ 0.61
Net oil and natural gas revenues (in thousands):
  Sales revenues................................................ $5,059  $3,611
  Lease operating expenses(2)................................... (1,417) (1,276)
  Treating and transportation expenses..........................   (794)   (629)
                                                                 ------  ------
Net oil and natural gas revenues................................ $2,848  $1,706
                                                                 ======  ======
</TABLE>
--------
(1) 1995 includes .220 Bcf of gas volumes and $213,000 of natural gas revenues
    related to gas balancing collections.
(2) Includes production taxes and workover costs.
 
  The following table summarizes drilling and acquisition well activity, as of
December 31 for each year presented, to which the Company owns a working
interest:
<TABLE>
<CAPTION>
                                           GROSS WELLS           NET WELLS
                                       -------------------- --------------------
                                       PRODUCTIVE DRY TOTAL PRODUCTIVE DRY TOTAL
                                       ---------- --- ----- ---------- --- -----
<S>                                    <C>        <C> <C>   <C>        <C> <C>
Development wells:
  1995................................      3       2    5      .47    .30  .77
  1996................................      6       1    7     1.32    .12 1.44
Exploration wells:
  1995................................      1       1    2      .07    .16  .23
  1996................................     --       1    1       --    .31  .31
Acquisition wells:
  1995................................      5      --    5     1.55     -- 1.55
  1996................................     23      --   23     7.87     -- 7.87
</TABLE>
 
  Company net drilling costs for 1996 totaled $1,288,000 of which $164,000 was
expensed as unsuccessful exploration cost. The Company also incurred unproved
and proved property acquisition costs of $163,000 and $2,931,000,
respectively. Of the proved property purchases, $1,737,000 was acquired in
December with effective dates at the end of December 1996 resulting in no
impact on 1996 revenues and expenses. The Company also implemented workover
operations at a net cost of $239,000 in 1996. In 1995, the Company incurred
net drilling costs of $407,000 of which $69,000 was expensed as unsuccessful
exploration cost. The Company also incurred unproved and proved property
acquisition costs of $18,000 and $718,000, respectively, and workover costs of
$274,000.
 
  Leasehold Acreage and Productive Wells. The following table sets forth the
Company's interest in undeveloped acreage, developed acreage and productive
wells in which it owns a working interest as of December 31, 1996.
<TABLE>
<CAPTION>
                                  UNDEVELOPED      DEVELOPED       PRODUCTIVE
                                    ACREAGE         ACREAGE         WELLS(1)
                                 --------------  --------------  --------------
                                 GROSS(2) NET(3) GROSS(2) NET(3) GROSS(2) NET(3)
                                 -------- -----  -------  -----  -------  -----
<S>                              <C>      <C>    <C>      <C>    <C>      <C>
Arkansas........................  1,571     471   3,560   1,178     47      17
Louisiana.......................  1,246     586   9,330   2,478     21       6
Oklahoma........................  5,211     953  26,637   4,478     53       8
Texas...........................    115      29   8,966   1,341     20       4
                                  -----   -----  ------   -----    ---     ---
  Total.........................  8,143   2,039  48,493   9,475    141      35
                                  =====   =====  ======   =====    ===     ===
</TABLE>
 
                                      48
<PAGE>
 
--------
(1) Productive wells are wells capable of producing oil or natural gas.
(2) Gross represents the total number of acres or wells in which the Company
    owns a working interest.
(3) Net represents the Company's proportionate working interest resulting from
    its ownership in the gross acres or wells.
 
  The following table provides, as of December 31 for each year presented,
additional information pertaining to the productive wells in which the Company
owns a working interest.
 
<TABLE>
<CAPTION>
                                                       GROSS(1)        NET(2)
                                                     ------------- -------------
                                                     OIL GAS TOTAL OIL GAS TOTAL
                                                     --- --- ----- --- --- -----
<S>                                                  <C> <C> <C>   <C> <C> <C>
1995................................................  56  93  149   17  14   31
1996................................................  56  85  141   20  15   35
</TABLE>
--------
(1) Gross wells are the total number of wells in which the Company owns a
    working interest.
(2) Net represents the Company's proportionate working interest resulting from
    its ownership in each gross well.
 
  Natural Gas Treating Plant. Through a joint venture, the Company owns a 35%
interest in a natural gas treating plant located in the Comite Field, East
Baton Rouge Parish, Louisiana. Natural gas from one well operated by the
Company and two wells operated by third parties is transported to the plant
where it is treated to satisfy pipeline specifications. The plant also
provides condensate handling and saltwater disposal facilities. The Company
receives cash distributions from the joint venture for its share of net cash
flow. In addition, the joint venture charges the Company for gas treating and
such charges are included in operating expenses. For information concerning
this treating plant, see Note 5 of the Notes to Consolidated Financial
Statements.
 
COMPETITION, MARKETS AND OTHER EXTERNAL FACTORS
 
  Competition and Marketing--Oil and Natural Gas Industry. The oil and natural
gas industry is highly competitive both in the search for and acquisition of
oil and natural gas reserves and in the redefining, processing and marketing
of petroleum products. Competitors include the major and independent crude oil
and natural gas companies, individual producers and operators, and major
pipeline companies. Other sources of energy, such as coal and nuclear power,
also provide competition, and crude oil and natural gas are subject to
substantial competition from foreign sources.
 
  The price the Company receives for its oil production depends on many
variables over which it has no control, such as the world supply of, and
demand for, oil, the level of imports, and the political stability of foreign
governments. The influence exerted by these and other factors has caused
domestic oil prices to fluctuate dramatically.
 
  The availability of a ready market as well as the price received for natural
gas produced and sold by the Company also depends upon numerous factors beyond
its control, including the proximity of producing natural gas properties to
pipelines, the capacity of such pipelines, fluctuations in seasonal or overall
demand, domestic deliverability, government regulations, and competition from
alternative forms of energy. A trend has emerged recently among major natural
gas marketing companies toward consolidation mergers, both amongst themselves
as well as in the form of strategic alliances with large producers or end-
users. These consolidations have the effect of putting control of the majority
of the supply and the market in hands of a few industry participants. The
longer term ramifications of this trend are difficult to foresee, but will
likely have an impact on the way natural gas is bought and sold in the future
and this impact could be potentially more significant to the smaller
independent producers such as the Company.
 
  Major Customers. Information concerning sales to customers who accounted for
more than 10% of total revenues, the loss of any of which could have a
material adverse effect on the Company's operations if alternative customers
could not be found, is contained in Note 11 of the Notes to Consolidated
Financial Statements appearing elsewhere herein.
 
                                      49
<PAGE>
 
  Production and Development Hazards. Hazards such as unexpected formations,
blow-outs, cratering and fires are involved in crude oil and natural gas
drilling, production and development activities. Such hazards, as well as
adverse weather conditions, may hinder or delay drilling and development
operations. TGX attempts to obtain and maintain insurance coverage customary
in the crude oil and natural gas industry, but may be subject to liability for
pollution and other damages or may lose substantial portions of its properties
due to hazards against which it is impossible or impractical (due to
prohibitive premium requirements) to maintain insurance. Governmental
regulations relating to environmental matters could also increase TGX's cost
of production and development operations or require it to cease production and
development operations in certain areas.
 
REGULATION
 
  Environmental Regulation. The drilling for, production, transportation and
storage of oil and natural gas and the operation and maintenance of natural
gas treating plants are subject to various federal and state laws and
regulations designed to protect the environment. Moreover, various state and
governmental agencies are considering, and some have adopted, other laws and
regulations regarding environmental control which could adversely affect the
business of the Company. Compliance with such legislation and regulations,
together with any penalties resulting from noncompliance therewith, may
increase the cost of the Company's operations or may affect the Company's
ability to complete, in a timely fashion, existing or future activities.
However, the Company does not believe that such regulations could materially
and adversely affect its financial condition or operations at the present
time.
 
  State Regulation. All states in which the Company conducts oil and natural
gas production operations have statutory provisions regulating the drilling
for, production, transportation, storage and sale of oil and natural gas. Such
statutes, and the regulations promulgated in connection therewith, generally
are intended to prevent the waste of oil and natural gas and to protect
correlative rights and opportunities to produce oil and natural gas as between
owners of interests in a common reservoir. Certain state regulatory
authorities also regulate the amount of oil and natural gas produced by
assigning allowable rates of production to each well or proration unit.
 
  The Company may conduct operations on federal oil and natural gas leases,
and such operations must comply with numerous regulatory restrictions and
requirements issued by the Mineral Management Service, including various
nondiscrimination statutes, and certain of such operations must be conducted
pursuant to appropriate permits issued by the Bureau of Land and Management.
 
EMPLOYEES
 
  As of March 31, 1997, the Company employed 11 persons, none of whom are
represented by a labor union or collective bargaining agent. Also at March 31,
1997, the Company had engaged one person on a temporary contract basis to
perform certain engineering functions. The Company considers its relations
with its employees to be good and has experienced no work stoppages associated
with labor disputes or grievances.
 
LEGAL PROCEEDINGS
 
  Reorganization Proceeding. For information concerning the Company's
Reorganization Proceeding, see "Reorganization Proceeding" above.
 
  NFG Litigation. For information concerning the NFG Litigation and its
settlement, see "NFG Litigation" above.
 
  Former Director Litigation. On May 31, 1995, the Company entered into a
Settlement Agreement among itself, Paragon Resources, Inc., J.C. Templeton,
W.M. Templeton and a number of other former directors of the Company, trusts
on behalf of members of the Templeton family and other entities pursuant to
which all lawsuits between and among the parties were dismissed with
prejudice. In consideration therefor, the Company received $325,000, an
assignment of certain oil and gas leases, and receipt of past due joint
operating expenses payable
 
                                      50
<PAGE>
 
by certain of the defendants. The Company released lis pendens against certain
of the defendant's properties and conveyed to the defendants an interest in
certain properties to which they were entitled. The parties to the litigation
also conveyed to the Company any Common Stock or Preferred Stock which they
held.
 
  Other. In August 1992, certain unleased mineral interest owners commenced a
legal action against TGX, as operator of certain wells, in the 19th Judicial
District Court for East Baton Rouge Parish, Louisiana (Case Number 383844,
Division "A"). The complaint alleges that revenues in excess of the reasonable
costs of drilling, completing, and operating certain wells had not been
properly credited to the interests of the unleased mineral interest owners. In
July 1995, in a separate action, certain royalty owners in the same wells
commenced a legal action alleging that TGX and other working interest owners
improperly profited under the terms of a Gas Gathering and Transportation
Agreement dated December 12, 1983. Both cases are in the discovery stage and
if settlement negotiations are not successful, TGX will vigorously defend
itself in the litigation.
 
  In March 1994, a hearing was conducted in the Bankruptcy Court regarding the
final allowance of prepetition and administrative claims related to an
overriding royalty interest previously conveyed by TGX. During that hearing,
the parties stipulated that the finally allowed amount of claimant's
prepetition claim would be $600,000. That prepetition claim was fully
satisfied by the issuance of 60,000 shares of Senior Preferred Stock. The
Company had previously estimated that prepetition claim in that amount, and
therefore it had been reflected in prior years' financial statements.
Subsequent to the March 1994 hearing, and after post-hearing motions from both
TGX and the claimant, the Bankruptcy Court entered an order on September 7,
1994 which determined that the claimant would be granted an allowed
administrative expense claim for unpaid overriding royalties arising post-
petition but prior to October 4, 1992 in the amount of $244,000. That
administrative claim, when finally allowed, was to be treated by the issuance
of an Administrative Note under the terms of the Reorganization Plan and was
to be payable under the terms of the Reorganization Plan. The Bankruptcy Court
further ruled that it would not exercise any jurisdiction over claims for
alleged unpaid overriding royalties arising subsequent to October 4, 1992. In
May 1996, TGX settled this litigation for payment of $400,000 and the return
to the Company of the 60,000 shares of Senior Preferred Stock previously
issued.
 
  From time to time, in the normal course of business, the Company is a party
to various other litigation matters the outcome of which, to the extent not
otherwise provided for, should not have a material adverse effect on the
Company.
 
                                      51
<PAGE>
 
                           MARKET PRICE INFORMATION
 
  The Company. As a result of TGX's Chapter 11 filing, in March 1991, the
National Association of Securities Dealers, Inc. (the "NASD") notified TGX
that it was terminating the inclusion of TGX's Common Stock on the Nasdaq
National Market System. Through June 1992, the Company's common stock price
continued to be reported on Nasdaq. Since July 1, 1992, neither the Common
Stock nor the Senior Preferred Stock has been included on the Nasdaq National
Market System. TGX's Common Stock and Senior Preferred Stock are listed on the
NASD "bulletin board". The Senior Preferred Stock was initially listed on the
bulletin board in September 1996.
 
  As of March 31, 1997, there were approximately 3,995 holders of record of
the Company's Common Stock, and 1,541 holders of record of the Senior
Preferred Stock. The following table sets forth bid prices reported by the
National Quotations Bureau, Inc., for the Company's Common Stock. Trading of
the Company's Common Stock is very sporadic. All quotations represent bid
prices between dealers without retail markup or markdown or commission and do
not reflect actual transactions.
 
<TABLE>
<CAPTION>
      QUARTER ENDED                                                  HIGH   LOW
      -------------                                                  ----- -----
      <S>                                                            <C>   <C>
      1997:
        March 31.................................................... $   * $   *
      1996:
        March 31.................................................... $   * $   *
        June 30..................................................... .0002 .0002
        September 30................................................   .10   .10
        December 31.................................................   .01  .001
      1995:
        March 31.................................................... $ .03 $.001
        June 30.....................................................  .005  .005
        September 30................................................   .01   .01
        December 31.................................................   .01  .002
</TABLE>
--------
* No reported trading activity for the period noted.
 
  Holders of Senior Preferred Stock have a dividend and liquidation preference
over holders of other classes of preferred stock and the Common Stock. As of
March 31, 1997, the redemption value and accrued dividends related to the
Senior Preferred Stock were $86,786,000 and $56,473,000, respectively. The
Senior Preferred Stock dividends must be paid in full prior to paying any
dividends for the Common Stock. Under a liquidation scenario, after secured
debt and other liabilities have been paid or provided for, the Senior
Preferred Stock redemption value of $86,786,000 plus any accrued dividends
must be paid in full before any liquidating distributions are made to the
holders of other preferred stock or Common Stock.
 
  The Company has not paid, and does not anticipate paying, any cash dividends
with respect to its Preferred Stock or Common Stock. The Company is prohibited
from paying dividends on its Common Stock at any time that it is in arrears in
paying dividends on any class of its preferred stock. The Company is currently
in arrears in making such payments.
 
  On March 31, 1997, the closing bid and asked price per share of the Common
Stock, as reported by the National Quotations Bureau, Inc., was $0.01. Trading
of the Company's Common Stock is very sporadic.
 
  There was only one NASD trade of the Company's Senior Preferred Stock at
$0.25 per share in November 1996. Due to the limited public trading activity,
the Company cannot determine the market value, if any, therefor.
 
                                      52
<PAGE>
 
                  SELECTED CONSOLIDATED FINANCIAL INFORMATION
 
  The following selected consolidated financial information presented below
for, and as of the end of, each of the years in the two-year period ended
December 31, 1996 is derived from the consolidated financial statements of
TGX, which have been audited by Price Waterhouse LLP, independent accountants.
The following selected consolidated financial information should be read in
conjunction with TGX's consolidated financial statements and related notes and
with "Management's Discussion and Analysis of Financial Condition and Results
of Operations."
 
                     (IN THOUSANDS, EXCEPT PER SHARE DATA)
 
<TABLE>
<CAPTION>
                                                             YEAR ENDED
                                                            DECEMBER 31,
                                                        ------------------
                                                          1996      1995
                                                        --------  --------
<S>                                                     <C>       <C>       
STATEMENT OF OPERATIONS DATA:
  Revenues(1)(2)....................................... $ 13,800  $  4,597
  Costs and expenses:
   Operating expenses..................................    1,417     1,276
   Treating and transportation expense.................      794       629
   Depletion, depreciation and amortization............      964       973
   General and administrative expenses.................    2,437     1,476
   Exploration costs...................................      164        69
   Interest............................................      207       607
                                                        --------  --------
      Total costs and expenses.........................    5,983     5,030
                                                        --------  --------
  Income (loss) before income taxes and extraordinary
   gain................................................    7,817      (433)
  Income tax expense (benefit).........................     (787)       --
                                                        --------  --------
  Income (loss) before extraordinary gain..............    8,604      (433)
  Extraordinary gain, net of income taxes of $37 in
   1996(2).............................................    1,831        93
                                                        --------  --------
  Net income (loss)....................................   10,435      (340)
  Preferred stock dividends and accretion of Senior
   Preferred redemption value..........................  (19,247)  (17,353)
                                                        --------  --------
  Net loss applicable to common stock.................. $ (8,812) $(17,693)
                                                        ========  ========
  Net loss per share of common stock:
   Before extraordinary gain........................... $  (0.42) $  (0.71)
   Extraordinary gain..................................     0.07        --
                                                        --------  --------
   Net loss per share of Common Stock.................. $  (0.35) $  (0.71)
                                                        ========  ========
  Average common shares outstanding....................   24,956    25,105
  Cash dividends.......................................       --        --
  Capital expenditures................................. $  4,280  $  1,228
BALANCE SHEET DATA:
  Working capital (deficit)............................ $  1,015  $ (1,771)
  Property and equipment, net..........................   10,636     7,411
  Total assets.........................................   15,547     9,791
  Long-term debt.......................................    1,500     5,835
  Redeemable Senior Preferred Stock....................   80,726    61,737
  Stockholders' deficit................................  (69,676)  (61,134)
</TABLE>
--------
(1) 1996 includes net litigation settlement gain of $7,100,000.
(2) See Note 3 of TGX's Notes to Consolidated Financial Statements.
 
                                      53
<PAGE>
 
                          MANAGEMENT'S DISCUSSION AND
           ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS
 
YEARS ENDED DECEMBER 31, 1996 ("1996") AND DECEMBER 31, 1995 ("1995")
 
  General. The following discussion provides information which management
believes is relevant to an understanding and assessment of the Company's
results of operations and financial condition, and those presently known
events, trends or uncertainties that are reasonably likely to have a material
impact on the Company's future results of operations or financial condition or
that are reasonably likely to cause the historical financial statements not to
be necessarily indicative of future operating results or financial condition.
It should be read in conjunction with the unaudited consolidated financial
statements and related notes appearing elsewhere herein.
 
RESULTS OF OPERATIONS
 
  Consolidated revenues for 1996 totaled $13,800,000, an increase of
$9,203,000 or 200% from 1995 consolidated revenues of $4,597,000. The
substantial revenue increase for 1996 is due to the recognition of a net
litigation settlement gain of $7,100,000 related to the NFG Litigation, a non-
recurring item, and a $166,000 gain on property sales, combined with
improvements in operation areas as discussed below.
 
  Total costs and expenses for 1996 were $5,983,000, an increase of $953,000
or 19% over total costs and expenses for 1995 of $5,030,000. The 1996 expense
increase is primarily related to 1996 recapitalization costs incurred of
$440,000 and recognition in 1995 of $425,000 of receivable allowance
recoupment and $166,000 of franchise tax settlement, both non-recurring
benefits, which decreased general and administrative expense for 1995.
 
  Income (loss) before income taxes and extraordinary gain for 1996, including
the net litigation settlement gain of $7,100,000, was $7,817,000, as compared
to a $433,000 loss for 1995.
 
Revenues
 
  Revenues from oil and natural gas sales for 1996 were $5,059,000, an
increase of $1,448,000 or 40% over 1995 revenues of $3,611,000. The increase
in 1996 revenues was due to higher product prices and oil volumes. A summary
of oil and natural gas sales volumes and revenues for the respective years
follows with natural gas prices being reflected on a thousand cubic feet
("Mcf") and volumes on a thousand Mcf ("Mmcf") basis.
 
                      Summary of Oil Volumes and Revenues
 
<TABLE>
<CAPTION>
                                                           1996    1995   CHANGE
                                                          ------- ------- ------
<S>                                                       <C>     <C>     <C>
Oil revenues (in thousands).............................. $ 1,613 $ 1,081   49%
Oil sales volume (barrels)...............................  76,200  62,900   21%
Oil average sales price per barrel....................... $ 21.16 $ 17.19   23%
</TABLE>
 
                  Summary of Natural Gas Volumes and Revenues
 
<TABLE>
<CAPTION>
                                                           1996    1995   CHANGE
                                                          ------- ------- ------
<S>                                                       <C>     <C>     <C>
Natural gas revenues (in thousands)...................... $ 3,446 $ 2,530   36 %
Natural gas sales volume (Mmcf)..........................   1,542   1,701   (9)%
Natural gas average sales price per Mcf.................. $  2.24 $  1.49   50 %
</TABLE>
 
  On an equivalent unit basis (one barrel of oil equals six Mcf of natural gas
on a heating value basis), natural gas represents 77% of TGX's 1996 oil and
natural gas sales volumes and 68% of oil and natural gas revenues. Due to the
Company's production being heavily weighted toward gas, its revenues and cash
flow are significantly influenced by changes in gas prices. During 1996,
average gas prices increased to $2.24 or $0.75 per Mcf from the 1995 average
price of $1.49. Current period oil prices were also higher than the previous
period
 
                                      54
<PAGE>
 
by $3.96 per barrel. Higher oil and gas product prices contributed to an
increase in revenues for 1996 of $1,455,000.
 
  Natural gas sales volumes for 1996 were 1,542 Mmcf, down 9% from sales
reported in 1995 of 1,701 Mmcf, which included non-recurring adjustments of
220 Mmcf related to gas imbalance cash settlements and 149 Mmcf related to
well payout adjustments. Excluding 1995 gas balancing and payout adjustment
volumes, gas sales volumes for 1996 increased by 210 Mmcf or 16%. The Company
records gas revenues on the net sales method and thus revenues are recorded
when received or operations merit accrual. Oil volumes for 1996 were 76,200
barrels, up 21% over 1995 volumes of 62,900 barrels, which included non-
recurring payout volume adjustments of 7,600 barrels. Excluding the non-
recurring volumes recognized in 1995, oil volumes for 1996 increased 20,900
barrels or 38% as compared to the same period in 1995. The sales volume
increases for 1996, after excluding 1995 non-recurring volumes, reflect the
successful results of the Company's acquisition, drilling and workover
activity.
 
  Natural gas gathering revenues and equity earnings in Comite Field Plant
Venture increased by 11% to a combined total of $768,000 in 1996 as compared
to $694,000 in 1995. This increase is primarily attributable to recoupment of
previously deferred treating fees and higher per Mcf contract treating fees.
 
  On April 12, 1996 the Company entered into a Settlement Agreement with NFG
and the Public Service Commission of the State of New York. Pursuant to the
agreement, on April 19, 1996 TGX received $7,200,000 of gross settlement
proceeds from NFG and all parties to the settlement agreement dismissed all
claims and counterclaims against each other. In conjunction with the NFG
settlement, the Company recognized a net litigation settlement gain of
$7,100,000, after payment of $100,000 to a third party entitled to participate
in the proceeds. Pursuant to amended credit agreements with BMOF (See Note 3),
50% or $3,600,000 of the settlement proceeds were paid to BMOF in cancellation
and full payment of the non-recourse secured note. The Company also recognized
an extraordinary gain from debt forgiveness of $1,831,000, net of income taxes
of $37,000, in conjunction with the final payment. As a result of the NFG
proceeds, BMOF payment and payment to another third party entitled to
participate in the proceeds, the Company retained $3,500,000 of net litigation
settlement proceeds.
 
  For 1996, the Company recorded gains on property sales and other revenues of
$873,000 as compared to $292,000 for 1995. The 1996 gain on property sales of
$166,000 is primarily the result of the Company selling, in separate
transactions, marginal wells and an interest in a pipeline for gross sale
proceeds of $215,000 resulting in a net gain of $166,000 as compared to 1995's
gain on wells sold of $68,000. Other revenues for 1996 is comprised of take-
or-pay contract net settlement proceeds of approximately $110,000, net
settlement proceeds regarding fees on the pipeline interest sold in 1996 of
$218,000, dismissal of certain pre-petition liabilities, pursuant to the Plan
and statute of limitations, of $217,000 with the remaining amount being
primarily attributed to interest income. Included in 1995 other revenues is
$147,000 of interest attributed to a franchise tax settlement and
approximately $56,000 of gain recognized in the liquidation of various Company
managed limited partnerships. The limited partnership liquidation was
completed in late 1995.
 
Costs and Expenses
 
  Consolidated costs and expenses for 1996 increased by $953,000 or 19% to
$5,983,000 as compared to $5,030,000 for 1995. The increase in expenses was
primarily due to higher 1996 general and administrative expenses.
 
  For 1996, total operating expenses increased $141,000 or 11% to $1,417,000
as compared to $1,276,000 for 1995. Included in operating expenses are
workover costs, severance taxes and through wellhead production costs (lifting
costs).
 
  Workover costs for 1996 and 1995 totaled $252,000 and $274,000,
respectively, and primarily represent discretionary well production activities
that are implemented to enhance or increase production. A significant
 
                                      55
<PAGE>
 
portion of the workover costs incurred are related to the Company's major
field in Arkansas and resulted in significant increases in oil production.
Additional workovers are scheduled for 1997.
 
  Severance taxes for 1996 and 1995 were $234,000 and $202,000, respectively.
The increase in severance taxes is related to increased oil sales volumes and
oil and natural gas revenues due to higher prices.
 
  Excluding workover costs and severance taxes, 1996 and 1995 operating
expenses totaled $931,000 and $800,000, respectively, for production costs
through the wellhead. Operating expenses for 1996 were lower in the Company's
older fields due to the sale of marginal wells effective April 1, 1996, but
this was offset by the addition of new properties in 1996 and full current
period impact of late 1995 acquisitions. Production costs per equivalent Mcf
for 1996 was $0.46 as compared to $0.38 for 1995.
 
  Treating and transportation expenses in 1996 increased by $165,000 or 26% to
$794,000 as compared to 1995 cost of $629,000. These costs represent post
wellhead expenditures incurred to treat Company gas to comply with pipeline
specifications or to transport the gas to market. The 1996 increase is
primarily due to contract treating fee escalations and recognition of
previously deferred treating fees pursuant to an agreement. Treating and
transportation expenses for 1996 and 1995, per equivalent Mcf, were $0.40 and
$0.30, respectively.
 
  Depletion, depreciation, and amortization ("DD&A") expense in 1996 decreased
$9,000 or 1% to $964,000 from $973,000 in 1995 due primarily to a decrease in
the weighted average DD&A rate per equivalent Mcf. The weighted average DD&A
rate for 1996 decreased 4% to $0.46 per equivalent Mcf as compared to 1995's
rate of $0.48.
 
  Pursuant to successful efforts accounting, unsuccessful exploration costs
are expensed as opposed to capitalized. For 1996 such costs represented
activity on two gross wells (net .43) at a net cost to the Company of
$164,000. Exploration costs for 1995 of $69,000 represented activity on three
gross wells (net .46).
 
  General and administrative expenses in 1996 increased by $961,000 or 65% to
$2,437,000 from $1,476,000 in 1995 due primarily to expenses associated with
the Company's 1996 recapitalization efforts and 1995 benefiting from a
litigation receivable recoupment and franchise tax settlement, both non-
recurring benefits. General and administrative expenses for 1996 included
$440,000 of professional and other fees related to the previously announced
equity restructuring that would result in an exchange of the Senior Preferred
stock for new common stock while eliminating all existing preferred and common
shares. The Company plans on soliciting shareholder approval regarding this
equity restructuring in 1997. In 1995, the Company recognized a receivable
allowance recoupment of $425,000 in conjunction with litigation settlement
regarding affiliated receivables. Also, in 1995, the Company recognized a
reduction in franchise tax expense of $166,000 related to a settlement.
Excluding the 1996 equity restructuring costs and 1995 receivable allowance
recoupment and franchise tax settlement benefits, 1996 general and
administrative expenses decreased $70,000 as compared to 1995.
 
  Interest expense for 1996 decreased $400,000 or 66% to $207,000 from
$607,000 in 1995, primarily due to a decrease in borrowings outstanding.
Accrued interest pursuant to the nonrecourse BMOF note, which was payable in
kind through issuance of additional notes, decreased $333,000 in 1996 to
$132,000 as a result of final debt payment and forgiveness in April 1996.
Interest pursuant to the Company's secured facility also declined in 1996 due
to lower average debt outstanding. Included in 1996 and 1995 is approximately
$30,000 and $36,000, respectively, of amortization of credit facility
establishment costs which are being amortized over the remaining term of the
facility.
 
  Due to tax loss carryforwards, the Company currently pays federal
alternative minimum income taxes only. In conjunction with the recognition of
the litigation settlement and related tax gain resulting from the final BMO
debt settlement, the Company has estimated and accrued alternative minimum
income taxes in 1996 of $180,000, which includes $37,000 of income tax related
to the extraordinary gain. The tax expense recognized represents an effective
tax rate of approximately 2% on income before income taxes. In 1996, the
Company recognized a deterred tax asset of $930,000 based on current projected
benefit to be realized from existing tax loss carryforwards. The 1996 income
before income taxes and extraordinary gain of $7,817,000 included the one-time
benefits of the net litigation settlement gain of $7,100,000 and pre-petition
liability dismissal of $217,000 while
 
                                      56
<PAGE>
 
being reduced by $572,000 for non-recurring expenses related to equity
restructuring and BMOF note interest. Excluding these non-recurring items, the
Company had income before income taxes and extraordinary gain of $1,072,000
for 1996. As a result of the improvement in income for 1996 and current
projections for 1997 and 1998, the Company recognized a deferred tax asset of
$930,000, based on an estimated realization of 1997 and 1998 projected income
before taxes of approximately $2,700,000, at the Company's statutory tax rate
of 34%. The valuation of this asset was based on the Company's more likely
than not assessment of the effect of future oil and gas prices, including
seasonal price trend fluctuations, additional benefits to be derived from full
year 1996 producing property acquisitions and drilling activity, future
capital activity and continuation of the earnings trend of 1996 and other
factors unique to the Company. Due to the Company's limited history of
positive financial results and unpredictability of future oil and gas prices
and other factors, the Company limited its deferred tax asset realization to
1997 and 1998 projected benefits, conservatively adjusted, to be derived from
utilization of its loss carryforwards.
 
  Debt forgiveness for 1996 and 1995 resulted in the recognition of an
extraordinary gain of $1,831,000, net of income taxes of $37,000, and $93,000,
respectively. The 1996 gain is the result of payment of 50% of the NFG
Litigation gross proceeds or $3.6 million, pursuant to the amended credit
agreement, in full settlement of the BMOF note of $4,652,000 and related
accrued interest of $816,000. The BMOF debt forgiveness extraordinary gain of
$1,868,000 was reduced by related income taxes of $37,000. The 1995 gain of
$93,000 was derived from Administrative Note settlements and claim
forfeitures.
 
  Pursuant to the terms of the Plan, dividends for the Senior Preferred stock
are calculated at 10%, compounded annually and resulted in accrued but unpaid
dividends for 1996 of $12,873,000 as compared to $12,038,000 for 1995.
Dividends on the Old Preferred Stock were $270,000 for 1996 and 1995.
 
  The accretion of the Senior Preferred redemption value, a non-cash item, is
calculated based on the interest method. Accordingly, the amount of accretion
increased by 21% to $6,104,000 for 1996 as compared to $5,045,000 in 1995.
 
                              FINANCIAL CONDITION
 
  During 1996, the Company's capital expenditures totaled $4,280,000, an
increase of $3,052,000 from 1995 activity and were primarily related to
development drilling and producing well acquisition activity. The Company also
incurred workover costs of $252,000. The positive results of these
expenditures are reflected in the increased sales and reserve quantities
reported in 1996.
 
  At December 31, 1996, the Company had positive working capital of $1,015,000
which represents an increase of $2,786,000 from the prior year end working
capital deficit. The significant improvement in working capital is
attributable to the $3.5 million of net litigation settlement proceeds
retained by the Company after BMOF debt and other third party participation
payments and the inclusion of a $680,000 current deferred tax asset.
 
  As a result of the litigation settlement proceeds, in April 1996 the Company
paid $3,600,000 in full settlement of the $5,468,000 of BMOF debt, including
interest due of $816,000. The Company used a portion of the settlement
proceeds to retire $900,000 of Bank One credit facility borrowings then
outstanding. Late in 1996, the Company borrowed $1,500,000 under the Bank One
facility in connection with proved oil and gas property acquisitions. The Bank
One credit facility matures on June 30, 1999 and the interest rate is the
bank's stated rate plus 1.5%. The borrowing base under the current credit
facility at December 31, 1996 was $4,700,000 and is reduced monthly by
$100,000. The borrowing base is redetermined on a semi-annual basis or at any
time at Bank One's election. The credit facility is secured by substantially
all of the Company's assets and includes financial ratio and default covenants
standard to the industry.
 
                                      57
<PAGE>
 
  The Company has certain dividend and redemption obligations related to the
Senior Preferred shares. For financial reporting purposes, the Senior
Preferred shares have both debt and equity characteristics and, accordingly,
are not classified as a component of stockholders' equity. At December 31,
1996, the Senior Preferred redemption value and accrued dividends were
$87,886,000 and $53,294,000, respectively. These amounts, plus any additional
accrued dividends, must be satisfied before any value can be attributed to the
holders of Old Preferred and Common Stock.
 
  At December 31, 1996, the stockholders' deficit was $69,676,000. Due to the
dividend requirements for the Senior Preferred Stock and Old Preferred Stock
and accretion of the redemption value of Senior Preferred, if the proposed
equity restructuring is not consummated, it is probable that the Company's
stockholders' equity will remain a deficit for the foreseeable future.
 
                        LIQUIDITY AND CAPITAL RESOURCES
 
  For 1996, the Company's cash provided by operating activities was $8,199,000
and included net litigation settlement proceeds of $7,100,000 of which
$3,600,000 was paid to BMOF (See Note 3). Also, included in cash provided by
operating activities is approximately $691,000 of proceeds received from the
Company's 35% equity investment in the Comite Field Plant Venture. Primarily
as a result of the litigation settlement and recognition of a current deferred
tax asset, the Company had positive working capital of $1,015,000 at the end
of the current year.
 
  In 1996, the Company purchased, for cash, producing oil and gas properties,
through numerous transactions, for $2,932,000 with effective dates at various
times during the year. Of such purchases, $1,737,000, comprising eight
separate transactions, was acquired in December with effective dates at the
end of December 1996, resulting in no impact on 1996 revenues and expenses.
Had all 1996 properties purchased been acquired at the beginning of the years
presented, the impact on revenues and income before income taxes and
extraordinary gain would have been an increase of $1,030,000 and $520,000,
respectively for 1996 and $885,000 and $291,000, respectively, for 1995. Due
to the Company's tax loss position, income taxes on the pro forma income was
not material. The following table summarizes certain pro forma condensed
consolidated results of operations data that give effect to the 1996
acquisitions as if they had occurred on January 1, 1996 and 1995 (in
thousands).
 
<TABLE>
<CAPTION>
                                                                 YEAR ENDED
                                                                DECEMBER 31,
                                                              -----------------
                                                               1996      1995
                                                              -------  --------
<S>                                                           <C>      <C>
Total revenues............................................... $14,830  $  5,482
Income (loss) before income taxes and extraordinary gain.....   8,337      (142)
Net loss applicable to common stock.......................... $(8,292) $(17,402)
</TABLE>
 
  The Bank One credit facility has a current borrowing base of $4,700,000 with
$1,500,000 of borrowings outstanding at December 31, 1996. The Company has
letter of credit commitments totaling $92,000 outstanding under the credit
facility resulting in a year-end facility availability of $3,108,000. The
borrowing base is reduced monthly by $100,000 and all amounts borrowed are due
June 30, 1999. As a result of the Company's working capital position,
improving operating results and availability under the credit facility,
capital resources are deemed sufficient for current operating activities.
 
