<PAGE>
     
                                                                     EXHIBIT 4.6
                                                                     -----------

(Stamp)                                           (Stamp)   
9739527 MB 3807 427                               212861
CB 2966 192                                       Filed of Record Clerk of Court
Prepared by and upon                              St. Charles Parish, La
recordation please return to:                     97 July, 31 AM 10:12
Craig W. Murray                                   Recorded in Mortgage Book
Vinson & Elkins L.L.P.                            640 Folio 255
2300 First City Tower                             Conveyance Book 525
1001 Fannin                                       Folio 1
Houston, Texas 77002-6760                      
                                                  (Stamp)
                                                  07/31/1997-39527
                                                  09:32:35 AM
                                                  JEFF PAR 497538 025
                                                  BJF  508.00

(Stamp)                                           (Stamp)
07/31/1997-39527                                  State of Louisiana
09:32:35 AM                                       Parish of St. Charles 
JEFF PAR 49758 025                                I hereby certify that the
BJF 508.00                                        within and foregoing is a 
                                                  true copy of the original 
                                                  on file in this office.

                                                  /s/ IMA H. ZEMGUE
                                                  ____________________________
                                                  Dep. Clerk of Court
                                                  St. Charles Parish


                      ACT OF MORTGAGE, SECURITY AGREEMENT,
                          ASSIGNMENT OF PRODUCTION AND
                              FINANCING STATEMENT



THE STATE OF LOUISIANA   (S)
                         (S)
PARISH OF ORLEANS        (S)


     Be it known that on this 30th day of July, 1997, before me, the
undersigned Notary Public, duly commissioned and qualified in and for the Parish
and State aforesaid, and therein residing, and in the presence of the
undersigned competent witnesses, whose names are subscribed hereto,
     
     Personally came and appeared FORMAN PETROLEUM CORPORATION, a Louisiana
     corporation, whose federal tax identification number is 72-0954774 with a
     mailing address of 650 Poydras Street, Suite 2200, New Orleans, Louisiana,
     70130-6101 appearing herein through Marvin J. Gay, its duly authorized Vice
     President, acting pursuant to resolutions of the Board of Directors of such
     corporation, a certified extract of which are attached hereto as Schedule I
     ("Mortgagor"),

which Mortgagor through its representative declared unto me, Notary, as follows:

                                   ARTICLE I
                                  DEFINITIONS
                                  -----------

        Mortgagor agrees that, as used in this instrument, the following terms
shall have the following meanings:
<PAGE>
 
        1.1  "CONTRACTS" means all contracts, operating agreements, farm-out or
farm-in agreements, sharing agreements, mineral purchase agreements, rights-of-
way, servitudes, easements, surface leases, permits, franchises, licenses,
pooling, communitization or unitization agreements, unit designations and
pooling orders now in effect or hereafter entered into by Mortgagor affecting
any of the Oil and Gas Properties, Operating Equipment, Immovable Collateral, or
Hydrocarbons now, or hereafter covered hereby, or which are useful or
appropriate in drilling for, producing, treating, handling, storing,
transporting or marketing oil, gas or other minerals produced from any of the
property affected by the Oil and Gas Properties.

        1.2  "DEFAULT RATE" means a rate of interest equal to the lesser of 18%
per annum or the Maximum Rate.

        1.3  "ENGINEERING REPORT" means that certain report prepared by Ryder
Scott Company for Mortgagor dated July 1, 1996, titled Estimated Future Reserves
and Income Attributable to Certain Leasehold and Royalty Interests in Boutte
Field, Lake Enfermer Field and Manila Village Field.

        1.4  "EVENT OF DEFAULT" shall have the meaning set forth in Article 5.1
hereof.

        1.5  "HAZARDOUS MATERIALS" means any flammable explosives, radioactive
materials, hazardous wastes, hazardous materials, hazardous or toxic substances,
or related materials as defined in the Comprehensive Environmental Response,
Compensation and Liability Act of 1980, as amended (42 U.S.C. (S) 9601 et seq.),
the Hazardous Materials Transportation Act, as amended (49 U.S.C. (S) 1801 et
seq.) the Resource Conservation and Recovery Act, as amended (42 U.S.C. (S) 6901
et seq.), and in the regulations adopted and publications promulgated pursuant
thereto, and all asbestos (friable or non-friable), petroleum derivatives,
polychlorinated biphenyls, and substances defined as hazardous materials under
any federal, state or local laws, ordinances, codes, rules, orders, regulations
or policies governing the use, storage, treatment, transportation, manufacture,
refinement, handling, production or disposal thereof.

        1.6  "HYDROCARBONS" means the oil, gas, casinghead gas, other liquid or
gaseous hydrocarbons and all other minerals in and under or attributable to and
that may be produced, obtained or secured from, the lands covered and affected
by the Oil and Gas Properties, and all products refined therefrom.

        1.7  "IMMOVABLE COLLATERAL" means all of Mortgagor's interests now owned
or hereafter acquired in and to all Immovable Operating Equipment and all
proceeds, products, renewals, increases, profits, substitutions, replacements,
additions, amendments and accessions thereof, thereto or therefor.

        1.8  "IMMOVABLE OPERATING EQUIPMENT" means any of the items described in
the first sentence of Section 1.17 which as a result of being incorporated into
realty or structures or 

                                      -2-
<PAGE>
 
improvements located therein or thereon, constitute immovables under the laws of
the State of Louisiana.

        1.9   "INDENTURE" means that certain Indenture dated as of June 3, 1997,
by and between Mortgagor and Mortgagee, as the same may from time to time be
amended, supplemented and/or restated.

        1.10  "MAXIMUM RATE" is defined in Article 6.6.

        1.11  "MORTGAGE" means this Act of Mortgage, Security Agreement,
Assignment of Production and Financing Statement, as it may be amended, modified
or supplemented from time to time.

        1.12  "MORTGAGED PROPERTY" means the Realty Collateral, Personalty
Collateral and Immovable Collateral, all proceeds thereof (including without
limitation the right to receive insurance proceeds attributable to the loss of
any portion of the foregoing), and products, renewals, increases, profits,
substitutions, replacements, additions, amendments and accessions thereof,
thereto or therefor.

        1.13  "MORTGAGEE" means U.S. Trust Company of Texas, N.A., as Trustee
under the Indenture, its successors and assigns (including, but not limited to,
any successor Trustee under the Indenture), on behalf of any legal owner,
holder, assignee or pledgee of any of the Obligations secured hereby.

        1.14  "NOTES" means, collectively, those certain 13.5% Senior Secured
Notes due 2004, Series A, and 13.5% Senior Secured Notes due 2004, Series B in
the aggregate principal amount of $70,000,000, issued by Mortgagor pursuant to
the Indenture, payable to the order of the respective "Holder" (as defined in
the Indenture) or its registered assigns, and with final maturity on or before
June 1, 2004, and any and all renewals, extensions for any period,
rearrangements, replacements, reissues, substitutions, increases and/or
modifications of any or all of said Notes.

        1.15  "OBLIGATIONS" means, whether now owed or hereafter existing or
arising (a)  all indebtedness, obligations and liabilities of Mortgagor under or
pursuant to the Indenture, including, without limitation, the principal of,
premium, if any, and interest on the Notes, and collection and attorneys' fees,
all as provided therein or in the Indenture, and all renewals, modifications,
rearrangements, replacements, or extensions of the Notes, in whole or in part;
(b) any sums which may be advanced or paid by Mortgagee under the terms hereof
or the Indenture on account of the failure of Mortgagor to comply with the
covenants of Mortgagor contained herein or in the Indenture, and all other
indebtedness of Mortgagor arising pursuant to the provisions of this Mortgage or
the Indenture; (c) all sums advanced or costs or expenses incurred by Mortgagee,
which are made or incurred pursuant to, or allowed by, the terms of this
Mortgage, the Indenture, or any other instrument executed in connection with the
Notes, including but not limited to, all 

                                      -3-
<PAGE>
 
reasonable legal fees incurred in connection with Mortgagee's due diligence,
plus interest thereon from the date of the advance until reimbursement of
Mortgagee charged at the Default Rate; and (d) all renewals, extensions,
rearrangements, replacements, amendments and substitutions of the above whether
or not Mortgagor executes any renewal or extension agreement.

        1.16  "OIL AND GAS PROPERTY OR PROPERTIES" means (a) the oil, gas and/or
mineral leases, mineral estates, mineral servitudes, subleases, farm outs,
royalties, overriding royalties, net profits interests, production payments and
other mineral interests described in Exhibit A attached hereto and made a part
hereof for all purposes, (b) any wells, production unit or units and wells which
may affect all or any portion of such mineral interests including, without
limitation, those units which may be described or referred to on Exhibit A or
any unit created under orders, regulations, rules or other official acts of any
Federal, state or other governmental body or agency having jurisdiction, (c) any
other interest in, to or relating to (i) all or any part of the land or leases
described in Exhibit A or (ii) any of the estates, property rights or other
interests referred to above, and (d) any instrument executed in amendment,
correction, modification, confirmation, renewal or extension of any of the
foregoing.

        1.17  "OPERATING EQUIPMENT" means all surface or subsurface machinery,
fixtures, equipment, facilities, supplies or other property of whatsoever kind
or nature (excluding drilling rigs, trucks, automotive equipment or other
property taken to the premises to drill a well or for other similar temporary
uses) now or hereafter located on or attributable to any of the property
affected by the Oil and Gas Properties which are useful for the production,
treatment, storage or transportation of Hydrocarbons, including, but not
limited to, all oil wells, gas wells, water wells, injection wells, casing,
tubing, rods, pumping units and engines, christmas trees, derricks, separators,
gun barrels, flow lines, tanks, gas systems (for gathering, treating and
compression), water systems (for treating, disposal and injection), power
plants, poles, lines, transformers, starters and controllers, machine shops,
tools, storage yards and equipment stored therein, buildings and camps,
telegraph, telephone and other communication systems, roads, loading racks and
shipping facilities.  Operating Equipment shall not include any items
incorporated into realty or structures or improvements located therein or
thereon in such a manner that they constitute immovables under the laws of the
State of Louisiana, but such items shall constitute Immovable Operating
Equipment under this Mortgage.

        1.18  "PERSONALTY COLLATERAL" means all of Mortgagor's interest now
owned or hereafter acquired in and to (i) all Operating Equipment, (ii) all
Hydrocarbons severed and extracted from or attributable to the Oil and Gas
Properties, including oil in tanks, (iii) all accounts (including, but not
limited to, accounts resulting from the sale of Hydrocarbons at the wellhead),
contract rights and general intangibles now or hereafter arising in connection
with the sale or other disposition of any Hydrocarbons, (iv) all Contracts and
all general intangibles now or hereafter arising in connection with or resulting
from Contracts, (v) all proceeds and products of the Realty Collateral and/or
Immovable Collateral, and (vi) all rents, issues, proceeds, products, renewals,
increases, profits, substitutions, replacements, additions, amendments and
accessions of, to or for all of the property described in this subparagraph.

                                      -4-
<PAGE>
 
        1.19  "REALTY COLLATERAL" means all of Mortgagor's interest now owned or
hereafter acquired, legal or beneficial in and to the Oil and Gas Properties and
all unsevered and unextracted Hydrocarbons (even though Mortgagor's interest
therein be incorrectly described in, or a description of a part or all such
interest be omitted from, Exhibit A).

        1.20  "UNIFORM COMMERCIAL CODE" OR "UCC" means Louisiana Commercial Laws
-- Secured Transactions (Chapter 9 of the Louisiana Uniform Commercial Code).

                                   ARTICLE II
                  CREATION OF PRIVILEGE AND SECURITY INTEREST
                  -------------------------------------------

        2.1  MORTGAGE AND PLEDGE.  In order to secure the full and punctual
payment and performance of the Obligations, whether now owed or hereafter
existing or arising, and the performance of the covenants and obligations
contained herein, Mortgagor does by these presents specially mortgage, pledge,
assign, hypothecate and warrant unto and in favor of Mortgagee, for itself and
as trustee on behalf of any holder of Obligations, the Mortgaged Property,
together with the right to receive insurance proceeds attributable to the
insurance loss of such property (as provided in LSA R.S. 9:5386).

        2.2  SECURITY INTEREST.  For the same consideration and to further
secure the Obligations, Mortgagor hereby grants to Mortgagee, for itself and as
trustee on behalf of any holder of Obligations, a security interest in and to
the Mortgaged Property (whether now owned or hereafter acquired by operation of
law or otherwise) insofar as the Mortgaged Property consists of equipment,
accounts, contract rights, general intangibles, insurance contracts, insurance
proceeds, Hydrocarbons (including oil in tanks), fixtures and any and all other
personal/movable property of any kind or character defined in and subject to the
provisions of the UCC, including the proceeds and products from any and all of
such personal property.

        2.3  FUTURE ADVANCES.  This Mortgage secures all future advances and
obligations constituting Obligations.  The total amount of Obligations secured
by this instrument (including without limitation as a mortgage and as an
assignment, and including without limitation all advances and Default Rate
interest hereunder) may decrease or increase from time to time, but at no time
shall the total amount of Obligations secured hereby exceed the sum of
$150,000,000.

                                  ARTICLE III
                            PROCEEDS FROM PRODUCTION
                            ------------------------

   3.1  ASSIGNMENT OF PRODUCTION.

        (a) Mortgagor, in order to further secure the Obligations, up to the
   maximum amount provided above in Section 2.3, effective as of the date hereof
   at 7:00 a.m. Central Time, U.S.A., has assigned, transferred, conveyed and
   delivered and does hereby assign, transfer, convey and deliver unto
   Mortgagee, for itself and as trustee on behalf of any holder of Obligations,

                                      -5-
<PAGE>
 
   Mortgagor's interest, now owned or hereafter acquired, in and to the
   Hydrocarbons (or the proceeds therefrom and the accounts produced from the
   sale thereof), the same to be delivered into pipelines connected to the Oil
   and Gas Properties, or to any other purchaser thereof to the credit of
   Mortgagee.