  The Company has no requirements to make payments on the Senior Preferred
share obligations until the year 2002. If the Company's planned Merger is
consummated, such Senior Preferred obligations will be eliminated.
 
  Pursuant to the terms of various agreements, the Company, as a working
interest owner, is responsible for marketing its share of natural gas
production from certain properties. If the Company is unable or unwilling to
 
                                      58
<PAGE>
 
market its share of natural gas production from a property, its under-produced
status is subject to balancing with other working interest owners who have
sold more than their proportionate share of natural gas production. On an
aggregate net basis for certain natural gas properties, it appears that the
Company is in an under-produced status of approximately 350,000 Mcf as of
December 31, 1996 and is currently recouping or attempting to settle its net
under-produced status. Any balancing recoupments or settlements, which will
typically be over an extended period of time, are not anticipated to be
material to future operating results.
 
  The Company anticipates that continued development drilling and workovers
will maintain or increase current production volumes. In addition, the Company
is continually evaluating opportunities for acquisition of producing
properties and currently intends to pursue future production volume and
reserve base growth through acquisitions. The current cash balance, projected
cash flows from existing properties and borrowings available under the
Company's current line of credit are considered adequate to fund future
capital growth plans. Effective implementation of the Company's development
and acquisition plans is expected to meet the Company's long-term operation
and liquidity requirements.
 
  Inflation and Changes in Prices. The Company's revenues have been and will
continue to be affected by changes in oil and natural gas prices which have
been unstable. For management purposes, the Company assumes that oil and
natural gas prices will escalate at 5% per annum and that costs and expenses
will escalate at 4% per annum. The principal effects of inflation on the
Company relate to the costs required to drill, complete and operate oil and
natural gas properties. Such costs have also been on a general downward trend
since the early 1980's due primarily to the industry-wide decrease in drilling
activity.
 
                                      59
<PAGE>
 
                  PROPOSALS 2 AND (A)--ELECTION OF DIRECTORS
 
  The number of directors has been fixed by the Board at five, pursuant to the
TGX Bylaws. At the time the TGX Bylaws were amended, five persons were elected
to the Board. Three members of the Board have resigned, and Mr. Gerlich has
been elected and thus two positions on the Board are currently vacant. At the
Meeting, shares of Common Stock, Old Preferred Stock and Senior Preferred
Stock represented by proxies will, unless otherwise specified, be voted for
the election of the nominees named below. Each nominee will serve until the
next annual meeting of TGX or until their respective successors are duly
elected and qualified. All directors are to be elected by all of the
stockholders voting in accordance with the TGX Certificate. The shares held by
the holders of the Senior Preferred Stock are entitled pursuant to the TGX
Certificate to cast 95% of the votes to be cast by all stockholders, and the
holders of the Senior Preferred Stock have, therefore, sufficient voting power
to elect all directors of TGX.
 
  The Board has nominated Jonathan P. Carroll, Michael A. Gerlich, David H.
Scheiber and Jeffrey E. Susskind (the "Nominees") for election as members of
the Board. Messrs Gerlich, Scheiber and Susskind currently serve as directors.
Although the Board does not contemplate that any of the Nominees will be
unable to serve, if such a situation arises before the Meeting takes place,
the persons named in the enclosed form of proxy will vote in accordance with
their best judgment for a substitute nominee.
   
  If the Merger is effected, the Nominees will be nominees for directors of
Sheridan.     
   
  For information regarding the proposed plan to provide employee and
nonemployee directors and officers of Sheridan with increased equity ownership
in Sheridan, see "Proposal (b)--1997 Flexible Incentive Plan" and "Proposal
(c)--Sheridan 1997 Nonemployee Director Stock Option Plan."     
 
  The following table sets forth for each nominee his name, age, principal
occupation and employment for the past five years, offices held with TGX and
the date he first became a director. Each of the directors may be contacted at
the Company's address set forth on the cover page of this Proxy
Statement/Prospectus and each is a citizen of the United States.
 
<TABLE>
<CAPTION>
                                       POSITION, PRINCIPAL OCCUPATION, BUSINESS      DIRECTOR
           NOMINEES            AGE         EXPERIENCE AND DIRECTORSHIPS HELD          SINCE
           --------            ---     ----------------------------------------      --------
 <C>                           <C> <S>                                               <C>
 Jonathan P. Carroll.........   35 Mr. Carroll is being nominated to serve on the        --
                                    Board for the first time. He is currently
                                    President of Enserch Energy Services, Inc., and
                                    has held this position since July 1995. From
                                    1991 until 1995 he was President and CEO of DGS
                                    Holdings Corp., an oil and gas operating
                                    company. He has also served as President of a
                                    privately owned investment management company.
                                    He was previously a Vice President at
                                    Manufacturers Hanover Bank and Head Trader in
                                    the Capital Markets Group of First Interstate
                                    Bank, Ltd.
 Michael A. Gerlich..........   42 Mr. Gerlich was elected Vice President and Chief    1997
                                    Financial Officer of the Company in December,
                                    1994. In April 1997 he was appointed interim
                                    President. From January 1993 until joining TGX,
                                    he owned and managed Chalk Hill Resources,
                                    Inc., an independent oil and gas investing and
                                    financial consulting company. Prior thereto, he
                                    was Executive Vice President from January 1989
                                    to December 1992 and Vice President of Finance
                                    from May 1982 to December 1988 for Trinity
                                    Resources, Inc., an independent public oil and
                                    gas company.
</TABLE>
 
                                      60
<PAGE>
 
<TABLE>   
<CAPTION>
                                      POSITION, PRINCIPAL OCCUPATION, BUSINESS     DIRECTOR
          NOMINEES            AGE        EXPERIENCE AND DIRECTORSHIPS HELD          SINCE
          --------            ---     ----------------------------------------     --------
 
 
<S>                           <C> <C>                                              <C>
David H. Scheiber...........   38 Consultant. From April 1996 through early May      1995
                                   1997 Mr. Scheiber was a principal of Chesapeake
                                   Bay Investors, L.L.C., an investment management
                                   company in Baltimore, Md. From September 1992
                                   to April, 1996, Mr. Scheiber was President of
                                   Cana Capital, LLC, an investment banking and
                                   financial services company located in Laguna
                                   Niguel, California. From September 1991 to
                                   August 1992, Mr. Scheiber was affiliated with
                                   Monitor Company, Inc., a management consulting
                                   firm headquartered in Boston, Massachusetts, as
                                   manager of their bankruptcy practice. Since
                                   April 1997 Mr. Scheiber has been a member of
                                   the Board of Directors of Tuneup Masters, Inc.
Jeffrey E. Susskind.........   42 Principal of Strome, Susskind Investment           1992
                                   Management, L.P., an investment management
                                   company in Santa Monica, California. Mr.
                                   Susskind previously was an investment manager
                                   with Kayne, Anderson & Co.
</TABLE>    
 
  Only those directors who are not employees of the Company are entitled to
receive a fee, plus reimbursement for reasonable travel expenses incurred in
conjunction with meetings. Under the Company's standard arrangement for
compensation of directors, directors receive a retainer fee of $833 per month
plus a meeting fee of $1,000 per day and $250 for each telephone meeting. The
monthly retainer fee is subject to forfeiture on a six-month prospective basis
if a director attends less than seventy-five percent (75%) of the meetings.
 
  Four meetings of the Board were held in the last fiscal year. No incumbent
director attended fewer than seventy-five percent (75%) of the meetings of the
Board held in the last fiscal year.
 
  The Board has a standing Audit Committee which met once during the last
fiscal year. The Audit Committee consists of Messrs. Scheiber and Susskind.
The Audit Committee assists the Board in fulfilling its fiduciary
responsibilities with respect to the accounting policies and reporting
practices of the Company and the sufficiency of the audits of all Company
activities. It is the Board's agent in ensuring the integrity of financial
reports of the Company, and the adequacy of disclosures to shareholders. The
Audit Committee is the focal point for communication between the directors,
the independent accountants and management as their duties relate to financial
accounting, reporting, and controls.
 
  The Board has a standing Compensation Committee which met once during the
last fiscal year, and consists of Messrs. Scheiber and Susskind, the
nonemployee directors. During the year the Compensation Committee consulted
with management regarding the compensation and benefits that are provided to
the directors, officers and employees of the Company.
 
  The Board has a standing Executive Committee which did not meet during the
last fiscal year. The Executive Committee is authorized to exercise all of the
powers of the Board of Directors except those not permitted by the General
Corporation Law of Delaware. In 1996, the Executive Committee consisted of
Messrs. Carpenter and Susskind.
 
                                      61
<PAGE>
 
                              EXECUTIVE OFFICERS
 
  For information regarding the executive officers of the Company. See
"Election of Directors," and "Risk Factors." Pursuant to the TGX Bylaws, the
officers serve at the discretion of the Board and may be removed, with or
without cause, at any time.
 
                             EMPLOYMENT AGREEMENTS
 
  Larry H. Carpenter, Chairman of the Board, President and Chief Executive
Officer of the Company, entered into an employment agreement (the "Employment
Agreement") with the Company in March 1992. Pursuant to the Employment
Agreement, for the period through November 1992, Mr. Carpenter acted as a
consultant to the Company and had an option to become a full-time employee,
President and member of the Board of Directors. In November 1992, Mr.
Carpenter exercised such option and, at that time, was elected President of
the Company and, pursuant to the Certificate of Incorporation, became a member
of the Board of Directors. Pursuant to the Employment Agreement, for a period
of three years ending March 30, 1995, Mr. Carpenter received compensation
equal to $175,000 per annum, plus discretionary bonuses as determined by the
Board of Directors. For 1993, the Board of Directors did not grant a
discretionary bonus. However, in February 1994, the Board of Directors granted
a bonus of $100,000 to Mr. Carpenter in connection with his efforts in
consummating the sale of the Company's New York and Ohio properties. In
addition, Mr. Carpenter in 1992 received 200,000 shares of Senior Preferred
Stock which vested over the term of the Employment Agreement. The Employment
Agreement also provided Mr. Carpenter with certain living expense allowances,
as well as benefits relating to moving expense, health and life insurance,
club membership and use of an automobile. On April 1, 1995, Mr. Carpenter and
the Company entered into an Employment Agreement covering a period of two
years ending March 31, 1997 ("New Employment Agreement"). Mr. Carpenter
received compensation of $225,000 per annum, plus discretionary bonuses as
determined by the Board of Directors. In 1995 the Board of Directors granted a
bonus of $75,000 related to 1994 results and an additional bonus of $50,000 in
1996 related to 1995 results. In addition, Mr. Carpenter received 200,000
shares of the Company's Senior Preferred Stock which vests over the initial
term of the New Employment Agreement. The New Employment Agreement also
provided Mr. Carpenter, at Company expense, benefits of health and life
insurance. In 1996, the Board of Directors granted a bonus of $50,000 related
to 1996 results and payable in January 1997. On February 10, 1997, Mr.
Carpenter resigned as President and CEO of the Company. Pursuant to a
Settlement Agreement, Release and Confidentiality Agreement entered into
between the Company and Mr. Carpenter, Mr. Carpenter has agreed to forfeit
100,000 shares of the Company's stock which would have become non-forfeitable
on April 1, 1997. In addition, he has resigned as an officer and director of
the Company, released the Company and others from all liabilities and has
agreed that he would not acquire or attempt to acquire or help others to
acquire any stock in the Company for a period of three years. Mr. Carpenter
has also agreed to consult with the Company for one year, on a limited basis.
In consideration for these agreements, the Company has paid to Mr. Carpenter
the sum of $225,000 and released him from all liabilities arising from his
employment with the Company.
 
                                      62
<PAGE>
 
                            EXECUTIVE COMPENSATION
 
  The following table sets forth certain information concerning the
compensation of the Chief Executive Officer of the Company, and of the
Company's most highly compensated executive officers (other than the CEO)
whose total annual salary and bonus exceeded $100,000, for each of the
Company's fiscal years ending December 31, 1996 and December 31, 1995.
 
                          SUMMARY COMPENSATION TABLE
 
<TABLE>
<CAPTION>
                                                      LONG TERM
                                                     COMPENSATION
                          ANNUAL COMPENSATION           AWARDS
                         -------------------------   ------------
          (A)             (B)   (C)         (D)           (E)             (F)
                                                      RESTRICTED
   NAME AND PRINCIPAL         SALARY                    STOCK         ALL OTHER
        POSITION         YEAR ($)(1)     BONUS ($)    AWARDS (#)   COMPENSATION ($)
   ------------------    ---- -------    ---------   ------------  ----------------
<S>                      <C>  <C>        <C>         <C>           <C>
Larry H. Carpenter(8)... 1996 225,000      50,000(5)        --           -0-
President & CEO          1995 209,000     125,000(3)   200,000(4)        -0-
Michael A. Gerlich...... 1996 120,000      12,000(5)        --           -0-
Vice-President & CFO     1995 107,000      10,000(3)    30,000(6)        -0-
Donald T. Duke(9)....... 1996 119,000(2)   25,000(5)                     -0-
Manager Oil and Gas      1995  48,500(7)   15,000(3)    20,000(6)        -0- 
 Operations                                                                  
</TABLE>
--------
(1) Includes perquisites and other benefits, unless the aggregate amount of
    such does not exceed the lesser of either $50,000 or 10% of the total
    annual salary and bonus reported for the named executive officer. See
    "Employment Agreements."
(2) Includes amounts paid as a consultant to officer.
(3) Of the bonus amount shown for Mr. Carpenter, $75,000 was granted in
    regards to 1994 accomplishments and paid in 1995. The remaining $50,000 is
    for 1995 accomplishments and was paid in January 1996. All of Mr.
    Gerlich's and Mr. Duke's bonus was granted and paid in January 1996.
(4) Of such award 100,000 are vested and the remaining 100,000 shares were
    subject to forfeiture. In February 1997 Mr. Carpenter resigned as CEO and
    these 100,000 shares were forfeited. See "Employment Agreements." As of
    December 31, 1995, there was limited trading in the Senior Preferred Stock
    and, therefore, the Company has utilized the price reflected in Schedule
    13-D filed on May 8, 1995 of $0.20 for stock compensation recognition
    purposes.
(5) Bonus was granted for 1996 accomplishments and was paid in January 1997.
(6) Of such award, 50% of the shares ceased to be subject to forfeiture on
    September 27, 1996 and the remainder were subject to forfeiture. Mr. Duke
    resigned in March 1997 and these 10,000 shares were forfeited. As of
    December 31, 1995, there was limited trading in the Series A Senior
    Preferred Stock and, therefore, the Company has utilized the price
    reflected in Schedule 13-D filed on May 8, 1995 of $0.20 for stock
    compensation recognition purposes.
(7) Represents amounts paid as a consultant.
(8) Mr. Carpenter resigned on February 10, 1997.
(9) Mr. Duke resigned on March 15, 1997.
 
                                      63
<PAGE>
 
COMPENSATION COMMITTEE INTERLOCKS AND INSIDER PARTICIPATION
 
  No nonemployee director is or has been an officer or employee of TGX or any
of its subsidiaries or had any relationship requiring disclosure pursuant to
Item 404 of the SEC Regulation S-K. No executive officer of TGX served as a
member of the Compensation Committee (or other board committee performing
similar functions or, in the absence of any such committee, the entire board
of directors) of another corporation, any of whose executive officers served
on the TGX Compensation Committee. No executive officer of TGX served as a
director of another corporation, one of whose executive officers served on the
TGX Compensation Committee. No executive officer of TGX served as a member of
the compensation committee (or other board committee performing equivalent
functions or, in the absence of any such committee, the entire board of
directors) of another corporation, one of whose executive officers served as a
director of TGX.
 
REPORT ON EXECUTIVE COMPENSATION
 
  We are pleased to present this report to stockholders on executive
compensation. This report summarizes the responsibilities of the Company's
nonemployee directors who act as a Compensation Committee (the "Committee")
although the Company has not formally established such a Committee. In
establishing the compensation policy and objectives that guide the development
and administration of the executive compensation program, and the basis on
which the compensation for the Chief Executive Officer, corporate officers and
other key executives was determined for the fiscal year ended December 31,
1996.
 
  During the fiscal year, the Committee was comprised of the following Board
members, all of whom were non-employee directors of the Company: Jeffrey E.
Susskind, and David H. Scheiber. The Committee's responsibilities are to
oversee the development and administration of the compensation program for
corporate officers and subsidiary presidents, and administer the executive
incentive and stock option plans. During fiscal year 1996, the Committee also
reviewed market compensation trends for outside directors.
 
  The objective of the executive compensation program is to create strong
financial incentive for corporate officers and managers to increase profits
and grow revenues. The following objectives guide the Committee in its
deliberations:
 
  . Provide a competitive compensation program that enables the Company to
    attract and retain key executives and Board members.
 
  . Assure a strong relationship between the performance results of the
    Company or subsidiary and the total compensation received.
 
  . Balance both annual and longer performance objectives of the Company.
 
  . Encourage executives to acquire and retain meaningful levels of equity
    ownership in the Company.
 
  . Work closely with the Chief Executive Officer to assure that the
    compensation program supports the management style and culture of the
    Company.
 
  In addition to normal employee benefits, the executive total compensation
program includes base salary, annual cash bonus compensation, and longer term
stock based grants and awards.
 
  Recent changes to the Internal Revenue Code (Section 162(m)) impose a
$1,000,000 limit, with certain exceptions, on the deductibility of
compensation paid to each of the five highest paid executives. In particular,
compensation that is determined to be "performance based" is exempt from this
limitation. To be "performance based," incentive payments must use
predetermined objective standards, limit the use of discretion in making
awards, and be certified by the Compensation Committee made up of "outside
directors." While the Committee intends to comply with the provisions of
Section 162(m) with respect to the longer term stock based incentives, it
believes that the use of discretion in evaluating the individual contributions
of corporate management is appropriate. As such, the Committee has taken no
action to comply with Section 162(m) with respect to annual incentive
payments. It is not anticipated that any executive will receive compensation
in excess of this limit
 
                                      64
<PAGE>
 
during fiscal years 1995 or 1996. The Committee will continue to monitor this
situation and will take appropriate action if it is warranted in the future.
 
  The Chief Executive Officer participates in the executive compensation
program described in this report.
 
  In establishing the total compensation program for Mr. Carpenter, the
Committee assessed the pay levels for CEOs in similar companies in the oil and
gas industry, the improvement in profit performance of the Company, and Mr.
Carpenter's efforts in seeking out growth opportunities for the Company,
supervising and managing the NFG Litigation and other litigation, and
controlling costs. For fiscal years 1996 and 1995, Mr. Carpenter received a
bonus incentive awards of $50,000 and $125,000, respectively. The 1995 bonus
incentive award includes $75,000 related to 1994 results but paid in 1995. In
February 1997, Mr. Carpenter resigned as President and CEO.
 
                                          Respectfully submitted,
 
                                          Jeffrey E. Susskind
                                          David H. Scheiber
 
                                      65
<PAGE>
 
STOCK BASED COMPENSATION
 
  Previously, the Company had adopted a key employee compensation package
which consisted of a Restricted Stock Plan, a Non-Qualified Stock Option Plan,
and an Incentive Stock Option Plan. Both the Non-Qualified Stock Option Plan
and the Incentive Stock Option Plan were terminated in 1991 pursuant to the
respective plan's provisions and no options under these plans can be issued or
are outstanding.
 
  Shares of common stock under the Restricted Stock Plan were granted free of
charge to the recipient in consideration for services rendered. Grants made
under the plan are subject to forfeiture, based on a formula, in the event the
recipient leaves the employment of the Company within three, four or five
years after the date of grant. The market value of the Common Stock on the
date of grant was charged to expense over a five-year period, regardless of
whether or not the shares are ultimately earned by the employee. The Company
has reserved 89,333 shares of Common Stock for issuance under the plan. From
1991 through 1996, no shares of common stock were issued to vested
participants pursuant to the plan and no new grants will be issued under this
plan.
 
  Non-qualified and incentive stock options were granted to selected key
employees at an exercise price equal to the market price of the shares of
common stock on the date of grant, and become exercisable over a five-year
period.
 
                            CERTAIN STOCK OWNED BY
                     PRINCIPAL STOCKHOLDERS AND MANAGEMENT
 
  The following table sets forth certain information regarding each person
known by the Company owning or entitled to own as the beneficial owner, more
than five percent (5%) of the Company's outstanding Common Stock, Senior
Preferred Stock or Old Preferred Stock as of March 31, 1997:
 
<TABLE>
<CAPTION>
                                                       AMOUNT AND
                                                         NATURE      PERCENT
          NAME AND ADDRESS                            OF BENEFICIAL    OF
        OF BENEFICIAL OWNER               CLASS         OWNERSHIP     CLASS
        -------------------          ---------------- -------------  -------
<S>                                  <C>              <C>            <C>
Liberty National Bank and Trust           Common        3,136,986(1)  12.6%
 Company of Oklahoma City
 Escrow Agent UA
 November 18, 1985, Templeton
 Energy,
 Inc./Temex Energy, Inc. and Escrow
 Agent for the benefit of certain
 claimants of Amarex, Inc.
 P.O. Box 25848
 Oklahoma City, Oklahoma 73125
Gaylon E. Simmons and                Senior Preferred     569,561     6.6%
 Gloria Annette Turner Simmons        Old Preferred       491,657     100%
 905 East Main Street
 Jonesboro, Louisiana 71251
Jeffrey and Janis Susskind           Senior Preferred   1,278,002     20.5%
 FBO The Susskind Family Trust
 100 Wilshire Blvd., 15th Floor
 Santa Monica, California 90401
The AIF-Lion Group                   Senior Preferred   1,823,000(2)  21.0%
 c/o Apollo Advisors, L.P.
 Two Manhattanville Road
 Purchase, New York 10577
</TABLE>
--------
(1) In connection with its acquisition of Amarex, Inc. which was consummated
    on December 5, 1985, the Company issued 11,475,000 shares of Common Stock
    into escrow with Liberty National Bank and Trust
 
                                      66
<PAGE>
 
    Company of Oklahoma City as escrow agent. Such shares are held by the escrow
    agent for the benefit of various classes of creditors of Amarex and its
    affiliates entitled to receive the shares under a Plan of Reorganization
    confirmed in Amarex's bankruptcy proceeding, and the shares have been and
    will continue to be distributed by the escrow agent from time to time as the
    various creditors' claims are adjudicated and allowed by the Bankruptcy
    Court. As of March 31, 1997, 3,136,986 shares remained in escrow. Pursuant
    to the agreement governing the administration of the escrow account, the
    escrow agent has agreed to cause the escrowed shares to be voted at any
    annual or special stockholders' meeting in accordance with the instructions
    of the Company.
(2) Such information has been supplied to the Company pursuant to Schedule 13D
    filed with the Securities and Exchange Commission on December 31, 1994, by
    AIF II, L.P., a Delaware limited partnership and Lion Advisors, L.P., a
    Delaware limited partnership (collectively the "Reporting Persons"). Such
    Reporting Persons may together constitute a "group" within the meaning of
    Rule 13D-5 under the Securities Exchange Act of 1934, as amended.
 
  The following table sets forth, as of March 31, 1997, the amount of the
Company's Common Stock or Senior Preferred Stock beneficially owned by each of
its directors, each executive officer named in the Summary Compensation Table,
and all directors and executive officers as a group, based upon information
obtained from such persons:
 
<TABLE>
<CAPTION>
                                          AMOUNT AND NATURE OF
                                          BENEFICIAL OWNERSHIP
                                 --------------------------------------
                                                              OPTIONS
                                                            EXERCISABLE PERCENT
               NAME OF                SOLE VOTING AND        WITHIN 60    OF
         INDIVIDUAL OR GROUP          INVESTMENT POWER         DAYS     CLASS(1)
         -------------------     -------------------------- ----------- -------
      <S>                        <C>                        <C>         <C>
      Larry H. Carpenter (2)...    200,000 Senior Preferred     -0-       2.3%
      David H. Scheiber........     10,000 Senior Preferred     -0-         *
      Jeffrey E. Susskind......  1,778,002 Senior Preferred     -0-      20.2%
      Michael A. Gerlich(3)....     30,000 Senior Preferred     -0-         *
      Donald T. Duke(4)........     10,000 Senior Preferred     -0-         *
      All Executive Officers
       and Directors as a group
       (5 persons).............  2,028,002 Senior Preferred     -0-      23.4%
</TABLE>
--------
 * Less than one percent.
(1) Unless otherwise indicated, the holders have sole voting and investment
    powers.
(2) Excludes the 100,000 shares forfeited pursuant to the terms of Mr.
    Carpenter's employment agreement, in February 1997, upon his resignation
    from the Company. See "Employment Agreement".
(3) Fifty percent of shares shown are subject to forfeiture until September
    27, 1997 per agreement.
(4) Excludes the 10,000 shares forfeited in March 1997 upon Mr. Duke's
    resignation from the Company.
 
                                      67
<PAGE>
 
              
           PROPOSAL (B)--SHERIDAN 1997 FLEXIBLE INCENTIVE PLAN     
 
GENERAL
   
  The Sheridan Board approved the Flexible Incentive Plan to become effective
as of the consummation of the Merger if the Merger Agreement is adopted,
subject to the approval of the stockholders of the Company. A copy of the
Flexible Incentive Plan is attached hereto as Appendix "F". The description of
the Flexible Incentive Plan contained herein is not intended to be complete
and is qualified in its entirety by reference to Appendix "F", which contains
the complete text of the Flexible Incentive Plan.     
   
  The purposes of the Flexible Incentive Plan are to enable Sheridan to
attract, motivate and retain highly talented officers, employees, non-employee
directors and consultants by enabling Sheridan to make awards that recognize
the creation of long-term value for Sheridan's stockholders and promote the
continued growth and success of Sheridan. To accomplish this purpose, the
Flexible Incentive Plan provides for the granting to eligible persons of stock
options, stock appreciation rights, restricted stock, performance awards,
performance stock, dividend equivalent rights or any combination thereof.     
 
AVAILABLE SHARES
   
  The aggregate number of shares of New Common Stock which may be issued under
the Flexible Incentive Plan (or with respect to which awards may be granted)
shall not exceed 450,000 shares. Shares issued under the Flexible Incentive
Plan may be either authorized and unissued New Common Stock or New Common
Stock held in or acquired for the treasury of Sheridan. Any shares of New
Common Stock subject to a stock option or stock appreciation right that are
not issued before the expiration of such awards, or any restricted stock or
performance shares that are forfeited, will again be available for award under
the Flexible Incentive Plan. If shares of New Common Stock are delivered to
Sheridan in payment of the exercise price with respect to any stock option
granted under the Flexible Incentive Plan, the number of shares available for
future awards under the Flexible Incentive Plan will be reduced only by the
net number of shares issued.     
 
PERSONS ELIGIBLE TO PARTICIPATE
   
  Eligibility for participation in the Flexible Incentive Plan is confined to
employees, non-employee directors and consultants of Sheridan and its
subsidiaries, as determined by the Compensation Committee (the "Committee") in
its sole discretion.     
 
ADMINISTRATION
 
  The Committee will administer the Flexible Incentive Plan and has broad
powers under the Flexible Incentive Plan to, among other things, administer
and interpret the Flexible Incentive Plan, establish guidelines for the
Flexible Incentive Plan's operation, select persons to whom awards are to be
made under the Flexible Incentive Plan, determine the types, sizes and
combinations of awards to be granted under the Flexible Incentive Plan and
determine other terms and conditions of an award. In addition, except as set
forth below under "Amendment and Termination," the Committee also has the
power to modify or waive restrictions or limitations on the exercisability of
awards and to accelerate and extend existing awards. The Committee may also
determine whether, and to what extent and under what conditions to provide
loans to eligible participants to purchase New Common Stock under the Flexible
Incentive Plan. In addition, the Committee has the power to modify the terms
of existing awards, including, in the case of stock options, the exercise
price thereof.
 
TYPES OF AWARDS
 
  The Flexible Incentive Plan provides for the grant of any or all of the
following types of awards: (1) stock options, including incentive stock
options and non-qualified stock options; (2) stock appreciation rights, either
in tandem with stock options or freestanding; (3) restricted stock awards; (4)
performance shares; (5) performance units; (6) dividend equivalent rights; and
(7) other stock-based awards. Each of these types of awards is discussed in
more detail below. Awards may be granted singly, in combination or in tandem,
as determined by the Committee. The specific amount of awards to be received
by or allocated to the officers or employees or any other participant under
the Flexible Incentive Plan is in the discretion of the Committee and is
therefore not determinable for future periods.
 
                                      68
<PAGE>
 
  Stock Options. Under the Flexible Incentive Plan, the Committee may grant
awards in the form of options to purchase shares of the New Common Stock.
Options may be in the form of incentive stock options or nonqualified stock
options. The Committee will, with regard to each stock option, determine the
number of shares subject to the option, the term of the option (which, for
incentive stock options, shall not exceed ten years), the exercise price per
share of stock subject to the option (which, for incentive stock options, must
be not less than the fair market value of the New Common Stock at the time of
grant), the vesting schedule (if any) and the other material terms of the
option. Any option granted in the form of an incentive stock option must
satisfy the applicable requirements of Section 422 of the Internal Revenue
Code of 1986, as amended. Non-qualified stock options may have an exercise
price that is less than fair market value (but not less than the par value of
the New Common Stock).
 
  The option price upon exercise may, to the extent determined by the
Committee at or after the time of grant, be paid by a participant in cash, in
shares of New Common Stock owned by the participant, in shares of stock
awarded under the Plan, including restricted stock, by a reduction in the
number of shares of New Common Stock issuable upon the exercise of the option
or by other consideration. The Committee may offer to buy an option previously
granted on such terms and conditions as the Committee shall establish. Options
may, at the discretion of the Committee, provide for "reloads," whereby a new
option is granted for the same number of shares as the number of shares of New
Common Stock or restricted stock used by the participant to pay the option
price upon exercise.
 
  Unless the Committee determines otherwise at the time of grant, the Flexible
Incentive Plan provides that upon termination of employment by reason of death
or disability, stock options, to the extent vested, will be exercisable for
one year or until the end of the option term, whichever is shorter. Unless the
Committee determines otherwise at the time of grant or thereafter, the
Flexible Incentive Plan provides that upon termination of employment for any
reason other than death or disability, stock options, to the extent vested,
will be exercisable for three months, or until the end of the option term,
whichever is shorter.
 
  Stock Appreciation Rights ("SARs"). The Flexible Incentive Plan authorizes
the Committee to grant SARs either with a stock option ("Tandem SARs") or
independent of a stock option ("Non-Tandem SARs"). An SAR is a right to
receive a payment either in cash or New Common Stock, as the Committee may
determine, equal in value to the excess of the fair market value of a share of
New Common Stock on the date of exercise over the reference price per share of
New Common Stock established in connection with the grant of the SAR. The
reference price per share covered by an SAR will be the per share exercise
price of the related option in the case of a Tandem SAR and will be a
percentage designated by the Committee of the per share fair market value of
the New Common Stock on the date of grant (or any other date chosen by the
Committee) in the case of a Non-Tandem SAR.
 
  A Tandem SAR may be granted at the time of the grant of the related stock
option or, if the related stock option is a non-qualified stock option, at any
time thereafter during the term of the stock option. A Tandem SAR generally
may be exercised only at the times and to the extent the related stock option
is exercisable. A Tandem SAR is exercised by surrendering the same portion of
the related option. A Tandem SAR expires upon the termination of the related
stock option.
 
  A Non-Tandem SAR will be exercisable as provided by the Committee and will
have such other terms and conditions as the Committee may determine. A Non-
Tandem SAR may have a term of no longer than ten years from its date of grant.
A Non-Tandem SAR is subject to acceleration of vesting or immediate
termination in certain circumstances, in the same manner as discussed above in
the case of stock options.
 
  The Committee is also authorized to grant "limited SARs," either as Tandem
SARs or Non-Tandem SARs. Limited SARs would become exercisable only upon the
occurrence of a "Change in Control" (as defined in the Flexible Incentive
Plan) or such other event as the Committee may designate at the time of grant
or thereafter.
 
  Restricted Stock Awards. The Flexible Incentive Plan authorizes the
Committee to grant awards in the form of restricted shares of New Common
Stock. These awards may be in such amounts and subject to such terms
 
                                      69
<PAGE>
 
and conditions as the Committee may determine, including without limitation,
the price (if any) to be paid by the recipient, the time or times within which
such awards may be subject to forfeiture, the vesting schedule (which may be
based on service, performance or other factors) and rights to acceleration of
vesting (including whether non-vested shares are forfeited or vested upon
termination of employment). The Committee may award performance-based shares
of restricted stock by conditioning the grant, vesting or the release,
expiration or lapse of restrictions of such restricted stock, or the
acceleration of any of such conditions, upon the attainment of specified
performance goals or such other factors as the Committee may determine.
 
  Performance Shares. The Flexible Incentive Plan permits the granting of
"performance shares," consisting of the right to receive New Common Stock,
restricted stock or cash of an equivalent value, as the Committee may
determine, at the end of a specified performance period established by the
Committee. These awards may be in such number of shares and subject to such
additional terms and conditions as the Committee may determine, including
without limitation, the criteria to be used to determine the vesting of
performance shares and whether performance shares are forfeited or vest upon
termination of employment during the performance period. The Committee may
condition the grant of performance shares upon the attainment of specified
performance goals, such as the Company's achievement of certain earnings
levels or the Company's performance (or the performance of its stock) measured
against the performance of its competition, or such other facts as the
Committee may determine.
 
  Performance Units. The Flexible Incentive Plan permits the granting of
"performance units," consisting of the right to receive a fixed dollar amount
payable in cash, New Common Stock or restricted stock, or any combination
thereof, as the Committee may determine, at the end of a performance cycle
established by the Committee. Except for the fact that the award is
denominated in dollars rather than shares, the provisions of the Flexible
Incentive Plan regarding performance units are substantially similar to those
regarding performance shares, as described above.
 
  Dividend Equivalent Rights. The Committee may in its discretion provide that
any stock option, restricted stock, performance shares or units or other
stock-based awards under the Flexible Incentive Plan may earn dividend
equivalent rights. In respect of any such award which is outstanding on a
dividend record date for New Common Stock, the Committee may credit a
participant with an amount equal to the cash or stock dividends or other
distributions that would have been paid on the shares of New Common Stock
covered by such award if such covered shares had been issued and outstanding
on such dividend record date. The rules and procedures governing the crediting
of dividend equivalent rights, including the timing, form of payment and
payment contingencies thereof, shall be established by the Committee.
 
  Other Stock-Based Awards. The Flexible Incentive Plan also permits other
awards of New Common Stock and other awards that are valued in whole or in
part by reference to, or are payable in cash or New Common Stock, or otherwise
based on New Common Stock. The terms and conditions of any such awards will be
determined by the Committee, including without limitation, the price, if any,
and the vesting schedule, if any. The Committee may provide for the grant of
New Common Stock under such an award upon the completion of a specified
performance period.
 
PAYMENT FOR AWARDS
   
  The purchase price of any shares of New Common Stock purchased pursuant to
the exercise of an award granted under the Flexible Incentive Plan shall be
payable in full on the exercise date in cash, by check, by surrender to
Sheridan of shares of New Common Stock of Sheridan registered in the name of
the participant, by delivery to Sheridan of such other lawful consideration as
the Committee may determine or by a combination of the foregoing. Any such
shares so surrendered shall be deemed to have a value per share equal to the
fair market value of a share of New Common Stock on such date.     
 
AMENDMENT AND TERMINATION
 
  The Committee may at any time, and from time to time, amend, in whole or in
part, any or all of the provisions of the Flexible Incentive Plan or suspend
or terminate it entirely, retroactively or otherwise; provided,
 
                                      70
<PAGE>
 
   
however, that unless otherwise required by law or specifically provided in the
Flexible Incentive Plan, the rights of a participant with respect to options
or other awards granted prior to such amendment, suspension or termination may
not be impaired without the consent of such participants; and, provided
further, that without the approval of the stockholders of Sheridan, no
amendment may be made which would materially increase the aggregate number of
shares of New Common Stock that may be issued under the Flexible Incentive
Plan; materially change the definition of employees eligible to receive awards
under the Flexible Incentive Plan; decrease the minimum option price permitted
under the Flexible Incentive Plan; or increase the ten-year maximum option
term permitted under the Plan.     
 