        (b) All parties producing, purchasing, taking, possessing, processing or
   receiving any production from the Oil and Gas Properties, or having in their
   possession any such production or the proceeds of runs and the accounts
   produced from the sale thereof for which they or others are accountable to
   Mortgagee by virtue of the provisions of this Section 3.1, are authorized and
   directed by Mortgagor to treat and regard Mortgagee as the assignee and
   transferee of Mortgagor and entitled in its place and stead to receive
   Mortgagor's interest, now owned or hereafter acquired, in and to the
   Hydrocarbons and the proceeds thereof and the accounts produced from the sale
   thereof.

        (c) Mortgagor directs and instructs each purchaser of production from
   the Oil and Gas Properties to pay to Mortgagee all of the proceeds of
   Mortgagor's interest, now owned or hereafter acquired, in and to the
   Hydrocarbons until such time as such purchaser has been furnished evidence
   that all of the Obligations have been paid and that the privilege evidenced
   hereby has been released.  Mortgagor authorizes Mortgagee to receive and
   collect all sums of money derived from the proceeds of all of Mortgagor's
   interest, now owned or hereafter acquired in and to the Hydrocarbons, and no
   purchaser of any production from the Oil and Gas Properties shall have any
   responsibility for the application of any funds paid to Mortgagee.

        (d) Mortgagee may (i) endorse and cash any and all checks and drafts
   payable to the order of Mortgagor or Mortgagee for the account of Mortgagor,
   received from or in connection with the revenues and proceeds of the
   Hydrocarbons affected hereby, and the same may be applied as provided herein
   and (ii) execute any transfer or division orders in the name of Mortgagor
   or otherwise, with warrants and indemnities binding on Mortgagor; provided
   that Mortgagee shall not be held liable for, nor be required to verify, the
   accuracy of Mortgagor's interests as represented therein.

        (e) Mortgagee shall have the right at Mortgagee's election and in the
   name of Mortgagor, or otherwise, to prosecute and defend any and all actions
   or legal proceedings deemed advisable by Mortgagee in order to collect such
   funds and to protect the interests of Mortgagee and/or Mortgagor, with all
   reasonable costs, expenses and attorneys fees incurred in connection
   therewith being paid by Mortgagor.

        (f) The foregoing provisions of this Section 3.1 shall constitute an
   absolute and present assignment of all Mortgagor's interest in the
   Hydrocarbons.  Mortgagee grants to Mortgagor a conditional license to receive
   and sell such Hydrocarbons, and the proceeds therefrom, and to use the same
   in accordance with the terms of this Mortgage until Mortgagee delivers
   written notice to Mortgagor that Mortgagee has elected to terminate such
   license at which time such conditional license shall terminate without
   further notice or action on the part 

                                      -6-
<PAGE>
 
   of Mortgagee. The existence or exercise of such conditional license shall not
   operate to subordinate this assignment, in whole or in part, to any
   subsequent assignment by Mortgagor permitted hereunder, and any such
   subsequent assignment by Mortgagor shall be subject to the rights of
   Mortgagee hereunder.

        3.2  APPLICATION OF PROCEEDS.  All payments received by Mortgagee
pursuant to this Article III shall either be held by Mortgagee in a cash
collateral account as additional Mortgaged Property or, at the option of
Mortgagee, applied at the time of receipt, or from time to time at the
discretion of Mortgagee if held in such cash collateral account, as follows:

        (a) First, to the satisfaction of all costs and expenses incurred in
   connection with the collection of such proceeds, and the payment of any part
   of the Obligations not represented by a written instrument;

        (b) Second, to the payment of all accrued interest on the Obligations;

        (c) Third, to the payment of any then due and owing principal
   constituting part of the Obligations and any other Obligations then due and
   payable; and

        (d) The balance, if any, shall be released to Mortgagor, if not retained
   by Mortgagee in the cash collateral account.

        3.3  RELEASE OF PROCEEDS.  Mortgagee or any future Mortgagee or
Mortgagees may at any time and from time to time release to Mortgagor or its
order all or any portion of the funds received from the proceeds of oil, gas or
other minerals as provided in this Article III without in any wise impairing,
releasing or discharging the lien, privilege and security of this instrument,
and the pledge and assignment herein provided for or affecting the validity
thereof.

        3.4  MORTGAGOR'S PAYMENT DUTIES.  Nothing contained herein will limit
Mortgagor's absolute duty to make payment of the Obligations when the proceeds,
if any, received by Mortgagee pursuant to this Article are insufficient to pay
the same, and the receipt of proceeds under this Article will be in addition to
all other security now or hereafter existing to secure payment of the
Obligations.

        3.5  LIABILITY OF MORTGAGEE.  Mortgagee is hereby absolved from all
liability for failure to enforce collection of any of such proceeds, and from
all other responsibility in connection therewith except the responsibility to
account to Mortgagor for proceeds actually received by Mortgagee.

        3.6  INDEMNIFICATION.  Mortgagor agrees to indemnify Mortgagee against
all claims, actions, liabilities, judgments, costs, attorneys' fees or other
charges of whatsoever kind or nature (hereafter referred to in this Article as
"Claims") made against or incurred by Mortgagee as a consequence of the
assertion either before or after the payment in full of the Obligations, that
Mortgagee 

                                      -7-
<PAGE>
 
received Hydrocarbons or proceeds pursuant to this Article III which were
claimed by third persons. Mortgagee will have the right to employ attorneys and
to defend against any such Claims and unless furnished with reasonable
indemnity, Mortgagee will have the right to pay or compromise and adjust all
such Claims. Mortgagor will indemnify and pay to Mortgagee all such amounts as
may be paid in respect thereof, or as may be successfully adjudicated against
Mortgagee and all such amounts shall be a part of the Obligation secured by this
instrument. The liabilities of Mortgagor as set forth in this Article will
survive the termination of this instrument.

                                   ARTICLE IV
                      MORTGAGOR'S WARRANTIES AND COVENANTS
                      ------------------------------------

        4.1  PAYMENT AND PERFORMANCE OF OBLIGATIONS.  Mortgagor covenants and
agrees that Mortgagor shall punctually pay when due all interest, principal and
premium, if any, comprising the Obligations secured by this instrument and all
other amounts and indebtedness secured and to be secured hereby and will perform
all of the terms, covenants and provisions of any loan or other agreement
entered into by Mortgagor and Mortgagee in connection herewith.

        4.2  WARRANTIES.  Mortgagor warrants as follows:

        (a) Mortgagor has good and marketable title to the Mortgaged Property
   free from all liens, security interests or other encumbrances except as
   specifically permitted by the provisions of Section 4.4(h) below.
   Notwithstanding anything contained in Exhibit A to the contrary, Mortgagor's
   ownership of the Oil and Gas Properties and the undivided interests therein
   as specified will afford Mortgagor not less than those net interests in the
   production from the Mortgaged Property  (or properties now or hereafter
   pooled or unitized therewith), or production which is allocated to such Oil
   and Gas Properties, and (ii) will cause Mortgagor to bear not more than that
   portion of the costs of drilling, developing and operating such leases, than
   those set forth in the Engineering Report; none of the Mortgaged Property is
   subject to a production sales contract; none of the Mortgaged Property is
   subject at present to any regulatory refund obligation and to Mortgagor's
   knowledge no facts exist which might cause the same to be imposed;

        (b) Mortgagor has the full power, authority and legal right to execute
   the Indenture, the Notes and any and all other instruments entered into in
   connection therewith, to perform the Obligations and to mortgage, pledge,
   assign and hypothecate the Mortgaged Property to Mortgagee without the
   consent of any person and has all licenses, permits, qualifications and other
   documentation necessary or appropriate to own, and if Mortgagor is the
   operator of any of the Mortgaged Property, to operate the Mortgaged Property.
   Mortgagor (a) is a corporation validly existing and in good standing under
   the laws of the State of Louisiana; (b) has all requisite authority to
   conduct its business and own and lease its properties; (c) is qualified and
   in good standing in every jurisdiction in which the nature of its business
   makes qualification necessary or where failure to qualify could have a
   material adverse effect on its financial condition or the performance of its
   obligations under the Indenture, the Notes and this 

                                      -8-
<PAGE>
 
   Mortgage. Mortgagor is in compliance in all respects with all laws and
   requirements applicable to its business, the violation of which might
   materially affect its obligations hereunder, and has obtained all approvals,
   licenses, exemptions and other authorizations from, and has accomplished all
   filings, registrations and qualifications with, any governmental agency that
   are necessary for the transaction of its business.

        (c) The representations of Mortgagor as to quantum and nature of the
   interest of Mortgagor in and to the Oil and Gas Properties set forth in the
   Engineering Report includes the entire interest of Mortgagor in the Oil and
   Gas Properties and are complete and accurate in all respects.  There are no
   "back-in" or "reversionary" interests held by third parties which could
   reduce the interest of Mortgagor in the Oil and Gas Properties except as
   expressly set forth in the Engineering Report.

        (d) Except as permitted by Section 4.4(h) below or as otherwise
   disclosed in writing prior to the date hereof, Mortgagor has not received any
   notice of any claim of lien, privilege, right, title or interest to any of
   the Mortgaged Property from any third party and Mortgagor does not have any
   knowledge of any facts, circumstances or conditions which could, by lapse of
   time or otherwise, result in any claim of right, title, privilege, lien or
   interest by any third party in or to the Mortgaged Property.

        (e) There are no prior consent rights or preferential purchase rights in
   third parties affecting any part of the Mortgaged Property.

        (f) No operating or other agreement to which Mortgagor is a party or by
   which Mortgagor is bound affecting any part of the Mortgaged Property
   requires Mortgagor to bear any of the costs relating to the Mortgaged
   Property greater than the leasehold interest of Mortgagor in such portion of
   the Mortgaged Property, except in the event Mortgagor is obligated under an
   operating agreement to assume a portion of a defaulting or non-consenting
   party's share of costs.

        (g) Mortgagor has not received any prepayment prior to the date hereof
   under any agreement providing for the sale by Mortgagor of Hydrocarbons which
   agreement contains a "take or pay" clause or similar arrangement that
   obligates Mortgagor to deliver Hydrocarbons at some future time without then
   or thereafter receiving full payment therefor.

        (h) Mortgagor is not obligated to "make up" any deliveries of oil or gas
   to any third party out of the production from any of the Oil and Gas
   Properties.

        (i) No approval or consent of any person or of any regulatory or
   administrative commission or authority or of any other governmental body is
   necessary under any existing laws or regulations (A) to authorize the
   execution and delivery of this instrument or of any written instruments
   constituting part or all of the Obligations or (B) except as may be provided
   by the rules of the Louisiana Department of Conservation or the relative
   state regulatory 

                                      -9-
<PAGE>
 
   authority having jurisdiction over oil and gas operations in Louisiana, to
   authorize the observance or performance by Mortgagor of the covenants
   contained in this instrument or in the written instruments constituting all
   or part of the Obligations.

        (j) To the best of Mortgagor's knowledge, after due inquiry and
   investigation, all information and other data contained in statements or
   reports furnished to Mortgagee by or on behalf of Mortgagor relating to the
   Mortgaged Property was complete and accurate when made or delivered to
   Mortgagee and did not omit to state any material facts necessary to make the
   information contained therein not misleading.

        (k) Each oil and gas lease constituting a portion of the Mortgaged
   Property is valid and subsisting, all covenants, conditions and obligations
   contained in each such oil and gas lease and any assignments or agreements
   relating thereto have been fully performed and complied with in all material
   respects, and there exists no unsatisfied demand or dispute between Mortgagor
   and any lessor or any party to any such assignment or agreement.

        (l) All proceeds from the sale of Mortgagor's interest in the
   Hydrocarbons are currently being paid in full to Mortgagor by the purchaser
   thereof on a timely basis and none of such proceeds are currently being held
   in suspense by such purchaser or any other party.

        (m) The operation of the Oil and Gas Properties and the sale,
   processing, transportation and marketing of Hydrocarbons has been and is
   currently being conducted in accordance with all applicable federal, state
   and local laws, rules, regulations, orders and ordinances including without
   limitation all applicable local, state and federal environmental laws,
   regulations, ordinances and administrative and judicial orders relating to
   the generation, recycling, reuse, sale, storage, handling, transport and
   disposal of any Hazardous Materials.

        (n) There is no pending or, to the best knowledge of Mortgagor,
   threatened claim, suit, judicial or administrative action or proceeding which
   involves or may involve the Mortgaged Property or any part thereof or the
   production of Hydrocarbons which, if adversely determined to Mortgagor, could
   have a material adverse effect on the Mortgaged Property or the ability of
   Mortgagor to perform its obligations under this instrument.

        (o) All taxes, assessments, and governmental charges imposed upon the
   Mortgaged Property or upon the income and profit of the Mortgaged Property
   have been paid when due.

        (p) Mortgagor's federal taxpayer identification number is accurately
   stated on page one of this instrument.

        (q) The address of Mortgagor's place of business, residence, chief
   executive office and office where Mortgagor keeps its records concerning
   accounts, contract rights and general intangibles is as set forth in Section
   6.12, and there has been no change in the location of Mortgagor's place of
   business, residence, chief executive office and office where it keeps such

                                      -10-
<PAGE>
 
   records and no change of Mortgagor's name during the four months immediately
   preceding the date of this instrument.

        4.3  FURTHER ASSURANCES.

        (a) Mortgagor covenants that Mortgagor shall execute and deliver such
   other and further instruments, and shall do such other and further acts as in
   the opinion of Mortgagee may be necessary or desirable to carry out more
   effectively the purposes of this instrument, including, without limiting the
   generality of the foregoing, the following:

             (i)   Prompt correction of any defect in the execution or
   acknowledgment of this instrument, any written instrument comprising part or
   all of the Obligations, or any other document used in connection herewith.

             (ii)  Prompt correction of any defect which may hereafter be
   discovered in the title to the Mortgaged Property.

             (iii) To indemnify and hold Mortgagee harmless from and against any
   and all costs and expenses, including, but not limited to, any and all cost,
   expense, loss, damage or liability which Mortgagee may suffer or incur by
   reason of the failure of title to all or part of the Mortgaged Property or by
   reason of the failure or inability of Mortgagor, for any reason, to convey
   the rights, titles and interest which this instrument purports to mortgage,
   pledge, hypothecate, convey, grant or assign.