  No award or grant may be made under the Flexible Incentive Plan on or after
September 1, 2006 (the tenth anniversary of the effective date of the Plan).
 
  The Flexible Incentive Plan is not subject to any provision of ERISA and is
not qualified under Section 401(a) of the Internal Revenue Code of 1986.
 
  The Committee has not designated any persons to receive any awards under the
Flexible Incentive Plan.
 
  THE BOARD OF DIRECTORS RECOMMENDS THAT STOCKHOLDERS VOTE FOR THE APPROVAL OF
THE 1997 FLEXIBLE INCENTIVE PLAN. YOUR PROXY WILL BE SO VOTED UNLESS YOU
SPECIFY OTHERWISE.
 
                                 OTHER MATTERS
 
  As of the date of this statement, the Board has no knowledge of any business
which will be presented for consideration at the meeting other than the
election of directors and the proposed merger of the Company. Should any other
matters be properly presented, it is intended that the enclosed proxy will be
voted in accordance with the best judgment of the persons voting the matter.
 
                            INDEPENDENT ACCOUNTANTS
   
  Price Waterhouse LLP has been selected to serve as independent accountants
of the Company for the fiscal year ending December 31, 1997, and also served
as the independent accountants of the Company for the fiscal years ended
December 31, 1996 and 1995. Representatives of such firm are expected to be
present at the Meeting of Stockholders and the Sheridan Special Meeting. They
will have the opportunity to make a statement if they desire to do so, and are
expected to be available to respond to appropriate questions.     
 
                            STOCKHOLDER'S PROPOSALS
   
  Proposals of stockholders to be presented at either the TGX or Sheridan
Meeting of Stockholders to be held in 1997 must be received at the office of
the Secretary of the Company or Sheridan no later than December 31, 1996 in
order to be included in the applicable proxy statement and form of proxy
relating to that meeting.     
 
                                 LEGAL MATTERS
   
  The validity of the Sheridan Common Stock offered hereby and certain other
matters in connection with the Merger will be passed upon for Sheridan by its
counsel, Winstead Sechrest & Minick P.C., Houston, Texas.     
 
                                      71
<PAGE>
 
                                    EXPERTS
 
  The consolidated financial statements of TGX Corporation as of December 31,
1996 and 1995 and for each of the two years ended December 31, 1996 included in
this Registration Statement on Form S-4 have been so included in reliance on
the report of Price Waterhouse LLP, independent accountants, given on the
authority of said firm as experts in auditing and accounting.
 
                                          By Order of the Board of Directors
 
                                          Jeffrey E. Susskind
                                          Chairman of the Board
 
Houston, Texas
May 14, 1997
 
                                       72
<PAGE>
 
                         INDEX TO FINANCIAL STATEMENTS
 
<TABLE>
<S>                                                                         <C>
Report of Independent Accountants..........................................  F-2
Consolidated Balance Sheet.................................................  F-3
Consolidated Statement of Operations.......................................  F-4
Consolidated Statement of Cash Flows.......................................  F-5
Notes to Consolidated Financial Statements.................................  F-6
Unaudited Pro Forma Summary Condensed Combined Financial Information....... F-25
  Unaudited Pro Forma Condensed Balance Sheet Data......................... F-25
  Unaudited Pro Forma Condensed Statement of Operations Data............... F-25
Notes to Unaudited Pro Forma Condensed Combined Financial Information...... F-26
</TABLE>
 
                                      F-1
<PAGE>
 
                       REPORT OF INDEPENDENT ACCOUNTANTS
 
To the Board of Directors
and Stockholders of TGX Corporation
 
  In our opinion, the accompanying consolidated balance sheet and the related
consolidated statements of operations and of cash flows present fairly, in all
material respects, the financial position of TGX Corporation and its
subsidiaries (the Company) at December 31, 1996 and 1995, and the results of
their operations and their cash flows for the years then ended in conformity
with generally accepted accounting principles. These financial statements are
the responsibility of the Company's management; our responsibility is to
express an opinion on these financial statements based on our audits. We
conducted our audits of these statements in accordance with generally accepted
auditing standards which require that we plan and perform the audit to obtain
reasonable assurance about whether the financial statements are free of
material misstatement. An audit includes examining, on a test basis, evidence
supporting the amounts and disclosures in the financial statements, assessing
the accounting principles used and significant estimates made by management,
and evaluating the overall financial statement presentation. We believe that
our audits provide a reasonable basis for the opinion expressed above.
 
PRICE WATERHOUSE LLP
 
Houston, Texas
February 10, 1997, except
as to Note 14 which is
as of March 31, 1997.
 
                                      F-2
<PAGE>
 
                        TGX CORPORATION AND SUBSIDIARIES
 
                           CONSOLIDATED BALANCE SHEET
 
<TABLE>
<CAPTION>
                                                              DECEMBER 31,
                                                            ------------------
                          ASSETS                              1996      1995
                          ------                            --------  --------
                                                              (THOUSANDS OF
                                                             DOLLARS EXCEPT
                                                             FOR SHARE DATA)
<S>                                                         <C>       <C>
Current assets:
  Cash and cash equivalents................................ $  1,924  $    384
  Accounts receivable, net of allowance for doubtful
   accounts of $200 (1996) and $320 (1995).................    1,291     1,141
  Accounts receivable from affiliates......................       --         6
  Deferred tax asset.......................................      680        --
  Other current assets.....................................      117        51
                                                            --------  --------
    Total current assets...................................    4,012     1,582
                                                            --------  --------
Property and equipment:
  Oil and natural gas properties...........................   15,535    11,340
  Other property and equipment.............................      204       203
  Accumulated depletion, depreciation and amortization.....   (5,103)   (4,132)
                                                            --------  --------
    Property and equipment, net............................   10,636     7,411
                                                            --------  --------
Investment in Comite Field Plant Venture--Note 5...........      596       739
Deferred tax asset.........................................      250        --
Other assets...............................................       53        59
                                                            --------  --------
    Total other assets.....................................      899       798
                                                            --------  --------
TOTAL ASSETS............................................... $ 15,547  $  9,791
                                                            ========  ========
<CAPTION>
           LIABILITIES AND STOCKHOLDERS' DEFICIT
           -------------------------------------
<S>                                                         <C>       <C>
Current liabilities:
  Accounts payable and accrued liabilities--Note 6......... $  2,997  $  3,353
                                                            --------  --------
    Total current liabilities..............................    2,997     3,353
                                                            --------  --------
Long-term debt--Note 3.....................................    1,500     5,835
                                                            --------  --------
    Total liabilities......................................    4,497     9,188
                                                            --------  --------
Commitments and contingencies--Note 4
Redeemable Senior Preferred Stock, 8,788,571 (1996) and
 8,851,360 (1995) shares outstanding; redemption value
 $87,886 (1996) and $88,514 (1995)--Note 7.................   80,726    61,737
                                                            --------  --------
Stockholders' deficit--Note 8
  9% Cumulative Convertible Preferred Stock, 300,000 shares
   outstanding plus 185,000 (1996) and 158,000 (1995)
   shares to be issued for dividends.......................      485       458
  Common stock, 24,955,807 (1996) and 24,956,033 (1995)
   shares outstanding......................................      290       290
  Additional paid-in capital...............................    1,665     1,422
  Accumulated deficit......................................  (72,116)  (63,304)
                                                            --------  --------
    Total stockholders' deficit............................  (69,676)  (61,134)
                                                            --------  --------
TOTAL LIABILITIES AND STOCKHOLDERS' DEFICIT................ $ 15,547  $  9,791
                                                            ========  ========
</TABLE>
 
          See accompanying notes to consolidated financial statements.
 
                                      F-3
<PAGE>
 
                        TGX CORPORATION AND SUBSIDIARIES
 
                      CONSOLIDATED STATEMENT OF OPERATIONS
 
<TABLE>
<CAPTION>
                                                          FOR THE
                                                        YEARS ENDED
                                                       DECEMBER 31,
                                                     ------------------
                                                       1996      1995
                                                     --------  --------
                                                       (THOUSANDS OF DOLLARS
                                                      EXCEPT PER SHARE DATA)
<S>                                                  <C>       <C>       <C> <C>
REVENUES
Oil and natural gas sales..........................  $  5,059  $  3,611
Natural gas gathering..............................       220       245
Equity earnings in Comite Field Plant Venture......       548       449
Litigation settlement gain, net--Note 3............     7,100        --
Gain on property sales.............................       166        68
Other, net.........................................       707       224
                                                     --------  --------
                                                       13,800     4,597
                                                     --------  --------
COSTS AND EXPENSES
Operating expenses.................................     1,417     1,276
Treating and transportation expenses...............       794       629
Depletion, depreciation and amortization...........       964       973
Exploration costs..................................       164        69
General and administrative expenses................     2,437     1,476
Interest...........................................       207       607
                                                     --------  --------
                                                        5,983     5,030
                                                     --------  --------
INCOME (LOSS) BEFORE INCOME TAXES AND EXTRAORDINARY
 GAIN..............................................     7,817      (433)
Income tax expense (benefit)--Note 9:
  Current..........................................       143        --
  Deferred.........................................      (930)       --
                                                     --------  --------
                                                         (787)       --
                                                     --------  --------
INCOME (LOSS) BEFORE EXTRAORDINARY GAIN............     8,604      (433)
Extraordinary gain, net of income taxes of $37 in
 1996--Note 3......................................     1,831        93
                                                     --------  --------
NET INCOME (LOSS)..................................    10,435      (340)
Preferred stock dividends..........................   (13,143)  (12,308)
Accretion of Senior Preferred redemption value.....    (6,104)   (5,045)
                                                     --------  --------
NET LOSS APPLICABLE TO COMMON STOCK................  $ (8,812) $(17,693)
                                                     ========  ========
NET INCOME (LOSS) PER SHARE OF COMMON STOCK:
  Before extraordinary gain........................  $  (0.42) $  (0.71)
  Extraordinary gain...............................      0.07        --
                                                     --------  --------
NET LOSS PER SHARE OF COMMON STOCK.................  $  (0.35) $  (0.71)
                                                     ========  ========
AVERAGE COMMON SHARES OUTSTANDING..................    24,956    25,105
                                                     ========  ========
</TABLE>
 
          See accompanying notes to consolidated financial statements.
 
                                      F-4
<PAGE>
 
                        TGX CORPORATION AND SUBSIDIARIES
 
                      CONSOLIDATED STATEMENT OF CASH FLOWS
 
<TABLE>
<CAPTION>
                                                           FOR THE
                                                         YEARS ENDED
                                                        DECEMBER 31,
                                                       ----------------
                                                        1996     1995
                                                       -------  -------
                                                       (THOUSANDS OF DOLLARS)
<S>                                                    <C>      <C>      <C> <C>
Cash flows from operating activities:
  Net income (loss) .................................  $10,435  $  (340)
  Adjustments to reconcile net income (loss) to cash
   provided by operating activities:
   Depletion, depreciation and amortization..........      964      973
   Amortization of debt transaction costs and stock
    compensation.....................................       55       79
   Gain on property sales............................     (166)     (68)
   Distributions in excess of equity earnings........      143      139
   Interest to be paid through issuance of additional
    notes............................................      132      465
   Extraordinary gain................................   (1,868)     (93)
   Changes in operating assets and liabilities:
    Decrease (increase) in accounts receivable.......     (150)      65
    Decrease in accounts due from/to affiliates, net.        6      256
    Increase in deferred tax asset...................     (680)      --
    Decrease (increase) in other current assets......      (66)       9
    (Decrease) increase in accounts payable and
     accrued liabilities.............................     (356)       1
   Deferred tax asset................................     (250)      --
                                                       -------  -------
Net cash provided by operating activities............    8,199    1,486
                                                       -------  -------
Cash flows from investing activities:
  Capital expenditures...............................   (4,280)  (1,228)
  Proceeds from disposal of assets...................      215      168
  Decrease (increase) in other assets................       (7)      --
                                                       -------  -------
  Net cash provided by (used in) investing
   activities........................................   (4,072)  (1,060)
                                                       -------  -------
Cash flows from financing activities:
  Principal payments of long-term debt and notes
   payable...........................................   (4,500)  (1,601)
  Advances pursuant to revolving credit facility.....    1,900      850
  Debt transaction costs and other...................       13       33
                                                       -------  -------
  Net cash used in financing activities..............   (2,587)    (718)
                                                       -------  -------
Net increase (decrease) in cash and cash equivalents.    1,540     (292)
Cash and cash equivalents at beginning of period.....      384      676
                                                       -------  -------
Cash and cash equivalents at end of period...........  $ 1,924  $   384
                                                       =======  =======
Supplemental Disclosure of Non-Cash Investing and
 Financing Activities:
  Forgiveness of bank debt and other notes payable...  $ 1,868  $    93
  Interest to be paid through issuance of additional
   notes.............................................  $   132  $   465
</TABLE>
 
          See accompanying notes to consolidated financial statements.
 
                                      F-5
<PAGE>
 
                       TGX CORPORATION AND SUBSIDIARIES
 
                  NOTES TO CONSOLIDATED FINANCIAL STATEMENTS
 
1. SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES
 
 Business and Reorganization Proceeding
 
  TGX Corporation ("TGX") (collectively with its subsidiaries, the "Company"),
is a domestic independent energy company engaged in the production of oil and
natural gas. The Company is also engaged in intrastate natural gas gathering
and treating.
 
  As discussed in Note 2, on February 22, 1990, TGX filed a voluntary petition
for reorganization pursuant to Chapter 11 of the Bankruptcy Code. TGX's then
wholly owned subsidiaries, LEDCO, TGX Finance Corporation, Diablo Farms, Inc.,
and Templeton Energy Income Corporation, did not file petitions for
reorganization under the Bankruptcy Code nor did any of the limited or general
partnerships for which TGX served as general partner. On January 7, 1992, the
Bankruptcy Court confirmed an Amended Plan of Reorganization (the "Plan") for
TGX and on October 2, 1992 an order of substantial consummation regarding the
Plan became final and nonappealable. Accordingly, the Company implemented
fresh start reporting as of October 2, 1992.
   
  During 1996, the Company commenced efforts to effect a recapitalization by
merging with and into its wholly-owned subsidiary, Sheridan Energy, Inc.
("Sheridan"). Sheridan was incorporated in 1996 solely to accomplish the
planned merger. Sheridan has no independent operations of its own and will
conduct the operations of TGX, as the surviving corporation, if the merger is
consummated.     
 
 Principles of Consolidation
 
  The accompanying consolidated financial statements include the accounts of
TGX and its subsidiaries. All significant intercompany accounts and
transactions have been eliminated. The Company accounts for its investments in
limited and general partnerships under the proportionate consolidation method.
Under this method, the Company's financial statements include its pro-rata
share of assets, liabilities, revenues, and expenses of the limited and
general partnerships in which it owns beneficial interests. At year end 1995,
all Company sponsored partnerships had been liquidated. The Company's 35%
investment in a natural gas treating plant is accounted for using the equity
method.
 
 Oil and Natural Gas Properties
 
  In conjunction with the implementation of fresh start reporting, as
described in Note 2, the Company also implemented the successful efforts
method of accounting for oil and natural gas operations. Under the successful
efforts method, capitalized costs relating to proved properties are amortized
using the unit-of-production method based on estimated proved reserves. The
cost of unsuccessful exploration wells is charged to operations. If an
assessment indicates that an unproved property has been impaired, a loss is
recognized by providing a valuation allowance. Net capitalized costs in excess
of future net revenues, adjusted for tax effects, are charged to operations in
the year during which such excess occurs. Generally, a gain or loss is
recognized on the disposition of a property.
 
  The Company adopted Statement of Financial Accounting Standards ("SFAS") No.
121, "Accounting for the Impairment of Long-Lived Assets and for Long-Lived
Assets to be Disposed Of" in the fourth quarter of 1995. Under the provisions
of the statement, if the net book value of an individual asset is greater than
its undiscounted future net cash flows, then the excess of the net book value
over the fair value is recognized as an impairment of the asset. This adoption
had no effect on the Company's 1996 or 1995 financial statements.
 
                                      F-6
<PAGE>
 
                       TGX CORPORATION AND SUBSIDIARIES
 
            NOTES TO CONSOLIDATED FINANCIAL STATEMENTS--(CONTINUED)
 
 Other Property and Equipment
 
  Depreciation of other property and equipment is provided on the straight-
line method over the estimated useful lives of the related assets, which range
from 3 to 25 years.
 
 Revenue Recognition
 
  Revenue from the sale of crude oil is recognized upon the passage of title,
net of royalties. Revenue from natural gas production is recognized using the
sales method, net of royalties. Pursuant to the terms of various agreements,
the Company, as a working interest owner, is responsible for marketing its
share of natural gas production from certain properties. If the Company is
unable or unwilling to market its share of natural gas production from a
property, its under-produced status is subject to balancing with other working
interest owners who have sold more than their proportionate share of natural
gas production. On an aggregate net basis for certain natural gas properties,
it appears that the Company is in an under-produced status of approximately
350,000 Mcf as of December 31, 1996 and is currently recouping or attempting
to settle its net under-produced status. Any balancing recoupments or
settlements, which will typically be over an extended period of time, are not
anticipated to be material to future operating results.
 
 Stock Based Compensation
 
  In October 1995, the Financial Accounting Standards Board issued Statement
of Financial Accounting Standards No. 123 "Accounting for Stock Based
Compensation" ("SFAS No. 123"). SFAS No. 123 establishes a fair value method
of accounting and reporting for awards granted after December 15, 1995 under
stock compensation plans. SFAS No. 123 encourages, but does not require,
companies to adopt the fair value method of accounting in place of the
existing method of accounting for stock-based compensation for employees
whereupon compensation costs are recognized only in situations where stock
compensation plans award intrinsic value to recipients at the date of grant.
Companies that do not adopt the fair value method of accounting prescribed in
SFAS No. 123 must, nonetheless, make annual pro forma disclosures of the
estimated effects on net income and earnings per share in their year-end 1996
financial statements as if the fair value method had been used for grants
after December 31, 1994. The Company has elected to follow the accounting
prescribed by Accounting Principles Board Opinion No. 25 "Accounting for Stock
Issued to Employees", as allowed by SFAS No. 123.
 
 Cost and Expense Reimbursements
 
  Pursuant to the provisions of the applicable agreements, the Company reduced
certain of its costs and expenses by reimbursements for certain administrative
and operating costs paid or incurred in connection with the administration and
supervision of certain oil and natural gas properties and limited and general
partnerships which are sponsored by the Company. During late 1995 all Company
sponsored partnerships were liquidated through third party sales.
 
 Per Share Amounts
 
  Per share amounts are determined by dividing net income or loss applicable
to Common Stock by the weighted average number of common shares outstanding
during the year. In 1996 and 1995, the dilutive effect, if any, of the assumed
conversion of preferred stock to common stock was considered for the
computation of fully diluted income or loss per common share and such assumed
conversion was not material to the computation. The assumed exercise of
outstanding stock options was not included in the computation of per share
amounts as their effect was not dilutive.
 
                                      F-7
<PAGE>
 
                       TGX CORPORATION AND SUBSIDIARIES
 
            NOTES TO CONSOLIDATED FINANCIAL STATEMENTS--(CONTINUED)
 
 Cash and Cash Equivalents
 
  Cash includes cash on-hand and cash in interest bearing accounts with
original maturities of 90 days or less.
 
 Accounting Estimates
 
  The preparation of the Company's financial statements in conformity with
generally accepted accounting principles requires the Company to make certain
estimates and assumptions that affect the reported amounts of assets and
liabilities and the disclosure of contingent assets and liabilities and the
periods in which certain items of revenue and expense are included. Actual
results may differ from such estimates.
 
 Reclassifications
 
  Certain amounts from prior years have been reclassified to conform to the
current year presentation.
 
2. REORGANIZATION PROCEEDING
 
  On February 22, 1990, TGX filed a voluntary petition in the United States
Bankruptcy Court for the Western District of Louisiana, Shreveport Division
(the "Bankruptcy Court"), for reorganization pursuant to Chapter 11, Title 11
of the United States Code (the "Reorganization Proceeding"). On January 7,
1992, the Bankruptcy Court confirmed an Amended Plan of Reorganization
("Plan") for TGX, and the confirmation order became effective on January 21,
1992 (the "Effective Date"). On September 21, 1992, the Bankruptcy Court
determined that the Plan had been substantially consummated, and the
Bankruptcy Court's order of substantial consummation became final and
nonappealable on October 2, 1992.
 
  As a result of the substantial consummation of the Plan and due to (i) the
reallocation of the voting rights of equity interests owners and (ii) the
reorganization value of TGX's assets being less than the total of all post-
petition liabilities and allowed claims at October 2, 1992, the effects of the
Reorganization Proceeding were accounted for in accordance with the fresh
start reporting standards promulgated under the American Institute of
Certified Public Accountants Statement of Position 90-7 "Financial Reporting
by Entities in Reorganization Under the Bankruptcy Code".
 
  In conjunction with implementing fresh start reporting, a reorganization
value ("RV") of the Company's assets and liabilities as of October 2, 1992 was
determined by management in the following manner:
 
  The RV of proved oil and natural gas properties and other related assets
  was determined based on future net revenues discounted to present value
  utilizing a rate of 20%. For proved undeveloped properties, the RV was
  determined to be 50% of discounted future net revenues. For the purpose of
  calculating future net revenues of oil and natural gas properties, then
  current oil and natural gas prices were escalated at five percent per annum
  to certain maximum amounts and then current operating costs and expenses
  were escalated at four percent per annum for the economic life of the
  properties. The initial price for natural gas dedicated under the contract
  (the "Contract") with National Fuel Gas Distribution Corporation ("NFG"),
  which was a matter being litigated (See Note 4), was equal to 90% of the
  rolling twelve month average price for No. 6 fuel oil in the Buffalo, New
  York area (the "90% of No. 6 Fuel Oil Price"). The RV of oil and natural
  gas properties also included $2,905,000 attributable to the difference,
  plus interest, between the price that NFG paid since September 1984 and the
  90% of No. 6 Fuel Oil Price.
 
  Current assets and liabilities were recorded at book value which
  approximates RV. Long-term liabilities were recorded at present values of
  amounts to be paid and the pre-consummation stockholders' deficit was
  adjusted to reflect the par value of pre-consummation equity interests.
 
                                      F-8
<PAGE>
 
                       TGX CORPORATION AND SUBSIDIARIES
 
            NOTES TO CONSOLIDATED FINANCIAL STATEMENTS--(CONTINUED)
 
  The recorded value of the Series A Senior Preferred Stock (the "Senior
  Preferred") issued pursuant to the Plan was determined based on the
  difference between the RV of the Company's assets less the sum of (i) the
  present value of liabilities plus (ii) the par value of pre-consummation
  equity interests. The accretion of the difference between the recorded
  value and the $10 per share redemption amount of the Senior Preferred is
  recorded as a reduction of income applicable to common stockholders over a
  period of approximately 10 years.
 
  The RV was determined by management on the basis of its best judgment of
what it considered to be the fair market value ("FMV") of the Company's assets
and liabilities at the time of the valuation, after reviewing relevant facts
concerning the price at which similar assets were being sold between willing
buyers and sellers. However, there can be no assurances that the RV and the
FMV were comparable and the difference between the Company's calculated RV and
the FMV could, in fact, have been material.
 
  Pursuant to the provisions of the Plan, TGX provided for (i) the payment in
full of its secured debt by the issuance of new notes pursuant to the terms of
a restructured credit agreement, (ii) the conversion of substantially all of
its unsecured debt into two different series of preferred stock, (iii) tax and
priority and certain other specified classes of claims and interests arising
from options for common stock being paid in cash, retained or otherwise
provided for, and (iv) administrative claims being paid in cash or otherwise
being satisfied.
 
  Three of the large administrative claimants (the "Opposing Administrative
Claimants") agreed that in full satisfaction of the balance of their
administrative claims they would receive (i) a payment of $300,000 (ii) 55,000
shares of Senior Preferred and (iii) the conveyance of approximately 29,400
acres of undeveloped land in Culberson and Hudspeth Counties, Texas. In
satisfaction of their unpaid administrative claims, all other administrative
claimants received cash and/or were entitled to receive promissory notes due
December 31, 1994 which were secured by certain assets of the Company. Such
notes were issued upon the execution of releases in favor of the Company and
others. As set forth in Note 3 below, all administrative notes were ultimately
settled through whole or partial repayment in cash, issuance of shares of
Senior Preferred and issuance of a non-recourse note payable out of proceeds
from the NFG Litigation described in Note 4 below.
 
  TGX was a party to numerous executory contracts which, pursuant to the
provisions of the Bankruptcy Code, could be assumed or rejected by TGX. If an
executory contract was assumed by TGX, all defaults related to the executory
contract were cured (generally, paid-in-full with cash). At December 31, 1995,
the aggregate balance of pre-petition obligations related to assumed executory
contracts was approximately $317,000 and represented undistributed net oil and
gas revenues in a "suspended pay" status. Pursuant to the Plan and statue of
limitations, the "suspended pay" liability was dismissed during 1996. If an
executory contract was rejected by TGX, all claims related to the executory
contract were satisfied pursuant to the terms of the Plan.
 
  As of the Effective Date of the Plan, the preferred and common stockholders
selected a new Board of Directors to serve until January 1995, or until their
successors were duly elected and qualified. When new directors are elected,
the Plan provides that directors are to be elected without regard to class
representation. However, holders of Senior Preferred have 95% of the voting
power of the Company and a plurality of such holders can, therefore,
effectively elect all Directors. In addition, to whatever number of directors
is provided for in the Company's by-laws, two additional directors are to be
elected solely by the Senior Preferred Stockholders until the Company has made
up its dividend arrearages.
 
  The Senior Preferred has a $10 per share redemption value and has a
provision for a 10% annual compounded cash dividend, payable quarterly,
provided however, that the payment of such dividend does not violate Delaware
law or certain loan covenants. The Company has not paid any of the dividends
since the Effective Date of the Plan and based on the current financial
position of the Company, does not expect to make any such dividend payments in
the near future. Subject to Delaware law, the Senior Preferred must be
redeemed no later than January 21, 2002.
 
                                      F-9
<PAGE>
 
                       TGX CORPORATION AND SUBSIDIARIES
 
            NOTES TO CONSOLIDATED FINANCIAL STATEMENTS--(CONTINUED)
 
3. LONG-TERM DEBT AND NOTES PAYABLE
 
  As of December 31, 1996 and 1995, the components of long-term debt were:
 
<TABLE>
<CAPTION>
                                                                1996   1995
                                                               ------ ------
                                                                (IN THOUSANDS)
      <S>                                                      <C>    <C>    <C>
      Bank borrowings:
      Revolving credit facility (secured)..................... $1,500 $  500
      Nonrecourse note........................................     --  5,335
      Less current maturities.................................     --     --
                                                               ------ ------
        Long-term debt........................................ $1,500 $5,835
                                                               ====== ======
</TABLE>
 
  On July 13, 1994, the Company entered into a series of agreements with Bank
One, Texas N.A. ("Bank One") whereby the Company's then outstanding secured
debt with the Bank of Montreal ("BMO") was restructured and all existing BMO
events of default were resolved. Pursuant to the restructuring, Bank One
established a borrowing-based facility of $2,350,000 under which the Company
immediately borrowed $1,600,000 of which $1,452,000 was paid to BMO. The Bank
One facility initially bore interest at Bank One's stated rate plus 2% and was
to mature on July 13, 1997. The Bank One facility is secured by substantially
all of the Company's oil and gas properties. Effective September 30, 1996, the
credit facility was amended and the borrowing base was increased to
$5,000,000, with monthly borrowing base reductions of $100,000, interest rate
lowered to stated rate plus 1.5% and the maturity extended to June 30, 1999.
The Bank One facility at December 31, 1996 had a borrowing base of $4,700,000
and is redetermined every six months or at Bank One's discretion. Due to the
excess of borrowing base over year end borrowings outstanding and the current
monthly facility reduction rate, no current maturities for debt are reflected.
The Bank One facility requires the maintenance of certain financial ratios
including a working capital ratio, after excluding certain liabilities and
other adjustments as allowed under the facility, of 1 to 1, a tangible net
worth, including Senior Preferred stock, of a minimum of $5,000,000, a future
annual limit on general and administrative expense of $1,700,000 and other
financial ratios.
 
  Simultaneously with the securance of the Bank One facility, BMO released all
of its liens on the Company's properties with the exception of its lien on the
Company's litigation with National Fuel Gas Distribution Corporation ("NFG
Litigation"). See Note 4 below.
 
  Prior to restructuring its debt through establishment of the Bank One
facility, the Company had been subject to the terms of an Amended and Restated
Credit Agreement (the "Amended Credit Agreement") with BMO which was entered
into in February 1992 and amended thereafter and which essentially continued
and preserved the prior revolving credit agreement. Effective December 31,
1992, the Company had been notified by BMO that an event of default had
occurred under the Amended Credit Agreement, and as a result, BMO had the
right to take certain actions under such Amended Credit Agreement including,
but not limited to, the acceleration of all of the then outstanding BMO
obligations.
 
  In January 1994, in conjunction with the Company's sale of certain assets,
the Company made a debt service payment of approximately $14,300,000 to BMO.
As set forth above, in July 1994, in connection with the series of agreements
entered into between the Company and Bank One, the Company paid approximately
$1,452,000 to BMO and simultaneously therewith, BMO released all of its liens
on the Company's properties with the exception of its lien on the Company's
NFG Litigation. As part of the loan restructuring, BMO converted $4,652,000
(the "BMOF Principal") of its outstanding indebtedness, including fees and
expenses, to a nonrecourse note secured only by the NFG Litigation and any
proceeds that might be received therefrom. BMO assigned its rights to the
loan, security, and the Company's note to BMO's wholly owned subsidiary, BMO
Financial, Inc. ("BMOF"). As of December 31, 1995, total accrued interest
pursuant to the BMOF note was $683,000, payable through the issuance of
additional notes, resulting in a total year-end BMOF debt of $5,335,000. On
December 31, 1995, the Company and BMOF executed
 
                                     F-10
<PAGE>
 
                       TGX CORPORATION AND SUBSIDIARIES
 
            NOTES TO CONSOLIDATED FINANCIAL STATEMENTS--(CONTINUED)

the first amendment to the credit agreement. Pursuant to the amended
agreement, TGX and BMOF were to share equally any NFG Litigation proceeds up
to $8,000,000. BMOF was to receive 100% of any proceeds in excess of
$8,000,000 until the total received by BMOF equalled the BMOF Principal, plus
any accrued interest. Thereafter, the Company was to receive proceeds until
the total it received equalled the amount received by BMOF, and any additional
NFG Litigation proceeds would have been shared equally by TGX and BMOF. If NFG
Litigation proceeds were insufficient to repay the BMOF loan, plus applicable
interest, the Company had no further obligation for such repayment. The BMOF
note was to mature on December 31, 1997, subject to each party having the
right to extend the maturity date and bore interest at the rate of 10% per
annum. However, until December 31, 1997, and for such further time as BMOF
elected to extend the maturity date of such loan, no cash payment for such
interest was required; instead, the Company was to pay interest in kind
through the issuance of additional notes to BMOF.
 
  On April 12, 1996, TGX entered into a Settlement Agreement with NFG and the
Public Service Commission of the State of New York. Pursuant to the Settlement
Agreement, TGX received on April 19, 1996, $7,200,000 from NFG and all parties
to the Settlement Agreement dismissed all claims and counterclaims against
each other. As a result of the NFG gross settlement proceeds and payment of
$100,000 to another party entitled to participate in the proceeds, TGX
recorded a net litigation settlement gain of $7,100,000. Pursuant to amended
credit agreements with BMOF, 50% of the gross settlement proceeds were paid to
BMOF in cancellation and full payment of the non-recourse secured note
totaling $5,468,000, including accrued interest of $816,000. TGX recorded an
extraordinary gain for debt forgiveness of $1,831,000, net of income taxes of
$37,000, in conjunction with the $3,600,000 BMOF final payment.
 
  During the Reorganization Proceeding, the Company incurred and claimants
filed applications for approximately $7,131,000 in administrative fees and
expenses relating to the reorganization ("Administrative Claims"). The Company
objected to certain of the Administrative Claims and negotiated settlement
amounts and terms of payment with certain holders of Administrative Claims. As
a result, administrative claimants, other than the Opposing Administrative
Claimants, upon execution of certain releases in favor of the Company and
others, were entitled to receive promissory notes (the "Administrative Notes")
due December 31, 1994, in satisfaction of each of their unpaid administrative
claim. Substantially all administrative claimants entitled to receive
Administrative Notes, perfected their claims by executing such releases. The
Administrative Notes bore interest at a rate not to exceed 8% and were secured
with certain collateral (the "Consummation Collateral"). If the proceeds
related to the Consummation Collateral were not sufficient to satisfy the
Company's obligations under the Administrative Notes the Company's excess
operating funds, if any, were to be applied toward the balances due. During
late 1994 and early 1995, the Company negotiated settlement with substantially
all of the Administrative Note holders. As a result of negotiated settlements
and forfeitures, Administrative Notes and Administrative Claims totaling
approximately $1,126,000 in principal and $253,000 in accrued interest were
renegotiated or forfeited with the Company making cash payments in the
aggregate of $455,000, issuing 151,518 shares of Senior Preferred Stock and
further issuing its non-recourse note in the aggregate amount of $90,000
payable out of proceeds received by the Company from the NFG Litigation, if
any, and all such notes and claims were deemed settled as of year end 1995.
The Company reflected an extraordinary net gain in 1995 of $93,000 in
conjunction with these settlements.
 
  Cash paid for interest during 1996 and 1995 totaled approximately $45,000
and $64,000, respectively.
 
                                     F-11
<PAGE>
 
                       TGX CORPORATION AND SUBSIDIARIES
 
            NOTES TO CONSOLIDATED FINANCIAL STATEMENTS--(CONTINUED)
 
4. COMMITMENTS AND CONTINGENCIES
 
 NFG Litigation
 
  In 1974, predecessors of TGX as seller and NFG as buyer entered into a gas
purchase and sale contract (the "NFG Contract") which, in 1983, the New York
State Public Service Commission (the "PSC") determined, in its Opinion No. 83-
26 ("Opinion 83-26"), that the pricing provision was unacceptable. A dispute
arose between NFG and TGX as to whether the NFG Contract remained in force
after Opinion 83-26, and, if it did, what price the NFG Contract prescribed
starting in December, 1983.
 
  During its Reorganization Proceeding, TGX filed an adversary proceeding (the
"Turnover Proceeding") in Bankruptcy Court to compel NFG to pay the amount due
to TGX pursuant to the provisions of the NFG Contract. Effective June 19,
1992, TGX and NFG entered into a partial settlement agreement, and, in
consideration of a payment of $2,940,000 (the "Payment) from NFG, TGX
dismissed the Turnover Proceeding without prejudice and released NFG (subject
to certain limitations) from any and all liability and affirmative claims for
relief alleged to arise from or based upon certain evidence presented by TGX
in the Turnover Proceeding.
 
  On April 12, 1996, TGX entered into a Settlement Agreement with NFG and the
Public Service Commission of the State of New York. Pursuant to the Settlement
Agreement, TGX received on April 19, 1996 $7,200,000 from NFG and all parties
to the Settlement Agreement have dismissed all claims and counterclaims
against each other.
 
 Other
 
  In August 1992, certain unleased mineral interest owners commenced a legal
action against TGX, as operator of certain wells, in the 19th Judicial
District Court for East Baton Rouge Parish, Louisiana (Case Number 383844,
Division "A"). The complaint alleges that revenues in excess of the reasonable
costs of drilling, completing, and operating certain wells have not been
credited to the interests of the unleased mineral interest owners. In July
1995, certain royalty owners in the same wells commenced a separate legal
action alleging that TGX and other working interest owners improperly profited
under the terms of a Gas Gathering and Transportation Agreement dated December
12, 1983. Both cases are in the discovery stage and if settlement negotiations
are not successful, TGX will vigorously defend itself in the litigation. TGX
does not believe that the ultimate resolution of these matters will have a
material adverse effect on the financial condition or results of operations of
TGX.
 