             (iv)  Prompt execution and delivery of all division or transfer
   orders or other instruments which in Mortgagee's opinion are required to
   transfer to Mortgagee the proceeds from the sale of all of the Mortgagor's
   interest in and to all Hydrocarbons.

             (v)   Prompt payment when due and owing of all taxes, assessments
   and governmental charges imposed on this instrument, upon the interest of
   Mortgagee or upon the income and profits from any of the above.

        (b) Mortgagor covenants that Mortgagor shall maintain and preserve the
   first and prior  privilege, lien and security interest herein created so long
   as any of the Obligations remain unpaid.

        (c) Mortgagor covenants to immediately notify Mortgagee of any
   discontinuance of or change in the address of Mortgagor's place of business,
   residence, chief executive office or office where it keeps records concerning
   accounts, contract rights and general intangibles, or of Mortgagor's federal
   taxpayer identification number.

        (d) Mortgagor covenants that all information to be furnished to
   Mortgagee by or on behalf of Mortgagor shall be complete and accurate when
   made.

                                      -11-
<PAGE>
 
        (e) Mortgagor covenants to maintain its existence and continue to be a
   corporation in good standing in the states of Texas and Louisiana.

        (f) Mortgagor covenants to not create, assume, incur, suffer to exist or
   in any manner become liable, directly, indirectly, or contingently in respect
   to any debt other than debt permitted by the Indenture or otherwise permitted
   by Mortgagee in writing.

        4.4  OPERATION OF OIL AND GAS PROPERTIES.  As long as any of the
Obligations remain unpaid or unsatisfied, and whether or not Mortgagor is the
operator of the Oil and Gas Properties, Mortgagor, except as otherwise permitted
by the Indenture, shall (at Mortgagor's own expense):

        (a) not enter into any operating agreement, contract or agreement which
   materially adversely affects the Mortgaged Property;

        (b) neither abandon, forfeit, surrender, release, sell, assign,
   sublease, farmout or convey, nor agree to sell, assign, sublease, farmout or
   convey, nor mortgage or grant a privilege or security interest in, nor
   otherwise dispose of or encumber any of the Mortgaged Property or any
   interest therein, except for releases of leases which have expired by their
   own terms, reassignments under existing contract provisions, the sale of
   Hydrocarbons in the ordinary course of business, and transactions otherwise
   permitted herein, in the Indenture, or otherwise in writing by Mortgagee;

        (c) cause the Mortgaged Property to be maintained, developed and
   protected against drainage and continuously operated for the production and
   marketing of Hydrocarbons in a good and workmanlike manner as a prudent
   operator would in accordance with generally accepted practices, applicable
   oil and gas leases and Contracts, and all applicable Federal, state and local
   laws, rules and regulations, including all environmental laws;

        (d) promptly pay or cause to be paid when due and owing (i) all rentals
   and royalties payable in respect of the Mortgaged Property; (ii) all expenses
   incurred in or arising from the operation or development of the Mortgaged
   Property; (iii) all taxes, assessments and governmental charges imposed upon
   the Mortgaged Property, upon the income and profits from any of the Mortgaged
   Property, or upon Mortgagee because of its interest therein; and (iv) all
   local, state and federal taxes, payments and contributions for which
   Mortgagor may be liable; and indemnify Mortgagee from all liability in
   connection with any of the foregoing;

        (e) promptly take all action reasonably necessary to enforce or secure
   the observance or performance of any term, covenant, agreement or condition
   to be observed or performed by third parties under any Contract, or any part
   thereof, or to exercise any of its rights, remedies, powers and privileges
   under any Contract, all in accordance with the respective terms thereof;

        (f) cause the Operating Equipment and the Immovable Collateral to be
   kept in good 

                                      -12-
<PAGE>
 
   and effective operating condition, and cause to be made all repairs,
   renewals, replacements, additions and improvements thereof or thereto,
   necessary or appropriate in connection with the production of Hydrocarbons
   from the Oil and Gas Properties;

        (g) permit and do all things necessary or proper to enable Mortgagee
   (through its agents and employees) to enter upon the Oil and Gas Properties
   for the purpose of investigating and inspecting the condition and operations
   of the Mortgaged Property whenever they so desire;

        (h) cause the Mortgaged Property to be kept free and clear of liens,
   privileges, charges, security interests and encumbrances of every character
   other than liens permitted by the Indenture or otherwise permitted by
   Mortgagee in writing;

        (i) provide or cause to be provided, insurance (including appropriate
   self-insurance) against loss or damage of the kinds that, in the reasonable,
   good faith opinion of Mortgagor are adequate and appropriate for the conduct
   of the business of Mortgagor in a prudent manner, with reputable insurers or
   with the government of the United States or an agency or instrumentality
   thereof, in such amounts, with such deductibles, and by such methods as shall
   be either (i) consistent with past practices of Mortgagor or (ii) customary,
   in the reasonable, good faith opinion of Mortgagor, for corporations
   similarly situated in the industry, unless the failure to provide such
   insurance (together with all other such failures) would not have a material
   adverse effect on the financial condition or results of operations of
   Mortgagor;

        (j) cause all policies of insurance to provide the maximum prior written
   notice to Mortgagee of cancellation which the insurance company will provide;
   permit Mortgagee to apply any proceeds of such insurance which it may receive
   toward part or full satisfaction of any or all of the Obligations secured
   hereby whether or not they are then due and owing and whether or not they are
   liquidated or contingent; and permit Mortgagee to obtain replacement
   insurance (which may, but need not, be single interest insurance in favor of
   Mortgagee) if any insurance required hereby expires, is canceled or is
   otherwise not in full force and effect; and

        (k) furnish to Mortgagee, upon request, copies of all operating
   agreements, oil and/or gas purchase contracts, or other contracts or
   agreements relating to the Mortgaged Property.

   4.5  RECORDING.  Mortgagor covenants and agrees to promptly (at Mortgagor's
own expense) record, register, deposit and file this and every other instrument
in addition or supplemental thereto, including all applicable financing
statements, in such offices and places within the State of Louisiana, the state
where the Mortgagor has its principal place of business, and with the Minerals
Management Service and at such times and as often as may be necessary to
preserve, protect and renew the privilege and security interest herein created
as a first and prior privilege or security interest on real or personal
property, whether movable or immovable, as the case may be, and otherwise shall
do and perform all matters or things necessary or expedient to be done or
observed by reason of any applicable law or regulation of any state or of the
United States or any other 

                                      -13-
<PAGE>
 
competent authority for the purpose of effectively creating, perfecting,
maintaining and preserving the privilege and security interest created hereby in
and on the Mortgaged Property. Mortgagor shall pay all taxes payable upon the
recording of this and every other instrument in addition or supplement hereto.

   4.6  RECORDS, STATEMENTS AND REPORTS.  Mortgagor agrees and covenants to keep
proper books of record and account in which complete and correct entries shall
be made of Mortgagor's transactions in accordance with generally accepted
accounting principles and to furnish or cause to be furnished to Mortgagee, in
addition to any other information, schedules and reports otherwise required
hereby, the following:

        (a) the reports, documents and other information required to be
   delivered pursuant to Section 4.2 of the Indenture; and

        (b) such other information concerning operation of the Mortgaged
   Property, the title of Mortgagor to or the interest of Mortgagee in the
   Mortgaged Property and the business and affairs and financial condition of
   Mortgagor as Mortgagee may from time to time reasonably request.

                                   ARTICLE V
                              DEFAULT AND REMEDIES
                              --------------------

        5.1  EVENTS OF DEFAULT.  Mortgagor will be in default under this
instrument upon the happening of any of the following events or conditions
("Event of Default"):

        (a) Mortgagor or any endorser, guarantor, surety, accommodation party,
   or other person liable upon or for payment of any of the Obligations secured
   hereby fails to pay when due any of the Obligations secured hereby or to
   perform punctually any other obligation, covenant, term, or provision
   contained in or referred to in this instrument or any other instrument
   executed in connection herewith;

        (b) Any warranty or representation made in this instrument by Mortgagor
   or furnished to Mortgagee on behalf of Mortgagor is determined by Mortgagee
   to be untrue in any respect which would or might, in Mortgagee's opinion,
   result in substantial loss or impairment of the security provided by this
   instrument;

        (c) The entry of an order for relief under Title 11 of the United States
   Code as to Mortgagor or the adjudication of Mortgagor as insolvent or
   bankrupt pursuant to the provisions of any state insolvency or bankruptcy
   act; the commencement by Mortgagor of any case, proceeding or other action
   seeking any reorganization, arrangement, composition, adjustment,
   liquidation, dissolution or similar relief for itself under any present or
   future statute, law or regulation relating to bankruptcy, insolvency,
   reorganization or other relief for debtors; Mortgagor's consent to,
   acquiescence in or attempt to secure the appointment of any receiver 

                                      -14-
<PAGE>
 
   of all or any substantial part of its properties or of the Mortgaged
   Property; Mortgagor shall generally not pay its debts as they become due or
   shall admit in writing its inability to pay its debts or shall make a general
   assignment for the benefit of creditors; or Mortgagor shall take any
   corporate action to authorize any of the acts set forth above in this
   Paragraph;

        (d) Any case, proceeding or other action against Mortgagor shall be
   commenced seeking to have an order for relief entered against it as a debtor
   or seeking any reorganization, arrangement, composition, adjustment,
   liquidation, dissolution or similar relief under any present or future
   statute, law or regulation relating to bankruptcy, insolvency, reorganization
   or other relief for debtors, or seeking appointment of any receiver for
   Mortgagor or for all or any substantial part of its property or for the
   Mortgaged Property, and such case, proceeding or other action (i) results in
   the entry of an order for relief against it which is not fully stayed within
   seven business days after the entry thereof, or (ii) remains undismissed for
   an aggregate of thirty days (whether or not consecutive); or the possibility
   that any portion of the Mortgaged Property would, by operation of law or
   otherwise, devolve on or pass to any person other than Mortgagor and such
   situation shall continue and not be remedied within thirty days after the
   happening of any such event;

        (e) Mortgagor's title to the Mortgaged Property or any substantial part
   thereof becomes the subject matter of litigation which would or might, in
   Mortgagee's opinion, upon final determination result in substantial
   impairment or loss of the security provided by this instrument;

        (f) Except as specifically authorized herein, there is substantial
   damage to or destruction of or sale of any of the Mortgaged Property or the
   Mortgaged Property is subjected to any privilege, lien or encumbrances not
   permitted under Section 4.4(h);

        (g) Except as to any default which has been disclosed to Mortgagee in
   writing as of the date of this Mortgage, there occurs a default in the
   performance of any obligation of Mortgagor to any other party; or

        (h) An "Event of Default" occurs and is continuing under the Indenture.

   5.2  ACCELERATION UPON DEFAULT.  Upon the occurrence of any Event of Default,
or at any time thereafter, Mortgagee may, at its option, declare the entire
unpaid principal of, premium, if any, and interest accrued on the Obligations to
be forthwith due and payable, without any protest, presentment, demand, notice
of intent to accelerate, notice of acceleration or further notice of any kind,
all of which are hereby expressly waived by Mortgagor.

                                      -15-
<PAGE>
 
   5.3  RIGHTS TO MORTGAGED PROPERTY UPON DEFAULT.

        (a) Operation of property by Mortgagee.  Upon the occurrence of an Event
   of Default or at any time thereafter, and in addition to all other rights of
   Mortgagee, Mortgagee shall have the following rights and powers (but no
   obligation):

        (i)   To enter upon and take possession of any of the Realty Collateral,
   to exclude Mortgagor therefrom, and to hold, use, administer, manage and
   operate the same to the extent that Mortgagor could do so;

        (ii)  To operate the Realty Collateral, without any liability to
   Mortgagor in connection with such operations, except for Mortgagee's gross
   negligence or wilful misconduct; and

        (iii) To the extent that Mortgagor could do so, to collect, receive
   and receipt for all Hydrocarbons produced and sold from the Realty
   Collateral, to make repairs, to purchase machinery and equipment, to conduct
   workover operations, to drill additional wells, and to exercise every power,
   right and privilege of Mortgagor with respect to the Realty Collateral.

   When and if the expenses of such operation and development (including costs
   of unsuccessful workover operations or additional wells) have been paid, and
   the Obligations have been paid, the Realty Collateral shall be returned to
   Mortgagor (providing there has been no foreclosure sale).

        (b) Seizure.  Mortgagor for itself and its successors and assigns,
   agrees and stipulates that it shall be lawful for and Mortgagor authorizes
   Mortgagee without making a demand or putting in default, putting in default
   being expressly waived, to cause all and singular the Realty Collateral to be
   seized and sold by executory or other legal process without appraisement 
   (appraisement being hereby expressly waived) either in its entirety or in
   lots, or parcels as Mortgagee may determine to the highest bidder for cash or
   on such terms as Mortgagee may direct, Mortgagor for itself, its successors
   and assigns, hereby acknowledging the Obligations and confessing judgment for
   the full amount of the Obligations if the same are not paid when due, whether
   upon demand, acceleration, maturity or otherwise.

        (c) Foreclosure.  Upon the occurrence of an Event of Default (as
   hereinafter defined), Mortgagee shall have the right and power to proceed by
   suit or suits for specific performance of any covenant or agreement herein
   contained or in aid of the execution of any power herein granted or for any
   foreclosure hereunder or for the sale of the Realty Collateral under the
   judgment or decree of any court or courts of competent jurisdiction, or for
   the appointment of a receiver pending any foreclosure hereunder or the
   seizure and sale of the Realty Collateral under the order of a court or
   courts of competent jurisdiction under executory or other legal process, or
   for the enforcement of any other appropriate remedy.  Mortgagor agrees that,
   in the 

                                      -16-
<PAGE>
 
   event any proceedings are taken under this instrument by way of executory
   process or otherwise, any and all declarations of the facts made by authentic
   act before a notary public and in the presence of two witnesses, by a person
   declaring that such facts lie within his knowledge, shall constitute
   authentic evidence of such facts for the purpose of executory process.