  In March 1994, a hearing was conducted in the Bankruptcy Court regarding the
final allowance of pre-petition and administrative claims related to an
overriding royalty interest previously conveyed by TGX. During that hearing,
the parties stipulated that the finally allowed amount of the claimant's
prepetition claim would be $600,000. That prepetition claim has been fully
satisfied by the issuance of 60,000 shares of Senior Preferred. The Company
had previously estimated that prepetition claim in that amount, and therefore
it had been reflected in prior years' financial statements. Subsequent to the
March 1994 hearing, and after post-hearing motions from both TGX and the
claimant, the Bankruptcy Court entered an order on September 7, 1994 which
determined that the claimant would be granted an allowed administrative
expense claim for unpaid overriding royalties arising post-petition but prior
to October 4, 1992 in the amount of $244,000. That administrative claim, when
finally allowed, was to be treated by the issuance of an Administrative Note
under the terms of the Plan, and was to be payable under the terms of the
Plan. The Bankruptcy Court further ruled that it would not exercise any
jurisdiction over claims for alleged unpaid overriding royalties arising
subsequent to October 4, 1992. On May 9, 1996, TGX settled this litigation for
payment of $400,000 and return of the 60,000 shares of Senior Preferred
previously issued.
 
                                     F-12
<PAGE>
 
                       TGX CORPORATION AND SUBSIDIARIES
 
            NOTES TO CONSOLIDATED FINANCIAL STATEMENTS--(CONTINUED)
 
  On May 31, 1995, the Company entered into a Settlement Agreement among
itself, Paragon Resources, Inc., J. C. Templeton, W. M. Templeton and a number
of other former directors of the Company, trusts on behalf of members of the
Templeton family and other entities pursuant to which all lawsuits between and
among the parties were dismissed with prejudice. In consideration therefor,
the Company received $325,000, an assignment of certain oil and gas leases,
and receipt of past due joint operating expenses payable by certain of the
defendants. The Company released lis pendens against certain of the
defendants' properties and conveyed to the defendants an interest in certain
properties to which they were entitled. The parties to the litigation also
conveyed to the Company any Common Stock or Preferred Stock which they held.
 
  From time to time, in the normal course of business, the Company is a party
to various other litigation matters the outcome of which, to the extent not
otherwise provided for, should not have a material adverse effect on the
Company.
 
 Leases
 
  As of December 31, 1996, the Company's only lease commitment was for its
office lease which is cancellable, at the Company's election, with 90 days
notice and expires on May 31, 1999. Future annual rental amounts are $70,000
(1997), $70,000 (1998) and $29,000 (1999).
 
 Other
 
  As of December 31, 1996, the Company had letters of credit outstanding of
$92,000 under the Bank One credit facility which reduced the Company's
availability under the facility. See Note 3 above.
 
5. INVESTMENT IN NATURAL GAS TREATING PLANT
 
  In conjunction with the acquisition of Amarex, Inc. in 1985, the Company
acquired Amarex's 35% interest in the Comite Field Plant Venture (the
"Venture"), an Oklahoma general partnership formed in April 1982 for the
purpose of constructing and operating a natural gas treating plant to serve
the Comite Field in East Baton Rouge Parish, Louisiana. Natural gas produced
from one well operated by the Company and two wells of other operators are
transported to the plant where contaminants are extracted to satisfy pipeline
specifications. In addition, the plant also provides condensate handling and
saltwater disposal facilities. The Company receives cash distributions from
the Venture for its share of net cash flow. In addition, the Venture charges
the Company for gas treating and such charges are included in operating
expenses.
 
                                     F-13
<PAGE>
 
                        TGX CORPORATION AND SUBSIDIARIES
 
            NOTES TO CONSOLIDATED FINANCIAL STATEMENTS--(CONTINUED)
 
 
  A summary of the Venture's unaudited financial position as of December 31,
1996 and 1995, and the results of its operations for the years then ended is:
 
<TABLE>
<CAPTION>
                                                                   1996   1995
                                                                  ------ ------
                                                                       (IN
                                                                   THOUSANDS)
                                                                   (UNAUDITED)
<S>                                                               <C>    <C>
SUMMARY BALANCE SHEETS
Current assets................................................... $  594 $  667
Net property and equipment.......................................  1,278  1,701
                                                                  ------ ------
                                                                  $1,872 $2,368
                                                                  ====== ======
Current liabilities.............................................. $  144 $  155
Long-term debt...................................................     50    100
Partners' capital................................................  1,678  2,113
                                                                  ------ ------
                                                                  $1,872 $2,368
                                                                  ====== ======
SUMMARY STATEMENTS OF EARNINGS
Fees earned...................................................... $2,608 $2,448
Operating expenses...............................................  1,062  1,131
                                                                  ------ ------
Operating income.................................................  1,546  1,317
Other income.....................................................      4      8
                                                                  ------ ------
Net income....................................................... $1,550 $1,325
                                                                  ====== ======
</TABLE>
 
6. ACCOUNTS PAYABLE AND ACCRUED LIABILITIES
 
  As of December 31, 1996 and 1995, the primary components of accounts payable
and accrued liabilities were (in thousands):
 
<TABLE>
<CAPTION>
                                                                   1996   1995
                                                                  ------ ------
<S>                                                               <C>    <C>
Accounts payable................................................. $  360 $  555
Undistributed net oil and natural gas revenue....................  1,281  1,152
Accrued pre-petition liabilities.................................     --    518
Accrued operating and tax expenses...............................    354    312
Accrued professional fees........................................    347    125
Income tax liability.............................................    180     --
Operation advances...............................................    115    159
Miscellaneous accruals...........................................    360    532
                                                                  ------ ------
                                                                  $2,997 $3,353
                                                                  ====== ======
</TABLE>
 
                                      F-14
<PAGE>
 
                       TGX CORPORATION AND SUBSIDIARIES
 
            NOTES TO CONSOLIDATED FINANCIAL STATEMENTS--(CONTINUED)
 
7. REDEEMABLE SENIOR PREFERRED STOCK
 
  The Company is authorized to issue 10,000,000 shares of Series A Redeemable
Senior Preferred Stock ("Senior Preferred") with a par value of $1 per share.
The Senior Preferred entitles its holders to receive a 10% annual compounded
cash dividend, payable quarterly, provided however, that the payment of such
dividend does not violate Delaware law or certain covenants in the Company's
bank loan agreements. The Company has not paid any of the quarterly dividends
required to date and based on the Company's current financial position does
not expect to make any such dividend payments in the near future. The Senior
Preferred have a liquidation preference of $10 per share and have priority
over the liquidation preference afforded the holders of Series B Preferred
Stock (the "Junior Preferred"), 9% Cumulative Convertible Preferred Stock (the
"Old Preferred") and Common Stock. The Senior Preferred are scheduled to be
redeemed on January 21, 2002 ("Redemption Date"). On a monthly basis, the
accretion of the difference between the recorded value and the redemption
amount of the Senior Preferred is reflected as a reduction of income
applicable to common stockholders. Since the Senior Preferred have both debt
and equity characteristics it is not classified as a component of equity.
Holders of Senior Preferred have 95% of the voting rights of the Company with
the remaining 5% of voting rights being allocated collectively among the
holders of the Junior Preferred, Old Preferred and Common Stock.
 
  Pursuant to the Plan, the Company provided for a total of 8,529,246 shares
to be issued to holders of certain unsecured claims on the basis of one share
of Senior Preferred for every $10 of certain finally allowed or otherwise
agreed upon claim. During 1992, an additional 200,000 shares were issued to an
executive officer pursuant to a management agreement. In conjunction with
fresh start reporting, in 1992, the Senior Preferred was recorded at a value
of $11,046,000 which is $76,246,000 less than redemption value. In 1995, an
additional 250,000 shares were issued to certain executive officers and
128,110 canceled in conjunction with settlement of certain pre-petition
obligations, post-petition asset sale and litigation settlement. In 1996,
60,000 shares were canceled in conjunction with litigation settlement and
2,565 shares canceled as a result of purchase by the Company. The Company
recorded in 1996 and 1995 $24,000 and $52,000, respectively, of stock
compensation expense related to the management agreement and executive officer
stock issuances. Stock compensation expense is amortized over the stock award
forfeiture period of two years from grant date. For stock compensation expense
recognition purposes the 1992 award was valued at $1.50 per share, based on an
internal estimate of Company net assets as of October 2, 1992 (fresh start
reporting). The 1995 awards were valued based on a reported 1995 Senior
Preferred trade at $0.20 per share. The compensation accruals recognized by
the Company are not significantly different from amounts that would have been
recognized under the SFAS 123 fair value method at the grant date.
 
                                     F-15
<PAGE>
 
                       TGX CORPORATION AND SUBSIDIARIES
 
            NOTES TO CONSOLIDATED FINANCIAL STATEMENTS--(CONTINUED)
 
  Since December 31, 1994, the components of the number of shares of the
Company's Senior Preferred and changes in associated values are as follows (in
thousands):
 
<TABLE>
<CAPTION>
                                                              NUMBER   RECORDED
                                                             OF SHARES  VALUE
                                                             --------- --------
<S>                                                          <C>       <C>
Balance, December 31, 1994..................................   8,729   $44,602
Accrued and unpaid dividends................................      --    12,038
Accretion on redemption value and dividends.................      --     5,045
Amortization of compensation shares pursuant to management
 agreement..................................................      --        35
Shares issued pursuant to management option agreements......     250        17
Shares canceled.............................................    (128)       --
                                                               -----   -------
Balance, December 31, 1995..................................   8,851    61,737
Accrued and unpaid dividends................................      --    12,873
Accretion on redemption value and dividends.................      --     6,104
Amortization of compensation shares pursuant to management
 agreement..................................................      --        24
Shares canceled.............................................     (63)      (12)
                                                               -----   -------
Balance, December 31, 1996..................................   8,788   $80,726
                                                               =====   =======
</TABLE>
 
  See Note 14 below.
 
8. STOCKHOLDERS' EQUITY (DEFICIT)
 
  Since December 31, 1994, the components of the number of shares of the
Company's stockholders' equity (deficit) and the changes therein are:
 
<TABLE>
<CAPTION>
                                                         OLD
                                                      PREFERRED COMMON  TREASURY
                                                        STOCK   STOCK    STOCK
                                                      --------- ------  --------
                                                        (THOUSANDS OF SHARES)
<S>                                                   <C>       <C>     <C>
Balance, December 31, 1994...........................    431    25,314   3,663
Dividends on Old Preferred Stock.....................     27        --      --
Shares surrendered...................................     --      (358)    358
                                                         ---    ------   -----
Balance, December 31, 1995...........................    458    24,956   4,021
Dividends on Old Preferred Stock.....................     27        --      --
                                                         ---    ------   -----
Balance, December 31, 1996...........................    485    24,956   4,021
                                                         ===    ======   =====
</TABLE>
 
 As a result of the Senior Preferred Stock liquidation and dividend
preference, no value was ascribed to common stock held in treasury.
 
                                     F-16
<PAGE>
 
                       TGX CORPORATION AND SUBSIDIARIES
 
            NOTES TO CONSOLIDATED FINANCIAL STATEMENTS--(CONTINUED)
 
  Since December 31, 1994, the components of the Company's stockholders'
equity (deficit), and the changes therein are:
 
<TABLE>
<CAPTION>
                                           OLD           ADDITIONAL
                                        PREFERRED COMMON  PAID-IN   ACCUMULATED
                                          STOCK   STOCK   CAPITAL     DEFICIT
                                        --------- ------ ---------- -----------
                                                    (IN THOUSANDS)
<S>                                     <C>       <C>    <C>        <C>
Balance, December 31, 1994.............   $431     $290    $1,179    $(45,611)
Preferred dividends, payable with
 additional shares of Old Preferred....     27       --       243        (270)
Dividends on Senior Preferred..........     --       --        --     (12,038)
Accretion of Senior Preferred
 redemption value......................     --       --        --      (5,045)
Net loss...............................     --       --        --        (340)
                                          ----     ----    ------    --------
Balance, December 31, 1995.............    458      290     1,422     (63,304)
                                          ----     ----    ------    --------
Preferred dividends payable with
 additional shares of Old Preferred....     27       --       243        (270)
Dividends on Senior Preferred..........     --       --        --     (12,873)
Accretion of Senior Preferred
 redemption value......................     --       --        --      (6,104)
Net income.............................     --       --        --      10,435
                                          ----     ----    ------    --------
Balance, December 31, 1996.............   $485     $290    $1,665    $(72,116)
                                          ====     ====    ======    ========
</TABLE>
 
 Cumulative Convertible Preferred Stock
 
  The Company is authorized to issue 10,000,000 shares of 9% Cumulative
Convertible Preferred Stock (the "Old Preferred") of which 300,000 shares are
outstanding. The Old preferred have a $1 par value and a liquidation
preference of $10 per share, convertible at any time at the rate of one Old
Preferred share for four shares of the Company's Common Stock. In addition,
185,000 shares of Old Preferred will be issued for accrued dividends. Until
the redemption value plus all accrued dividends attributable to Senior
Preferred are paid in full, dividends related to the Old Preferred will be
paid with additional shares of Old Preferred.
 
 Common Stock
 
  The Company is authorized to issue 100,000,000 shares of Common Stock, with
a $.01 par value, of which 24,955,807 were outstanding at December 31, 1996.
All outstanding shares of Common Stock are fully paid and non-assessable.
 
  The holders of Common Stock are entitled to one vote per share upon all
matters presented to them. Pursuant to the Plan, holders of Common Stock are
entitled, collectively with holders of Junior Preferred and Old Preferred, to
5% of the total voting power of the Company. The holders of Common Stock are
entitled to dividends in such amounts as may be declared from time to time out
of any funds legally available for such purposes. However, no dividends are
payable until all accrued dividends have been paid to the preferred
stockholders. In the event of liquidation, dissolution or winding up of the
affairs of the Company, whether voluntary or involuntary, after payment of
debts and liquidation preferences on preferred stock, all remaining assets, if
any, will be divided and distributed among the holders of Common Stock pro
rata according to the number of shares owned by them. The Common Stock does
not have preemptive rights and is not subject to redemption.
 
                                     F-17
<PAGE>
 
                       TGX CORPORATION AND SUBSIDIARIES
 
            NOTES TO CONSOLIDATED FINANCIAL STATEMENTS--(CONTINUED)
 
9. INCOME TAXES
 
  The Company follows Statement of Financial Accounting Standards No. 109,
"Accounting for Income Taxes" ("Statement 109"), which requires recognition of
deferred tax assets and liabilities for the expected future tax consequences
of events that have been included in the financial statements or tax returns.
Under this method, deferred tax liabilities and assets are determined based on
the difference, if any, between the financial reporting and tax bases of
assets and liabilities using enacted tax rates in effect for the year in which
the differences are expected to reverse.
 
  In conjunction with the recognition of tax gains on property sales,
litigation settlements and debt forgiveness, the Company estimated and accrued
income taxes in 1996 of $180,000 of which $37,000 was netted against the
extraordinary gain.
 
  In 1996, as a result of improvement in current income and projections of
continued improvement in such, the Company recognized a deferred tax asset of
$930,000, including $187,000 of alternative minimum tax, based on an estimated
realization of 1997 and 1998 projected income before taxes of approximately
$2,700,000 at the Company's statutory tax rate of 34%. The valuation of this
asset was based on the Company's more likely than not assessment of the effect
of future oil and gas prices, including seasonal price trend fluctuations,
limited Company history of positive financial results and other factors unique
to the Company.
 
  The components of income tax expense (benefit) are as follows:
 
<TABLE>
<CAPTION>
                                                               1996     1995
                                                              -------  -------
                                                              (IN THOUSANDS)
      <S>                                                     <C>      <C>
      Income taxes currently payable......................... $   180  $    --
      Income tax expense attributed to extraordinary gain....     (37)      --
                                                              -------  -------
                                                                  143       --
                                                              -------  -------
      Deferred income tax (benefit):
        Current..............................................    (680)      --
        Non-current..........................................    (250)      --
                                                              -------  -------
                                                                 (930)      --
                                                              -------  -------
                                                              $  (787) $    --
                                                              =======  =======
 
  Deferred tax assets (liabilities) are comprised of the following:
 
<CAPTION>
                                                               1996     1995
                                                              -------  -------
                                                              (IN THOUSANDS)
      <S>                                                     <C>      <C>
      Deferred Tax Assets:
        Loss carryforwards................................... $ 7,531  $11,062
        Alternative minimum tax credit carryforward and
         other...............................................     187        6
      Deferred Tax Liabilities:
        Oil and gas properties...............................  (1,405)  (2,571)
                                                              -------  -------
      Net deferred tax asset.................................   6,313    8,497
      Valuation allowance....................................  (5,383)  (8,497)
                                                              -------  -------
                                                              $   930  $    --
                                                              =======  =======
</TABLE>
 
                                     F-18
<PAGE>
 
                       TGX CORPORATION AND SUBSIDIARIES
 
            NOTES TO CONSOLIDATED FINANCIAL STATEMENTS--(CONTINUED)
 
  Income tax expense differs from the amounts computed by applying the
statutory federal rate as follows:
 
<TABLE>
<CAPTION>
                                                                     YEAR
                                                                     ENDED
                                                                   DECEMBER
                                                                      31,
                                                                   -----------
                                                                   1996   1995
                                                                   ----   ----
      <S>                                                          <C>    <C>
      Income taxes computed at statutory federal rate.............  34 %   34 %
      Net operating loss carryover utilized in current period..... (34)   (34)
      Alternative minimum tax and other...........................   2     --
      Reduction in valuation allowance of deferred tax assets..... (12)    --
                                                                   ---    ---
                                                                   (10)%   -- %
                                                                   ===    ===
</TABLE>
 
  Pursuant to the provisions of the Internal Revenue Code (the "Code"), a
corporation which undergoes a "change of ownership" is generally subject to an
annual limitation on the utilization of its loss carryovers. As a result of
the Reorganization Proceeding, on the Effective Date a "change of ownership"
for the Company occurred under the Code. Since the Reorganization Proceeding
was conducted pursuant to the Bankruptcy Code, the Company was eligible for an
exception (the "Bankruptcy Exception") to this general rule. In order to
maintain the Bankruptcy Exception, the Company could not have another "change
of ownership" within two years of the first change. If such a change did
occur, the Company's entire pre-"change of ownership" loss carryovers would be
eliminated. Due to the probability that a second "change of ownership" for tax
reporting purposes could occur, the Company elected out of the Bankruptcy
Exception regarding the utilization of its pre-"change of ownership" loss
carryovers.
 
  Since the Company has elected not to apply the Bankruptcy Exception, the
Company is limited in its utilization of the pre-"change of ownership" loss
carryovers. Based on the value of the Company as of the Effective Date, the
annual amount of the pre-"change of ownership" loss carryovers to be utilized
is limited to $1,230,000 but loss carryovers not fully utilized in the year
that they are available may be carried over and utilized in subsequent years,
subject to their expiration provisions. As of December 31, 1996, the Company
had pre-"change of ownership" net operating loss carryforwards of $2,526,000
which are available for use through 2006. The Company also had post-"change of
ownership" net operating loss carryforwards of $7,701,000 that expire in 2008
and are available without limitation.
 
  The Company has certain investment tax credits which are also subject to the
"change of ownership" limitation. Due to the limitation and scheduled
expiration, it is unlikely that the Company will realize any future benefit
from such credits. The Company had depletion carryforwards, as of December 31,
1996, of $14,600,000 which are limited annually to 65% of taxable income.
 
10. RELATED PARTY TRANSACTIONS
 
  Pursuant to the provisions of the applicable agreements and in its capacity
as general partner, the Company received recurring supervisory and
administrative fees, including reimbursement of certain general and
administrative costs, from certain partnerships. Supervisory and
administrative fees of $424,000 were received during 1995. All partnerships
for which the Company acted as general partner were liquidated in late 1995
thus negating any future administrative fees and reimbursement.
 
  Paragon Resources, Inc. ("Paragon") and certain of its affiliates were
owners of approximately 14% of the Company's outstanding Common Stock in 1994.
In the past, the Company had substantial transactions with Paragon including
the offering of interests and in the drilling of wells for partnerships. In
February 1992, the Company commenced a legal action regarding the collection
of amounts due to it from Paragon and certain of its affiliates. Due to the
uncertainty regarding the status of this litigation, the Company established
an allowance
 
                                     F-19
<PAGE>
 
                       TGX CORPORATION AND SUBSIDIARIES
 
            NOTES TO CONSOLIDATED FINANCIAL STATEMENTS--(CONTINUED)

for all amounts due from Paragon and affiliates in excess of $286,000. In
1995, the litigation against Paragon and certain of its affiliates was
settled. As a result of the litigation settlement, the Company recognized an
allowance recoupment of $425,000 and offset the remaining allowance against
the outstanding receivables.
 
11. MAJOR CUSTOMERS
 
  The Company's revenues are derived principally from uncollateralized sales
to customers in the oil and natural gas industry. The concentration of credit
risk in a single industry affects the Company's overall exposure to credit
risks since customers may be similarly affected by changes in economic and
other conditions.
 
  Customers which accounted for greater than 10% of oil and gas sales are as
follows:
 
<TABLE>
<CAPTION>
                                                                       1996  1995
                                                                       ----  ----
      <S>                                                              <C>   <C>
      Lion Oil Company ...............................................  24%   22%
      Chesapeake Energy Marketing, Inc. ..............................  14%   28%
      Energy Source, Inc. ............................................  11%   12%
      Enron Gas Marketing ............................................  --%   14%
</TABLE>
 
12. INFORMATION ON OIL AND GAS ACTIVITIES
 
  Following are supplemental disclosures relating to the Company's oil and
natural gas exploration and production activities.
 
 Oil and Gas Related Costs and Operating Results
 
  The following schedules present capitalized costs and costs incurred,
whether capitalized or expensed, and operating results for the periods then
ended.
 
<TABLE>
<CAPTION>
                                                                 1996     1995
                                                                -------  ------
                                                                (IN THOUSANDS)
      <S>                                                       <C>      <C>
      Capitalized costs:
        Unproved properties.................................... $   191  $   18
        Proved properties......................................  15,344  11,322
        Accumulated depletion and depreciation.................  (4,996) (4,062)
                                                                -------  ------
                                                                $10,539  $7,278
                                                                =======  ======
      Costs incurred:
       Acquisition of properties:
        Unproved............................................... $   163  $   18
        Proved.................................................   2,932     718
        Development............................................   1,124     338
                                                                -------  ------
                                                                $ 4,219  $1,074
                                                                =======  ======
      Operating results(1):
        Revenues............................................... $ 5,059  $3,611
                                                                -------  ------
      Costs and expenses:
        Production and exploration costs.......................   2,375   1,974
        Depletion and depreciation.............................     933     951
                                                                -------  ------
                                                                  3,308   2,925
                                                                -------  ------
      Operating earnings before income taxes...................   1,751     686
      Income tax benefit.......................................    (787)     --
                                                                -------  ------
      Operating earnings....................................... $ 2,538  $  686
                                                                =======  ======
</TABLE>
--------
(1) Excludes general and administrative and interest expense.
 
                                     F-20
<PAGE>
 
                       TGX CORPORATION AND SUBSIDIARIES
 
            NOTES TO CONSOLIDATED FINANCIAL STATEMENTS--(CONTINUED)
 
 Acquisitions
 
  In 1996, the Company purchased, for cash, producing properties, through
numerous transactions, for $2,932,000 with effective dates at various times
during the year. Of such purchases, $1,737,000, comprising eight separate
transactions, were acquired in December with effective dates at the end of
December 1996, resulting in no impact on 1996 revenues and expenses. In 1995,
the Company purchased certain producing properties for $771,000 with primarily
an effective date of December 1, 1995. These acquisitions have been accounted
for on a purchase basis and all post effective date revenues and expenses for
such acquisitions were included in the respective year results.
 
 Pro Forma Acquisition Information (Unaudited)
 
  Had all 1996 properties purchased been acquired at the beginning of the
years presented, the impact on revenues and income before extraordinary gain
would have been an increase of $1,030,000 and $520,000, respectively for 1996
and $885,000 and $291,000, respectively, for 1995. The 1995 property purchase
impact on operating results was not material.
 
  The following table summarizes certain pro forma condensed consolidated
results of operations data that give effect to the 1996 acquisitions as if
they had occurred on January 1, 1996 and 1995 (in thousands, except per share
data).
 
<TABLE>
<CAPTION>
                                                                YEAR ENDED
                                                               DECEMBER 31,
                                                             -----------------
                                                              1996      1995
                                                             -------  --------
<S>                                                          <C>      <C>
Total revenues.............................................. $14,830    $5,482
Income (loss) before extraordinary gain.....................   9,124      (142)
Net loss applicable to common stock.........................  (8,292)  (17,402)
Net loss per share of common stock.......................... $ (0.33) $  (0.69)
</TABLE>
 
 Proved Reserves (Unaudited)
 
  The following schedule presents estimates of proved oil and natural gas
reserves attributable to the Company, all of which are located in the United
States. Proved reserves are estimated quantities of oil and natural gas which
geological and engineering data demonstrate with reasonable certainty to be
recoverable in future years from known reservoirs under existing economic and
operating conditions. Proved developed reserves are those which are expected
to be recovered through existing wells with existing equipment and operating
methods. Reserves are stated in thousands of barrels of oil and billions of
cubic ("Bcf") feet of natural gas.
 
<TABLE>
<CAPTION>
                                                             1996       1995
                                                           ---------  ---------
                                                           OIL  GAS   OIL  GAS
                                                           ---  ----  ---  ----
      <S>                                                  <C>  <C>   <C>  <C>
      Proved reserves:
        Beginning of year................................. 944  12.2  931  10.4
        Sales of reserves in place........................  (8)  (.1)  (2)   --
        Purchases of reserves-in-place....................  45   4.1   22   1.2
        Extensions and discoveries........................  57    .6    1   0.1
        Revisions of previous estimates...................  19    .5   55   2.2
        Production(1)..................................... (76) (1.5) (63) (1.7)
                                                           ---  ----  ---  ----
        End of year....................................... 981  15.8  944  12.2
                                                           ===  ====  ===  ====
      Proved-developed reserves........................... 525  13.4  465   9.7
                                                           ===  ====  ===  ====
</TABLE>
(1) 1995 includes .220 Bcf of gas volumes related to gas balancing.
 
                                     F-21
<PAGE>
 
                       TGX CORPORATION AND SUBSIDIARIES
 
            NOTES TO CONSOLIDATED FINANCIAL STATEMENTS--(CONTINUED)
 
  Estimating economically recoverable crude oil and natural gas reserves and
the future net revenues therefrom is not an exact science and is based upon a
number of variable factors, such as historical production of the subject
properties as compared with similar producing properties, and assumptions such
as the effects of
regulation by governmental agencies, future taxes, and development and other
costs, all of which may vary considerably from actual results. All such
estimates are to some degree speculative, and classifications of reserves are
only attempts to define the degree of speculation involved. For these reasons,
estimates of economically recoverable reserves of crude oil and natural gas
attributable to any particular group of properties, the classification and
risk of recovering such reserves, and estimates of the future net revenues
expected therefrom, prepared by different engineers or by the same engineers
at different times, may vary substantially.
 
  Proved oil and natural gas reserves are the estimated quantities of crude
oil, natural gas and natural gas liquids which geological and engineering data
demonstrate with reasonable certainty to be recoverable in future years from
known reservoirs under existing economic and operating conditions. Estimates
with respect to proved undeveloped and proved developed non-producing reserves
that may be developed and produced in the future are based upon volumetric
calculations or upon analogy to similar types of reservoirs. Later studies of
the same reservoirs based upon production history may result in variations,
which may be substantial. The actual production, revenues, severance and
excise taxes, development costs, and operating expenditures with respect to
the Company's reserves as reflected herein may vary from estimates, and such
variances may be material.
 
 Standardized Measure of Discounted Future Net Cash Flows (Unaudited)
 
  The following schedules present the standardized measure of estimated
discounted future net cash flows attributable to the Company's proved oil and
gas reserves ("Standardized Measure"), and an analysis of the changes in these
amounts and quantities for the periods indicated. The Standardized Measure was
computed on the basis of (a) contractual prices, including escalations for
natural gas, in effect at year end for oil and natural gas (b) the market
price for natural gas and the posted price for oil in effect at year end for
the area in the case of properties being commercially developed but not
covered by existing contracts, (c) estimated deliverability, which not only
considers the physical characteristics of the well or property, but also the
amount and timing of future production estimated to be taken by its
purchasers, and (d) where applicable, the premise that future prices and
deliveries will be in accordance with existing contractual terms which may
require arbitration or litigation to ultimately assure compliance. Estimated
future production and development costs are based on economic conditions at
the respective year ends. Estimated future development costs associated with
proved developed non-producing and proved undeveloped reserves for both 1996
and 1995 totaled $3.8 million. Production of those reserves is dependent upon
the Company's ability to fund such future development costs, which are
scheduled to be incurred over numerous years. Future income taxes, if any, are
computed by applying statutory income tax rates to the difference between the
future pre-tax cash flows and the tax basis of proved oil and gas properties,
after considering investment tax credits and depletion carryforwards and net
operating loss carryovers associated with these properties.
 
  Since the Standardized Measure was prepared using the prevailing economic
conditions existing at each applicable year end, it is emphasized that such
conditions continually change, as evidenced by the fluctuations in oil and
natural gas prices during recent years. Weighted average year end oil and
natural gas prices utilizated in computing the Standardized Measure for 1996
were $24.43 and $3.33, respectively, and for 1995 were $18.66 and $1.76,
respectively. Accordingly, such information should not serve as a basis in
making any judgment on the potential value of the Company's recoverable
reserves, or in estimating future results of operations.
 
                                     F-22
<PAGE>
 
                       TGX CORPORATION AND SUBSIDIARIES
 
            NOTES TO CONSOLIDATED FINANCIAL STATEMENTS--(CONTINUED)
 
<TABLE>
<CAPTION>
                                                               1996     1995
                                                             --------  -------
                                                              (IN THOUSANDS)
<S>                                                          <C>       <C>
Future net cash flows:
 Future revenues............................................ $ 76,568  $39,205
                                                             --------  -------
 Future production costs....................................   21,793   14,476
 Future development costs...................................    3,830    3,844
                                                             --------  -------
                                                               25,623   18,320
                                                             --------  -------
 Future pre-tax cash flows..................................   50,945   20,885
 Future income taxes........................................   (4,444)      --
                                                             --------  -------
 Future net cash flows......................................   46,501   20,885
 10% discount factor........................................  (19,257)  (9,081)
                                                             --------  -------
Standardized Measure, discounted at 10%, of future net cash
 flows......................................................  $27,244  $11,804
                                                             ========  =======
Changes in Standardized Measure:
 Standardized Measure, beginning of year.................... $ 11,804  $ 8,807
                                                             --------  -------
 Purchases of reserves-in-place.............................    5,818    1,174
 Extensions and discoveries.................................    2,377      188
 Revisions of previous quantity estimates...................      878    1,835
 Changes in future development costs........................     (539)    (247)
 Development costs incurred during the period that reduced
  future development costs..................................      538      254
 Net changes in prices and production costs.................   10,511      959
 Sales of oil and natural gas produced, net of production
  costs.....................................................   (2,848)  (1,706)
 Net change in income taxes.................................   (2,012)      --
 Accretion of discount......................................    1,180      881
 Sale of reserves-in-place..................................     (134)     (16)
 Changes in production rates and other, net.................     (329)    (325)
                                                             --------  -------
 Net increase (decrease)....................................   15,440    2,997
                                                             --------  -------
Standardized Measure, end of year........................... $ 27,244  $11,804
                                                             ========  =======
</TABLE>
 
  Since year-end 1996 oil and natural gas prices have declined resulting in
prices of $20.47 and $2.67, respectively, as of February 28, 1997.
 
13. INTERIM FINANCIAL DATA (UNAUDITED)
 
  The unaudited interim results of operations, are summarized below (in
thousands of dollars except per share amounts):
 
<TABLE>
<CAPTION>
                                  MARCH 31, JUNE 30,  SEPTEMBER 30, DECEMBER 31,
                                  --------- --------  ------------- ------------
<S>                               <C>       <C>       <C>           <C>
1996:
  Revenues.......................  $ 1,466  $ 1,480      $ 1,517      $ 2,237
  Gross profit...................      624      620          662          942
  Litigation settlement gain,
   net...........................       --    7,100           --           --
  Extraordinary gain, net of
   income taxes of $37...........       --    1,831           --           --
  Net income (loss) applicable to
   common stock..................   (4,827)   4,201       (4,690)      (3,496)
  Net income (loss) per common
   share.........................  $ (0.19) $  0.17      $ (0.19)     $ (0.14)
1995:
  Revenues.......................  $ 1,140  $   959      $ 1,244      $ 1,254
  Gross profit...................      529      144          327          706
  Extraordinary gain (loss)......      118      (25)          --           --
  Net loss applicable to common
   stock.........................   (4,415)  (4,741)      (4,603)      (3,934)
  Net loss per common share......  $ (0.17) $ (0.19)     $ (0.18)     $ (0.16)
</TABLE>
 
                                     F-23
<PAGE>
 
                       TGX CORPORATION AND SUBSIDIARIES
 
            NOTES TO CONSOLIDATED FINANCIAL STATEMENTS--(CONTINUED)
 
14. SUBSEQUENT EVENT
 
  On February 10, 1997, Mr. Carpenter, the Chief Executive Officer and
President of the Company, resigned. Pursuant to a Settlement Agreement,
Release and Confidentiality Agreement entered into between the Company and Mr.
Carpenter on March 31, 1997, Mr. Carpenter has agreed to forfeit 100,000
shares of the Company's stock which would have become non-forfeitable on April
1, 1997. In addition, he has resigned as an officer and director of the
Company, released the Company and others from all liabilities and has agreed
that he would not acquire or attempt to acquire or help others to acquire any
stock in the Company for a period of three years. Mr. Carpenter has also
agreed to consult with the Company for one year on a limited basis. In
consideration for these agreements, the Company has paid to Mr. Carpenter the
sum of $225,000 and released him from all liabilities arising from his
employment with the Company. The sum of $225,000 paid to Mr. Carpenter will be
expensed in March 1997, as such payment provides no future benefit to the
Company. As a result of this settlement agreement and 10,000 shares subject to
forefeiture as a result of another officer resignation in March 1997, the
total Senior Preferred shares outstanding, after these forfeitures, is
8,678,571.
 
                                     F-24
<PAGE>
 
                          UNAUDITED PRO FORMA SUMMARY
                   CONDENSED COMBINED FINANCIAL INFORMATION
   
  The following summary pro forma condensed combined financial information
gives effect to the merger of TGX Corporation with and into Sheridan Energy,
Inc., a wholly-owned subsidiary of TGX Corporation. This information has been
derived from the Consolidated Financial Statements of TGX and should be read
in conjunction with such statements and the related Notes included elsewhere
herein. The unaudited pro forma condensed combined statement of operations for
the year ended December 31, 1996 gives effect to the Merger as if it had been
consummated at the beginning of such period and to the impact of 1996
producing property acquisitions as if such had been acquired at the beginning
of the year. The unaudited pro forma condensed combined balance sheet as of
December 31, 1996 assumes that the Merger had been consummated on December 31,
1996. The Sheridan subsidiary did not conduct any business prior to the
effective time of this merger and therefore does not have historical financial
statement information. (In thousands, except for per share data.)     
 