        (d) Application of Proceeds.  The proceeds of any sale of the Mortgaged
   Property or any part thereof will be applied (A) first, to the payment of all
   expenses incurred by Mortgagee; (B) second, to the payment of the Obligations
   in such order as the Mortgagee may direct; and (C) third, the balance, if
   any, thereafter remaining will be paid to Mortgagor or Mortgagor's successors
   or assigns as their interests may appear upon demand of Mortgagor or
   Mortgagor's successors or assigns.

        (e) Keeper Provisions.  Upon the occurrence of an Event of Default,
   Mortgagee is authorized prior or subsequent to the institution of any
   foreclosure proceedings, to enter upon the Mortgaged Property, or any part
   thereof, and to exercise without interference from Mortgagor any and all
   rights which Mortgagor has with respect to the management, possession and
   operation of the Mortgaged Property, it being the intention to confer on
   Mortgagee or Mortgagee's agent, all of the rights granted to keepers of
   mineral interests by LSA R.S. 9:5131, et seq.  It is hereby agreed that the
   keeper shall be entitled to receive as compensation, in excess of its costs
   and expenses, an amount equal to one percent of the gross revenues of the
   Mortgaged Property.  All costs, expenses and liabilities of every character
   incurred by Mortgagee in managing, operating and maintaining such Mortgaged
   Property shall constitute a demand obligation owing by Mortgagor to
   Mortgagee, shall draw interest thereon from date of expenditure until date
   paid at the Default Rate, all of which shall constitute a portion of the
   Obligations secured by the privilege and lien evidenced by this instrument.

        (f) Waiver.  Mortgagor hereby expressly waives:

             (i)   The benefit of appraisement as provided for in Articles 2332,
   2336, 2723 and 2724 of the Louisiana Code of Civil Procedure and all other
   laws conferring the same;

             (ii)  The demand and three (3) days delay accorded by Articles 2639
   and 2721 of the Louisiana Code of Civil Procedure;

             (iii) The notice of seizure required by Articles 2293 and 2721 of
   the Louisiana Code of Civil Procedure; and

             (iv)  The benefit of any other provisions of Articles 2331, 2722
   and 2723 of the Louisiana Code of Civil Procedure and the benefit of any
   other laws conferring rights of appraisement, notice or delay;

        and Mortgagor agrees to the immediate seizure of the property subject
        hereto in the 

                                      -17-
<PAGE>
 
        event of suit hereon, and further, Mortgagee and any future holder or
        holders of the Notes shall be entitled to all of the rights and remedies
        provided in the UCC, by Articles 203-204 of the Louisiana Mineral Code,
        by Article 3278 et seq. of the Louisiana Civil Code and by any other
        laws now or hereafter in effect in the State of Louisiana.

        5.4  ACCUMULATION OF RIGHTS.  Every right, power and remedy herein given
to Mortgagee shall be cumulative of and in addition to every other right, power
and remedy herein specifically given and now or hereafter existing; and each and
every right, power and remedy, whether specifically given or otherwise existing,
may be exercised from time to time and so often and in such order as may be
deemed expedient by Mortgagee, and the exercise or the beginning of the exercise
of any such right, power or remedy shall not be deemed a waiver of the right to
exercise at the same time or thereafter any other right, power or remedy.  No
delay or omission by Mortgagee in the exercise of any right, power or remedy
shall impair any such right, power or remedy or operate as a waiver thereof or
of any other right, power or remedy then or thereafter existing and no single
sale or series of sales under this Article V shall exhaust Mortgagee's rights
and powers, but such power shall continue to exist for so long as, and may be
exercised in the manner hereinabove provided as often as, the circumstances
require to give Mortgagee full relief hereunder.

        5.5  MARSHALING.  Mortgagor, for itself and all who may claim through or
under Mortgagor waives, to the extent that Mortgagor may lawfully do so under
applicable law of the State of Louisiana, any and all rights to have the
Mortgaged Property marshaled upon any foreclosure of the lien and privilege
hereof, or sold in inverse order of alienation, and Mortgagor agrees that
Mortgagee may cause the Mortgaged Property to be sold as an entirety or in
parcels as Mortgagee may direct.

        5.6  RIGHTS TO PERSONALTY COLLATERAL UPON DEFAULT.  Upon the occurrence
of an Event of Default, or at any time thereafter, Mortgagee may proceed against
the Personalty Collateral in accordance with the rights and remedies granted
herein with respect to the Realty Collateral, each of which, including but not
limited to the confession of judgment, waivers of delay, notice and
appraisement, and appointment of a keeper, are expressly made subject to the
Personalty Collateral, or will have all rights and remedies granted by the
Uniform Commercial Code and this instrument. Mortgagee shall have the right to
take possession of the Personalty Collateral, and for this purpose Mortgagee may
enter upon any premises on which any or all of the Personalty Collateral is
situated and, to the extent that Mortgagor could do so, take possession of and
operate the Personalty Collateral or remove it therefrom.  Mortgagee may require
Mortgagor to assemble the Personalty Collateral and make it available to
Mortgagee at a place to be designated by Mortgagee which is reasonably
convenient to both parties.  Unless the Personalty Collateral is perishable or
threatens to decline speedily in value or is of a type customarily sold on a
recognized market, Mortgagee will send Mortgagor reasonable notice of the time
and place of any public sale or of the time after which any private sale or
other disposition of the Personalty Collateral is to be made.  This requirement
of sending reasonable notice will be met if such notice is mailed, postage
prepaid, to Mortgagor at the address designated in Section 6.12 (or such other
address as has been designated as provided herein) 

                                      -18-
<PAGE>
 
at least ten days before the time of the sale or disposition. In addition to the
expenses of retaking, holding, preparing for sale, selling and the like,
Mortgagee will be entitled to recover reasonable attorney's fees and legal
expenses as provided for in this instrument and in the writings evidencing said
Obligations before applying the balance of the proceeds from the sale or other
disposition toward satisfaction of the Obligations. Mortgagor will remain liable
for any deficiency remaining after the sale or other disposition.

        5.7  RIGHTS TO IMMOVABLE COLLATERAL UPON DEFAULT.  Upon the occurrence
of any Event of Default, or at any time thereafter, Mortgagee may elect to treat
the Immovable Collateral as either Realty Collateral or as Personalty Collateral
(but not both) and proceed to exercise such rights as apply to the type of
Mortgaged Property selected.

        5.8  ACCOUNT MORTGAGORS.  Mortgagee may, in its discretion, before or
after the occurrence of an Event of Default, notify any account debtors to make
payments directly to Mortgagee and contact account debtors directly to verify
information furnished by Mortgagor. Mortgagee shall not have any obligation to
preserve any rights against prior parties.

                                   ARTICLE VI
                                 MISCELLANEOUS
                                 -------------

        6.1  ADVANCES BY MORTGAGEE.  Each and every covenant of Mortgagor herein
contained shall be performed and kept by Mortgagor solely at Mortgagor's
expense.  If Mortgagor fails to perform or keep any of the covenants of
whatsoever kind or nature contained in this instrument, Mortgagee or any keeper
may, but will not be obligated to, make advances to perform the same on
Mortgagor's behalf, and Mortgagor hereby agrees to repay such sums and any
attorneys' fees incurred in connection therewith on demand plus interest thereon
from the date of the advance until paid at the Default Rate.  In addition,
Mortgagor hereby agrees to repay on demand any reasonable costs, expenses and
attorney's fees incurred by Mortgagee or any keeper which are to be obligations
of the Mortgagor pursuant to, or allowed by, the terms of this instrument, plus
interest thereon from the date of the advance until paid at the Default Rate.
Any such amounts so paid by Mortgagee or any keeper shall be considered part of
the Obligations secured hereby and shall be secured by this instrument and the
amount and nature of any such payment by Mortgagee and the date when paid shall
be held to be fully and authentically established by affidavit of Mortgagee or
its or their agents, servants or employees, and such amounts shall be paid as
part of the Obligations out of the proceeds of the sale of the Mortgaged
Property in the event of foreclosure or other proceedings together with interest
thereon at the rate provided for above; provided, however (a) that the amount of
the Obligations secured and to be secured hereby shall in no event exceed the
amount set out in Section 2.3 above and (b) that the exercise of any right or
advancement or payment of cost or expenses by Mortgagee or any keeper shall in
no manner be construed as a waiver of the rights of Mortgagee to demand payment
on the Obligations.  Mortgagee and any future Holder or Holders of the Notes
shall be and are hereby subrogated to all rights, liens and privileges securing
payment of any debt or claim for the payment of which Mortgagee may make
advances pursuant to the terms hereof.

                                      -19-
<PAGE>
 
        6.2  DEFENSE OF CLAIMS.  Mortgagor shall promptly notify Mortgagee in
writing of the commencement of any legal proceedings affecting Mortgagor's title
to the Mortgaged Property or the lien and privilege created hereby, and shall
take such action, employing attorneys agreeable to the Mortgagee, as may be
necessary to preserve Mortgagor's and Mortgagee's rights herein.  If Mortgagor
fails or refuses to defend Mortgagor's or Mortgagee's rights in and to the
Mortgaged Property, Mortgagee may take such action on behalf of and in the name
of Mortgagor and at Mortgagor's expense.  Moreover, Mortgagee may take such
independent action in connection therewith as it may in its discretion deem
proper, including, without limitation, the right to employ independent counsel
and to intervene in any suit affecting the Mortgaged Property.  All costs,
expenses and attorneys' fees incurred by Mortgagee pursuant to this Section 6.2
shall be paid by Mortgagor on demand plus interest thereon from the date of the
advance by Mortgagee until paid at the Default Rate.

        6.3  PARTIAL RELEASES.  The Mortgagee at all times shall have the right
to release any part of the Mortgaged Property now or hereafter subject to the
lien and privilege hereof or any part of the proceeds of production or any
income herein or hereafter assigned or pledged or any other security it now has
or may hereafter have securing said indebtedness, without releasing any other
part of said Mortgaged Property, proceeds, income or security and without
affecting the lien hereof as to the parts or parties not released, or the right
to future proceeds and income.

        6.4  RENEWALS, AMENDMENTS AND OTHER SECURITY.  Without notice or consent
of Mortgagor, renewals and extensions of the written instruments constituting
part or all of the Obligations may be given at any time and amendments may be
made to agreements relating to any part of such written instruments or the
Mortgaged Property.  Mortgagee may take or hold other security for the
Obligations without notice to or consent of Mortgagor.  The acceptance of this
instrument by Mortgagee shall not waive or impair any other security Mortgagee
may have or hereafter acquire to secure the payment of the Obligations nor shall
the taking of any such additional security waive or impair the lien and security
interests herein granted.  Mortgagee may resort first to such other security or
any part thereof, or first to the security herein given or any part thereof, or
from time to time to either or both, even to the partial or complete abandonment
of either security, and such action will not be a waiver of any rights conferred
by this instrument.

        6.5  ASSIGNMENT AND FINANCING STATEMENT.  This instrument will be deemed
to be and may be enforced from time to time as an assignment, chattel mortgage,
contract, deed of trust, financing statement, real estate mortgage, or security
agreement, and from time to time as any one or more thereof if appropriate under
applicable state law.  As a financing statement this instrument is intended to
cover all Personalty Collateral and Immovable Collateral, including without
limitation Mortgagor's interest in all Hydrocarbons as and after they are
severed by being reduced to possession at the wellhead and all accounts arising
from the sale thereof at the wellhead.  This instrument shall be filed in the
appropriate records of the county or counties or parish or parishes and the
state in which the Realty Collateral is located, in the Uniform Commercial Code
records of a parish in the State of Louisiana or other appropriate office of the
State in which any Personalty Collateral or any Realty Collateral is located and
in the Uniform Commercial Code Records of the 

                                      -20-
<PAGE>
 
state where Mortgagor's principal place of business is located (if not in
Louisiana). At Mortgagee's request Mortgagor shall execute financing statements
covering the Personalty Collateral and Immovable Collateral, which financing
statements may be filed in the Uniform Commercial Code records of a parish in
the State of Louisiana or any other state or other appropriate office of the
state in which any of the Mortgaged Property is located or where Mortgagor has
its principal place of business or in the parish where Mortgagor has its
principal place of business.

        6.6  LIMITATION ON INTEREST.  As used herein, the term "Maximum Rate"
shall mean and refer to the maximum rate of nonusurious interest, if any, that
Mortgagee may from time to time charge Mortgagor and in regard to which
Mortgagor would be prevented successfully from raising the claim or defense of
usury under applicable law as now, or to the extent permitted by law, as may
hereafter be, in effect (said law permitting the highest rate being herein
referred to as the "Interest Law").  It is the intention of Mortgagor and
Mortgagee to conform strictly to the Interest Law applicable to this loan
transaction.  Accordingly, it is agreed that notwithstanding any provision to
the contrary, the aggregate of all interest and any other charges or
consideration constituting interest under applicable Interest Law that is taken,
reserved, contracted for, charged or received under this Mortgage or otherwise
in connection with this loan transaction shall under no circumstances exceed the
maximum amount of interest allowed by the Interest Law applicable to this loan
transaction.  If any excess of interest in such respect is provided for, or
shall be adjudicated to be so provided for, in the Notes or in any of the
documents securing payment of the Notes or otherwise relating thereto, then in
such event (a) the provisions of this paragraph shall govern and control, (b)
neither Mortgagor nor Mortgagor's heirs, legal representatives, successors or
assigns or any other party liable for the payment of the Notes shall be
obligated to pay the amount of such interest to the extent that it is in excess
of the maximum amount of interest allowed by the Interest Law applicable to this
loan transaction, (c) any excess shall be deemed a mistake and canceled
automatically and, if theretofore paid, shall be credited on the Notes by
Mortgagee (or if the Notes shall have been paid in full, refunded to Mortgagor)
and (d) the effective rate of interest shall be automatically subject to
reduction to the Maximum Rate allowed under such Interest Law as now or
hereafter construed by courts of appropriate jurisdiction.  All sums paid or
agreed to be paid the Mortgagee for the use, forbearance or detention of the
indebtedness evidenced by the Notes shall, to the extent permitted by the
Interest Law applicable to this loan transaction, be amortized, prorated,
allocated and spread throughout the full term of the Notes.