<TABLE>
<CAPTION>
                                            DECEMBER 31, 1996
                                    ----------------------------------
                                               PRO FORMA   PRO FORMA
                                    HISTORICAL ADJUSTMENT   BALANCE
                                    ---------- ---------- ------------
<S>                                 <C>        <C>        <C>          <C>
BALANCE SHEET DATA
  Current assets...................  $  4,012         --    $ 4,012
  Property and equipment, net......    10,636         --     10,636
  Other assets.....................       899         --        899
                                     --------   --------    -------
    Total assets...................  $ 15,547         --    $15,547
                                     ========   ========    =======
  Current liabilities..............  $  2,997   $    130    $ 3,127
  Long-term debt...................     1,500         --      1,500
  Redeemable Senior Preferred
   Stock...........................    80,726    (80,726)        --
  Stockholders' equity (deficit):
   9% Cumulative Preferred Stock...       485       (485)        --
   Common Stock....................       290       (290)        --
   New Common Stock................        --         44         44
   Additional paid-in capital......     1,665     14,129     15,794
   Accumulated deficit.............   (72,116)    67,198     (4,918)
                                     --------   --------    -------
    Total stockholders' equity
     (deficit).....................   (69,676)    80,596     10,920
                                     --------   --------    -------
    Total liabilities and
     stockholders' equity
     (deficit).....................  $ 15,547   $     --    $15,547
                                     ========   ========    =======
<CAPTION>
                                           YEAR ENDED DECEMBER 31, 1996
                                    ------------------------------------------
                                                      PRO FORMA
                                                     ADJUSTMENTS         PRO
                                               -----------------------  FORMA
                                    HISTORICAL   MERGER   ACQUISITIONS BALANCE
                                    ---------- ---------- ------------ -------
<S>                                 <C>        <C>        <C>          <C>
STATEMENT OF OPERATIONS DATA
  Revenues.........................  $ 13,800   $     --    $ 1,030    $14,830
  Costs and expenses...............    (5,983)       594       (510)    (5,899)
  Income tax benefit...............       787         --         --        787
                                     --------   --------    -------    -------
  Income before extraordinary gain.     8,604        594        520      9,718
  Preferred Stock dividends and
   Senior Preferred accretion......   (19,247)    19,247         --         --
                                     --------   --------    -------    -------
  Net income (loss) applicable to
   common stock before
   extraordinary gain..............  $(10,643)  $ 19,841    $   520    $ 9,718
                                     ========   ========    =======    =======
  Net income (loss) per share of
   common stock before
   extraordinary gain..............  $  (0.42)  $     --    $    --    $  2.21
                                     ========   ========    =======    =======
  Average common shares
   outstanding.....................    24,956                            4,405
                                     ========                          =======
</TABLE>
 
  See accompanying notes to unaudited pro forma condensed combined financial
                                 information.
 
                                     F-25
<PAGE>
 
                    NOTES TO UNAUDITED PRO FORMA CONDENSED
                        COMBINED FINANCIAL INFORMATION
 
 General
   
  The following unaudited pro forma condensed combined financial information
is presented to reflect the estimated impact on the historical Consolidated
Financial Statements of TGX, assuming the issuance of 4,394,285 shares of
Sheridan Common Stock, in exchange for all of TGX's Senior Preferred Shares
and the cancellation of TGX's previously issued Preferred Stock and Common
Stock as of December 31, 1996 and the impact of 1996 producing property
acquisitions as if such had been acquired at the beginning of the year. As
discussed in Note 14 of the Notes to Consolidated Financial Statements,
subsequent to December 31, 1996, 110,000 Senior Preferred shares were
forfeited in conjunction with officer resignations. As a result of these
forfeitures the current Sheridan Common Shares to be issued would be
4,339,285.     
 
  The unaudited pro forma condensed combined financial information gives
effect only to the adjustments set forth in the accompanying notes to
unaudited pro forma condensed combined financial statements. Unaudited pro
forma information is not necessarily indicative of the results of operations
or financial position which would have occurred had the Merger been
consummated on the dates indicated, nor is it necessarily indicative of the
Company's future results of operations or financial position.
 
 Pro Forma Adjustments
   
  The balance sheet pro forma adjustments consist of the following merger
adjustments: (1) an increase in current liabilities for estimated additional
Merger expenses (see below) to be incurred ($130,000); (2) cancellation of all
previously issued Senior Preferred Stock ($80,726,000), Old Preferred Stock
($485,000) and TGX Common Stock ($290,000); (3) issuance of 4,394,285 Sheridan
Common Stock shares with a stated value of $0.01 ($44,000); (4) increase in
paid-in-capital resulting from the crediting of fresh start Senior Preferred
Stock value ($11,046,000), pre-fresh start accrued Senior Preferred dividends
($3,429,000), cancellation of Old Preferred Stock ($485,000) and TGX Common
Stock ($290,000) reduced by the issuance of Sheridan Common Stock ($44,000)
and post fresh start Old Preferred Stock dividends and other ($1,077,000); and
(5) reduction in accumulated deficit representing reversal of post fresh start
accrued Old Preferred Stock dividends ($1,147,000) and Senior Preferred Stock
dividend and accretion activity ($66,181,000) reduced by estimated additional
Merger expenses to be incurred ($130,000).     
 
  Pro forma statement of operations data merger adjustments consist of the
following: (1) a decrease in expenses related to reduced interest expense
resulting from debt retirement from the proceeds of the Litigation Settlement
(see below) ($154,000) and elimination of Merger expenses (see below) incurred
($440,000) and (2) elimination of all dividends and accretion expense
resulting from the cancellation of Preferred Stock ($19,247,000). The pro
forma statement of operations data acquisitions adjustments consists of an
increase in revenues ($1,030,000) and expenses ($510,000) to reflect the
impact of 1996 producing property acquisitions as if such had been acquired at
the beginning of 1996. See Note 12 of the consolidated financial statements
for additional information regarding 1996 producing property acquisitions.
 
  The sum of $225,000 paid to a former executive officer of the Company in
March 1997, as discussed in Note 14 of the consolidated financial statements,
is not reflected in the pro forma statement of operations data.
 
 Merger Expenses
 
  Merger expenses, consisting primarily of professional fees, proxy
preparation, printing and solicitation costs and stock issuance costs, are
charged to expense as incurred. The historical balance sheet and statement of
operations data reflects the expensing of the costs incurred through December
31, 1996 of $440,000. Additional
 
                                     F-26
<PAGE>
 
                    NOTES TO UNAUDITED PRO FORMA CONDENSED
                  COMBINED FINANCIAL INFORMATION--(CONTINUED)

Merger expenses of approximately $130,000 are estimated to be incurred in
1997. For pro forma balance sheet purposes the additional Merger expenses of
$130,000 are reflected as an increase in current liabilities and an increase
in accumulated deficit. For pro forma statement of operations data purposes
the actual Merger expenses incurred at December 31, 1996 of $440,000 are shown
as a decrease in expenses.
 
 Litigation Settlement
 
  On April 12, 1996, TGX entered into a Settlement Agreement with NFG and the
Public Service Commission of the State of New York. Pursuant to the Settlement
Agreement, TGX received $7,200,000 from NFG and all parties to the Settlement
Agreement have dismissed all claims and counterclaims against each other.
Pursuant to amended credit agreements with BMOF, 50% of the settlement
proceeds were paid to BMOF in
cancellation and full payment of the non-recourse secured note totaling
$5,468,000, including interest of $816,000. TGX recorded an extraordinary gain
for debt forgiveness of $1,831,000, net of income taxes of $37,000, in
conjunction with the $3,600,000 BMOF final payment. As a result of the NFG
settlement proceeds and $100,000 payment to another third party entitled to
participate in the proceeds, TGX recorded a net litigation settlement gain of
$7,100,000. TGX retained, after the BMOF and other third party payments,
$3,500,000 of settlement proceeds and a portion of such proceeds was used to
retire all of TGX's then outstanding bank debt of $900,000. Interest expense
associated with the Bank One debt and BMOF debt for the year ended
December 31, 1996 was $154,000. Accordingly, had the NFG settlement and
retirement of outstanding bank debt occurred at January 1, 1996, net income
(loss) applicable to common stock before extraordinary gain would have
increased by $154,000.
 
                                     F-27
<PAGE>
 
                                 APPENDIX "A"
 
                              AGREEMENT OF MERGER
   
  This Agreement of Merger (this "Agreement") is by and between Sheridan
Energy, Inc., a Delaware corporation ("SEI"), and TGX Corporation, a Delaware
corporation ("TGX"), and evidences that, in consideration of the mutual
obligations and covenants set forth in this Agreement, SEI and TGX agree as
follows:     
 
                                  ARTICLE I.
 
                         Surviving Corporation, Name,
                      Articles of Incorporation, Bylaws,
                            Directors and Officers
   
  A. SEI and TGX are sometimes hereinafter collectively referred to as the
"Constituent Corporations."     
   
  B. In accordance with the provisions of the Delaware General Corporation
Law, TGX will, at the Effective Time (as hereinafter defined), be merged with
and into SEI, and SEI will be the surviving corporation (the "Surviving
Corporation"). The merger of TGX into SEI is hereinafter referred to as the
"Merger." After the Merger, SEI will continue to exist under and to be
governed by the laws of the State of Delaware. Except as herein specifically
set forth, the identity, existence, purposes, powers, objectives, franchises,
privileges, rights and immunities of SEI will continue unaffected and
unimpaired by the Merger, and the corporate franchises, existence, assets,
liabilities and rights of TGX will be merged into SEI, which, as the Surviving
Corporation, will thereafter possess all the rights, privileges, immunities
and franchises, of a public as well as a private nature, of each of the
Constituent Corporations; and all property, real, personal and mixed, and all
debts due on whatever account, including subscriptions to shares, and all
other choses in action and every other interest of or belonging to or due to
each of the Constituent Corporations shall be deemed to be transferred to and
vested in the Surviving Corporation without further act or deed; and the title
to any real estate, or any interest therein, vested in either of the
Constituent Corporations shall not revert or be in any way impaired by reason
of the Merger. The separate existence and corporate organization of TGX,
except insofar as they may be continued by statute, will cease at the
Effective Time. The Merger of TGX into SEI is intended to satisfy the
requirements of Sections 368(a)(1)(A) and (E) of the Internal Revenue Code of
1986, as amended. The "Effective Time" shall be the time of filing of the
Articles of Merger with the Secretary of State of the State of Delaware.     
   
  C. At the Effective Time, the name of the Surviving Corporation shall be
"Sheridan Energy, Inc."     
   
  D. The Certificate of Incorporation of SEI as in effect immediately prior to
the Effective Time will be the Certificate of Incorporation of the Surviving
Corporation, without change, other than to reflect the name of the Surviving
Corporation.     
   
  E. The Bylaws of SEI in effect immediately prior to the Effective Time will
be the Bylaws of the Surviving Corporation, without change.     
 
  F. The board of directors of TGX in office immediately prior to the
Effective Time will be the board of directors of the Surviving Corporation,
and unless they sooner resign or are removed, they will hold office from the
Effective Time until their respective successors are elected and qualify.
 
  G. The officers of TGX in office immediately prior to the Effective Time
will be the officers of the Surviving Corporation, and unless they sooner
resign or are removed, they will hold their respective offices from the
Effective Time until their respective successors are elected or appointed.
 
                                      A-1
<PAGE>
 
                                  ARTICLE II.
 
                    Capitalization, Conversion and Exchange
                               of Capital Stock
 
  A. At the Effective Time, without any action on the part of the stockholder
of TGX, each outstanding share of $0.01 par value per share Series A Senior
Preferred Stock of TGX (the "Senior Preferred Stock") will automatically be
converted into and become a right to receive one-half (1/2) share of common
stock, $0.01 par value per share, of the Surviving Corporation, and all rights
with respect to accrued but unpaid dividends on the Senior Preferred Stock
shall automatically cease at the Effective Time. The new certificates issued
to the stockholders of the Surviving Corporation will bear the name of the
Surviving Corporation.
 
  B. At the Effective Time, without any action on the part of the stockholders
holding Common Stock of TGX, each outstanding share of $0.01 par value per
share Common Stock and any other class of preferred stock, except the Senior
Preferred Stock, of TGX will automatically be cancelled.
   
  C. At the Effective Time, without any action on the part of the stockholder
of SEI, each outstanding share of $0.01 par value per share common stock of
SEI will automatically be cancelled.     
 
  D. If holders of the outstanding shares of TGX Senior Preferred Stock and
any other class of preferred stock exercise appraisal rights with respect to
their shares pursuant to the Delaware General Corporation Law, such shares
will continue to be subject to the rights of such holders under the Delaware
General Corporation Law, but will not be deemed to be outstanding.
 
                                 ARTICLE III.
 
                  Conditions, Termination, and Effectiveness
 
  A. This Agreement will be submitted to the stockholders of the Constituent
Corporations for their approval and adoption at meetings to be duly called and
held or by unanimous written consent of stockholders in lieu of such meetings.
The Constituent Corporations will proceed expeditiously and cooperate fully in
the procurement of any other consents and approvals, the taking of any other
action and the satisfaction of all other requirements prescribed by law or
otherwise necessary for the consummation of the Merger.
 
  B. The respective obligations of each party to effect the merger shall be
subject to fulfillment at or prior to the Effective Time of each of the
following conditions:
 
    (i) This Agreement and the Merger shall have been approved by the
  stockholders of each of the Constituent Corporations in accordance with the
  Delaware General Corporation Law; and
 
    (ii) No action or proceeding by any governmental body or agency shall
  have been threatened, asserted, or instituted to restrain or prohibit the
  transactions contemplated by this Agreement.
 
  C. Upon satisfaction of the conditions set forth in the preceding paragraph,
the appropriate officers of the Constituent Corporations will execute and
verify, and cause to be filed, a Certificate of Merger in accordance with the
Delaware General Corporation Law.
 
                                  ARTICLE IV.
 
                                 Miscellaneous
 
  A. This Agreement may be executed in multiple counterparts, each of which
will be deemed an original and all of which together will constitute one
agreement.
 
                                      A-2
<PAGE>
 
   
  In order to evidence the foregoing, TGX and SEI have caused this Agreement
to be signed by the duly authorized officers as of the      day of         ,
1997.     
                                             
                                          SHERIDAN ENERGY, INC.     
                                          a Delaware corporation
 
                                          By:__________________________________
                                             Name: Jeffrey E. Susskind
                                             Title: Chairman of the Board
 
                                          TGX CORPORATION,
                                          a Delaware corporation
 
                                          By:__________________________________
                                             Name: Jeffrey E. Susskind
                                             Title: Chairman of the Board
 
                                      A-3
<PAGE>
 
                                 APPENDIX "B"
 
                        CERTIFICATE OF INCORPORATION OF
                            
                         GEOSTRAT RESOURCES, INC.     
   
  First: The name of the Corporation is GeoStrat Resources, Inc.     
 
  Second: The registered office of the Corporation in the State of Delaware is
located at 1013 Centre Road, Wilmington, Delaware 19805. The name and address
of its registered agent is Corporation Service Company.
 
  Third: The nature of the business, objects and purposes to be transacted,
promoted or carried on by the Corporation are:
 
    To engage in any lawful act or activity for which corporations may be
  organized under the General Corporation Law of Delaware, and by such
  statement all lawful acts and activities shall be within the purposes of
  the corporation, except for express limitations, if any.
 
  Fourth: The aggregate number of shares which the corporation has authority
to issue is Twenty Five Million (25,000,000) shares of One Cent ($0.01) par
value per share. Twenty Million (20,000,000) of such shares are designated as
Common Stock and shall have identical rights and privileges in every respect.
Five Million (5,000,000) of such shares are designated as Preferred Stock. The
shares of Preferred Stock may be issued from time to time in one or more
series. The Board of Directors is hereby expressly authorized to provide for
the issuance of all or any of the shares of the Preferred Stock in one or more
series, and to fix the number of shares and to determine or alter for each
such series, such voting powers, full or limited, or no voting powers, and
such designations, preferences, and relative participating, optional, or other
rights and such qualifications, limitations, or restrictions thereof, as shall
be stated and expressed in a resolution or resolutions adopted by the Board of
Directors providing for the issuance of such shares and as may be permitted by
the General Corporation Law of Delaware.
 
  Fifth: No stockholder shall have any preemptive right to subscribe to an
additional issue of stock or to any security convertible into such stock or
carrying a right to subscribe to or acquire shares of the corporation is
hereby denied.
 
  Sixth: Directors shall be elected by majority vote. No stockholder of the
corporation shall have the right to cumulate his votes in the election of
directors.
 
  Seventh: The name and mailing address of the incorporator is
 
                 Name                              Mailing Address
 
 
            Arthur S. Berner                    Winstead Sechrest & Minick
                                                P.C.
                                                910 Travis Street, Suite 1700
                                                Houston, Texas 77002
 
  Eighth: The corporation is to have perpetual existence.
 
  Ninth: In furtherance and not in limitation of the powers conferred by
statute, the Board of Directors is expressly authorized:
 
    (1) To make, alter or repeal the by-laws of the Corporation.
 
    (2) To authorize and cause to be executed mortgages and liens upon the
  real and personal property of the Corporation.
 
    (3) To set apart out of any of the funds of the Corporation available for
  dividends a reserve or reserves for any proper purpose and to abolish any
  such reserve in the manner in which it was created.
 
                                      B-1
<PAGE>
 
    (4) By a majority of the whole Board of Directors, to designate one or
  more committees, each committee to consist of one or more of the directors
  of the Corporation. The Board of Directors may designate one or more
  directors as alternate members of any committee, who may replace any absent
  or disqualified member at any meeting of the committee. Any such committee,
  to the extent provided in the resolution or in the by-laws of the
  Corporation, shall have and may exercise the powers of the Board of
  Directors in the management of the business and affairs of the Corporation
  and may authorize the seal of the Corporation to be affixed to all papers
  which may require it; provided, however, the by-laws may provide that in
  the absence or disqualification of any member of such committee or
  committees the member or members thereof present at any meeting and not
  disqualified from voting, whether or not he or they constitute a quorum,
  may unanimously appoint another member of the Board of Directors to act at
  the meeting in the place of any such absent or disqualified member.
 
    (5) When and as authorized by the affirmative vote of the holders of a
  majority of the stock issued and outstanding having voting power given at a
  stockholders' meeting duly called upon such notice as is required by
  statute, or when authorized by the written consent of the holders of a
  majority of the voting stock issued and outstanding, to sell, lease or
  exchange all or substantially all the property and assets of the
  Corporation, including its goodwill and its corporate franchises, upon such
  terms and conditions and for such consideration, which may consist in whole
  or in part of money or property including securities of any other
  corporation or corporations, as the Board of Directors shall deem expedient
  and for the best interests of the Corporation.
 
  Tenth: Meetings of stockholders may be held within or without the State of
Delaware, as the by-laws may provide. The books of the Corporation may be kept
(subject to any provision contained in the statutes) outside the State of
Delaware at such place or places as may be designated from time to time by the
Board of Directors or in the by-laws of the Corporation. Elections of
directors need not be by written ballot unless the by-laws of the Corporation
shall so provide.
 
  Whenever the vote of stockholders at a meeting thereof is required or
permitted to be taken for or in connection with any corporate action, the
meeting and vote of stockholders may be dispensed with and such action may be
taken with the written consent of stockholders having not less than the
minimum percentage of the vote required by statute for the proposed corporate
action, provided that prompt notice shall be given to all stockholders of the
taking of corporate action without a meeting and by less than unanimous
consent.
 
  Subject to the provisions of the General Corporation Law of Delaware, the
Certificate of Incorporation or by-laws for notice of meetings, and unless
otherwise restricted by this Certificate of Incorporation, stockholders may
participate in and hold a meeting by means of conference telephone or similar
communications equipment by means of which all persons participating in the
meeting can hear each other, and participation in such meeting shall
constitute attendance and presence in person at such meeting, except where a
person participates in the meeting for the express purpose of objecting to the
transaction of any business on the ground that the meeting is not lawfully
called or convened.
 
  Eleventh: The Corporation reserves the right to amend, alter, change or
repeal any provision contained in this Certificate of Incorporation, in the
manner now or hereafter prescribed by statute, and all rights conferred upon
stockholders herein are granted subject to this reservation.
 
  Twelfth: A director of the Corporation shall not be personally liable to the
Corporation or its stockholders for monetary damages for breach of fiduciary
duty as a director, except for liability (i) for any breach of the director's
duty of loyalty to the Corporation or its stockholders, (ii) for acts or
omissions not in good faith or which involve intentional misconduct or a
knowing violation of law, (iii) under Section 174 of the Delaware General
Corporation Law, as the same exists or hereafter may be amended, or (iv) for
any transaction from which the director derived an improper personal benefit.
If the Delaware General Corporation Law hereafter is amended to authorize the
further elimination or limitation on personal liability of directors, then the
liability of a director of the Corporation, in addition to the limitation on
personal liability provided herein, shall be limited to the fullest
 
                                      B-2
<PAGE>
 
extent permitted by the amended Delaware General Corporation Law. Any repeal
or modification of this paragraph by the stockholders of the Corporation shall
be prospective only, and shall not adversely affect any limitation on the
personal liability of a director of the Corporation existing at the time of
such repeal or modification.
 
  Thirteenth:
 
  (i) Each person who was or is made a party or is threatened to be made a
party to or is involved in any action, suit or proceeding, whether civil,
criminal, administrative or investigative (hereinafter a "proceeding"), by
reason of the fact that he or she, or a person of whom he or she is the legal
representative, is or was a director or officer, of the Corporation or is or
was serving at the request of the Corporation as a director, officer, employee
or agent of another corporation or of a partnership, joint venture, trust or
other enterprise, including service with respect to employee benefit plans,
whether the basis of such proceeding is alleged action in an official capacity
as a director, officer, employee or agent or in any other capacity while
serving as a director, officer, employee or agent shall be indemnified and
held harmless by the Corporation to the fullest extent authorized by the
Delaware General Corporation Law, as the same exists or may hereafter be
amended (but, in the case of any such amendment, only to the extent that such
amendment permits the Corporation to provide broader indemnification rights
than said law permitted the Corporation to provide prior to such amendment),
against all expense, liability and loss (including attorneys' fees, judgments,
fines, ERISA excise taxes or penalties and amounts paid or to be paid in
settlement) reasonably incurred or suffered by such person in connection
therewith and such indemnification shall continue as to a person who has
ceased to be a director, officer, employee or agent and shall inure to the
benefit of his or her heirs, executors and administrators: provided, however,
that except as provided in paragraph (b) hereof, the Corporation shall
indemnify any such person seeking indemnification in connection with a
proceeding (or part thereof) initiated by such person only if such proceeding
(or part thereof) was authorized by the board of directors of the Corporation.
The right to indemnification conferred in this Article Thirteenth shall be a
contract right and shall include the right to be paid by the Corporation the
expenses incurred in defending any such proceeding in advance of its final
disposition; provided, however, that, if the Delaware General Corporation Law
requires, the payment of such expenses incurred by a director or officer in
his or her capacity as a director or officer (and not in any other capacity in
which service was or is rendered by such person while a director or officer,
including, without limitation, service to an employee benefit plan) in advance
of the final disposition of a proceeding, shall be made only upon delivery to
the Corporation of an undertaking, by or on behalf of such director or
officer, to repay all amounts so advanced if it shall ultimately be determined
that such director or officer is not entitled to be indemnified under this
Article Thirteenth or otherwise. The Corporation may, by action of its Board
of Directors, provide indemnification to employees and agents of the
Corporation with the same scope and effect as the foregoing indemnification of
directors or officers.
 
  (ii) If a claim under paragraph (i) of this Article Thirteenth is not paid
in full by the Corporation within thirty days after a written claim has been
received by the Corporation, the claimant may at any time thereafter bring
suit against the Corporation to recover the unpaid amount of the claim and, if
successful in whole or in part, the claimant shall be entitled to be paid also
the expense of prosecuting such claim. It shall be a defense to any such
action (other than an action brought to enforce a claim for expenses incurred
in defending any proceeding in advance of its final disposition where the
required undertaking, if any is required, has been tendered to the
Corporation) that the claimant has not met the standards of conduct which make
it permissible under the Delaware General Corporation Law for the Corporation
to indemnify the claimant for the amount claimed, but the burden of proving
such defense shall be on the Corporation. Neither the failure of the
Corporation (including its Board of Directors, independent legal counsel, or
its stockholders) to have made a determination prior to the commencement of
such action that indemnification of the claimant is proper in the
circumstances because he or she has met the applicable standard of conduct set
forth in the Delaware General Corporation Law, nor an actual determination by
the Corporation (including its Board of Directors, independent legal counsel,
or its stockholders) that the claimant has not met such applicable standard or
conduct, shall be a defense to the action or create a presumption that the
claimant has not met the applicable standard of conduct.
 
                                      B-3
<PAGE>
 
  (iii) The right to indemnification and the payment of expenses incurred in
defending a proceeding in advance of its final disposition conferred in this
Article Thirteenth shall not be exclusive of any other right which any person
may have or hereafter acquire under any statute, provision of the Certificate
of Incorporation, by-law, agreement, vote of stockholders or disinterested
directors or otherwise.
 
  (iv) The Corporation may maintain insurance, at its expense, to protect
itself and any director, officer, employee or agent of the Corporation or
another corporation, partnership, joint venture, trust or other enterprise
against any such expense, liability or loss, whether or not the Corporation
would have the power to indemnify such person against such expense, liability
or loss under the Delaware General Corporation Law.
 
  Fourteenth:
 
  The names and mailing addresses of the directors, who shall serve until the
first annual meeting of the stockholders or until their successors are elected
and qualified are as follows:
 
<TABLE>
<CAPTION>
      NAME                   MAILING ADDRESS
      ----                 --------------------
      <S>                  <C>
      Larry H. Carpenter   222 Pennbright
                           Suite 200
                           Houston, Texas 77090
      Jeffrey E. Susskind  222 Pennbright
                           Suite 200
                           Houston, Texas 77090
      David H. Scheiber    222 Pennbright
                           Suite 200
                           Houston, Texas 77090
</TABLE>
 
  The number of the directors of the corporation shall be as specified in, or
determined in the manner provided in the by-laws.
 
  THE UNDERSIGNED, being the incorporator hereinbefore named, for the purpose
of forming a corporation pursuant to the General Corporation Law of the State
of Delaware, does make this Certificate, hereby declaring and certifying that
this is my act and deed and the facts herein stated are true, and accordingly
have hereunto set my hand this 27th day of June, 1996.
 
                                          -------------------------------------
                                          Arthur S. Berner
 
                                      B-4
<PAGE>
 
                            
                         CERTIFICATE OF AMENDMENT     
                      
                   TO THE CERTIFICATE OF INCORPORATION     
                                       
                                    OF     
                            
                         GEOSTRAT RESOURCES, INC.     
                              
                           (THE "CORPORATION")     
   
  Pursuant to the provisions of Section 242 of the General Corporation Law of
the State of Delaware, the undersigned Corporation adopts the following
Certificate of Amendment to its Certificate of Incorporation, which amends
Article I thereof so as to change the name of the Corporation.     
   
  FIRST: The name of the Corporation is GEOSTRAT RESOURCES, INC.     
   
  SECOND: The following amendment to the Certificate of Incorporation was
adopted on May 7, 1997:     
   
  Article I of the Certificate of Incorporation is hereby amended to read in
its entirety as follows:     
     
  "First: The name of the Corporation is Sheridan Energy, Inc."     
   
  THIRD: That in a Written Consent of the Sole Stockholder, prepared in
accordance with Section 228 of the General Corporation Law of the State of
Delaware, a majority of the outstanding shares entitled to vote thereon voted
in favor of the amendment.     
   
  FOURTH: This amendment has been duly adopted in accordance with Section 242
of the General Corporation Law of the State of Delaware.     
   
DATED: May 7, 1997     
                                             
                                          GEOSTRAT RESOURCES, INC.     
                                               
                                             /s/ Michael A. Gerlich     
                                             
                                          By:_____________________________     
                                                
                                             Michael A. Gerlich,     
                                                
                                             Chief Financial Officer     
 
                                      B-5
<PAGE>
 
                                  APPENDIX "C"
 
                                     BYLAWS
 
                                       OF
                              
                           SHERIDAN ENERGY, INC.     
 
                               ----------------
 
                               TABLE OF CONTENTS
 
<TABLE>
<CAPTION>
                                                                           PAGE
                                                                           ----
 <C>            <S>                                                        <C>

ARTICLE I.--OFFICES

    Section 1.  Registered Office..........................................  C-1
    Section 2.  Other Offices..............................................  C-1
 
ARTICLE II.--MEETINGS OF STOCKHOLDERS
 
    Section 1.  Place of Meetings..........................................  C-1
    Section 2.  Annual Meeting.............................................  C-1
    Section 3.  Special Meetings...........................................  C-1
    Section 4.  Notice.....................................................  C-1
    Section 5.  Voting List................................................  C-2
    Section 6.  Quorum.....................................................  C-2
    Section 7.  Required Vote; Withdrawal Of Quorum........................  C-2
    Section 8.  Method of Voting; Proxies..................................  C-2
    Section 9.  Record Date................................................  C-3
    Section 10. Action Without Meeting.....................................  C-4
    Section 11. Inspectors of Elections....................................  C-4
 
ARTICLE III.--DIRECTORS
 
    Section 1.  Management.................................................  C-4
    Section 2.  Number; Election...........................................  C-4
    Section 3.  Change in Number...........................................  C-4
    Section 4.  Removal....................................................  C-4
    Section 5.  Vacancies and Newly Created Directorships..................  C-5
    Section 6.  Election of Directors; Cumulative Voting Prohibited........  C-5
    Section 7.  Place of Meetings..........................................  C-5
    Section 8.  First Meetings.............................................  C-5
    Section 9.  Regular Meetings...........................................  C-5
    Section 10. Special Meetings...........................................  C-5
    Section 11. Quorum.....................................................  C-5
    Section 12. Action Without Meeting; Telephone Meetings.................  C-5
    Section 13. Chairman of the Board......................................  C-5
    Section 14. Compensation...............................................  C-6
 
ARTICLE IV.--COMMITTEES
 
    Section 1.  Designation................................................  C-6
    Section 2.  Number; Qualification; Term................................  C-6
    Section 3.  Authority..................................................  C-6
    Section 4.  Committee Changes; Removal.................................  C-6
    Section 5.  Alternate Members of Committees............................  C-6
    Section 6.  Regular Meetings...........................................  C-6
    Section 7.  Special Meetings...........................................  C-6
    Section 8.  Quorum; Majority Vote......................................  C-6
    Section 9.  Minutes....................................................  C-6
    Section 10. Compensation...............................................  C-7
    Section 11. Responsibility.............................................  C-7
</TABLE>
<PAGE>
 
                               TABLE OF CONTENTS
 
                                  (CONTINUED)
 
<TABLE>
<CAPTION>
                                                                           PAGE
                                                                           ----
 <C>            <S>                                                        <C>

ARTICLE V.--NOTICES
 
    Section 1.  Method....................................................   C-7
    Section 2.  Waiver....................................................   C-7
    Section 3.  Exception to Notice Requirement...........................   C-7
 
ARTICLE VI.--OFFICERS
 
    Section 1.  Officers..................................................   C-7
    Section 2.  Election..................................................   C-7
    Section 3.  Compensation..............................................   C-8
    Section 4.  Removal and Vacancies.....................................   C-8
    Section 5.  President.................................................   C-8
    Section 6.  Vice Presidents...........................................   C-8
    Section 7.  Secretary.................................................   C-8
    Section 8.  Assistant Secretaries.....................................   C-8
    Section 9.  Treasurer.................................................   C-8
    Section 10. Assistant Treasurers......................................   C-8
 
ARTICLE VII.--CERTIFICATES REPRESENTING SHARES
 
    Section 1.  Certificates..............................................   C-9
    Section 2.  Legends...................................................   C-9
    Section 3.  Lost Certificates.........................................   C-9
    Section 4.  Transfer of Shares........................................   C-9
    Section 5.  Registered Stockholders...................................   C-9
 
ARTICLE VIII.--GENERAL PROVISIONS
 
    Section 1.  Dividends.................................................   C-9
    Section 2.  Reserves..................................................   C-9
    Section 3.  Checks....................................................  C-10
    Section 4.  Fiscal Year...............................................  C-10
    Section 5.  Seal......................................................  C-10
    Section 6.  Indemnification...........................................  C-10
    Section 7.  Transactions with Directors and Officers..................  C-10
    Section 8.  Amendments................................................  C-10
    Section 9.  Table of Contents; Holdings...............................  C-10
</TABLE>
<PAGE>
 
                                    BYLAWS
 
                                      OF
                             
                          SHERIDAN ENERGY, INC.     
 
                              (THE "CORPORATION")
 
                                  ARTICLE I.
 
                                    OFFICES
 
  Section 1. Registered Office. The registered office of the Corporation shall
be at 1013 Centre Road, Wilmington, Delaware 19805.
 
  Section 2. Other Offices. The Corporation may also have offices at such
other places, both within and without the State of Delaware, as the Board of
Directors may from time to time determine or the business of the Corporation
may require.
 
                                  ARTICLE II.
 
                           MEETINGS OF STOCKHOLDERS
 
  Section 1. Place of Meetings. Meetings of stockholders for all purposes may
be held at such time and place, either within or without the State of
Delaware, as shall be stated in the notice of the meeting or in a duly
executed waiver of notice thereof.
 
  Section 2. Annual Meeting. An annual meeting of stockholders of the
Corporation shall be held each calendar year on such date and at such time as
shall be designated from time to time by the Board of Directors and stated in
the notice of the meeting or in a duly executed waiver of notice of such
meeting. At such meeting, the stockholders shall elect directors and transact
such other business as may properly be brought before the meeting.
 
  Section 3. Special Meetings. Special meetings of the stockholders, for any
purpose or purposes, unless otherwise prescribed by statute, the Certificate
of Incorporation or these Bylaws, may be called by the President, the Board of
Directors, or the holders of not less than ten percent (10%) of all shares
entitled to vote at the meetings. Business transacted at all special meetings
shall be confined to the purposes stated in the notice of the meeting.
 
  Section 4. Notice. Written or printed notice stating the place, date, and
hour of each meeting of the stockholders and, in the case of a special
meeting, the purpose or purposes for which the meeting is called, shall be
given not less than ten (10) nor more than sixty (60) days before the date of
the meeting, either personally or by mail, by or at the direction of the
President, the Secretary, or the officer or person(s) calling the meeting, to
each stockholder of record entitled to vote at such meeting. If such notice is
to be sent by mail, it shall be directed to such stockholder at his address as
it appears on the records of the Corporation, unless he shall have filed with
the Secretary of the Corporation a written request that notices to him be
mailed to some other address, in which case it shall be directed to him at
such other address. Notice of any meeting of stockholders shall not be
required to be given to any stockholder who shall attend such meeting in
person or by proxy and shall not, at the beginning of such meeting, object to
the transaction of any business because the meeting is not lawfully called or
convened, or who shall, either before or after the meeting, submit a signed
waiver of notice, in person or by proxy.
 
                                      C-1
<PAGE>
 
  Section 5. Voting List. At least ten (10) days before each meeting of
stockholders, the Secretary or other officer of the Corporation who has charge
of the Corporation's stock ledger, either directly or through another officer
appointed by him or through a transfer agent appointed by the Board of
Directors, shall prepare a complete list of the stockholders entitled to vote
at the meeting, arranged in alphabetical order and showing the address of each
stockholder and the number of shares registered in the name of each
stockholder. Such list shall be open to the examination of any stockholder,
for any purpose germane to the meeting, during ordinary business hours, for a
period of at least ten (10) days prior to the meeting, either at a place
within the city where the meeting is to be held, which place shall be
specified in the notice of the meeting or a duly executed waiver of notice of
such meeting or, if not so specified, at the place where the meeting is to be
held. Such list shall also be produced and kept at the time and place of the
meeting at all times during such meeting and may be inspected by any
stockholder who is present.
 