        6.7  UNENFORCEABLE OR INAPPLICABLE PROVISIONS.  If any provision hereof
is invalid or unenforceable, the other provisions hereof will remain in full
force and effect and will be liberally construed in favor of Mortgagee in order
to carry out the provisions hereof.

        6.8  RIGHTS CUMULATIVE.  Each and every right, power and remedy herein
given to Mortgagee will be cumulative and not exclusive, and each and every
right, power and remedy whether specifically herein given or otherwise
existing may be exercised from time to time and as often and in such order as
may be deemed expedient by Mortgagee, and the exercise, or the beginning of the
exercise, of any such right, power or remedy will not be deemed a waiver of the
right to exercise, at the same time or thereafter, any other right, power or
remedy.  No delay or omission by Mortgagee 

                                      -21-
<PAGE>
 
in the exercise of any right, power or remedy will impair any such right, power
or remedy or operate as a waiver thereof or of any other right, power or remedy
then or thereafter existing.

        6.9   WAIVER BY MORTGAGEE.  Any and all covenants in this instrument may
from time to time by instrument in writing by the Mortgagee, be waived to such
extent and in such manner as Mortgagee may desire, but no such waiver will ever
affect or impair Mortgagee's rights hereunder, except to the extent specifically
stated in such written instrument.  All changes to and modifications of this
instrument must be in writing by authentic act and signed by Mortgagee.

        6.10  TERMS.  The term "Mortgagor" as used in this instrument will be
construed as singular or plural to correspond with the number of persons
executing this instrument as Mortgagor. If more than one person executes this
instrument as Mortgagor, their duties, covenants, warranties and liabilities
under this instrument will be joint, several and in solido, and any occurrence
of an Event of Default as to one Mortgagor shall be deemed an Event of Default
as to each Mortgagor. The terms "Mortgagee" and "Mortgagor" as used in this
instrument include the heirs, executors or administrators, successors,
representatives, receivers, and assigns of those parties.  This instrument is
binding upon Mortgagor, Mortgagor's successors and assigns, as well as upon any
person, firm or corporation hereafter acquiring title to any of the Mortgaged
Property by, through or under Mortgagor and will inure to the benefit of
Mortgagee and its successors and assigns.

        6.11  GOVERNING LAW.  THIS INSTRUMENT SHALL BE GOVERNED BY AND CONSTRUED
IN ACCORDANCE WITH THE LAWS OF THE STATE OF LOUISIANA, SUBJECT, HOWEVER, TO THE
EFFECT OF APPLICABLE FEDERAL LAW (INCLUDING, WITHOUT LIMITATION, 12 U.S.C. 85).

        6.12  NOTICE. All notices required or permitted to be given by Mortgagor
or Mortgagee shall be given in writing and may be effected by personal delivery,
by facsimile or by placing the same in the U. S. Mail, registered or certified,
return receipt requested, postage prepaid and addressed as follows:

   Mortgagor:     FORMAN PETROLEUM CORPORATION
                  650 Poydras Street - Suite 2200
                  New Orleans, Louisiana 70130-6101
                  Attn: Marvin J. Gay
 
   Mortgagee:     U.S. TRUST COMPANY OF TEXAS, N.A.
                  2001 Ross Avenue, Suite 2700
                  Dallas, Texas  75201
                  Attn:  Corporate Trust

Unless otherwise provided herein, all notices shall be deemed given (i) upon
receipt if hand delivered or sent by facsimile, or (ii) if sent by mail, three
days following the date deposited in the mail.  Mortgagor agrees that its
address shall be changed only by depositing notice of such change 

                                      -22-
<PAGE>
 
enclosed in a post-paid wrapper in a post office or official depository under
the care and custody of the United States Postal Service, certified mail,
postage prepaid, return receipt requested, addressed to Mortgagee at the address
set out above (or to such other address as Mortgagee may have designated by
notice given as provided above, to Mortgagor). Any such notice of change of
address of Mortgagor or Mortgagee or other holder of the Obligations shall be
effective five business days after such deposit.

        6.13  SURETY WAIVERS.  Mortgagor agrees that no acceleration of the
maturity of the Obligations, no renewal, extension or rearrangement of or any
other indulgence with respect to the Obligations, no change in the place or
manner of payment of or other change in the terms of the Obligations, no release
of or substitution for any security or other guaranty now or hereafter held by
Mortgagee for payment of the Obligations, no release of any person liable for
payment or purchase of the Obligations, including, without limitation, any
maker, endorser, guarantor or surety (any such other person is referred to
herein as an "Other Liable Party"), no delay in enforcement of payment of the
Obligations and no delay or omission or lack of diligence or care in exercising
any right or power with respect to the Obligations or any security therefor or
guaranty thereof, shall in any manner impair or affect the rights of Mortgagee
or the obligations, duties and liabilities of Mortgagor hereunder.  Mortgagor
agrees that it shall not be necessary or required that Mortgagee make demand for
payment upon any Other Liable Party or present the Obligations for payment by
any Other Liable Party or make protest thereof or give notice to any Other
Liable Party of maturity or nonpayment of the Obligations by any Other Liable
Party or file suit or proceed to obtain or assert a claim for personal judgment
against any Other Liable Party for the Obligations or make any effort at
collection of the Obligations or exercise or assert any other right or remedy to
which Mortgagee is or may be entitled in connection with the Obligations or any
security therefor or assert or file at any time any claim against the assets or
estate of any Other Liable Party as a condition of enforcing this instrument.
Mortgagor waives any right to the benefit of or to require or control
application of any Mortgaged Property now existing or hereafter obtained by
Mortgagee as security for the Obligations and agrees that Mortgagee shall have
no duty insofar as Mortgagor is concerned to apply upon any of the Obligations,
any money, payments or other property at any time received by or paid to or in
the possession of Mortgagee.  Mortgagor agrees that except for the gross
negligence or willful misconduct of Mortgagee, Mortgagor shall have no recourse
or action against Mortgagee by reason of any action Mortgagee may take or omit
to take in connection with the Obligations or the collection of any sums or
amounts herein mentioned, or in connection with any security or any other
guaranty at any time existing therefor.

        6.14  CONDEMNATION.  All awards and payments heretofore and hereafter
made for the taking of or injury to the Mortgaged Property, or any portion
thereof, whether such taking or injury be done under the power of eminent domain
or otherwise, are hereby assigned, and shall be paid to Mortgagee.  Mortgagee is
hereby authorized to collect and receive the proceeds of such awards and
payments and to give proper receipts and acquittances therefor.  Mortgagor
hereby agrees to make, execute and deliver, upon request, any and all
assignments and other instruments sufficient for the purpose of confirming this
assignment of the awards and payments to Mortgagee free and clear of any
encumbrances of any king or nature whatsoever.  Any such award or payment may,
at the option 

                                      -23-
<PAGE>
 
of Mortgagee, be retained and applied by Mortgagee after payment of reasonable
attorneys' fees, costs and expenses incurred in connection with the collection
of such award or payment toward payment of all or a portion of the Obligations,
whether or not the Obligations are then due and payable, or be paid over wholly
or in part to Mortgagor for the purpose of altering, restoring or re building
any part of the Mortgaged Property which may have been altered, damaged or
destroyed as a result of any such taking, or other injury to the Mortgaged
Property.

        6.15    WAIVER OF NOTARY'S CERTIFICATES.  The parties hereto expressly
waive the production of mortgage, conveyance or tax certificates and hereby
relieve and release me, said Notary, and agree to hold me harmless from and by
reason of the nonproduction and nonannexation thereof to this instrument.

        6.16    SUBROGATION.  This instrument is made with full substitution and
subrogation of Mortgagee, its successors and assigns, in and to all covenants,
warranties and representations by others heretofore given or made with respect
to title in and to the Mortgaged Property or any part thereof whether recorded
or unrecorded by contract or otherwise, to the extent that such covenants,
warranties and representations may be so subrogated and to any liens or
privileges covering any property or properties of Mortgagor securing the payment
of any indebtedness which is fully or partially discharged by funds made
available to Mortgagor and secured hereby, to the full extent that such
subrogation of liens and privileges is allowed under applicable state law.

        6.17    RELIANCE.  Notwithstanding any reference to the Indenture, the
Notes, or any other documents, all persons shall be fully authorized to rely
upon certificates of the Mortgagee as to the occurrence or non-occurrence of any
event or the existence or non-existence of any fact under the Indenture, the
Notes, or any other documents including but not limited to the occurrence of any
Event of Default thereunder, and no person shall have any obligation to
determine the correctness of any matter stated in any such certificate.

        6.18    NO PARAPH.  Mortgagor and Mortgagee acknowledge that none of the
Notes, Indenture, or other documents have been presented to the undersigned
Notary Public to be paraphed "Ne Varietur" for identification with this
Mortgage.

        6.19    TERMINATION. In accordance with the provisions of Louisiana
Civil Code article 3298, as amended from time to time, if the Mortgagor shall
pay in full when due the Obligations and shall duly and timely perform and
observe all of the terms, provisions, covenants and agreements herein and in the
Notes, the Indenture, and the other documents to be performed and observed by
Mortgagor, and if neither the Mortgagor nor the Mortgagee nor the Holders is
bound to the other or to any third person to permit any Obligation to be
incurred then or thereafter, then upon sixty (60) days prior written notice the
Mortgagor may request the Mortgagee to terminate the Mortgage. Upon such
termination the Mortgagor may further request the Mortgagee to provide a written
act of release of this Mortgage. Mortgagee agrees to deliver such an act of
release, all at the cost and expense of the Mortgagor, within sixty (60) days of
receiving such request unless Mortgagee, in good faith, has cause to believe
that Mortgagor is not entitled to a termination of this Mortgage.

                                      -24-
<PAGE>
 
        6.20    ACCEPTANCE BY MORTGAGEE.  The acceptance by Mortgagee of the
benefits of this Mortgage is presumed without the necessity of signature of this
Mortgage by the Mortgagee.
    
        Thus done and passed in my office in Orleans Parish, State of Louisiana,
this 30th day of July, 1997, in the presence of the undersigned competent
witnesses who hereunto sign their names with the Mortgagor and me, Notary, after
due reading of the whole.

 
                                 MORTGAGOR
Witnesses to all
signatures:                      FORMAN PETROLEUM CORPORATION


/s/ JUDY REIMEL
___________________________ 
Name: Judy Reimel                    /s/ MARVIN J. GAY
                                 By:_____________________________________
                                       Marvin J.  Gay
                                       Vice President

/s/ SHAREN OHLSSON                                    
___________________________
Name: Sharen Ohlsson

                                  /s/ THOMAS J. SEVY
                                 ________________________________________
                                 Notary Public in and for
                                 The State of Louisiana
                                 Parish of Orleans
                                 Name: Thomas J. Sevy
                                 My Commission Expires: 2 + month
     


            (Signature Page to Act of Mortgage, Security Agreement,
               Assignment of Production and Financing Statement)

                                      -25-
<PAGE>
 
                                   EXHIBIT A

                                   PREAMBLE
                                   LOUISIANA

        This Exhibit A sets forth the description of the Oil and Gas Properties
covered by the Act of Mortgage, Security Agreement, Assignment of Production and
Financing Statement to which this Exhibit A is attached (the "Mortgage").
Capitalized terms used in this Preamble and not otherwise defined herein shall
have the meanings ascribed thereto in the Mortgage.

          1.   This Exhibit A consists of descriptions of oil, gas and
mineral leases covering lands located within the State of Louisiana or federal
lands located on the Outer Continental Shelf and offshore of the State of
Louisiana.  The heading for each lease or group of leases includes Mortgagor's
internal prospect name.

          2.   Exhibit A includes one or more pages with the following
subheadings:

Leases:         The description of the lease or leases in which Mortgagor owns
                an interest covered by this Exhibit. Where applicable, the
                original lessor and lessee, Federal Lease Number, the date of
                the lease and other descriptive information relating to the
                lease are set forth. Such description shall include all of
                Mortgagor's right, title and interest in the oil, gas and
                mineral leases and other interests listed in this Exhibit and
                not any interest in excess thereof.

Contract List:  Exhibit A may include one or more pages with the heading
                "Contract List" which list certain agreements that affect
                Mortgagor's interest in the oil, gas and mineral leases and
                other interests, and Mortgagor's interest in the wells or units
                described or referred to in the Exhibit, which oil, gas and
                mineral leases and other interests and wells or units are
                located in the prospect identified in the heading of the page of
                the Exhibit, to the extent such agreements are in force and
                effect. The reference to such agreements shall not constitute a
                ratification or other recognition of the validity or
                effectiveness of such agreements or otherwise revive same. Such
                contracts are referred to by the type of agreement and affects
                Mortgagor's interest in oil, gas and mineral leases and other
                interests. Also shown is the date or the effective date of the
                agreement and the parties to the agreement.

Ownership
Interests:      Exhibit A includes Mortgagor's Working Interest and the
                Mortgagor's Net Revenue Interest (identified as Ownership
                Interest) for certain wells, units or areas covered by a lease.
                The wells or units are located in the prospect identified in the
                heading of the exhibit, and the prospect is located in the
                parish of the State of Louisiana referred to in the description
                or on federal lands located on the 

                                  Exhibit A-1
<PAGE>
 
          Outer Continental Shelf and offshore of the State of Louisiana. The
          wells or units in the particular prospect are located upon the lands
          covered by the oil, gas and mineral leases, overriding royalties or
          other interests described in the exhibit that relates to that prospect
          or lands pooled therewith. The descriptions include the following:

               Well or
               Unit Name:  The particular well or unit located within the
                           prospect identified in the heading.

               Working
               Interest:   Mortgagor's Working Interest.

               Net Revenue
               Interest:   Mortgagor's Net Revenue Interest.

          The Working Interests and Net Revenue Interests are computed and set
          out herein after taking into account all of the terms, provisions and
          conditions of the agreements and other instruments listed on the
          "Contract List".