  Section 6. Quorum. The holders of a majority of the outstanding shares
entitled to vote on a matter, present in person or represented by proxy, shall
constitute a quorum at any meeting of stockholders, except as otherwise
provided by statute, the Certificate of Incorporation or these Bylaws. If a
quorum shall not be present at any meeting of stockholders, the stockholders
entitled to vote thereat who are present, in person or by proxy, or, if no
stockholder entitled to vote is present, any officer of the Corporation, may
adjourn the meeting from time to time until a quorum shall be present. When a
meeting is adjourned to another time or place, notice need not be given of the
adjourned meeting if the time and place are announced at the meeting at which
the adjournment is taken. At any adjourned meeting at which a quorum shall be
present, any business may be transacted which might have been transacted at
the original meeting had a quorum been present; provided that, if the
adjournment is for more than thirty (30) days or if after the adjournment a
new record date is fixed for the adjourned meeting, a notice of the adjourned
meeting shall be given to each stockholder of record entitled to vote at the
adjourned meeting.
 
  Section 7. Required Vote; Withdrawal Of Quorum. When a quorum is present at
any meeting, the vote of the holders of at least a majority of the outstanding
shares entitled to vote who are present, in person or by proxy, shall decide
any question brought before the meeting, unless the question is one on which,
by express provision of statute, the Certificate of Incorporation or these
Bylaws, a different vote is required, in which case such express provision
shall govern and control the decision of the question. The stockholders
present at a duly constituted meeting may continue to transact business until
adjournment, notwithstanding the withdrawal of enough stockholders to leave
less than a quorum.
 
  Section 8. Method of Voting; Proxies. (a) Each outstanding share, regardless
of class, shall be entitled to one vote on each matter submitted to a vote at
a meeting of stockholders, except to the extent that the voting rights of the
shares of any class or classes are limited, denied, increased or decreased by
the Certificate of Incorporation.
 
  (b) Each stockholder entitled to vote at a meeting of stockholders or to
express consent or dissent to corporate action in writing without a meeting
may authorize another person or persons to act for him by proxy, but no such
proxy shall be voted or acted upon after three (3) years from its date, unless
the proxy provides for a longer period. Each proxy shall be filed with the
Secretary of the Corporation prior to or at the time of the meeting.
 
  (c) Without limiting the manner in which a stockholder may authorize another
person or persons to act for him as proxy pursuant to subsection (b) of this
section, the following shall constitute a valid means by which a stockholder
may grant such authority:
 
    (i) A stockholder may execute a writing authorizing another person or
  persons to act for him as proxy. Execution may be accomplished by the
  stockholder or by an authorized officer, director, employee or agent of the
  stockholder signing such writing or causing such stockholder's signature to
  be affixed to such writing by any reasonable means including, but not
  limited to, by facsimile signature.
 
                                      C-2
<PAGE>
 
    (ii) A stockholder may authorize another person or persons to act for him
  as proxy by transmitting or authorizing the transmission of a telegram,
  cablegram, or other means of electronic transmission to the person who will
  be the holder of the proxy or to a proxy solicitation firm, proxy support
  service organization or like agent duly authorized by the person who will
  be the holder of the proxy to receive such transmission, provided that any
  such telegram, cablegram or other means of electronic transmission must
  either set forth or be submitted with information from which it can be
  determined that the telegram, cablegram or other electronic transmission
  was authorized by the stockholder. If it is determined that such telegrams,
  cablegrams or other electronic transmissions are valid, the inspectors or,
  if there are no inspectors, such other persons making that determination
  shall specify the information upon which they relied.
 
  (d) Any copy, facsimile telecommunication or other reliable reproduction of
the writing or transmission created pursuant to subsection (c) of this section
may be substituted or used in lieu of the original writing or transmission for
any and all purposes for which the original writing or transmission could be
used, provided that such copy, facsimile telecommunication or other
reproduction shall be a complete reproduction of the entire original writing
or transmission.
 
  (e) A duly executed proxy shall be irrevocable if it states that it is
irrevocable and if, and only as long as, it is coupled with an interest
sufficient in law to support an irrevocable power.
 
  Section 9. Record Date. (a) In order that the Corporation may determine the
stockholders entitled to notice of or to vote at any meeting of stockholders
or any adjournment thereof, the Board of Directors may fix a record date,
which record date shall not precede the date upon which the resolution fixing
the record date is adopted by the Board of Directors, and which record date
shall not be more than sixty (60) nor less than ten (10) days before the date
of such meeting. If no record date is fixed by the Board of Directors, the
record date for determining stockholders entitled to notice of or to vote at a
meeting of stockholders shall be at the close of business on the day next
preceding the day on which notice is given, or, if notice is waived, at the
close of business on the day next preceding the day on which the meeting is
held. A determination of stockholders of record entitled to notice of or to
vote at a meeting of stockholders shall apply to any adjournment of the
meeting; provided, however, that the Board of Directors may fix a new record
date for the adjourned meeting.
 
  (b) In order that the Corporation may determine the stockholders entitled to
consent to corporate action in writing without a meeting, the Board of
Directors may fix a record date, which record date shall not precede the date
upon which the resolution fixing the record date is adopted by the Board of
Directors, and which date shall not be more than ten (10) days after the date
upon which the resolution fixing the record date is adopted by the Board of
Directors. If no record date has been fixed by the Board of Directors, the
record date for determining stockholders entitled to consent to corporate
action in writing without a meeting, when no prior action by the Board of
Directors is required by statute or these Bylaws, shall be the first date on
which a signed written consent setting forth the action taken or proposed to
be taken is delivered to the Corporation by delivery to its registered office
in Delaware, its principal place of business, or an officer or agent of the
Corporation having custody of the book in which proceedings of meetings of
stockholders are recorded. Such delivery shall be by hand or by certified or
registered mail, return receipt requested. If no record date has been fixed by
the Board of Directors and prior action by the Board of Directors is required
by statute or these Bylaws, the record date for determining stockholders
entitled to consent to corporate action in writing without a meeting shall be
at the close of business on the day on which the Board of Directors adopts the
resolution taking such prior action.
 
  (c) In order that the Corporation may determine the stockholders entitled to
receive payment of any dividend or other distribution or allotment of any
rights or the stockholders entitled to exercise any rights in respect of any
change, conversion or exchange of stock, or for the purpose of any other
lawful action, the Board of Directors may fix a record date, which record date
shall not precede the date upon which the resolution fixing the record date is
adopted, and which record date shall be not more than sixty (60) days prior to
such action. If no record date is fixed, the record date for determining
stockholders for any such purpose shall be at the close of business on the day
on which the Board of Directors adopts the resolution relating thereto.
 
                                      C-3
<PAGE>
 
  Section 10. Action Without Meeting. (a) Any action required or permitted to
be taken at a meeting of the stockholders of the Corporation may be taken
without a meeting, without prior notice and without a vote, if a consent or
consents in writing, setting forth the action so taken, shall be signed by the
holders of outstanding stock having not less than the minimum number of votes
that would be necessary to authorize or take such action at a meeting at which
all shares entitled to vote thereon were present and voted. Such consent or
consents shall be delivered to the Corporation at its registered office in
Delaware, its principal place of business, or an officer or agent of the
Corporation having custody of the book in which proceedings of stockholders'
meetings are recorded. Such delivery shall be by hand or by certified or
registered mail, return receipt requested.
 
  (b) Every written consent shall bear the date of signature of each
stockholder who signs the written consent, and no consent shall be effective
to take the corporate action referred to therein unless, within sixty (60)
days of the earliest dated consent delivered in the manner required by this
section to the Corporation, written consents signed by a sufficient number of
stockholders to take action are delivered to the Corporation in the manner
required by this section.
 
  Section 11. Inspectors of Elections. The Board of Directors may, in advance
of any meeting of stockholders, appoint one or more inspectors to act at such
meeting or any adjournment thereof. If any of the inspectors so appointed
shall fail to appear or act, the chairman of the meeting shall, or if
inspectors shall not have been appointed, the chairman of the meeting may,
appoint one or more inspectors. Each inspector, before entering upon the
discharge of his duties, shall take and sign an oath faithfully to execute the
duties of inspector at such meeting with strict impartiality and according to
the best of his ability. The inspectors shall determine the number of shares
of capital stock of the Corporation outstanding and the voting power of each,
the number of shares represented at the meeting, the existence of a quorum,
and the validity and effect of proxies and shall receive votes, ballots, or
consents, hear and determine all challenges and questions arising in
connection with the right to vote, count and tabulate all votes, ballots, or
consents, determine the results, and do such acts as are proper to conduct the
election or vote with fairness to all stockholders. On request of the chairman
of the meeting, the inspectors shall make a report in writing of any
challenge, request, or matter determined by them and shall execute a
certificate of any fact found by them. No director or candidate for the office
of director shall act as an inspector of an election of directors. Inspectors
need not be stockholders.
 
                                 ARTICLE III.
 
                                   DIRECTORS
 
  Section 1. Management. The business and affairs of the Corporation shall be
managed by its Board of Directors who may exercise all such powers of the
Corporation and do all such lawful acts and things as are not by statute, the
Certificate of Incorporation or these Bylaws directed or required to be
exercised or done by the stockholders. The Board of Directors shall keep
regular minutes of its proceedings.
 
  Section 2. Number; Election. The Board of Directors shall consist of no less
than one (1) nor more than fifteen (15) directors, who need not be
stockholders or residents of the State of Delaware. The directors shall be
elected at the annual meeting of the stockholders, except as hereinafter
provided, and each director elected shall hold office until his successor is
elected and qualified or until his earlier resignation or removal.
 
  Section 3. Change in Number. The number of directors may be increased or
decreased from time to time by resolution adopted by the affirmative vote of a
majority of the Board of Directors, but no decrease shall have the effect of
shortening the term of any incumbent director.
 
  Section 4. Removal. Any director may be removed, with or without cause, at
any annual or special meeting of stockholders, by the affirmative vote of the
holders of a majority of the shares represented in person or by proxy at such
meeting and entitled to vote for the election of such director, if notice of
the intention to act upon such matters shall have been given in the notice
calling such meeting.
 
                                      C-4
<PAGE>
 
  Section 5. Vacancies and Newly Created Directorships. Vacancies and newly-
created directorships resulting from any increase in the authorized number of
directors may be filled by a majority of the directors then in office,
although less than a quorum, or by a sole remaining director. Each director so
chosen shall hold office until the first annual meeting of stockholders held
after his election and until his successor is elected and qualified or until
his earlier resignation or removal. If at any time there are no directors in
office, an election of directors may be held in the manner provided by
statute. Except as otherwise provided in these Bylaws, when one or more
directors shall resign from the Board of Directors, effective at a future
date, a majority of the directors then in office, including those who have so
resigned, shall have the power to fill such vacancy or vacancies, the vote
thereon to take effect when such resignation or resignations shall become
effective, and each director so chosen shall hold office as provided in these
Bylaws with respect to the filling of other vacancies.
 
  Section 6. Election of Directors; Cumulative Voting Prohibited. At every
election of directors, each stockholder shall have the right to vote in person
or by proxy the number of voting shares owned by him for as many persons as
there are directors to be elected and for whose election he has a right to
vote. Cumulative voting shall be prohibited.
 
  Section 7. Place of Meetings. The directors of the Corporation may hold
their meetings, both regular and special, either within or without the State
of Delaware.
 
  Section 8. First Meetings. The first meeting of each newly elected Board
shall be held without further notice immediately following the annual meeting
of stockholders, and at the same place, unless by unanimous consent of the
directors then elected and serving, such time or place shall be changed.
 
  Section 9. Regular Meetings. Regular meetings of the Board of Directors may
be held without notice at such time and place as shall from time to time be
determined by the Board of Directors.
 
  Section 10. Special Meetings. Special meetings of the Board of Directors may
be called by the President on three (3) days' notice to each director, either
personally or by mail or by telegram. Special meetings may be called in like
manner and on like notice on the written request of any one of the directors.
Except as may be otherwise expressly provided by statute, the Certificate of
Incorporation or these Bylaws, neither the business to be transacted at, nor
the purpose of, any special meeting need be specified in a notice or waiver of
notice.
 
  Section 11. Quorum. At all meetings of the Board of Directors, the presence
of a majority of the directors shall be necessary and sufficient to constitute
a quorum for the transaction of business, and the vote of a majority of the
directors present at any meeting at which a quorum is present shall be the act
of the Board of Directors, except as may be otherwise specifically provided by
statute, or the Certificate of Incorporation or these Bylaws. If a quorum
shall not be present at any meeting of directors, the directors present
thereat may adjourn the meeting from time to time, without notice other than
announcement at the meeting, until a quorum shall be present.
 
  Section 12. Action Without Meeting; Telephone Meetings. Any action required
or permitted to be taken at a meeting of the Board of Directors or of any
committee thereof may be taken without a meeting if a consent in writing,
setting forth the action so taken, is signed by all the members of the Board
of Directors or committee, as the case may be. Such consent shall have the
same force and effect as a unanimous vote at a meeting. Subject to applicable
notice provisions and unless otherwise restricted by the Certificate of
Incorporation, members of the Board of Directors, or any committee designated
by the Board of Directors, may participate in and hold a meeting by means of
conference telephone or similar communications equipment by means of which all
persons participating in the meeting can hear each other, and participation in
such meeting shall constitute presence in person at such meeting, except where
a person's participation is for the express purpose of objecting to the
transaction of any business on the ground that the meeting is not lawfully
called or convened.
 
  Section 13. Chairman of the Board. The Board of Directors may elect a
Chairman of the Board to preside at their meetings and to perform such other
duties as the Board of Directors may from time to time assign to him.
 
                                      C-5
<PAGE>
 
  Section 14. Compensation. Directors, as such, shall not receive any stated
salary for their services, but, by resolution of the Board of Directors, a
fixed sum and expenses of attendance, if any, may be allowed for attendance at
each regular or special meeting of the Board of Directors; provided, that
nothing herein contained shall be construed to preclude any director from
serving the Corporation in any other capacity and receiving compensation
therefor.
 
                                  ARTICLE IV.
 
                                  COMMITTEES
 
  Section 1. Designation. The Board of Directors may, by resolution passed by
a majority of the entire Board of Directors, designate one or more committees.
 
  Section 2. Number; Qualification; Term. Each committee shall consist of one
or more directors appointed by resolution adopted by a majority of the entire
Board of Directors. The number of committee members may be increased or
decreased from time to time by resolution adopted by a majority of the entire
Board of Directors. Each committee member shall serve as such until the
earliest of (i) the expiration of his term as director, (ii) his resignation
as a committee member or as a director, or (iii) his removal as a committee
member or as a director.
 
  Section 3. Authority. Each committee, to the extent expressly provided in
the resolution of the Board of Directors establishing such committee, or these
Bylaws, shall have and may exercise all of the authority of the Board of
Directors in the management of the business and affairs of the Corporation
except to the extent expressly restricted by statute, the Certificate of
Incorporation or these Bylaws. Any executive committee created pursuant to the
provisions of this Article IV shall have the authority and power to declare a
dividend, to authorize the issuance of stock or to adopt a certificate of
ownership and merger pursuant to the General Corporation Law of Delaware.
 
  Section 4. Committee Changes; Removal. The Board of Directors shall have the
power at any time to fill vacancies in, to change the membership of, and to
discharge any committee. The Board of Directors may remove any committee
member, at any time, with or without cause.
 
  Section 5. Alternate Members of Committees. The Board of Directors may
designate one or more directors as alternate members of any committee. Any
such alternate member may replace any absent or disqualified member at any
meeting of the committee.
 
  Section 6. Regular Meetings. Regular meetings of any committee may be held
without notice at such time and place as may be designated from time to time
by the committee and communicated to all members thereof.
 
  Section 7. Special Meetings. Special meetings of any committee may be held
whenever called by any committee member. The committee member calling any
special meeting shall cause notice of such special meeting, including therein
the time and place of such special meeting, to be given to each committee
member at least two (2) days before such special meeting. Neither the business
to be transacted at, nor the purpose of, any special meeting of any committee
need be specified in the notice or waiver of notice of any special meeting.
 
  Section 8. Quorum; Majority Vote. At meetings of any committee, a majority
of the number of members designated by the Board of Directors shall constitute
a quorum for the transaction of business. If a quorum is not present at a
meeting of any committee, a majority of the members present may adjourn the
meeting from time to time, without notice other than an announcement at the
meeting, until a quorum is present. The act of a majority of the members
present at any meeting at which a quorum is in attendance shall be the act of
a committee, unless the act of a greater number is required by law, the
Certificate of Incorporation or these Bylaws.
 
  Section 9. Minutes. Each committee shall cause minutes of its proceedings to
be prepared and shall report the same to the Board of Directors upon the
request of the Board of Directors. The minutes of the proceedings of each
committee shall be delivered to the Secretary of the Corporation for placement
in the minute books of the Corporation.
 
                                      C-6
<PAGE>
 
  Section 10. Compensation. Committee members may, by resolution of the Board
of Directors, be allowed a fixed sum and expenses of attendance, if any, for
attending any committee meetings or a stated salary.
 
  Section 11. Responsibility. The designation of any committee and the
delegation of authority to it shall not operate to relieve the Board of
Directors or any director of any responsibility imposed upon it or such
director by law.
 
                                  ARTICLE V.
 
                                    NOTICES
 
  Section 1. Method. Whenever by statute, the Certificate of Incorporation, or
these Bylaws, notice is required to be given to any committee member,
director, or stockholder and no provision is made as to how such notice shall
be given, personal notice shall not be required, and any such notice may be
given (a) in writing, by mail, postage prepaid, addressed to such committee
member, director, or stockholder at his address as it appears on the books or
(in the case of a stockholder) the stock transfer records of the Corporation,
or (b) by any other method permitted by law (including but not limited to
overnight courier service, telegram, telex, or telefax). Any notice required
or permitted to be given by mail shall be deemed to be given when deposited in
the United States mail as aforesaid. Any notice required or permitted to be
given by overnight courier service shall be deemed to be given at the time
delivered to such service with all charges prepaid and addressed as aforesaid.
Any notice required or permitted to be given by telegram, telex, or telefax
shall be deemed to be delivered and given at the time transmitted with all
charges prepaid and addressed as aforesaid.
 
  Section 2. Waiver. Whenever any notice is required to be given to any
stockholder, director, or committee member of the Corporation by statute, the
Certificate of Incorporation or these Bylaws, a written waiver thereof, signed
by the person or persons entitled to such notice, whether before or after the
time stated therein, shall be equivalent to notice. Attendance of a
stockholder, director, or committee member at a meeting shall constitute a
waiver of notice of such meeting, except when the person attends for the
express purpose of objecting at the beginning of the meeting to the
transaction of any business on the ground that the meeting is not lawfully
called or convened.
 
  Section 3. Exception to Notice Requirement. The giving of any notice
required under any provision of the General Corporation Law of Delaware, the
Certificate of Incorporation or these Bylaws shall not be required to be given
to any stockholder to whom (i) notice of two consecutive annual meetings, and
all notices of meetings or of the taking of action by written consent without
a meeting to such stockholder during the period between such two consecutive
annual meetings, or (ii) all, and at least two, payments (if sent by first
class mail) of dividends or interest on securities during a twelve-month
period, have been mailed addressed to such person at his address as shown on
the records of the Corporation and have been returned undeliverable. If any
such stockholder shall deliver to the Corporation a written notice setting
forth his then current address, the requirement that notice be given to such
stockholder shall be reinstated.
 
                                  ARTICLE VI.
 
                                   OFFICERS
 
  Section 1. Officers. The officers of the Corporation shall be elected by the
directors and shall be a President and a Secretary. The Board of Directors may
also choose a Chairman of the Board, additional Vice Presidents and one or
more Assistant Secretaries and Assistant Treasurers. Any two or more offices
may be held by the same person.
 
  Section 2. Election. The Board of Directors at its first meeting after each
annual meeting of stockholders shall elect the officers of the Corporation,
none of whom need be a member of the Board, a stockholder or a resident of the
State of Delaware. The Board of Directors may appoint such other officers and
agents as it shall
 
                                      C-7
<PAGE>
 
deem necessary, who shall be appointed for such terms and shall exercise such
powers and perform such duties as shall be determined from time to time by the
Board of Directors.
 
  Section 3. Compensation. The compensation of all officers and agents of the
Corporation shall be fixed by the Board of Directors.
 
  Section 4. Removal and Vacancies. Each officer of the Corporation shall hold
office until his successor is elected and qualified or until his earlier
resignation or removal. Any officer or agent elected or appointed by the Board
of Directors may be removed either for or without cause by a majority of the
directors represented at a meeting of the Board of Directors at which a quorum
is represented, whenever in the judgment of the Board of Directors the best
interests of the Corporation will be served thereby, but such removal shall be
without prejudice to the contract rights, if any, of the person so removed. If
the office of any officer becomes vacant for any reason, the vacancy may be
filled by the Board of Directors.
 
  Section 5. President. The President shall be the chief executive officer of
the Corporation. He shall preside at all meetings of the stockholders and the
Board of Directors unless the Board of Directors shall elect a Chairman of the
Board, in which event the President shall preside at Board meetings in the
absence of the Chairman of the Board. The President shall have general and
active management of the business and affairs of the Corporation, shall see
that all orders and resolutions of the Board are carried into effect, and
shall perform such other duties as the Board of Directors shall prescribe.
 
  Section 6. Vice Presidents. Each Vice President shall have only such powers
and perform only such duties as the Board of Directors may from time to time
prescribe or as the President may from time to time delegate to him.
 
  Section 7. Secretary. The Secretary shall attend all sessions of the Board
of Directors and all meetings of the stockholders and record all votes and the
minutes of all proceedings in a book to be kept for that purpose and shall
perform like duties for any committee when required. Except as otherwise
provided herein, the Secretary shall give, or cause to be given, notice of all
meetings of the stockholders and special meetings of the Board of Directors,
and shall perform such other duties as may be prescribed by the Board of
Directors or President, under whose supervision he shall be. He shall keep in
safe custody the seal of the Corporation and, when authorized by the Board of
Directors, affix the same to any instrument requiring it, and, when so
affixed, it shall be attested by his signature or by the signature of the
Treasurer or an Assistant Secretary.
 
  Section 8. Assistant Secretaries. Each Assistant Secretary shall have only
such powers and perform only such duties as the Board of Directors may from
time to time prescribe or as the President may from time to time delegate.
 
  Section 9. Treasurer. The Treasurer shall have the custody of the corporate
funds and securities and shall keep full and accurate accounts of receipts and
disbursements of the Corporation and shall deposit all monies and other
valuable effects in the name and to the credit of the Corporation in such
depositories as may be designated by the Board of Directors. He shall disburse
the funds of the Corporation as may be ordered by the Board of Directors,
taking proper vouchers for such disbursements, and shall render to the
President and directors, at the regular meetings of the Board of Directors, or
whenever they may require it, an account of all his transactions as Treasurer
and of the financial condition of the Corporation, and shall perform such
other duties as the Board of Directors may prescribe. If required by the Board
of Directors, he shall give the Corporation a bond in such form, in such sum,
and with such surety or sureties as shall be satisfactory to the Board of
Directors for the faithful performance of the duties of his office and for the
restoration to the Corporation, in case of his death, resignation, retirement
or removal from office, of all books, papers, vouchers, money, and other
property of whatever kind in his possession or under his control belonging to
the Corporation.
 
  Section 10. Assistant Treasurers. Each Assistant Treasurer shall have only
such powers and perform only such duties as the Board of Directors may from
time to time prescribe.
 
 
                                      C-8
<PAGE>
 
                                 ARTICLE VII.
 
                       CERTIFICATES REPRESENTING SHARES
 
  Section 1. Certificates. The shares of the Corporation shall be represented
by certificates in such form as shall be determined by the Board of Directors.
Such certificates shall be consecutively numbered and shall be entered in the
books of the Corporation as they are issued. Each certificate shall state on
the face thereof the holder's name, the number and class of shares, and the
par value of such shares or a statement that such shares are without par
value. Each certificate shall be signed by the President or a Vice President
and by the Secretary or an Assistant Secretary and may be sealed with the seal
of the Corporation or a facsimile thereof. Any or all of the signatures on a
certificate may be facsimile.
 
  Section 2. Legends. The Board of Directors shall have the power and
authority to provide that certificates representing shares of stock shall bear
such legends, including, without limitation, such legends as the Board of
Directors deems appropriate to assure that the Corporation does not become
liable for violations of federal or state securities laws or other applicable
law.
 
  Section 3. Lost Certificates. The Corporation may issue a new certificate
representing shares in place of any certificate theretofore issued by the
Corporation, alleged to have been lost, stolen or destroyed, upon the making
of an affidavit of that fact by the person claiming the certificate to be
lost, stolen or destroyed. The Board of Directors, in its discretion and as a
condition precedent to the issuance thereof, may require the owner of such
lost, stolen or destroyed certificate, or his legal representative, to
advertise the same in such manner as it shall require and/or to give the
Corporation a bond in such form, in such sum, and with such surety or sureties
as it may direct as indemnity against any claim that may be made against the
Corporation with respect to the certificate alleged to have been lost, stolen
or destroyed.
 
  Section 4. Transfer of Shares. Shares of stock shall be transferable only on
the books of the Corporation by the holder thereof in person or by his duly
authorized attorney. Upon surrender to the Corporation or the transfer agent
of the Corporation of a certificate representing shares duly endorsed or
accompanied by proper evidence of succession, assignment or authority to
transfer, it shall be the duty of the Corporation or the transfer agent of the
Corporation to issue a new certificate to the person entitled thereto, cancel
the old certificate and record the transaction upon its books.
 
  Section 5. Registered Stockholders. The Corporation shall be entitled to
treat the holder of record of any share or shares of stock as the holder in
fact thereof, and, accordingly, shall not be bound to recognize any equitable
or other claim or interest in such share or shares on the part of any other
person, whether or not it shall have express or other notice thereof, except
as otherwise provided by law.
 
                                 ARTICLE VIII.
 
                              GENERAL PROVISIONS
 
  Section 1. Dividends. The directors, subject to any restrictions contained
in the Certificate of Incorporation, may declare dividends upon the shares of
the Corporation's capital stock. Dividends may be paid in cash, in property,
or in shares of the Corporation, subject to the provisions of the General
Corporation Law of Delaware and the Certificate of Incorporation.
 
  Section 2. Reserves. By resolution of the Board of Directors, the directors
may set apart out of any of the funds of the Corporation such reserve or
reserves as the directors from time to time, in their discretion, think proper
to provide for contingencies, or to equalize dividends, or to repair or
maintain any property of the Corporation, or for such other purposes as the
directors shall think beneficial to the Corporation, and the directors may
modify or abolish any such reserve in the manner in which it was created.
 
 
                                      C-9
<PAGE>
 
  Section 3. Checks. All checks or demands for money and notes of the
Corporation shall be signed by such officer or officers or such other person
or persons as the Board of Directors may from time to time designate.
 
  Section 4. Fiscal Year. The fiscal year of the Corporation shall be fixed by
resolution of the Board of Directors.
 
  Section 5. Seal. The corporate seal shall have inscribed thereon the name of
the Corporation. Said seal may be used by causing it or a facsimile thereof to
be impressed or affixed or reproduced or otherwise.
 
  Section 6. Indemnification. The Corporation shall indemnify its directors,
officers, employees and agents to the fullest extent permitted by the General
Corporation Law of Delaware and the Certificate of Incorporation.
 
  Section 7. Transactions with Directors and Officers. No contract or other
transaction between the Corporation and any other corporation and no other act
of the Corporation shall, in the absence of fraud, be invalidated or in any
way affected by the fact that any of the directors of the Corporation are
pecuniarily or otherwise interested in such contract, transaction or other
act, or are directors or officers of such other corporation. Any director of
the Corporation, individually, or any firm or corporation of which any such
director may be a member, may be a party to, or may be pecuniarily or
otherwise interested in, any contract or transaction of the Corporation;
provided, however, that the fact that the director, individually, or the firm
or corporation is so interested shall be disclosed or shall have been known to
the Board of Directors or a majority of such members thereof as shall be
present at any annual meeting or at any special meeting, called for that
purpose, of the Board of Directors at which action upon any contract or
transaction shall be taken. Any director of the Corporation who is so
interested may be counted in determining the existence of a quorum at any such
annual or special meeting of the Board of Directors which authorizes such
contract or transaction, and may vote thereat to authorize such contract or
transaction with like force and effect as if he were not such director or
officer of such other corporation or not so interested. Every director of the
Corporation is hereby relieved from any disability which might otherwise
prevent him from carrying out transactions with or contracting with the
Corporation for the benefit of himself or any firm, corporation, trust or
organization in which or with which he may be in anywise interested or
connected.
 
  Section 8. Amendments. These Bylaws may be altered, amended, or repealed or
new bylaws may be adopted by the stockholders or by the Board of Directors at
any regular meeting of the stockholders or the Board of Directors, at any
special meeting of the stockholders or the Board of Directors if notice of
such alteration, amendment, repeal, or adoption of new bylaws be contained in
the notice of such special meeting, or by written consent of the Board of
Directors or the stockholders without a meeting.
 
  Section 9. Table of Contents; Headings. The Table of Contents and headings
used in these Bylaws have been inserted for convenience only and do not
constitute matters to be construed in interpretation.
 
 
 
                                     C-10
<PAGE>
 
                                 APPENDIX "D"
 
                         OPINION OF FINANCIAL ADVISOR
 
March 21, 1997
 
Board of Directors
TGX Corporation
222 Pennbright, Suite 200
Houston, Texas 77090
 
Dear Members of the Board:
   
The stockholders of TGX Corporation ("TGX" or the "Company") are being asked
to consider and adopt an Agreement of Merger between TGX and Sheridan Energy,
Inc. ("Sheridan"), a newly formed Delaware Corporation and wholly-owned
subsidiary of TGX, pursuant to which TGX will merge with and into Sheridan
("the Merger").     
 
Under the terms of the Agreement of Merger, the following will occur:
     
  . Each share of the Company's Series A Preferred Stock, par value $1.00 per
    share ("Senior Preferred Stock") outstanding immediately prior to the
    Merger will be automatically converted into and become a right to receive
    one-half ( 1/2) share of Sheridan common stock ("New Common Stock"); all
    rights to accrued and unpaid dividends will automatically cease and
    dividends will cease to accrue; and     
 
  . Each share of Old Preferred Stock and Common Stock of TGX ("Common
    Stock") outstanding immediately prior to the Merger will automatically be
    canceled upon consummation of Merger.
   
All fractional shares of New Common Stock that holders of TGX Senior Preferred
stock would be entitled to receive, in lieu thereof, an amount in cash
determined by multiplying $2.52 by the fraction of a share of Sheridan common
stock to which such holder would otherwise have been entitled. The $2.52 is
based on TGX Corporation's book value on December 31, 1996 of $11,050,549
divided by the number New Common Shares issued and outstanding, 4,394,285.
    
You have engaged us as your independent financial advisor to express an
opinion as to whether the terms of the proposed Merger are fair, from a
financial point of view, to the shareholders of TGX.
   
American Appraisal Associates, Inc. ("American Appraisal"), as part of its
financial advisory services, is regularly and continually engaged in the
valuation of businesses and securities in connection with corporate
restructures and reorganizations, mergers and acquisitions, private placements
and other corporate purposes. Prior to this engagement, American Appraisal had
not provided financial or valuation advice to TGX or to Sheridan.     
 
In connection with our analysis leading to the opinions set forth below, we
have, among other things:
 
  (i)   Reviewed and analyzed historical operating and financial information
        of TGX from (1) Forms 10-K and 10-KSB for TGX for the years ended
        December 31, 1996 through 1991, (2) unaudited financial statements for
        period ended January 31, 1997, (3) Amendment No. 2 to Form S-4
        Registration Statement filed January 6, 1997 with the SEC, and (4)
        certain other publicly available financial and operating information
        relating to TGX;
 
  (ii)  Reviewed and analyzed the historical trading volume and market prices
        of TGX's publicly traded Common Stock, and a private transaction
        relating to the Senior Preferred Stock;
 
  (iii) Reviewed and analyzed internal operating and financial information
        of TGX including near term operating forecasts and financial
        projections prepared by TGX management;
 
                                      D-1
<PAGE>
 
  (iv)  Reviewed market capitalizations, price to earnings ratios and other
        valuation measurements of publicly held companies, whose lines of
        business were comparable to those of TGX;
     
  (v)   Held discussions with TGX senior management regarding (1) TGX's
        operating history, financial condition, business outlook and business
        strategy prior to the Merger and after the Merger as part of
        Sheridan's consolidated company, (2) TGX's need to raise capital in
        order to achieve its long term business goals, (3) TGX's need to
        recapitalize and eliminate the Senior Preferred redemption liability
        in order to raise capital, and (4) the financial benefits of the
        Merger to Senior Preferred Stock shareholders including the enhanced
        liquidity gained from the ownership of New Common Stock;     
 
  (vi)  Independently valued the Senior Preferred Stock and Common Stock on a
        going concern basis and in liquidation; and
 
  (vii) Performed other financial studies, analyses and investigations and
        other factors as we deemed necessary or appropriate for purposes of
        the opinion expressed herein.
 
Based on the foregoing, we reached the following conclusions with respect to
the financial and valuation analysis of the Merger:
 
  (i)   Removal of the Senior Preferred Stock redemption liability will ensure
        the Company's ability to achieve near and long term growth and other
        business goals;
 
  (ii)  The redemption value of the Senior Preferred Stock is no greater than
        the net asset value of the Company, an amount that is currently
        substantially below the amount of the redemption liability and is not
        expected to materially change over the long term;
 
  (iii) The senior preference position of the Senior Preferred Stock will,
        to a large extent, be matched by the New Common Stock after the
        Merger
 
  (iv)  The Old Preferred and the Common Stock each has no current market
        value because of the senior position of the redemption liability and
        is not expected to have any market value over the long term
 
  (v)   The New Common Stock will provide greater liquidity to the holders of
        the Senior Preferred Stock;
 
We have relied without independent verification upon the accuracy and
completeness of all of the financial and other information reviewed by us for
purposes of this opinion. With respect to the financial forecasts and
projections of TGX we examined, we have assumed that they have been reasonably
prepared on bases reflecting the best currently available estimates and
judgments of TGX management.
 
We were not authorized by the TGX's Board of Directors to solicit, nor have we
solicited, other potential merger candidates for TGX. We are not expressing
any opinion as to the consideration to be received by holders of TGX
securities who exercise their rights of an appraisal or as to the prices at
which the New Common Stock may trade in the public or other market following
the Merger. Our opinion is necessarily based on market, economic and other
conditions as they existed on, and can be evaluated as of, the date of this
letter.
 
Based upon, and subject to, the foregoing, it is our opinion that, as of the
date hereof, (i) the terms of the proposed Merger are fair, from a financial
point of view, to the stockholders of TGX.
 
Very truly yours,
 
AMERICAN APPRAISAL ASSOCIATES, INC.
 
                                      D-2
<PAGE>
 
                                 APPENDIX "E"
 
                   DELAWARE GENERAL CORPORATION LAW--(S) 262
 
  APPRAISAL RIGHTS.--(a) Any stockholder of a corporation of this State who
holds shares of stock on the date of the making of a demand pursuant to
subsection (d) of this section with respect to such shares, who continuously
holds such shares through the effective date of the merger or consolidation,
who has otherwise complied with subsection (d) of this section and who has
neither voted in favor of the merger or consolidation nor consented thereto in
writing pursuant to (S) 228 of this title shall be entitled to an appraisal by
the Court of Chancery of the fair value of his shares of stock under the
circumstances described in subsections (b) and (c) of this section. As used in
this section, the word "stockholder" means a holder of record of stock in a
stock corporation and also a member of record of a nonstock corporation; the
words "stock" and "share" mean and include what is ordinarily meant by those
words and also membership or membership interest of a member of a nonstock
corporation; and the words "depository receipt" mean a receipt or other
instrument issued by a depository representing an interest in one or more
shares, or fractions thereof, solely of stock of a corporation, which stock is
deposited with the depository.
 