          The Mortgagor's Net Revenue Interest means (i) with respect to a unit
          for which the Mortgagor's Net Revenue Interest is stated, that
          interest in the applicable oil or gas production produced, saved and
          sold from such unitized, pooled, communitized or participating areas
          with respect to the existing interval in which the well or wells
          located on such unit are completed, which is owned by the Mortgagor by
          virtue of its ownership of the Mortgagor's Working Interest in the
          leases included in whole or in part in such area after deducting all
          burdens against the production therefrom, and (ii) with respect to a
          well for which the Mortgagor's Net Revenue Interest is stated, that
          interest in the existing interval in which such well is completed for
          production after deducting all burdens against the production
          therefrom which is owned by the Mortgagor by virtue of its ownership
          of the Mortgagor's Working Interest in the lease on which such well is
          located.

          Mortgagor's interest may decrease or increase as a result of a
          reversionary interest, an operation wherein Mortgagor has paid costs
          attributable to the interest of a non-consenting party or a consenting
          party has paid costs attributable to the interest of Mortgagor as a
          non-consenting party, and the consenting party is entitled to recover
          a percentage of its cost, or other circumstance which triggers an
          increase or decrease in such interest.  Mortgagor makes no undertaking
          concerning the terms and conditions of the reversion or the status of
          payout, the costs that may be recovered, whether or when such recovery
          has occurred or will occur, or, in the case of an election, what
          election will be made.

                                  Exhibit A-2
<PAGE>
 
                                  SCHEDULE 1

                             NOTARY'S CERTIFICATE
    
        The undersigned Notary Public does hereby certify that attached hereto
is a full, true, and correct copy of resolutions of Forman Petroleum Corporation
attached to an Act of Mortgage, Security Agreement, Assignment of Production and
Financing Statement passed before me this 30th day of July, 1997.

                                 Thomas J. Sevy
                         _____________________________
                                 NOTARY PUBLIC
     


                                 Schedule 1-1
<PAGE>
 
                                   EXHIBIT A
                                                                    Page 1 of 64

                               COVERING LANDS IN
                     LAFOURCHE PARISH, STATE OF LOUISIANA

================================================================================

                                   EFFECTIVE             CURRENT RECORDING
 PROPERTY NO     LEASE DATE          DATE            BOOK     PAGE      ENTRY
 
02-0000082-001    08/20/1974      08/20/1974         523        34     393815
GROSS ACRES       LESSOR     :    DR. J.A. GRAVOIS
       0.00000    LESSOR ID  :
                  LESSEE     :    TEXAS GAS EXPLORATION CORPORATION
                  PROSPECT   :    LAKE ENFERMER
<PAGE>
 
                                   EXHIBIT A
                                                                    Page 2 of 64

                               COVERING LANDS IN
                     LAFOURCHE PARISH, STATE OF LOUISIANA

================================================================================

                                   EFFECTIVE             CURRENT RECORDING
 PROPERTY NO     LEASE DATE          DATE            BOOK     PAGE      ENTRY

05-0000200-001    03/08/1976      03/08/1976         569       667     422170
GROSS ACRES       LESSOR     :    LAFOURCHE REALTY COMPANY, INC.
       4.58000    LESSOR ID  :
                  LESSEE     :    TEXAS GAS EXPLORATION CORPORATION
                  PROSPECT   :    LAKE ENFERMER


                                   EFFECTIVE             CURRENT RECORDING
 PROPERTY NO     LEASE DATE          DATE            BOOK     PAGE      ENTRY

05-0000203-001    12/12/1972      12/12/1972          552      208     414734
GROSS ACRES       LESSOR     :    LAFOURCHE REALTY COMPANY INC
       0.22900    LESSOR ID  :
                  LESSEE     :    LYNAL INC
                  PROSPECT   :    LAKE ENFERMER


                                   EFFECTIVE             CURRENT RECORDING
 PROPERTY NO     LEASE DATE          DATE            BOOK     PAGE      ENTRY

05-0000206-001    05/24/1973      05/24/1973          506      834     382504
GROSS ACRES       LESSOR     :    JOHN M CULVER AND JANE DUSENBURY
                                  CULVER, ET AL
       0.35781    LESSOR ID  :
                  LESSEE     :    TEXAS GAS EXPLORATION
                  PROSPECT   :    LAKE ENFERMER


                                   EFFECTIVE             CURRENT RECORDING
 PROPERTY NO     LEASE DATE          DATE            BOOK     PAGE      ENTRY

05-0000207-001    05/03/1973      05/03/1973          506      831     382503
GROSS ACRES       LESSOR     :    JAMES B THOMAS, ET AL
       0.35781    LESSOR ID  :
                  LESSEE     :    TEXAS GAS EXPLORATION CORPORATION
                  PROSPECT   :    LAKE ENFERMER
<PAGE>
 
                                   EXHIBIT A
                                                                    Page 3 of 64

                               COVERING LANDS IN
                     LAFOURCHE PARISH, STATE OF LOUISIANA

================================================================================

                                   EFFECTIVE             CURRENT RECORDING
 PROPERTY NO     LEASE DATE          DATE            BOOK     PAGE      ENTRY 

05-0000208-001    12/07/1972      12/07/1972          516      372     389020
GROSS ACRES       LESSOR     :    JAMES P THOMAS
       0.35781    LESSOR ID  :
                  LESSEE     :    LYNAL, INC
                  PROSPECT   :    LAKE ENFERMER


                                   EFFECTIVE             CURRENT RECORDING
 PROPERTY NO     LEASE DATE          DATE            BOOK     PAGE      ENTRY
 
05-0000209-001    05/12/1976      05/12/1976
GROSS ACRES       LESSOR     :    LAFOURCHE REALTY COMPANY INC
       1.12210    LESSOR ID  :
                  LESSEE     :    MCMORAN EXPLORATION COMPANY
                  PROSPECT   :    LAKE ENFERMER
<PAGE>
 
                                  EXHIBIT A 
                                                                    Page 4 of 64

                               COVERING LANDS IN
                     LAFOURCHE PARISH, STATE OF LOUISIANA

================================================================================

                                   EFFECTIVE             CURRENT RECORDING
 PROPERTY NO     LEASE DATE          DATE            BOOK     PAGE      ENTRY

01-0001537-001    12/10/1973      12/10/1973          506      257     382128
GROSS ACRES       LESSOR     :    LAFOURCHE REALTY COMPANY INC.
       7.62200    LESSOR ID  :
                  LESSEE     :    LYNAL EXPLORATION COMPANY
                  PROSPECT   :    LAKE ENFERMER


                                   EFFECTIVE             CURRENT RECORDING
 PROPERTY NO     LEASE DATE          DATE            BOOK     PAGE      ENTRY

01-0002046-001    09/26/1975      09/26/1975          551      357     414240
GROSS ACRES       LESSOR     :    LAFOURCHE REALTY COMPANY
       11.95100   LESSOR ID  :
                  LESSEE     :    TEXAS GAS EXPLORATION CORPORATION
                  PROSPECT   :    LAKE ENFERMER


                                   EFFECTIVE             CURRENT RECORDING
 PROPERTY NO     LEASE DATE          DATE            BOOK     PAGE      ENTRY

01-0003268-001    06/13/1975      06/13/1975          543      479     408667
GROSS ACRES       LESSOR     :    HUGH C MCNEIL
       160.00000  LESSOR ID  :
                  LESSEE     :    MCMORAN EXPLORATION COMPANY
                  PROSPECT   :    LAKE ENFERMER


                                   EFFECTIVE             CURRENT RECORDING
 PROPERTY NO     LEASE DATE          DATE            BOOK     PAGE      ENTRY

01-0003268-002    06/13/1975      06/13/1975          543      475     408666
GROSS ACRES       LESSOR     :    GRACE WELD COLBY
       160.00000  LESSOR ID  :
                  LESSEE     :    MCMORAN EXPLORATION COMPANY
                  PROSPECT   :    LAKE ENFERMER
<PAGE>
 
                                   EXHIBIT A
                                                                    Page 5 of 64

                               COVERING LANDS IN
                     LAFOURCHE PARISH, STATE OF LOUISIANA

================================================================================

                                   EFFECTIVE             CURRENT RECORDING
 PROPERTY NO     LEASE DATE          DATE            BOOK     PAGE      ENTRY 

01-0003271-001    03/26/1975      03/26/1975          537      869     404483
GROSS ACRES       LESSOR     :    LAFOURCHE REALTY COMPANY
       71.59400   LESSOR ID  :
                  LESSEE     :    MCMORAN EXPLORATION COMPANY
                  PROSPECT   :    LAKE ENFERMER
<PAGE>
 
                                   EXHIBIT A
                                                                    Page 6 of 64

                               COVERING LANDS IN
                     LAFOURCHE PARISH, STATE OF LOUISIANA

================================================================================

                                   EFFECTIVE             CURRENT RECORDING
 PROPERTY NO     LEASE DATE          DATE            BOOK     PAGE      ENTRY 

01-0001542-001    04/01/1974      04/01/1974          602      365     452164
GROSS ACRES       LESSOR     :    LAFOURCHE REALTY COMPANY
       9.96000    LESSOR ID  :
                  LESSEE     :    TEXAS GAS EXPLORATION CORPORATION
                  PROSPECT   :    LAKE ENFERMER


                                   EFFECTIVE             CURRENT RECORDING
 PROPERTY NO     LEASE DATE          DATE            BOOK     PAGE      ENTRY

01-0003270-001    03/18/1974      03/18/1974          510      706     385730
GROSS ACRES       LESSOR     :    RUTH DEXTER CLOW ET AL
       160.00000  LESSOR ID  :
                  LESSEE     :    XPO INC
                  PROSPECT   :    LAKE ENFERMER
<PAGE>
 
                                   EXHIBIT A
                                                                    Page 7 of 64

                               COVERING LANDS IN
                     LAFOURCHE PARISH, STATE OF LOUISIANA

================================================================================

                                   EFFECTIVE             CURRENT RECORDING
 PROPERTY NO     LEASE DATE          DATE            BOOK     PAGE      ENTRY 

01-0003272-001    09/04/1981      09/04/1981          749      279     548650
GROSS ACRES       LESSOR     :    LAFOURCHE REALTY COMPANY INC.
       137.59900  LESSOR ID  :
                  LESSEE     :    TEXAS GAS EXPLORATION CORPORATION
                  PROSPECT   :    LAKE ENFERMER


                                   EFFECTIVE             CURRENT RECORDING
 PROPERTY NO     LEASE DATE          DATE            BOOK     PAGE      ENTRY

01-0003273-001    03/29/1983      03/29/1983          824      679     585751
GROSS ACRES       LESSOR     :    DELMAR D KNOWLES SR
       160.00000  LESSOR ID  :
                  LESSEE     :    TEXAS GAS EXPLORATION CORPORATION
                  PROSPECT   :    LAKE ENFERMER


                                   EFFECTIVE             CURRENT RECORDING
 PROPERTY NO     LEASE DATE          DATE            BOOK     PAGE      ENTRY

01-0003273-002    03/29/1983      03/29/1983          824      613     585730
GROSS ACRES       LESSOR     :    AUDREY E KNOWLES ET AL
       160.00000  LESSOR ID  :
                  LESSEE     :    TEXAS GAS EXPLORATION CORPORATION
                  PROSPECT   :    LAKE ENFERMER
<PAGE>
 
                                   EXHIBIT A
                                                                    Page 8 of 64


       WELL NAME                                           PARISH/STATE
       ---------                                           ------------
 
Lafourche Realty Co. #8 Lower CIB CARST                 Lafourche/Louisiana
Ruth D. Clow #2 T-1 SD SEG I                            Lafourche/Louisiana
Ruth D. Clow #1 V-3 SD SEG I                            Lafourche/Louisiana
Ruth D. Clow #2 V-2 SD SEG I                            Lafourche/Louisiana
Ruth D. Clow #2 T-7 SD SEG I                            Lafourche/Louisiana
Ruth D. Clow #2 S-2 SD SEG I                            Lafourche/Louisiana
Ruth D. Clow #2 T SD                                    Lafourche/Louisiana
Ruth D. Clow #2 T-3 SD                                  Lafourche/Louisiana
Ruth D. Clow #2 T-5 SD                                  Lafourche/Louisiana
Ruth D. Clow #3 CIB CARST                               Lafourche/Louisiana
Ruth D. Clow #3 V-2 SD SEG I                            Lafourche/Louisiana
Lafourche Realty Co. #A2 V-2 RD SUA                     Lafourche/Louisiana
Lafourche Realty Co. #A2 V-3 SD SEG III                 Lafourche/Louisiana
Lafourche Realty Co. #B2 T-7 SD SEG III                 Lafourche/Louisiana
Lafourche Realty Co. #B2 R RA SUA                       Lafourche/Louisiana
Lafourche Realty Co. #B2D S-2 SD SEG II                 Lafourche/Louisiana
Lafourche Realty Co. #B2D T-1 SD SEG II                 Lafourche/Louisiana
H.C. McNeil #6 T-1 SD SEG I                             Lafourche/Louisiana
H.C. McNeil #6D R SD SEG I                              Lafourche/Louisiana 
<PAGE>
 
                                   EXHIBIT A
                                                                    Page 9 of 64

                               COVERING LANDS IN
                     LAFOURCHE PARISH, STATE OF LOUISIANA

================================================================================

                                   EFFECTIVE             CURRENT RECORDING
 PROPERTY NO     LEASE DATE          DATE            BOOK     PAGE      ENTRY 

1-0001156-001    09/25/1972       09/25/1972          508      249     383445
GROSS ACRES      LESSOR      :    WILLIAM H HARRISON, ET AL
       82.44000  LESSOR ID   :
                 LESSEE      :    LYNAL EXPLORATION COMPANY
                 PROSPECT    :    LAKE ENFERMER


                                   EFFECTIVE             CURRENT RECORDING
 PROPERTY NO     LEASE DATE          DATE            BOOK     PAGE      ENTRY 

1-0001441-001    08/30/1972       08/30/1972          554      533     416550
GROSS ACRES      LESSOR      :    LAFOURCHE REALTY COMPANY
       64.99600  LESSOR ID   :
                 LESSEE      :    ROBERT A CHENOWITH
                 PROSPECT    :    LAKE ENFERMER


     RESERVATION AND EXCEPTION:

     LESS AND EXCEPT THOSE PORTIONS OF THE ABOVE LEASES TO THE EXTENT THAT SUCH
     LEASES ARE SITUATED WITHIN THE SURFACE BOUNDARIES OF THE H SAND, RESERVOIR
     A, IN THE LAKE ENFERMER FIELD, LAFOURCHE PARISH, LOUISIANA, AS ESTABLISHED
     BY LOUISIANA OFFICE OF CONSERVATION ORDER NUMBER 340-A DATED JUNE 24, 1974,
     EFFECTIVE MAY 9, 1974 RECORDED IN COB 518, FOLIO 112 UNDER ENTRY NO.
     390257; AND

     LESS AND EXCEPT THOSE PORTIONS OF THE ABOVE LEASES TO THE EXTENT THAT SUCH
     LEASES ARE SITUATED WITHIN THE SURFACE BOUNDARIES OF THE I RA SUA RESERVOIR
     A, IN THE LAKE ENFERMER FIELD, LAFOURCHE PARISH, LOUISIANA, AS ESTABLISHED
     BY LOUISIANA OFFICE OF CONSERVATION ORDER NUMBER 340-B DATED JUNE 4, 1974,
     EFFECTIVE MAY 9, 1974 RECORDED IN COB 518, FOLIO 116 UNDER ENTRY NO.
     390258.
<PAGE>
 
                                   EXHIBIT A
                                                                   Page 10 of 64

                               COVERING LANDS IN
                     LAFOURCHE PARISH, STATE OF LOUISIANA

================================================================================

                                   EFFECTIVE             CURRENT RECORDING
 PROPERTY NO     LEASE DATE          DATE            BOOK     PAGE      ENTRY 

01-0001441-001    08/30/1972      08/30/1972          554      533     416550
GROSS ACRES       LESSOR     :    LAFOURCHE REALTY COMPANY
       64.99600   LESSOR ID  :
                  LESSEE     :    ROBERT A CHENOWETH
                  PROSPECT   :    LAKE ENFERMER


                                   EFFECTIVE             CURRENT RECORDING
 PROPERTY NO     LEASE DATE          DATE            BOOK     PAGE      ENTRY 

01-0001538-001    11/24/1973      11/24/1973          506      250     382127
GROSS ACRES       LESSOR     :    LAFOURCHE REALTY COMPANY
       0.48200    LESSOR ID  :
                  LESSEE     :    LYNAL EXPLORATION COMPANY
                  PROSPECT   :    LAKE ENFERMER


                                   EFFECTIVE             CURRENT RECORDING
 PROPERTY NO     LEASE DATE          DATE            BOOK     PAGE      ENTRY 

01-0002032-001    08/30/1980      08/30/1980          711      616     527528
GROSS ACRES       LESSOR     :    LAFOURCHE REALTY COMPANY
       20.62600   LESSOR ID  :
                  LESSEE     :    TEXAS GAS EXPLORATION CORPORATION
                  PROSPECT   :    LAKE ENFERMER


                                   EFFECTIVE             CURRENT RECORDING
 PROPERTY NO     LEASE DATE          DATE            BOOK     PAGE      ENTRY 

01-0002332-001    11/26/1978      11/26/1978          642      626     480876
GROSS ACRES       LESSOR     :    HAROLD J POTTER ET AL
       20.00000   LESSOR ID  :
                  LESSEE     :    TEXAS GAS EXPLORATION CORPORATION
                  PROSPECT   :    LAKE ENFERMER
<PAGE>
 
                                   EXHIBIT A
                                                                   Page 11 of 64

                               COVERING LANDS IN
                     LAFOURCHE PARISH, STATE OF LOUISIANA

================================================================================

                                   EFFECTIVE             CURRENT RECORDING
 PROPERTY NO     LEASE DATE          DATE            BOOK     PAGE      ENTRY  

01-0002332-002    11/26/1978      11/26/1978          642      630     480877
GROSS ACRES       LESSOR     :    ROBERT J NEWELL
       20.00000   LESSOR ID  :
                  LESSEE     :    TEXAS GAS EXPLORATION CORPORATION
                  PROSPECT   :    LAKE ENFERMER



                                   EFFECTIVE             CURRENT RECORDING
 PROPERTY NO     LEASE DATE          DATE            BOOK     PAGE      ENTRY 

01-0002332-003    11/26/1978      11/26/1978          642      634     480878
GROSS ACRES       LESSOR     :    DONNA NEWELL WICHSER
       20.00000   LESSOR ID  :
                  LESSEE     :    TEXAS GAS EXPLORATION CORPORATION
                  PROSPECT   :    LAKE ENFERMER


                                   EFFECTIVE             CURRENT RECORDING
 PROPERTY NO     LEASE DATE          DATE            BOOK     PAGE      ENTRY 

01-002333-001    02/06/1979      02/06/1979           642      618     480874
GROSS ACRES      LESSOR     :    HUGH C MCNEIL, ET AL
       20.00000  LESSOR ID  :
                 LESSEE     :    TEXAS GAS EXPLORATION CORPORATION
                 PROSPECT   :    LAKE ENFERMER


                                   EFFECTIVE             CURRENT RECORDING
 PROPERTY NO     LEASE DATE          DATE            BOOK     PAGE      ENTRY 

01-0002333-002    01/17/1979      01/17/1979          642      622     480875
GROSS ACRES       LESSOR     :    GRACE WELD COLBY, ET AL
       20.00000   LESSOR ID  :
                  LESSEE     :    TEXAS GAS EXPLORATION CORPORATION
                  PROSPECT   :    LAKE ENFERMER
<PAGE>
 
                                  EXHIBIT A 
                                                                   Page 12 of 64

                               COVERING LANDS IN
                     LAFOURCHE PARISH, STATE OF LOUISIANA

================================================================================

                                   EFFECTIVE             CURRENT RECORDING
 PROPERTY NO     LEASE DATE          DATE            BOOK     PAGE      ENTRY  

01-0002367-001    11/21/1978      11/21/1978          642      602     480870
GROSS ACRES       LESSOR     :    ADRIENNE F FABER
       80.00000   LESSOR ID  :
                  LESSEE     :    TEXAS GAS EXPLORATION CORPORATION
                  PROSPECT   :    LAKE ENFERMER


                                   EFFECTIVE             CURRENT RECORDING
 PROPERTY NO     LEASE DATE          DATE            BOOK     PAGE      ENTRY 

01-0002367-002    11/21/1978      11/21/1978          642      606     480871
GROSS ACRES       LESSOR     :    JUNE R CLAUSE
       80.00000   LESSOR ID  :
                  LESSEE     :    GAS EXPLORATION CORPORATION
                  PROSPECT   :    LAKE ENFERMER


                                   EFFECTIVE             CURRENT RECORDING
 PROPERTY NO     LEASE DATE          DATE            BOOK     PAGE      ENTRY 

01-0002367-003    11/25/1978      11/25/1978          642      610     480872
GROSS ACRES       LESSOR     :    DR L PENFIELD FABER
       80.00000   LESSOR ID  :
                  LESSEE     :    TEXAS GAS EXPLORATION CORPORATION
                  PROSPECT   :    LAKE ENFERMER


                                   EFFECTIVE             CURRENT RECORDING
 PROPERTY NO     LEASE DATE          DATE            BOOK     PAGE      ENTRY 

01-0002367-004    11/21/1978      11/21/1978          642      614     480873
GROSS ACRES       LESSOR     :    THOMAS L FASSETT ET AL
       80.00000   LESSOR ID  :
                  LESSEE     :    TEXAS GAS EXPLORATION CORPORATION
                  PROSPECT   :    LAKE ENFERMER
<PAGE>
 
                                   EXHIBIT A
                                                                   Page 13 of 64

                               COVERING LANDS IN
                     LAFOURCHE PARISH, STATE OF LOUISIANA

================================================================================

                                   EFFECTIVE             CURRENT RECORDING
 PROPERTY NO     LEASE DATE          DATE            BOOK     PAGE      ENTRY  

01-0002536-001    11/27/1978      11/27/1978          645        1     482083
GROSS ACRES       LESSOR     :    PAUL A DOTY
       32.43100   LESSOR ID  :
                  LESSEE     :    TEXAS GAS EXPLORATION CORPORATION
                  PROSPECT   :    LAKE ENFERMER


                                   EFFECTIVE             CURRENT RECORDING
 PROPERTY NO     LEASE DATE          DATE            BOOK     PAGE      ENTRY 

01-0002536-002    11/27/1978      11/27/1978          645       17     482087
GROSS ACRES       LESSOR     :    MARIAN DOTY GEHLMANN
       80.00000   LESSOR ID  :
                  LESSEE     :    TEXAS GAS EXPLORATION CORPORATION
                  PROSPECT   :    LAKE ENFERMER


                                   EFFECTIVE             CURRENT RECORDING
 PROPERTY NO     LEASE DATE          DATE            BOOK     PAGE      ENTRY 

01-0002536-003    11/27/1978      11/27/1978          645       13     482086
GROSS ACRES       LESSOR     :    DONALD R DOTY
       80.00000   LESSOR ID  :
                  LESSEE     :    TEXAS GAS EXPLORATION CORPORATION
                  PROSPECT   :    LAKE ENFERMER


                                   EFFECTIVE             CURRENT RECORDING
 PROPERTY NO     LEASE DATE          DATE            BOOK     PAGE      ENTRY 

01-0002536-004    11/27/1978      11/27/1978          645        5     482084
GROSS ACRES       LESSOR     :    HELEN G DOTY ET AL
       80.00000   LESSOR ID  :
                  LESSEE     :    TEXAS GAS EXPLORATION CORPORATION
                  PROSPECT   :    LAKE ENFERMER
<PAGE>
 
                                   EXHIBIT A
                                                                   Page 14 of 64

                               COVERING LANDS IN
                     LAFOURCHE PARISH, STATE OF LOUISIANA

================================================================================

                                   EFFECTIVE             CURRENT RECORDING
 PROPERTY NO     LEASE DATE          DATE            BOOK     PAGE      ENTRY 

01-0002536-005    11/27/1978      11/27/1978          645        9     482085
GROSS ACRES       LESSOR     :    ROXANN F RHEA
       80.00000   LESSOR ID  :
                  LESSEE     :    TEXAS GAS EXPLORATION CORPORATION
                  PROSPECT   :    LAKE ENFERMER


                                   EFFECTIVE             CURRENT RECORDING
 PROPERTY NO     LEASE DATE          DATE            BOOK     PAGE      ENTRY 

01-0003265-001    11/24/1982      11/24/1982          798       65     573212
GROSS ACRES       LESSOR     :    LAFOURCHE REALTY COMPANY INC
       37.00700   LESSOR ID  :
                  LESSEE     :    TEXAS GAS EXPLORATION CORPORATION
                  PROSPECT   :    LAKE ENFERMER


                                   EFFECTIVE             CURRENT RECORDING
 PROPERTY NO     LEASE DATE          DATE            BOOK     PAGE      ENTRY 

01-0003267-001    06/10/1982      06/10/1982          782      801     566560
GROSS ACRES       LESSOR     :    LAFOURCHE REALTY COMPANY INC
       1.92200    LESSOR ID  :
                  LESSEE     :    TEXAS GAS EXPLORATION CORPORATION
                  PROSPECT   :    LAKE ENFERMER


                                   EFFECTIVE             CURRENT RECORDING
 PROPERTY NO     LEASE DATE          DATE            BOOK     PAGE      ENTRY 

01-0006385-001    11/01/1986      11/01/1986          990      446     669883
GROSS ACRES       LESSOR     :    LAFOURCHE REALTY COMPANY INC
       39.48900   LESSOR ID  :
                  LESSEE     :    CSX OIL & GAS CORPORATION
                  PROSPECT   :    LAKE ENFERMER
<PAGE>
 
                                   EXHIBIT A
                                                                   Page 15 of 64

                               COVERING LANDS IN
                     LAFOURCHE PARISH, STATE OF LOUISIANA

================================================================================

                                   EFFECTIVE             CURRENT RECORDING
 PROPERTY NO     LEASE DATE          DATE            BOOK     PAGE      ENTRY 

01-0006413-001    02/01/1987      02/01/1987          992      538     670646
GROSS ACRES       LESSOR     :    LAFOURCHE REALTY COMPANY INC
       1.47700    LESSOR ID  :
                  LESSEE     :    CSX OIL & GAS CORPORATION
                  PROSPECT   :    LAKE ENFERMER


                                   EFFECTIVE             CURRENT RECORDING
 PROPERTY NO     LEASE DATE          DATE            BOOK     PAGE      ENTRY 

01-5240702-001    07/15/1992      07/15/1992         1151      608     741660
GROSS ACRES       LESSOR     :    ROBERT J NEWELL
       20.00000   LESSOR ID  :
                  LESSEE     :    TOTAL MINATOME CORPORATION
                  PROSPECT   :    LAKE ENFERMER


                                   EFFECTIVE             CURRENT RECORDING
 PROPERTY NO     LEASE DATE          DATE            BOOK     PAGE      ENTRY 

01-5240702-002    07/15/1992      07/15/1992         1152      335     741865
GROSS ACRES       LESSOR     :    RUTH HOLLISTON SANDERS
       20.00000   LESSOR ID  :
                  LESSEE     :    TOTAL MINATOME CORPORATION
                  PROSPECT   :    LAKE ENFERMER


                                   EFFECTIVE             CURRENT RECORDING
 PROPERTY NO     LEASE DATE          DATE            BOOK     PAGE      ENTRY 

01-5240708-001    07/15/1992      07/15/1992         1151      746     741711
GROSS ACRES       LESSOR     :    THE ELLEN LUCY MCHUGH TRUST
       20.00000   LESSOR ID  :
                  LESSEE     :    TOTAL MINATOME CORPORATION
                  PROSPECT   :    LAKE ENFERMER
<PAGE>
 
                                   EXHIBIT A
                                                                   Page 16 of 64