  (b) Appraisal rights shall be available for the shares of any class or
series of stock of a constituent corporation in a merger or consolidation to
be effected pursuant to (S) 251, 252, 254, 257, 258, 263 or 264 of this title:
 
    (1) Provided, however, that no appraisal rights under this section shall
  be available for the shares of any class or series of stock, which stock,
  or depository receipts in respect thereof, at the record date fixed to
  determine the stockholders entitled to receive notice of and to vote at the
  meeting of stockholders to act upon the agreement of merger or
  consolidation, were either (i) listed on a national securities exchange or
  designated as a national market system security on an interdealer quotation
  system by the National Association of Securities Dealers, Inc. or (ii) held
  of record by more than 2,000 holders; and further provided that no
  appraisal rights shall be available for any shares of stock of the
  constituent corporation surviving a corporation as provided in subsections
  (f) or (g) of (S) 251 of this title.
 
    (2) Notwithstanding paragraph (1) of this subsection, appraisal rights
  under this section shall be available for the shares of any class or series
  of stock of a constituent corporation if the holders thereof are required
  by the terms of an agreement of merger or consolidation pursuant to
  (S)(S) 251, 252, 254, 257, 258, 263 and 264 of this title to accept for
  such stock anything except:
 
      a. Shares of stock of the corporation surviving or resulting from
    such merger or consolidation, or depository receipts in respect
    thereof;
 
      b. Shares of stock of any other corporation, or depository receipts
    in respect thereof, which shares of stock or depository receipts at the
    effective date of the merger or consolidation will be either listed on
    a national securities exchange or designated as a national market
    system security on an interdealer quotation system by the National
    Association of Securities Dealers, Inc. or held or record by more than
    2,000 holders;
 
      c. Cash in lieu of fractional shares or fractional depository
    receipts described in the foregoing subparagraphs a. and b. of this
    paragraph; or
 
      d. Any combination of the shares of stock, depository receipts and
    cash in lieu of fractional shares or fractional depository receipts
    described in the foregoing subparagraphs a. b. and c. of this
    paragraph.
 
    (3) In the event all of the stock of a subsidiary Delaware corporation
  party to a merger effected under (S) 253 of this title is not owned by the
  parent corporation immediately prior to the merger, appraisal rights shall
  be available for the shares of the subsidiary Delaware corporation.
 
  (c) Any corporation may provide in its certificate of incorporation that
appraisal rights under this section shall be available for the shares of any
class or series of its stock as a result of an amendment to its certificate of
incorporation, any merger or consolidation in which the corporation is a
constituent corporation or the sale of all
 
                                      E-1
<PAGE>
 
or substantially all of the assets of the corporation. If the certificate of
incorporation contains such a provision, the procedures of this section,
including those set forth in subsection (d) and (e) of this section, shall
apply as nearly as is practicable.
 
  (d) Appraisal rights shall be perfected as follows:
 
    (1) If a proposed merger or consolidation for which appraisal rights are
  provided under this section is to be submitted for approval at a meeting of
  stockholders, the corporation, not less than 20 days prior to the meeting,
  shall notify each of its stockholders who was such on the record date for
  such meeting with respect to shares for which appraisal rights are
  available pursuant to subsections (b) or (c) hereof that appraisal rights
  are available for any or all of the shares of the constituent corporations,
  and shall include in such notice a copy of this section. Each stockholder
  electing to demand the appraisal of his shares shall deliver to the
  corporation, before the taking of the vote on the merger or consolidation,
  a written demand for appraisal of his shares. Such demand will be
  sufficient if it reasonably informs the corporation of the identity of the
  stockholder and that the stockholder intends thereby to demand the
  appraisal of his shares. A proxy or vote against the merger or
  consolidation shall not constitute such a demand. A stockholder electing to
  take such action must do so by a separate written demand as herein
  provided. Within 10 days after the effective date of such merger or
  consolidation, the surviving or resulting corporation shall notify each
  stockholder of each constituent corporation who has complied with this
  subsection and has not voted in favor of or consented to the merger or
  consolidation of the date that the merger or consolidation has become
  effective; or
 
    (2) If the merger or consolidation was approved pursuant to (S) 228 or
  (S) 253 of this title, the surviving or resulting corporation, either
  before the effective date of the merger or consolidation or within 10 days
  thereafter, shall notify each of the stockholders entitled to appraisal
  rights of the effective date of the merger or consolidation and that
  appraisal rights are available for any or all of the shares of the
  constituent corporation, and shall include in such notice a copy of this
  section. The notice shall be sent by certified or registered mail, return
  receipt requested, addressed to the stockholder at his address as it
  appears on the records of the corporation. Any stockholder entitled to
  appraisal rights may, within 20 days after the date of mailing of the
  notice, demand in writing from the surviving or resulting corporation the
  appraisal of his shares. Such demand will be sufficient if it reasonably
  informs the corporation of the identity of the stockholder and that the
  stockholder intends thereby to demand the appraisal of his shares.
 
  (e) Within 120 days after the effective date of the merger or consolidation,
the surviving or resulting corporation or any stockholder who has complied
with subsections (a) and (d) hereof and who is otherwise entitled to appraisal
rights, may file a petition in the Court of Chancery demanding a determination
of the value of the stock of all such stockholders. Notwithstanding the
foregoing, at any time within 60 days after the effective date of the merger
or consolidation, any stockholder shall have the right to withdraw his demand
for appraisal and to accept the terms offered upon the merger or
consolidation. Within 120 days after the effective date of the merger or
consolidation, any stockholder who has complied with the requirements of
subsections (a) and (d) hereof, upon written request, shall be entitled to
receive from the corporation surviving the merger or resulting from the
consolidation a statement setting forth the aggregate number of shares not
voted in favor of the merger or consolidation and with respect to which
demands for appraisal have been received and the aggregate number of holders
of such shares. Such written statement shall be mailed to the stockholder
within 10 days after his written request for such a statement is received by
the surviving or resulting corporation or within 10 days after expiration of
the period for delivery of demands for appraisal under subsection (d) hereof,
whichever is later.
 
  (f) Upon the filing of any such petition by a stockholder, service of a copy
thereof shall be made upon the surviving or resulting corporation, which shall
within 20 days after such service file in the office of the Register in
Chancery in which the petition was filed a duly verified list containing the
names and addresses of all stockholders who have demanded payment for their
shares and with whom agreements as to the value of their shares have not been
reached by the surviving or resulting corporation. If the petition shall be
filed by the surviving or resulting corporation, the petition shall be
accompanied by such a duly verified list. The Register in
 
                                      E-2
<PAGE>
 
Chancery, if so ordered by the Court, shall give notice of the time and place
fixed for the hearing of such petition by registered or certified mail to the
surviving or resulting corporation and to the stockholders shown on the list
at the addresses therein stated. Such notice shall also be given by 1 or more
publications at least 1 week before the day of the hearing, in a newspaper of
general circulation published in the City of Wilmington, Delaware or such
publications as the Court deems advisable. The forms of the notices by mail
and by publication shall be approved by the Court, and the costs thereof shall
be borne by the surviving or resulting corporation.
 
  (g) At the hearing on such petition, the Court shall determine the
stockholders who have complied with this section and who have become entitled
to appraisal rights. The Court may require the stockholders who have demanded
an appraisal for their shares and who hold stock represented by certificates
to submit their certificates of stock to the Register in Chancery for notation
thereon of the pendency of the appraisal proceedings; and if any stockholder
fails to comply with such direction, the Court may dismiss the proceedings as
to such stockholder.
 
  (h) After determining the stockholders entitled to an appraisal, the Court
shall appraise the shares, determining their fair value exclusive of any
element of value arising from the accomplishment or expectation of the merger
or consolidation, together with a fair rate of interest, if any, to be paid
upon the amount determined to be the fair value. In determining such fair
value, the Court shall take into account all relevant factors. In determining
the fair rate of interest, the Court may consider all relevant factors. In
determining the rate of interest which the surviving or resulting corporation
would have had to pay to borrow money during the pendency of the proceeding.
Upon application by the surviving or resulting corporation or by any
stockholder entitled to participate in the appraisal proceeding, the Court
may, in its discretion, permit discovery or other pretrial proceedings and may
proceed to trial upon the appraisal prior to the final determination of the
stockholder entitled to an appraisal. Any stockholder whose name appears on
the list filed by the surviving or resulting corporation pursuant to
subsection (f) of this section and who has submitted his certificates of stock
to the Register in Chancery, if such is required, may participate fully in all
proceedings until it is finally determined that he is not entitled to
appraisal rights under this section.
 
  (i) The Court shall direct the payment of the fair value of the shares,
together with interest, if any, by the surviving or resulting corporation to
the stockholders entitled thereto. Interest may be simple or compound, as the
Court may direct. Payment shall be so made to each such stockholder, in the
case of holders of uncertificated stock forthwith, and the case of holders of
shares represented by certificates upon the surrender to the corporation of
the certificates representing such stock. The Court's decree may be enforced
as other decrees in the Court of Chancery may be enforced, whether such
surviving or resulting corporation be a corporation of this State or of any
state.
 
  (j) The costs of the proceeding may be determined by the Court and taxed
upon the parties as the Court deems equitable in the circumstances. Upon
application of a stockholder, the Court may order all or a portion of the
expenses incurred by any stockholder in connection with the appraisal
proceeding, including, without limitation, reasonable attorney's fees and the
fees and expenses of experts, to be charged pro rata against the value of all
the shares entitled to an appraisal.
 
  (k) From and after the effective date of the merger or consolidation, no
stockholder who has demanded his appraisal rights as provided in subsection
(d) of this section shall be entitled to vote such stock for any purpose or to
receive payment of dividends or other distributions on the stock (except
dividends or other distributions payable to stockholders of record at a date
which is prior to the effective date of the merger or consolidation);
provided, however, that if no petition for an appraisal shall be filed within
the time provided in subsection (e) of this section, or if such stockholder
shall deliver to the surviving or resulting corporation a written withdrawal
of his demand for an appraisal and an acceptance of the merger or
consolidation, either within 60 days after the effective date of the merger or
consolidation as provided in subsection (e) of this section or thereafter with
the written approval of the corporation, then the right of such stockholder to
an appraisal shall cease.
 
                                      E-3
<PAGE>
 
Notwithstanding the foregoing, no appraisal proceeding in the Court of
Chancery shall be dismissed as to any stockholder without the approval of the
Court, and such approval may be conditioned upon such terms as the Court deems
just.
 
  (1) The shares of the surving or resulting corporation to which the shares
of such objecting stockholders would have been converted had they assented to
the merger or consolidation shall have the status of authorized and unissued
shares of the surviving or resulting corporation.
 
                                      E-4
<PAGE>
 
                                 APPENDIX "F"
                             
                          SHERIDAN ENERGY, INC.     
                         1997 FLEXIBLE INCENTIVE PLAN
 
1. PURPOSE OF THE PLAN
   
  The purposes of the Sheridan Energy, Inc. 1997 Flexible Incentive Plan (the
"Plan") are to promote the interests of Sheridan Energy, Inc. (together with
any successor thereto, the "Company") and its Shareholders by enabling the
Company to (i) attract, motivate and retain key employees and consultants by
offering such key employees and consultants performance-based stock incentives
and other equity interests in the Company and other incentive awards that
recognize the creation of value for the Shareholders of the Company and
promote the Company's long-term growth and success, and (ii) award and retain
highly qualified independent directors and allow them to develop a sense of
proprietorship and personal involvement in the development and financial
success of the Company. To achieve these purposes, eligible persons may
receive stock options, Stock Appreciation Rights, Restricted Stock,
Performance Awards, performance stock, Dividend Equivalent Rights and any
other Awards, or any combination thereof.     
 
2. DEFINITIONS
 
  As used in the Plan, the following terms shall have the meanings set forth
below unless the content otherwise requires:
 
  2.1 "Award" shall mean the grant of a stock option, a Stock Appreciation
Right, a Restricted Stock, a Performance Award, performance stock, a Dividend
Equivalent Right or any other award under the Plan.
 
  2.2 "Board" shall mean the Board of Directors of the Company, as the same
may be constituted from time to time.
 
  2.3 "Change in Control" shall mean, after the effective date of the Plan,
(i) the occurrence of an event of a nature that would be required to be
reported in response to Item 1 or Item 2 of a Form 8-K Current Report of the
Company promulgated pursuant to Sections 13 and 15(d) of the Exchange Act;
provided that, without limitation, such a Change in Control shall be deemed to
have occurred if (a) any "person", as such term is used in Sections 13(d) and
14(d) of the Exchange Act (other than the Company, any trustee or other
fiduciary holding securities under any employee benefit plan of the Company,
or any company owned, directly or indirectly, by the Shareholders of the
Company in substantially the same proportions as their ownership of stock of
the Company), is or becomes the "beneficial owner" (as defined in Rule 13d-3
under the Exchange Act), directly or indirectly, of securities of the Company
representing twenty-five percent (25%) or more of the combined voting power of
the Company's then outstanding securities or (b) during any period of two
consecutive years, individuals who at the beginning of such period constitute
the Board cease for any reason to constitute at least a majority thereof,
unless the election by the Board or the nomination for election by the
Company's Shareholders was approved by a vote of at least two-thirds (2/3) of
the directors then still in office who either were directors at the beginning
of the two-year period or whose election or nomination for election was
previously so approved; (ii) the Shareholders of the Company approve a merger
or consolidation of the Company with any other corporation, other than a
merger or consolidation that would result in the voting securities of the
Company outstanding immediately prior thereto continuing to represent (either
by remaining outstanding or by being converted into voting securities of the
surviving entity) more than eighty percent (80%) of the combined voting power
of the voting securities of the surviving entity outstanding immediately after
such merger or consolidation; provided, however, that a merger or
consolidation effected to implement a reorganization or recapitalization of
the Company, or a similar transaction (collectively, a "Reorganization"), in
which no "person" acquires more than twenty percent (20%) of the combined
voting power of the Company's then outstanding securities shall not constitute
a Change in Control of the Company; or (iii) the Shareholders of the Company
approve a plan of complete liquidation of the Company or an agreement for the
sale or disposition by the Company of all or substantially all of the
Company's assets.
 
                                     FF-1
<PAGE>
 
  2.4 "Code" shall mean the Internal Revenue Code of 1986, as amended from
time to time.
 
  2.5 "Committee" shall mean the Stock Option and Compensation Committee, if
such a separate committee is appointed by the Board, or, until such time as a
separate committee is appointed, it shall mean the Board. If a separate
committee is appointed, the Committee be "non-employee directors" (as such
term is defined under Rule 16b-3 promulgated under the Exchange Act and any
successor thereunder promulgated during the duration of the Plan). The Board
may amend the Plan to modify the definition of Committee within the limits of
Rule 16b-3 to assure that the Plan is administered in compliance with Rule
16b-3. Initially, the Committee will consist of not less than two (2) members
of the Board who are appointed by, and serve at the pleasure of, the Board and
who are (i) "non-employee directors" within the meaning of Rule 16b-3 and (ii)
"outside directors," as required under Section 162(m) of the Code and such
Treasury Regulations as may be promulgated thereunder. The Board does not meet
the applicable requirements of Rule 16b-3.
 
  2.6 "Common Stock" shall mean the Common Stock, $.01 par value per share, of
the Company.
 
  2.7 "Designated Beneficiary" shall mean the beneficiary designated by a
Participant in a manner determined by the Committee, to exercise rights of the
Participant in the event of the Participant's death. In the absence of an
effective designation by a Participant the Designated Beneficiary shall be the
Participant's estate.
 
  2.8 "Disability" shall mean permanent and total inability to engage in any
substantial gainful activity by reason of any medically determinable physical
or mental impairment which can be expected to result in death or which has
lasted or can be expected to last for a continuous period of not less than
twelve (12) months, as determined in the sole and absolute discretion of the
Committee.
 
  2.9 "Dividend Equivalent Right" shall mean the right of the holder thereof
to receive credits based on the cash dividends that would have been paid on
the Shares specified in an Award granting Dividend Equivalent Rights if the
Shares subject to such Award were held by the person to whom the Award is
made.
 
  2.10 "Exchange Act" shall mean the Securities Exchange Act of 1934, as
amended from time to time.
 
  2.11 "Fair Market Value" shall mean with respect to the Shares, as of any
date, (i) the last reported sales price on any stock exchange on which the
Common Stock is traded or, if not reported on such exchange, on the composite
tape, or, in case no such sale takes place on such day, the average of the
reported closing bid and asked quotations on such exchange; (ii) if the Common
Stock is not listed on a stock exchange or no such quotations are available,
the closing price of the Common Stock as reported by the National Market
System or Small Cap Market System of the National Association of Securities
Dealers, Inc., or, if no such quotations are available, the average of the
high bid and low asked quotations in the over-the-counter market as reported
by the National Quotation Bureau Incorporated, or similar organization; or
(iii) in the event that there shall be no public market for the Common Stock,
the fair market value of the Common Stock as determined (which determination
shall be conclusive) in good faith by the Committee, based upon the value of
the Company as a going concern, as if such Common Stock were publicly owned
stock, but without any discount with respect to minority ownership.
 
  2.12 "Incentive Stock Option" shall mean any stock option awarded under the
Plan which qualifies as an "Incentive Stock Option" under Section 422 of the
Code or any successor provision.
 
  2.13 "Non-Tandem Stock Appreciation Right" shall mean any Stock Appreciation
Right granted alone and not in connection with an Award which is a stock
option.
 
  2.14 "Non-Qualified Stock Option" shall mean any stock option awarded under
the Plan that does not qualify as an Incentive Stock Option.
 
  2.15 "Optionee" shall mean any person who has been granted a stock option
under the Plan and who has executed a written stock option agreement with the
Company reflecting the terms of such grant.
 
                                     FF-2
<PAGE>
 
  2.16 "Performance Award" shall mean any Award hereunder of Shares, units or
rights based upon, payable in, or otherwise related to, Shares (including
Restricted Stock), or cash of an equivalent value, as die Committee may
determine, at the end of a specified performance period established by the
Committee.
   
  2.17 "Plan" shall mean the Sheridan Energy, Inc. 1997 Flexible Incentive
Plan set forth herein.     
 
  2.18 "Reload Option" shall mean a stock option as deemed in subsection
6.6(b) herein.
 
  2.19 "Restricted Stock" shall mean any Award of Shares under the Plan that
are subject to restrictions or risk of forfeiture.
 
  2.20 "Retirement" shall mean termination of employment other than discharge
for cause, after age 65 or on or before age 65 if pursuant to the terms of any
retirement plan maintained by the Company or any of its Subsidiaries in which
such person participates.
 
  2.21 "Shares" shall mean shares of the Company's Common Stock and any shares
of capital stock or other securities of the Company hereafter issued or
issuable upon, in respect of or in substitution or exchange for such Shares.
 
  2.22 "Stock Appreciation Right" shall mean the right of the holder thereof
to receive an amount in cash or Shares equal to the excess of the Fair Market
Value of a Share on the date of exercise over the Fair Market Value of a Share
on the date of the grant (or such other value as may be specified in the
agreement granting the Stock Appreciation Right).
 
  2.23 "Subsidiary" shall mean a subsidiary corporation of the Company, as
defined in Section 424(f) of the Code.
 
  2.24 "Tandem Stock Appreciation Right" shall mean a Stock Appreciation Right
granted in connection with an Award which is a stock option.
 
3. ADMINISTRATION OF THE PLAN
 
  3.1 Committee. The Plan shall be administered and interpreted by the
Committee.
 
  3.2 Awards. Subject to the provisions of the Plan and directions from the
Board, the Committee is authorized to:
 
    (a) determine the persons to whom Awards are to be granted;
 
    (b) determine the types and combinations of Awards to be granted, the
  number of Shares to be covered by the Award, the pricing of the Award, the
  time or times when the Award shall be granted and may be exercised, the
  terms, performance criteria or other conditions, vesting periods or any
  restrictions for an Award, any restrictions on Shares acquired pursuant to
  the exercise of an Award and any other terms and conditions of an Award;
 
    (c) conclusively interpret the provisions of the Plan;
 
    (d) prescribe, amend and rescind rules and regulations relating to the
  Plan or make individual decisions as questions arise, or both;
 
    (e) determine whether, to what extent and under what circumstances to
  provide loans from the Company to participants to purchase Shares subject
  to Awards under the Plan, and the terms and conditions of such loans;
 
    (f) rely upon employees of the Company for such clerical and
  recordkeeping duties as may be necessary in connection with the
  administration of the Plan; and
 
    (g) make all other determinations and take all other actions necessary or
  advisable for the administration of the Plan.
 
                                     FF-3
<PAGE>
 
  3.3 Procedures. A majority of the Committee members shall constitute a
quorum. All determinations of the Committee shall be made by a majority of its
members. All questions of interpretation and application of the Plan or
pertaining to any question of fact or Award granted hereunder shall be decided
by the Committee, whose decision shall be final, conclusive and binding upon
the Company and each other affected party.
 
4. SHARES SUBJECT TO PLAN
 
  4.1 Limitations. The maximum number of Shares that may be issued with
respect to Awards under the Plan shall not exceed 450,000 unless such maximum
shall be increased or decreased by reason of changes in capitalization of the
Company as hereinafter provided. The Shares issued pursuant to the Plan may be
authorized but unissued Shares, or may be issued Shares which have been
reacquired by the Company.
 
  4.2 Changes. To the extent that any Award under the Plan, or any stock
option or performance award granted under any prior incentive plan of the
Company, shall be forfeited, shall expire or shall be cancelled, in whole or
in part then the number of Shares covered by the Award or stock option so
forfeited, expired or cancelled may again be awarded pursuant to the
provisions of the Plan. In the event that Shares are delivered to the Company
in full or partial payment of the exercise price for the exercise of a stock
option granted under the Plan or any prior incentive plan of the Company, the
number of Shares available for future Awards under the Plan shall be reduced
only by the net number of Shares issued upon the exercise of the option.
Awards that may be satisfied either by the issuance of Shares or by cash or
other consideration shall, until the form of consideration to be paid is
finally determined, be counted against the maximum number of Shares that may
be issued under the Plan. If the Award is ultimately satisfied by the payment
of consideration other than Shares, as, for example, a stock option granted in
tandem with a Stock Appreciation Right that is settled by a cash payment of
the stock appreciation, such Shares may again be made the subject of an Award
under the Plan. Awards will not reduce the number of Shares that may be issued
pursuant to the Plan if the settlement of the Award will not require the
issuance of Shares, as, for example, a Stock Appreciation Right that can be
satisfied only by the payment of cash.
 
5. ELIGIBILITY
 
  Eligibility for participation in the Plan shall be confined to key
employees, officers and directors of the Company, and consultants providing
services to the Company; provided, however, that Incentive Stock Options may
be granted only to employees of the Company. In making any determination as to
persons to whom Awards shall be granted, the type of Award, and/or the number
of Shares to be covered by the Award, the Committee shall consider the
position and responsibilities of the person, his or her importance to the
Company, the duties of such person, his or her past, present and potential
contributions to the growth and success of the Company, and such other factors
as the Committee shall deem relevant in connection with accomplishing the
purposes of the Plan.
 
6. STOCK OPTIONS
 
  6.1 Grants. The Committee may grant stock options alone or in addition to
other Awards granted under the Plan to any eligible officer, director or other
key employee. Each person so selected shall be offered an option to purchase
the number of Shares determined by the Committee. The Committee shall specify
whether such option is an Incentive Stock Option or Non-Qualified Stock Option
and any other terms and conditions relating to such Award. To the extent that
any stock option does not qualify as an Incentive Stock Option (whether
because of its provisions or the time or manner of its exercise or otherwise),
such stock option or the portion thereof which does not qualify shall
constitute a separate Non-Qualified Stock Option. Each such person so selected
shall have a reasonable period of time within which to accept or reject the
offered option. Failure to accept within the period so fixed by the Committee
may be treated as a rejection. Each person who accepts an option shall enter
into a written agreement with the Company, in such form as the Committee may
prescribe, setting forth the terms and conditions of the option, consistent
with the provisions of the Plan. The Optionee and the Company shall enter
 
                                     FF-4
<PAGE>
 
into option agreements for Incentive Stock Options and Non-Qualified Stock
Options. At any time and from time to time, the Optionee and the Company may
agree to modify an option agreement so that an incentive Stock Option may be
converted to a Non-Qualified Stock Option.
 
  The Committee may require that an Optionee meet certain conditions before
the option or a portion thereof may vest or be exercised, as, for example,
that the Optionee remain in the employ of the Company for a stated period or
periods of time before the option, or stated portions thereof, may vest or be
exercised.
 
  6.2 Option Price. The option exercise price of the Shares covered by each
stock option shall be determined by the Committee; provided, however, that the
option exercise price of an Incentive Stock Option shall not be less than one
hundred percent (100%) of the Fair Market Value of Shares on the date of the
grant of such Incentive Stock Option.
 
  6.3 Incentive Stock Options Limitations.
 
  (a) In no event shall any person be granted Incentive Stock Options to the
extent that the Shares covered by any Incentive Stock Options (and any
incentive stock options granted under any other plans of the Company and its
Subsidiaries) that may be exercised for the first time by such person in any
calendar year have an aggregate Fair Market Value in excess of $100,000. For
this purpose, the Fair Market Value of the Shares shall be determined as of
the dates on which the Incentive Stock Options are granted. It is intended
that the limitation on Incentive Stock Options provided in this subsection
6.3(a) be the maximum limitation on options which may be considered Incentive
Stock Options under the Code.
 
  (b) Notwithstanding anything herein to the contrary, in no event shall any
employee owning more than ten percent (10%) of the total combined voting power
of the Company or any Subsidiary be granted an Incentive Stock Option
hereunder unless the option exercise price shall be at least one hundred ten
percent (110%) of the Fair Market Value of the Shares subject to such
Incentive Stock Option at the time that the Incentive Stock Option is granted
and the term of such Incentive Stock Option shall not exceed five (5) years.
 
  6.4 Option Term. Subject to subsection 6.3(b) hereof, the term of a stock
option shall be for such period of months or years from the date of its grant
as may be determined by the Committee; provided, however, that no Incentive
Stock Option shall be excisable later than ten (10) years from the date of its
grant. Furthermore, no Incentive Stock Option may be exercised unless, at the
time of such exercise, the Optionee is, and has been continuously since the
date of grant of his or her Incentive Stock Option, employed by the Company,
except that:
 
    (a) An Incentive Stock Option may, to the extent vested, be exercised
  within the period of three months after the date the Participant ceases to
  be an employee of the Company (or within such lesser period as may be
  specified in the applicable option agreement), provided that the option
  agreement may designate a longer exercise period and that the exercise
  after such three-month period shall be treated as the exercise of a Non-
  Qualified Stock Option under the Plan;
 
    (b) If the Optionee dies while in the employ of the Company, or within
  three months after the Optionee ceases to be such an employee, the
  Incentive Stock Option may, to the extent vested, be exercised by the
  Optionee's Designated Beneficiary within the period of one year after the
  date of death (or within such lesser period as may be specified in the
  applicable option agreement); and
 
    (c) If the Optionee ceases to be an employee of the Company by reason of
  the Optionee's Disability, the Incentive Stock Option may be exercised
  within the period of one year after the date of Disability (or within such
  lesser period as maybe specified in the applicable option agreement).
 
  6.5 Vesting of Stock Options.
 
  (a) Each stock option granted hereunder may only be exercised to the extent
that the Optionee is vested in such option. Each stock option shall vest
separately in accordance with the option vesting schedule, if any, determined
by the Committee in its sole discretion, which will be incorporated in the
stock option agreement
 
                                     FF-5
<PAGE>
 
entered into between the Company and each Optionee. The option vesting
schedule will be accelerated if, in the sole discretion of the Committee, the
Committee determines that acceleration of the option vesting schedule would be
desirable for the Company.
 
  (b) In the event of the dissolution or liquidation of the Company, each
stock option granted under the Plan shall terminate as of a date to be fixed
by the Board; provided, however, that not less than thirty (30) days' written
notice of the date so fixed shall be given to each Optionee and each such
Optionee shall be fully vested in and shall have the right during such period
to exercise the option, even though such option would not otherwise be
exercisable under the option vesting schedule. At the end of such period, any
unexercised option shall terminate and be of no other effect.
 
  (c) In the event of a Reorganization (as defined in Section 2.3 hereof):
 
    (1) If there is no plan or agreement respecting the Reorganization, or if
  such plan or agreement does not specifically provide for the change,
  conversion or exchange of the Shares under outstanding and unexercised
  stock options for other securities thin the provisions of subsection 6.5(b)
  shall apply as if the Company had dissolved or been liquidated on the
  effective date of the Reorganization; or
 
    (2) If there is a plan or agreement respecting the Reorganization, and if
  such plan or agreement specifically provides for the change, conversion or
  exchange of the Shares under outstanding and unexercised stock options for
  securities of another corporation, then the Board shall adjust the Shares
  under such outstanding and unexercised stock options (and shall adjust the
  Shares remaining under the Plan which are then available to be awarded
  under the Plan, if such plan or agreement makes no specific provision
  therefor) in a manner not inconsistent with the provisions of such plan or
  agreement for the adjustment change, conversion or exchange of such Shares
  and such options.
 
    (3) In the event of a Change in Control of the Company, all stock options
  and any associated Stock Appreciation Rights shall become fully vested and
  immediately exercisable and the vesting of all performance-based stock
  options shall be determined as if the performance period or cycle
  applicable to such stock options had ended immediately upon such Change in
  Control; provided, however, that if in the opinion of counsel to the
  Company the immediate exercisability of options when taken into
  consideration with all other "parachute payments" as defined in Section
  280G of the Code, as amended, would result in an "excess parachute payment"
  as defined in such section as well as an exercise tax imposed by Section
  4999 of the Code, such options and any associated Stock Appreciation Rights
  shall become fully vested and immediately exercisable, except as and to the
  extent the Committee, in its sole discretion, shall otherwise determine,
  and which determination by the Committee shall be based solely upon
  maximizing the after-tax benefits to be received by any such Optionee.
 
  6.6 Exercise of Stock Options.
 
  (a) Stock options may be exercised as to Shares only in amounts and at
intervals of time specified in the written option agreement between the
Company and the Optionee. Each exercise of a stock option, or any part
thereof, shall be evidenced by a notice in writing to the Company. The
purchase price of the Shares as to which an option shall be exercised shall be
paid in full at the time of exercise, and may be paid to the Company either:
 
    (1) in cash (including check, bank draft or money order); or
 
    (2) by the delivery of Shares (whether previously owned or underlying the
  option being exercised) having a Fair Market Value equal to the aggregate
  option rate;
 
    (3) by a combination of cash and Shares; or
 
    (4) by other consideration deemed acceptable by the Committee in its sole
  discretion.
 
  (b) If an Optionee delivers Shares (including Shares of Restricted Stock)
already owned by him or her in full or partial payment of the exercise price
for any stock option granted under the Plan or any prior incentive plan of the
Company, or if the Optionee elects to have the Company reflect that number of
Shares out of the
 
                                     FF-6
<PAGE>
 
Shares being acquired through the exercise of the option having a Fair Market
Value equal to the exercise price of the stock option being exercised, the
Committee may authorize the automatic grant of a new option (a "Reload
Option") for that number of Shares as shall equal the number of already owned
Shares surrendered (including Shares of Restricted Stock) or newly acquired
Shares being retained in payment of the option exercise price of the
underlying stock option being exercised. The grant of a Reload Option will
become effective upon the exercise of the underlying stock option. The option
exercise price of the Reload Option shall be the Fair Market Value of a Share
on the effective date of the grant of the Reload Option. Each Reload Option
shall be exercisable no earlier than six (6) months from the date of its grant
and no later than the time when the underlying stock option being exercised
could be last exercised. The Committee may also specify additional terms,
conditions and restrictions for the Reload Option and the Shares to be
acquired upon the exercise thereof.
 
  (c) The amount, as determined by the Committee, of any federal, state or
local tax required to be withheld by the Company due to the exercise of a
stock option shall be satisfied by payment by the Optionee to the Company of
the amount of such withholding obligation in cash or other consideration
acceptable to the Committee in its sole discretion, which payment method shall
be set forth in the agreement approved by the Committee relating to the grant
of the option or shall be otherwise approved by the Committee prior to the
exercise of the option.
 
  (d) An Optionee shall not have any of the rights of a Shareholder of the
Company with respect to the Shares covered by a stock option except to the
extent that one or more certificates representing such Shares shall have been
delivered to the Optionee, or the Optionee has been determined to be a
Shareholder of record by the Company's transfer agent, upon due exercise of
the option.
 
  6.7 Date of a Stock Option Grant. The granting of a stock option shall take
place only upon the execution and delivery by the Company and an optionee of
an option agreement. Neither any action taken by the Board nor anything
contained in the Plan or in any resolution adopted or to be adopted by the
Board or the Shareholders of the Company shall constitute the granting of a
stock option under the Plan.
 
7. STOCK APPRECIATION RIGHTS
 
  7.1 Grants. The Committee may grant to any eligible employee either Non-
Tandem Stock Appreciation Rights or Tandem Stock Appreciation Rights. Stock
Appreciation Rights shall be subject to such terms and conditions as the
Committee shall impose. The grant of the Stock Appreciation Right may provide
that the holder may be paid for the value of the Stock Appreciation Right
either in cash or in Shares, or a combination thereof, at the discretion of
the Committee. In the event of the exercise of a Stock Appreciation Right
payable in Shares, the holder of the Stock Appreciation Right shall receive
that number of whole Shares of stock of the Company having an aggregate Fair
Market Value on the date of exercise equal to the value obtained by
multiplying (i) either (a) in the case of a Tandem Stock Appreciation Right,
the difference between the Fair Market Value of a Share on the date of
exercise over the per share exercise price of the related option, or (b) in
the case of a Non-Tandem Stock Appreciation Right the difference between the
Fair Market Value of a Share on the date of exercise over the Fair Market
Value on the date of the grant by (ii) the number of Shares as to which the
Stock Appreciation Right is exercised. However, notwithstanding the foregoing,
the Committee, in its sole discretion, may place a ceiling on the amount
payable upon exercise of a Stock Appreciation Right but any such limitation
shall be specified at the time that the Stock Appreciation Right is granted.
 
  7.2 Exercisability. A Tandem Stock Appreciation Right may be granted at the
time of the grant of the related stock option or, if the related stock option
is a Non-Qualified Stock Option, at any time thereafter during the term of the
stock option. A Tandem Stock Appreciation Right granted in connection with an
Incentive Stock Option (i) may be exercised at, and only at, the times and to
the extent the related Incentive Plan Stock Option is exercisable, (ii)
expires upon the termination of the related Incentive Stock Option, (iii) may
not exceed 100% of the difference between the exercise price of the related
Incentive Stock Option and the market price of the Shares subject to the
related Incentive Stock Option at the time the Tandem Stock Appreciation Right
is exercised and (iv) may be exercised at, and only at, such times as the
market price of the Shares subject to the related Incentive Stock Option
exceeds the exercise price of the related Incentive Stock Option. The Tandem
Stock Appreciation Right may be transferred at, and only at, the times and to
the extent the related stock option
 
                                     FF-7
<PAGE>
 
is transferable. If a Tandem Stock Appreciation Right is granted, there shall
be surrendered and cancelled from the related option at the time of exercise
of the Tandem Stock Appreciation Right, in lieu of exercise under the related
option, that number of Shares as shall equal the number of Shares as to which
the Tandem Stock Appreciation Right shall have been exercised.
 
  7.3 Certain Limitations on Non-Tandem Stock, Appreciation Rights. A Non-
Tandem Stock Appreciation Right will be exercisable as provided by the
Committee and will have such other terms and conditions as the Committee may
determine, which terms and conditions shall be specified by the Committee
prior to the grant of such right. A Non-Tandem Stock Appreciation Right is
subject to acceleration of vesting or immediate termination in certain
circumstances in the same manner as stock options pursuant to subsections 6.4
and 6.5 of the Plan.
 
  7.4 Limited Stock Appreciation Rights. The Committee is also authorized to
grant "limited stock appreciation rights," either as Tandem Stock Appreciation
Rights or Non-Tandem Stock Appreciation Rights. Limited stock appreciation
rights would become exercisable only upon the occurrence of a Change in
Control or such other event as the Committee may designate at the time of
grant or thereafter.
 
8. RESTRICTED STOCK
 
  8.1 Grants. The Committee may grant Awards of Restricted Stock for no cash
consideration, for such minimum consideration as may be required by applicable
law, or for such other consideration as may be specified by the grant. The
terms and conditions of the Restricted Stock shall be specifically approved by
the Committee and set forth in the grant agreement. The Committee, in its sole
discretion, may specify any particular rights which the person to whom an
Award of Restricted Stock is made shall have in the Restricted Stock during
the restriction period and the restrictions applicable to the particular
Award, the vesting schedule (which may be based on service, performance or
other factors) and rights to acceleration of vesting (including, without
limitation, whether non-vested Shares are forfeited or vested upon termination
of employment). Further, the Committee may award performance-based Restricted
Stock by conditioning the grant, or vesting or such other factors, such as the
release, expiration or lapse of restrictions upon any such Award (including
the acceleration of any such conditions or terms) of such Restricted Stock
upon the attainment of specified performance goals or such other factors as
the Committee may determine. The Committee shall also determine when the
restrictions shall lapse or expire and the conditions, if any, under which the
Restricted Stock will be forfeited or sold back to the Company. Each Award of
Restricted Stock may have different restrictions and conditions. The
Committee, in its discretion, may prospectively change the restriction period
and the restrictions applicable to any particular Award of Restricted Stock.
Unless otherwise set forth in the Plan, Restricted Stock may not be disposed
of by the recipient until the restrictions specified in the Award expire.
 
  8.2 Awards and Certificates. Any Restricted Stock issued hereunder may be
evidenced such manner as the Committee, in its sole discretion, shall deem
appropriate including, without limitation, book-entry registration or issuance
of a stock certificate or certificates. In the event any stock certificate is
issued in respect of Shares of Restricted Stock awarded hereunder, such
certificate shall bear an appropriate legend with respect to the restrictions
applicable to such Award. The Company may retain, at its option, the physical
custody of any stock certificate representing any awards of Restricted Stock
during the restriction period or require that the Restricted Stock be placed
in escrow or trust, along with a stock power endorsed in blank, until all
restrictions are removed or expire.
 
9. PERFORMANCE AWARDS
 
  9.1 Grants. A Performance Award may consist of either or both, as the
Committee may determine, of (i) "Performance Shares" or the right to receive
Shares, Restricted Stock or cash of an equivalent value, or any combination
thereof as the Committee may determine, or (ii) "Performance Units," or the
right to receive a fixed dollar amount payable in cash, Common Stock,
Restricted Stock or any combination thereof, as the Committee may determine.
The Committee may grant Performance Awards to any eligible employee, for no
cash consideration, for such minimum consideration as may be required by
applicable law or for such other
 
                                     FF-8
<PAGE>
 
consideration as may be specified at the time of the grant. The terms and
conditions of Performance Awards shall be specifically approved by the
Committee at or prior to the time of the grant and set forth in the grant
agreement. Such terms and conditions may include provisions establishing the
performance period, the performance criteria to be achieved during a
performance period the criteria used to determine vesting (including the
acceleration thereof), whether Performance Awards are forfeited or vest upon
termination of employment during a performance period and the maximum or
minimum settlement values. Each Performance Award shall have its own terms and
conditions, which shall be determined in the discretion of the Committee. If
the Committee determines, in its sole discretion, that the established
performance measures or objectives are no longer suitable because of a change
in the Company's business, operations, corporate structure or for other
reasons that the Committee deems satisfactory, the Committee may modify the
performance measures or objectives and/or the performance period.
 
  9.2 Terms and Conditions. Performance Awards may be valued by reference to
the Fair Market Value of a Share or according to any formula or method deemed
appropriate by the Committee, in its sole discretion, including, but not
limited to, achievement of specific financial, production, sales, cost or
earnings performance objectives that the Committee believes to be relevant to
the Company's business and for remaining in the employ of the Company for a
specified period of time, or the Company's performance or the performance of
its Common Stock measured against the performance of the market the Company's
industry segment or its direct competitors. Performance Awards may be paid in
cash, Shares (including Restricted Stock) or other consideration, or any
combination thereof. If payable in Shares, the consideration for the issuance
of the Shares may be the achievement of the performance objective established
at the time of the grant of the Performance Award. Performance Awards may be
payable in a single payment or in installments and may be payable at a
specified date or dates or upon attaining the performance objective, all at
the Committee's discretion. The extent to which any applicable performance
objective has been achieved shall be conclusively determined by the Committee.
 
10. DIVIDEND EQUIVALENT RIGHTS
 
  The Committee may grant a Dividend Equivalent Right either as a component of
another Award or as a separate Award, and, in general, each such holder of a
Dividend Equivalent Right that is outstanding on a dividend record date for
the Company's Common Stock shall be credited with an amount equal to the cash
or stock dividends or other distributions that would have been received had
the Shares covered by the Award been issued and outstanding on the dividend
record date. The terms and conditions of the Dividend Equivalent Right shall
be specified by the grant. Dividend equivalents credited to the holder of a
Dividend Equivalent Right may be paid currently or may be deemed to be
reinvested in additional Shares (which may thereafter accrue additional
Dividend Equivalent Rights). Any such reinvestment shall be at the Fair Market
Value at the time thereof. Dividend Equivalent Rights may be settled in cash
or Shares, or a combination thereof, in a single payment or in installments. A
Dividend Equivalent Right granted as a component of another Award may provide
that such Dividend Equivalent Right shall be settled upon exercise, settlement
or payment for or lapse of restrictions on such other Award, and that such
Dividend Equivalent Right shall expire or be forfeited or annulled under the
same conditions as such other Award. A Dividend Equivalent Right granted as a
component of another Award may also contain terms a conditions different from
such other Award.
 
11. OTHER AWARDS
 
  The Committee may grant to any eligible employee other forms of Awards based
upon, payable in or otherwise related to, in whole or in part, Shares if the
Committee, in its sole discretion, determines that such other form of Award is
consistent with the purposes and restrictions of the Plan. The terms and
conditions of such other form of Award shall be specified by the grant
including, but not limited to, the price, if any, and the vesting schedule, if
any. Such Awards may be granted for no cash consideration, for such minimum
consideration as may be required by applicable law or for such other
consideration as may be specified by the grant.
 
12. COMPLIANCE WITH SECURITIES AND OTHER LAWS
 
  In no event shall the Company be required to sell or issue Shares under any
Award if the sale or issuance thereof would constitute a violation of
applicable federal or state securities laws or regulations or a violation of
 
                                     FF-9
<PAGE>
 
any other law or regulation of any governmental or regulatory agency or
authority or any national securities exchange. As a condition to any sale or
issuance of Shares, the Company may place legends on Shares, issue stop
transfer orders and require such agreements or undertakings as the Company may
deem necessary or advisable to assure compliance with any such laws or
regulations, including, if the Company or its counsel deems it appropriate,
representations from the person to whom an Award is granted that he or she is
acquiring the Shares solely for investment and not with a view to distribution
and that no distribution of the Shares will be made unless registered pursuant
to applicable federal and state securities laws, or in the opinion of counsel
of the Company, such registration is unnecessary.
 
13. ADJUSTMENTS UPON CHANGES IN CAPITALIZATION OR REORGANIZATION
 
  The value of an Award in Shares shall be adjusted from time to time as
follows:
 
    (a) Subject to any required action by Shareholders, the number of Shares
  covered by each outstanding Award, and the exercise price, shall be
  proportionately adjusted for any increase or decrease in the number of
  issued Shares of the Company resulting from a subdivision or consolidation
  of Shares or the payment of a stock dividend (but only in Shares) or any
  other increase or decrease in the number of Shares affected without receipt
  of consideration by the Company.
 
    (b) Subject to any required action by Shareholders, if the Company shall
  be the surviving corporation in any Reorganization, merger or
  consolidation, each outstanding Award shall pertain to and apply to the
  securities to which a holder of the number of Shares subject to the Award
  would have been entitled, and if a plan or agreement reflecting any such
  event is in effect that specifically provides for the change, conversion or
  exchange of Shares, then any adjustment to Shares relating to an Award
  hereunder shall not be inconsistent with the terms of any such plan or
  agreement.
 
    (c) In the event of a change in the Shares of the Company as presently
  constituted, which is limited to a change of par value into the same number
  of Shares with a different par value or without par value, the Shares
  resulting from any such change shall be deemed to be the Shares within the
  meaning of the Plan.
 
  To the extent that the foregoing adjustments relate to stock or securities
of the Company, such adjustments shall be made by the Board, whose
determination shall be final, binding and conclusive.
 
  Except as hereinbefore expressly provided in the Plan, any person to whom an
Award is granted shall have no rights by reason of any subdivision or
consolidation of stock of any class or the payment of any stock dividend or
any other increase or decrease in the number of shares of stock of any class
or by reason of any dissolution, liquidation, reorganization, merger or
consolidation or spinoff of assets or stock of another corporation, and any
issue by the Company of shares of stock of any class, or securities
convertible into shares of stock of any class, shall not affect and no
adjustment by reason thereof shall be made with respect to, the number or
exercise price of Shares subject to an Award.
 
  The grant of an Award pursuant to the Plan shall not affect in any way the
right or power of the Company to make adjustments, reclassifications,
Reorganizations or changes of its capital or business structure or to merge or
to consolidate or to dissolve, liquidate or sell or transfer all or any part
of its business or assets.
 
14. AMENDMENT OR TERMINATION OF THE PLAN
 
  14.1 Amendment of the Plan. Notwithstanding anything contained in the Plan
to the contrary, all provisions of the Plan may at any time or from time to
time be modified or amended by the Board; provided, however, that no Award at
any time outstanding under the Plan may be modified, unpaired or cancelled
adversely to the holder of the Award without the consent of such holder; and
provided, further, that the Plan may not be amended without approval by the
holders of a majority of the Shares of the Company represented and voted at a
meeting of the Shareholders (a) to increase the maximum number of Shares
subject to Incentive Stock Options the Plan, (b) to modify the class of
employees eligible to receive Incentive Stock Options or (c) if such approval
is
 
                                     FF-10
<PAGE>
 
otherwise necessary, to comply with Rule 16b-3 promulgated under the Exchange
Act as amended, or to comply with any other applicable laws, regulations or
listing requirements, or to qualify for an exemption or characterization that
is deemed desirable by the Board.
 
  14.2 Termination of the Plan. The Board may suspend or terminate the Plan at
any time, and such suspension or termination may be retroactive or
prospective. However, no Award may be granted on or after the tenth
anniversary of the adoption of the Plan. Termination of the Plan shall not
impair or affect any Award previously granted hereunder and the rights of the
holder of the Award shall remain in effect until the Award has been exercised
in its entirety or has expired or otherwise has been terminated by the terms
of such Award.
 
15. AMENDMENTS AND ADJUSTMENTS TO AWARDS
 
  The Committee may amend, modify or terminate any outstanding Award with the
Participants consent at any time prior to payment or exercise in any manner
not inconsistent with the terms of the Plan, including, without limitation,
(i) to change the date or dates as of which (A) an option becomes exercisable
or (B) a performance-based Award is deemed earned, (ii) to amend the terms of
any outstanding Award to provide an exercise price per share which is higher
or lower than the then current exercise price per share of such outstanding
Award or (iii) to cancel an Award and grant a new Award in substitution
therefor under such different terms and conditions as it determines in its
sole and complete discretion to be appropriate including, but not limited to,
having an exercise price per share which may be higher or lower than the
exercise price per share of the cancelled Award. The Committee is also
authorized to make adjustments in the terms and conditions of, and the
criteria included in, Awards in recognition of unusual or nonrecurring events
(including, without limitation, the events described in Section 13 hereof
affecting the Company, or the financial statements of the Company or any
Affiliate, or of changes in applicable laws, regulations or accounting
principles), whenever the Committee determines that such adjustments are
appropriate in order to prevent reduction or enlargement of the benefits or
potential benefits intended to be made available under the Plan. Any provision
of the Plan or any agreement regarding an Award to the contrary
notwithstanding, the Committee may cause any Award granted to be cancelled in
consideration of a cash payment or alternative Award made to the holder of
such cancelled Award equal in value to the Fair Market Value of such cancelled
Award. The determinations of value under this Section 15 shall be made by the
Committee in its sole discretion.
 
16. GENERAL PROVISIONS
 
  16.1 No Limit on Other Compensation Arrangements. Nothing contained in the
Plan shall prevent the Company from adopting or continuing in effect other
compensation arrangements, and such arrangements may be either generally
applicable or applicable only in specific cases.
 
  16.2 No Right to Employment. Nothing in the Plan or in any Award, nor the
grant of any Award, shall confer upon or be construed as giving any recipient
of an Award any right to remain in the employ of the Company. Further, the
Company may at any time dismiss a participant in the Plan from employment,
free from any liability or any claim under the Plan, unless otherwise
expressly provided in the Plan or in any Award agreement. No employee,
participant or other person shall have any claim to be granted any Award, and
there is no obligation for uniformity or treatment of employees, participants
or holders or beneficiaries of Awards.
 
  16.3 GOVERNING LAW. THE VALIDITY, CONSTRUCTION AND EFFECT OF THE PLAN AND
ANY RULES AND REGULATIONS RELATING TO THE PLAN SHALL BE DETERMINED IN
ACCORDANCE WITH THE LAWS OF THE STATE OF DELAWARE.
 
  16.4 Severability. If any provision of the Plan or any Award is or becomes
or is deemed to be invalid, illegal or unenforceable in any jurisdiction or as
to any person or Award, or would disqualify the Plan or any Award under any
law deemed applicable by the Committee, such provision shall be construed or
deemed amended to conform to applicable laws, or if it cannot be construed or
deemed amended without in the sole determination of
 
                                     FF-11
<PAGE>
 
the Committee, materially altering the intent of the Plan or the Award, such
provision shall be stricken as to such jurisdiction, person or Award and the
remainder of the Plan and any such Award shall remain in full force and
effect.
 
  16.5 No Fractional Shares. No fractional Shares shall be issued or delivered
pursuant to the Plan or any Award, and the Committee shall determine whether
cash, other securities or other property shall be paid or transferred in lieu
of any fractional Shares or whether such fractional Shares or any rights
thereto shall be cancelled, terminated or otherwise eliminated.
 
  16.6 Headings. Headings are given to the subsections of the Plan solely as a
convenience to facilitate reference. Such headings shall not be deemed in any
way material or relevant to the construction or interpretation of the Plan or
any provision thereof.
 
  16.7 Effective Date. The Plan shall be effective as of the date of its
approval by the holders of a majority of the Shares of the Company represented
and voting at the next Annual or Special Meeting of Shareholders.
 
  16.8 Non-Transferability of Incentive Stock Options. Incentive Stock Options
shall not be transferable otherwise than by will or the laws of descent and
distribution, and Incentive Stock Options may be exercised, during the
lifetime of the holder, only by the holder. Any attempted assignment,
transfer, pledge, hypothecation or other disposition of an Incentive Stock
Option contrary to the provisions hereof, or the levy of any execution,
attachment or similar process upon an Incentive Stock Option shall be null and
void and without effect.
 
17. NAMED EXECUTIVE OFFICERS
 
  17.1 Applicability of Section 17. The provisions of this Section 17 shall
apply only to those executive officers (i) whose compensation is required to
be reported in the Company's proxy statement pursuant to Item 402(a)(3)(i) and
(ii) of Regulation S-K under the general rules and regulations under the
Exchange Act, as amended, and (ii) whose total compensation, including
estimated Awards, is determined by the Committee to possibly be subject to the
limitations on deductions imposed by Section 162(m) of the Code ("Named
Executive Officers"). In the event of any inconsistencies between this Section
17 and the other Plan provisions as they pertain to Named Executive Officers,
the provisions of this Section 17 shall control.
 
  17.2 Establishment of Performance Goals. Awards for Named Executive
Officers, other than stock options and Stock Appreciation Rights, shall be
based on the attainment of certain performance goals. No later than the
earlier of (i) ninety (90) days after the commencement of the applicable
fiscal year or such other award period as may be established by the Committee
("Award Period") and (ii) the completion of twenty-five percent (25%) of such
Award Period, the Committee shall establish, in writing, the performance goals
applicable to each such Award for Named Executive Officers. At the time the
performance goals are established by the Committee, their outcome must be
substantially uncertain. In addition, the performance goal must state, in
terms of an objective formula or standard, the method for computing the amount
of compensation payable to the Named Executive Officer if the goal is
obtained. Such formula or standard shall be sufficiently objective so that a
third party with knowledge of the relevant performance results could calculate
the amount to be paid to the subject Named Executive Officer. The material
terms of the performance goals for Named Executive Officers and the
compensation payable thereunder shall be submitted to the Shareholders of the
Company for their review and approval. Shareholder approval shall be obtained
for such performance goals prior to any Award being paid to such Named
Executive Officer. If the Shareholders do not approve such performance goals,
no amount shall be paid to such Named Executive Officer for such applicable
Award Period under the Plan. The disclosure of the "material terms" of a
performance goal and the compensation payable thereunder shall be determined
under the guidelines set forth under Section 162(m) of the Code, and the
Treasury Regulations thereunder.
 
  17.3 Components of Awards. Each Award of a Named Executive Officer, other
than stock options and Stock Appreciation Rights, shall be based on
performance goals which are sufficiently objective so that a third party
 
                                     FF-12
<PAGE>
 
having knowledge of the relevant facts could determine whether the goal was
met. Except as provided in subsection 17.8 herein, performance measures which
may serve as determinants of Named Executive Officers Awards shall be limited
to the following measures: earnings per share; return on assets; return on
equity; return on capital; net profit after taxes; net profit before taxes;
economic value added; operating profits; stock price; market share; and sales
or expenses. Within ninety (90) days following the end of each Award Period,
the Committee shall certify in writing that the performance goals, and any
other material terms were satisfied. Thereafter, Awards shall be made for each
Named Executive Officer as determined by the Committee. The Awards may not
vary from the preestablished amount based on the level of achievement.
 
  17.4 No Mid-Year Change in Awards. Except as provided in subsections 17.8
and 17.9 herein, each Named Executive Officers Awards shall be based
exclusively on the performance measures established by the Committee pursuant
to subsection 17.2.
 
  17.5 No Partial Award Period Participation. A Named Executive Officer who
becomes eligible to participate in the Plan after performance goals have been
established in an Award Period pursuant to subsection 17.2 may not participate
in the Plan prior to the next succeeding Award Period, except with respect to
Awards which are stock options or Stock Appreciation Rights.
 
  17.6 Performance Goals. Except as provided in subsection 17.8 herein,
performance goals shall not be changed following their establishment, and
Named Executive Officers shall not receive any payout, except with respect to
Awards which are stock options or Stock Appreciation Rights, when the minimum
performance goals are not met or exceeded.
 
  17.7 Individual Performance and Discretionary Adjustments. Except as
provided in subsection 17.8 herein, subjective evaluations of individual
performance of Named Executive Officers shall not be reflected in their
Awards, other than Awards which are stock options or Stock Appreciation
Rights. The payment of such Awards shall be entirely dependent upon the
attainment of the preestablished performance goals.
 
  17.8 Amendments. No amendment of the Plan with respect to any Named
Executive Officer may be made which would (i) increase the maximum amount that
can be paid to any one Participant under the Plan, (ii) change the specified
performance goal for payment of Awards, or (iii) modify the requirements as to
eligibility for participation in the Plan, unless the Company's Shareholders
have first approved such amendment in a manner which would permit the
deduction under Section 162(m) of the Code of such payment in the fiscal year
it is paid. The Committee shall amend this Section 17 and such other
provisions as it deems appropriate, to cause amounts payable to Named
Executive Officers to satisfy the requirements of Section 162(m) and the
Treasury Regulations promulgated thereunder.
 
  17.9 Stock Options and Stock Appreciation Rights. Notwithstanding any
provision of the Plan (including the provisions of this Section 17) to the
contrary, the amount of compensation which a Named Executive Officer may
receive with respect to stock options and Stock Appreciation Rights which are
granted hereunder is based solely on an increase in the value of the
applicable Shares after the date of grant of such Award. Thus, no stock option
may be granted hereunder to a Named Executive Officer with an exercise price
less than the Fair Market Value of Shares on the date of grant. Furthermore,
the maximum number of Shares (or cash equivalent value) with respect to which
stock options or Stock Appreciation Rights may be granted hereunder to any
Named Executive Officer during any calendar year may not exceed 100,000
Shares, subject to adjustment as provided in Section 13 hereunder.
 
  17.10 Maximum Amount of Compensation. The maximum amount of compensation
payable as an Award (other than an Award which is a stock option or Stock
Appreciation Right) to any Named Executive Officer during any calendar year
may not exceed $1,000,000.
 
                                     FF-13
<PAGE>
 
                                    PART II
 
                    INFORMATION NOT REQUIRED IN PROSPECTUS
 
ITEM 20. INDEMNIFICATION OF DIRECTORS AND OFFICERS
 
  Reference is made to Section 102(b)(7) of the Delaware General Corporation
Law (the "DGCL"), which enables a corporation in its original certificate of
incorporation or an amendment thereto to eliminate or limit the personal
liability of a director to the corporation or its stockholders for monetary
damages for breach of the director's fiduciary duty, except (i) for any breach
of the director's duty of loyalty to the corporation or its stockholders, (ii)
for acts or omissions not in good faith or which involve intentional
misconduct or a knowing violation of law, (iii) pursuant to Section 174 of the
DGCL (providing for liability of directors for unlawful payment of dividends
or unlawful stock purchases or redemptions), or (iv) for any transaction from
which the director derived an improper personal benefit. The Registrant's
Certificate of Incorporation contains provisions permitted by Section
102(b)(7) of the DGCL.
   
  Sheridan is incorporated under the laws of the State of Delaware. Section
145 of the DGCL ("Section 145") provides that a Delaware corporation may
indemnify any persons who are, or are threatened to be made, parties to any
threatened, pending or completed action, suit or proceeding, whether civil,
criminal, administrative or investigative (other than an action by or in the
right of such corporation), by reason of the fact that such person is or was
an officer, director, employee or agent of such corporation, or is or was
serving at the request of such corporation as a director, officer, employee or
agent of another corporation or enterprise. The indemnity may include expenses
(including attorneys' fees), judgments, fines and amounts paid in settlement
actually and reasonably incurred by such person in connection with such
action, suit or proceeding, provided such person acted in good faith and in a
manner he reasonably believed to be in or not opposed to the corporation's
best interests and, with respect to any criminal action or proceeding, had no
reasonable cause to believe that his conduct was unlawful. A Delaware
corporation may indemnify any persons who were or are parties or are
threatened to be made a party, to any threatened, pending or completed action
or suit by or in the right of the corporation by mason of the fact that such
person is or was a director, officer, employee or agent of such corporation,
or enterprise. The indemnity may include expenses (including attorneys' fees)
actually and reasonably incurred by such person in connection with the defense
or settlement of such action or suit, provided such person acted in good faith
and in a manner he reasonably believed to be in or not opposed to the
corporation's best interest except that no indemnification is permitted
without judicial approval if the officer is adjudged to be liable to the
corporation. Where an officer or director is successful on the merits or
otherwise in the defense of any action referred to above, the corporation must
indemnify him against the expenses which such officer or director has actually
and reasonably incurred.     
   
  Article Twelfth and Thirteenth of the Sheridan Certificate of Incorporation
requires Sheridan to indemnify its officers, directors, employees and agents
to the extent permitted under the DGCL. Article VIII of the Sheridan Bylaws
provides that Sheridan shall indemnify any person who was or is a party or is
threatened to be made a party to any threatened, pending, or completed action,
suit or proceeding, whether civil, criminal, administrative, or investigative
(other than an action by or in the right of Sheridan) by reason of the fact
that he is or was a director, officer, employee or agent of Sheridan, or is or
was serving at the request of Sheridan as a director, officer, employee or
agent of another corporation, partnership, joint venture, trust or other
enterprise, against expenses (including attorneys' fees), judgments, fines and
amounts paid in settlement actually and reasonably incurred by him in
connection with such action, suit or proceeding if he acted in good faith and
in a manner he reasonably believed to be in or not opposed to the best
interests of Sheridan, and with respect to any criminal action or proceeding,
had no reasonable cause to believe his conduct was unlawful. The termination
of any action, suit, or proceeding by judgment, order, settlement, conviction
or upon a plea of nolo contendere or its equivalent, shall not, of itself,
create a presumption that the person did not act in good faith and in a manner
which he reasonably believed to be in or not opposed to the best interests of
Sheridan, and, with respect to any criminal action or proceeding, had
reasonable cause to believe that his conduct was unlawful.     
 
 
                                     II-1
<PAGE>
 
   
  The Sheridan Bylaws further provide that Sheridan shall indemnify any person
who was or is a party or is threatened to be made a party to any threatened,
pending or completed action or suit by or in the right of Sheridan to procure
a judgment in its favor by reason of the fact that he is or was a director,
officer, employee or agent of Sheridan, or is or was serving at the request of
Sheridan as a director, officer, employee or agent of another corporation,
partnership, joint venture, trust or other enterprise against expenses
(including attorneys' fees) actually and reasonably incurred by him in
connection with the defense or settlement of such action or suit if he acted
in good faith and in a manner he reasonably believed to be in or not opposed
to the best interests of Sheridan and except that no indemnification shall be
made in respect of any claim, issue, or matter as to which such person shall
have been adjudged to be liable to Sheridan unless and only to the extent that
the Delaware Court of Chancery or the court in which such action or suit was
brought shall determine upon application that, despite the adjudication of
liability but in view of all the circumstances of the case, such person is
fairly and reasonably entitled to indemnify for such expenses which the
Delaware Court of Chancery of such other court shall deem proper.     
   
  The Sheridan Bylaws also provide that to the extent that a director,
officer, employee or agent of Sheridan has been successful on the merits or
otherwise in defense of any action, suit or proceeding referred to above, or
in defense of any claim, issue or matter therein, he shall be indemnified
against expenses (including attorneys' fees) actually and reasonably incurred
by him in connection therewith.     
   
  The Sheridan Bylaws further provide that any indemnification under the above
paragraphs (unless ordered by a court) shall be made by Sheridan only as
authorized in the specific case upon a determination that indemnification of
the director, officer, employee or agent is proper int he circumstances
because he has met the applicable standard of conduct set forth in the above
paragraph. Such determination shall be made (i) by the Board of Directors by a
majority vote of a quorum consisting of directors who were not parties to such
action, suit or proceeding, or (ii) if such a quorum is not obtainable, or,
even if obtainable, if a quorum of disinterested directors so directs, by
independent legal counsel in a written opinion, or (iii) by the stockholders.
Notwithstanding the foregoing, a director, officer, employee or agent of
Sheridan shall be able to contest any determination that the director,
officer, employee or agent has not met the applicable standard of conduct set
forth in the above paragraphs by petitioning a court of appropriate
jurisdiction.     
   
  The Sheridan Bylaws also provide that expenses (including attorneys' fees)
incurred by an officer or director in defending or settling any civil,
criminal, administrative or investigative action, suit or proceeding may be
paid by Sheridan in advance of the final disposition of such action, suit or
proceeding upon receipt of any undertaking by or on behalf of such director or
officer to repay such amount if it shall ultimately be determined that he is
not entitled to be indemnified by Sheridan as authorized in these paragraphs.
Such expenses incurred by other employees and agents may be so paid upon such
terms and conditions, if any, as the Board of Directors deems appropriate.
       
  The Sheridan Bylaws further provide that the indemnification and advancement
of expenses provided by, or granted pursuant to, the other sections of these
paragraphs shall not be deemed exclusive of any other rights to which those
seeking indemnification or advancement of expenses may be entitled under any
bylaw, agreement, vote of stockholders or disinterested directors or
otherwise, both as to action in his official capacity and as to action in
another capacity while holding such office.     
   
  The Sheridan Bylaws further provide that Sheridan shall have the power to
purchase and maintain insurance on behalf of any person who is or was a
director, officer, employee or agent of Sheridan, or is or was serving at the
request of Sheridan as a director, officer, employee or agent of another
corporation, partnership, joint venture, trust or other enterprise against any
liability asserted against him and incurred by him in any such capacity, or
arising out of his status as such, whether or not Sheridan would have the
power to indemnify him against such liability under the provisions of these
paragraphs.     
   
  The indemnification and advancement of expenses provided by, or granted
pursuant to the Sheridan Certificate of Incorporation, unless otherwise
provided when authorized or ratified, continue as to a person who     
 
                                     II-2
<PAGE>
 
has ceased to be a director, officer, employee or agent and shall inure to the
benefit of the heirs, executors and administrators of such a person.
   
  The foregoing discussion is qualified in its entirety by reference to the
DGCL and the Sheridan Certificate of Incorporation and Sheridan Bylaws.     
 
ITEM 21. EXHIBITS AND FINANCIAL STATEMENT SCHEDULES
 
  (A) EXHIBITS.
 
<TABLE>   
<CAPTION>
     EXHIBIT
       NO.                                EXHIBIT
     -------                              -------
     <C>     <S>
      2.1    Agreement of Merger--Included as Appendix "A" hereto
      3.1    Certificate of Incorporation of Sheridan Resources, Inc. as filed
             with the Delaware Secretary of State on July 1, 1996--Included as
             Appendix "B" hereto
      3.2    Bylaws of Sheridan Energy, Inc.--Included as Appendix "C" hereto
      4      Specimen Common Stock Certificate, $.01 par value per share, of
             Sheridan Energy, Inc. --Previously filed
             Opinion of Winstead Sechrest & Minick P.C. regarding legality--
      5      Previously filed
     23.1    Consent of Price Waterhouse LLP--Previously filed
             Consent of Winstead Sechrest & Minick P.C. (included in their
     23.2    opinion filed as Exhibit 5)
     24      Powers of Attorney--Previously filed
     99      Forms of Proxy Cards--Filed herewith
</TABLE>    
 
  (B) FINANCIAL STATEMENT SCHEDULES.
 
  All schedules are omitted because the required information is included in
the Consolidated Financial Statements or the Notes thereto or is otherwise
inapplicable.
 
ITEM 22. UNDERTAKINGS
 
  The undersigned Registrant hereby undertakes:
 
  (1) To file, during any period in which offers or sales are being made, a
post effective amendment to this Registration Statement:
 
    (i) To include any prospectus required by section 10(a)(3) of the
  Securities Act of 1933;
 
    (ii) To reflect in the prospectus any facts or events arising after the
  effective date of the Registration Statement (or the most recent post-
  effective amendment thereof) which, individually or in the aggregate,
  represent a fundamental change in the information set forth in the
  Registration Statement; and
 
    (iii) To include any material information with respect to the plan of
  distribution not previously disclosed in the Registration Statement or any
  material change to such information in the Registration Statement;
 
provided, however, that paragraphs (i) and (ii) do not apply if the
Registration Statement is on Form S-3 or Form S-8, and the information
required to be included in a post-effective amendment by those paragraphs is
contained in periodic reports filed by the Registrant pursuant to section 13
or section 15(d) of the Securities Exchange Act of 1934 that are incorporated
by reference in the Registration Statement.
 
  (2) That, for the purpose of determining any liability under the Securities
Act of 1933, each such post-effective amendment shall be deemed to be a new
registration statement relating to the securities offered therein, and the
offering of such securities at that time shall be deemed to be the initial
bona fide offering thereof.
 
  (3) To remove from registration by means of a post-effective amendment any
of the securities being registered which remain unsold at the termination of
the offering.
 
  (4) That, for purposes of determining any liability under the Securities Act
of 1933, each filing of the Registrant's annual report pursuant to section
13(a) or section 15(d) of the Securities Exchange Act of 1934 (and,
 
                                     II-3
<PAGE>
 
where applicable, each filing of an employee benefit plan's annual report
pursuant to section 15(d) of the Securities Exchange Act of 1934) that is
incorporated by reference in the Registration Statement shall be deemed to be
a new registration statement relating to the securities offered therein, and
the offering of such securities at that time shall be deemed to be the initial
bona fide offering thereof.
 
  (5) That prior to any public reoffering of the securities registered
hereunder through the use of a prospectus which is a part of this Registration
Statement, by any person or party who is deemed to be an underwriter within
the meaning of Rule 145(c), the Registrant undertakes that such reoffering
prospectus will contain the information called for by Form S-4 with respect to
reofferings by persons who may be deemed underwriters, in addition to the
information called for by the other items of Form S-4.
 
  (6) That every prospectus (i) that is filed pursuant to paragraph (5)
immediately preceding, or (ii) that purports to meet the requirements of
Section 10(a)(3) of the Act and is used in connection with an offering of
securities subject to Rule 415, will be filed as a part of an amendment to the
Registration Statement and will not be used until such amendment is effective,
and that, for purposes of determining any liability under the Securities Act
of 1933, each such post-effective amendment shall be deemed to be a new
registration statement relating to the securities offered therein, and the
offering of such securities at that time shall be deemed to be the initial
bona fide offering thereof.
 
  (7) Insofar as indemnification for liabilities arising under the Securities
Act of 1933 may be permitted to directors, officers and controlling persons of
the Registrant pursuant to the foregoing provisions, or otherwise, the
Registrant has been advised that in the opinion of the Securities and Exchange
Commission such indemnification is against public policy as expressed in the
Act and is, therefore, unenforceable. In the event that a claim for
indemnification against such liabilities (other than the payment by the
Registrant of expenses incurred or paid by a director, officer or controlling
person of the Registrant in the successful defense of any action, suit or
proceeding) is asserted by such director, officer or controlling person in
connection with the securities being registered, the Registrant will, unless
in the opinion of its counsel the matter has been settled by controlling
precedent, submit to a court of appropriate jurisdiction the question whether
such indemnification by it is against public policy as expressed in the Act
and will be governed by the final adjudication of such issue.
 
  (8) To respond to requests for information that is incorporated by reference
into the prospectus pursuant to Items 4, 10(b), 11, or 13 of this Form, within
one business day of receipt of such request, and to send the incorporated
documents by first class mail or other equally prompt means. This includes
information contained in documents filed subsequent to the effective date of
the Registration Statement through the date of responding to the request.
 
  (9) To supply by means of post-effective amendment all information
concerning a transaction, and the company being acquired involved therein,
that was not the subject of and included in the Registration Statement when it
became effective.
 
                                     II-4
<PAGE>
 
                                  SIGNATURES
 
  PURSUANT TO THE REQUIREMENTS OF THE SECURITIES ACT OF 1933, THE REGISTRANT
CERTIFIES THAT IT HAS REASONABLE GROUNDS TO BELIEVE THAT IT MEETS ALL OF THE
REQUIREMENTS FOR FILING ON FORM S-4 AND HAS DULY CAUSED THIS REGISTRATION
STATEMENT TO BE SIGNED ON ITS BEHALF BY THE UNDERSIGNED, THEREUNTO DULY
AUTHORIZED IN THE CITY OF HOUSTON, STATE OF TEXAS, ON THE 7TH DAY OF MAY,
1997.
                                             
                                          SHERIDAN ENERGY, INC.     
 
 
                                              /s/  Jeffrey E. Susskind*
                                          By __________________________________
                                                   Jeffrey E. Susskind
                                                  Chairman of the Board
 
<TABLE>
<CAPTION>
             SIGNATURE                           TITLE                    DATE
             ---------                           -----                    ----
 
<S>                                  <C>                           <C>
        Michael A. Gerlich           Vice President and Chief         May 7, 1997
____________________________________ Financial Officer
         Michael A. Gerlich          (Principal Financial
                                     Officer)
 
        David H. Scheiber*           Director                         May 7, 1997
____________________________________
         David H. Scheiber
 
       Jeffrey E. Susskind*          Chairman of the Board            May 7, 1997
____________________________________
        Jeffrey E. Susskind
 
</TABLE>
       Michael A. Gerlich
*By____________________________
       Michael A. Gerlich
        Attorney-in-Fact
 
                                     II-5