                               COVERING LANDS IN
                     LAFOURCHE PARISH, STATE OF LOUISIANA

================================================================================

                                   EFFECTIVE             CURRENT RECORDING
 PROPERTY NO     LEASE DATE          DATE            BOOK     PAGE      ENTRY 

01-5240709-001    07/15/1992      07/15/1992         1152      331     741864
GROSS ACRES       LESSOR     :    JANICE DOTY HALL
       80.00000   LESSOR ID  :
                  LESSEE     :    TOTAL MINATOME CORPORATION
                  PROSPECT   :    LAKE ENFERMER


                                   EFFECTIVE             CURRENT RECORDING
 PROPERTY NO     LEASE DATE          DATE            BOOK     PAGE      ENTRY 

01-5240709-002    07/15/1992      07/15/1992         1152      339     741866
GROSS ACRES       LESSOR     :    KARL GEHLMANN
       80.00000   LESSOR ID  :
                  LESSEE     :    TOTAL MINATOME CORPORATION
                  PROSPECT   :    LAKE ENFERMER
<PAGE>
 
                                   EXHIBIT A
                                                                   Page 17 of 64

                               COVERING LANDS IN
                     LAFOURCHE PARISH, STATE OF LOUISIANA

================================================================================

                                   EFFECTIVE             CURRENT RECORDING
 PROPERTY NO     LEASE DATE          DATE            BOOK     PAGE      ENTRY 

                 01-01/1992
LESSOR      :    LAFOURCHE REALTY COMPANY INC
LESSEE      :    TOTAL MINATOME CORPORATION
PROSPECT    :    LAKE ENFERMER

LAFOURCHE REALTY COMPANY, INC. LANDS SITUATED IN LAFOURCHE PARISH, LOUISIANA AND
DESCRIBED AS FOLLOWS, TO-WIT:

12.187 acres, more or less, situated in Sections 7 and 18 of Township 20 South,
Range 23 East and being more particularly described by metes and bounds as
follows:

     Beginning at a point along the intersection of the T-1 RA SUA
     and the R RA SUA having Lambert coordinates
     x = 2,372,047.33                                                    
     y = 251,372.78                                                      
     thence northwest along the T-1 RA SUA N66d11'9"W 107.58'            
     thence S85d06'05"W 286 84'                                          
     thence S44d55'87"W 136.89'                                          
     thence S26d12'00"W 210.64'                                          
     thence S15d03'42"W 311.71'                                          
     thence S10d21'12"W 422.08'                                          
     thence S06d27'01"W 832.00'                                          
     thence S01d58'64"W 632.39'                                          
     thence S00d46'13"E 685.05'                                          
     thence S05d48'02"E 608.05'                                          
     to a point along the intersection of the T-1 RA SUA                 
     and the R RA SUA                                                    
     x = 2,371,245.57                                                    
     y = 247,982.78                                                      
     thence northwest along the R RA SUA N11d 31'18"W 208.06'            
     thence N08d58'24"W 553.30'                                          
     thence N06d37'31"W 526.10'                                          
     thence N02d08'24"E 582.30'                                          
     thence N06d11'81"E 842.83'                                          
     thence N02d19'04"E 420.34'                                          
     thence N09d48'87"E 147.14'                                          
     thence N14d37'15"E 118.85'                                          
     thence N32d16'32"E 112.36'                                          
     thence N52d35'41"E 107.00'                                          
     thence N66d 48'05"E 114.23'                                         
     thence N80d54'35"E 126.59'                                          
     thence S76d30'15"E 128.55'                                          
     thence S65d51'16"E 158.90'                                          
     thence S58d114'46"E 182.87'                                         
     to the Point of Beginning 
<PAGE>
 
                                   EXHIBIT A
                                                                   Page 18 of 64


THE NOMENCLATURE FOR THE UNITS MENTIONED IN THE ABOVE METES AND BOUNDS ARE MORE
PARTICULARLY DESCRIBED AS FOLLOWS:

R RA SUA ESTABLISHED BY LOUISIANA OFFICE OF CONSERVATION ORDER NO. 340-P-3,
DATED OCTOBER 18, 1983, EFFECTIVE AUGUST 30, 1983, RECORDED COB 840, FOLIO -,
ENTRY NO. 593064.

T-1 RA SUA ESTABLISHED BY LOUISIANA OFFICE OF CONSERVATION ORDER NO. 340-Q-2,
DATED OCTOBER 18, 1983, EFFECTIVE AUGUST 30, 1983, RECORDED COB 840, FOLIO -,
ENTRY NO. 593062.
<PAGE>
 
                                   EXHIBIT A
                                                                   Page 19 of 64

                               COVERING LANDS IN
                     LAFOURCHE PARISH, STATE OF LOUISIANA

================================================================================

LAFOURCHE REALTY COMPANY, INC. LANDS SITUATED IN LAFOURCHE PARISH, LOUISIANA AND
DESCRIBED AS FOLLOWS TO-WIT:

ALL THE LANDS WHICH LIE WITHIN THE R RB SUA UNIT AS ESTABLISHED BY THE LOUISIANA
OFFICE OF CONSERVATION ORDER NO. 340-P-3 EFFECTIVE AUGUST 30, 1983, RECORDED IN
BOOK 840, ENTRY NO. 593064, LAFOURCHE PARISH, LOUISIANA, BUT LIE OUTSIDE THE T-1
RB SUA UNIT ESTABLISHED BY THE LOUISIANA OFFICE OF CONSERVATION ORDER NO. 340-Q-
1, EFFECTIVE JUNE 17, 1981, RECORDED IN BOOK 754, FOLIO 341, ENTRY NO. 551518,
LAFOURCHE PARISH, LOUISIANA.
<PAGE>
 
                                  EXHIBIT A 
                                                                   Page 20 of 64

                               COVERING LANDS IN
                     LAFOURCHE PARISH, STATE OF LOUISIANA

================================================================================

                                   EFFECTIVE             CURRENT RECORDING
 PROPERTY NO     LEASE DATE          DATE            BOOK     PAGE      ENTRY 

                 01/01/1992
LESSOR       :   LAFOURCHE REALTY COMPANY INC.
LESSEE       :   TOTAL MINATOME CORPORATION
PROSPECT     :   LAKE ENFERMER

LAFOURCHE REALTY COMPANY, INC. LANDS SITUATED IN LAFOURCHE PARISH,
LOUISIANA AND DESCRIBED AS FOLLOWS TO-WIT:
 
TRACT 1:   2.122 acres, more or less, situated in Section 19, Township 20 South,
-------    Range 23 East, and being more particularly described by metes and
           bounds as follows:

Beginning at a point along the intersection of V-3 RD SU A and
V 2 RO SU A having Lambert coordinates
x = 2,378,160.00
y = 243,410.00
thence Southwest along the V-2 RD SU A S13d23'33"E 215.87
thence S08d06'25"E 263.10
thence S03d10'47"E 180.28
thence S07d07'30"W 241.87' to a point along the intersection of the V-2 RD SU A
and the V-3 RD SU A having Lambert coordinates
x = 2,378,220.00
y = 242,630.00
thence Northeast along the V-3 RD SU A N00d00'02"E 270.00'
thence N06d32'47"W 614.00' to the point of beginning.

TRACT 2:   .458 acres, more or less, situated in Section 20, Township 20 South,
-------    Range 23 East, and being more particularly described by metes and
           bounds as follows:

Beginning at a point along the intersection of the V-3 RD SU A and
the V-2 RD SU A having Lambert coordinates
x = 2,374,776.92
y = 240,647.10
thence Southwest along the V-3 RD SU A S01d19'34"W 566.03' to the intersection
of the V-2 RD SU A and the V-3 RD SU A having Lambert coordinates
x = 2,374,763.85
y = 240,082.22
thence Northwestward along the V-2 RD SU A N83'd59'28"W 328.35'
to a point having Lambert coordinates
x = 2,374,437.31
y = 240,116.89
thence Northeast N02d37'35"W 629.91' to the point of beginning

THE NOMENCLATURE FOR THE UNITS MENTIONED IN THE ABOVE METES AND BOUNDS
DESCRIPTION ARE MORE PARTICULARLY DESCRIBED AS FOLLOWS:

V-2 RD SUA ESTABLISHED BY LOUISIANA OFFICE OF CONSERVATION ORDER NO. 340-T-4,
DATED JULY 1985, EFFECTIVE MAY 7, 1985, RECORDED COB 918, FOLIO 756, ENTRY NO.
631920, RECORDS LAFOURCHE PARISH, LOUISIANA.
<PAGE>
 
                                   EXHIBIT A
                                                                   Page 21 of 64


V-3 RD SUA ESTABLISHED BY LOUISIANA OFFICE OF CONSERVATION ORDER NO. 340-S-4,
DATED JULY 1985, EFFECTIVE MAY 7, 1985, RECORDED COB 918, FOLIO 760, ENTRY NO.
631921, RECORDS LAFOURCHE PARISH, LOUISIANA.
<PAGE>
 
                                   EXHIBIT A
                                                                   Page 22 of 64


     WELL NAME                                      PARISH/STATE
     ---------                                      ------------
 
Harrison #3 L RA SUA                            Lafourche/Louisiana    
Harrison #4 ALT L RA SUA                        Lafourche/Louisiana    
Harrison #4 L RA SUA                            Lafourche/Louisiana    
Harrison #4D UL RA SUA                          Lafourche/Louisiana    
Lafourche Realty Co. #3 0-2 RA                  Lafourche/Louisiana    
Lafourche Realty Co. #4 D-1 RA SUA              Lafourche/Louisiana    
Lafourche Realty Co. #4D C-2 RA                 Lafourche/Louisiana    
Lafourche Realty Co. #7 V-3 SD SEG II           Lafourche/Louisiana    
Lafourche Realty Co. #7 V-2 SD SEG II           Lafourche/Louisiana    
Lafourche Realty Co. #8 V-4 SD                  Lafourche/Louisiana    
Lafourche Realty Co. #8 T-7 RC SUA              Lafourche/Louisiana    
Lafourche Realty Co. #8 T-8 SD                  Lafourche/Louisiana     
<PAGE>
 
                                   EXHIBIT A
                                                                   Page 23 of 64

                               COVERING LANDS IN
                     LAFOURCHE PARISH, STATE OF LOUISIANA

================================================================================

                                   EFFECTIVE             CURRENT RECORDING
 PROPERTY NO     LEASE DATE          DATE            BOOK     PAGE      ENTRY 

01-0001328-001    12/18/1972      12/18/1972          483      510     363827
GROSS ACRES       LESSOR     :    STATE OF LOUISIANA
       200.03500  LESSOR ID  :    6024
                  LESSEE     :    LYNAL EXPLORATION COMPANY
                  PROSPECT   :    LAKE ENFERMER


                                   EFFECTIVE             CURRENT RECORDING
 PROPERTY NO     LEASE DATE          DATE            BOOK     PAGE      ENTRY 

01-0001535-001    05/13/1974      05/13/1974          514      581     388122
GROSS ACRES       LESSOR     :    STATE OF LOUISIANA
       1.58700    LESSOR ID  :    6301
                  LESSEE     :    TEXAS GAS EXPLORATION CORPORATION
                                  ET AL
                  PROSPECT   :    LAKE ENFERMER

     RESERVATION AND EXCEPTION:

     LESS AND EXCEPT THOSE PORTIONS OF THE ABOVE LOUISIANA STATE LEASES TO THE
     EXTENT THAT SUCH LEASES ARE SITUATED WITHIN THE SURFACE BOUNDARIES OF THE
     UPPER L SAND, RESERVOIR A, IN THE LAKE ENFERMER FIELD, LAFOURCHE PARISH,
     LOUISIANA, AS ESTABLISHED BY LOUISIANA OFFICE OF CONSERVATION ORDER NUMBER
     340-K DATED MARCH 4, 1976, EFFECTIVE MARCH 1, 1976 RECORDED IN COB 560,
     FOLIO 83__ UNDER ENTRY NO. 421706.
<PAGE>
 
                                   EXHIBIT A
                                                                   Page 24 of 64

                               COVERING LANDS IN
                     LAFOURCHE PARISH, STATE OF LOUISIANA

================================================================================

                                   EFFECTIVE             CURRENT RECORDING
 PROPERTY NO     LEASE DATE          DATE            BOOK     PAGE      ENTRY 

01-0002707-001    11/19/1979      11/19/1979          685      663     511082
GROSS ACRES       LESSOR     :    STATE OF LOUISIANA
       110.29500  LESSOR ID  :    8403
                  LESSEE     :    S W PLAUCHE' III
                  PROSPECT   :    LAKE ENFERMER


                                   EFFECTIVE             CURRENT RECORDING
 PROPERTY NO     LEASE DATE          DATE            BOOK     PAGE      ENTRY 

01-0001156-001    09/25/1972      09/25/1972          508      249     383445
GROSS ACRES       LESSOR     :    WILLIAM H HARRISON, ET AL
       82.44000   LESSOR ID  :
                  LESSEE     :    LYNAL EXPLORATION COMPANY
                  PROSPECT   :    LAKE ENFERMER


                                   EFFECTIVE             CURRENT RECORDING
 PROPERTY NO     LEASE DATE          DATE            BOOK     PAGE      ENTRY 

01-0001441-001    08/30/1972      08/30/1972          554      533     416550
GROSS ACRES       LESSOR     :    LAFOURCHE REALTY COMPANY
       64.99600   LESSOR ID  :
                  LESSEE     :    ROBERT A CHENOWETH
                  PROSPECT   :    LAKE ENFERMER


                                   EFFECTIVE             CURRENT RECORDING
 PROPERTY NO     LEASE DATE          DATE            BOOK     PAGE      ENTRY 

01-0003274-001    04/15/1984      04/15/1984          873      488     610333
GROSS ACRES       LESSOR     :    RICHARD JOSEPH HARRISON
       13.02525   LESSOR ID  :
                  LESSEE     :    KENNETH SAVAGE
                  PROSPECT   :    LAKE ENFERMER


                                   EFFECTIVE             CURRENT RECORDING
 PROPERTY NO     LEASE DATE          DATE            BOOK     PAGE      ENTRY 

01-0003274-002    04/15/1984      04/15/1984          873      440     610329
GROSS ACRES       LESSOR     :    SHIRLEY HARRISON HYDE
       13.02525   LESSOR ID  :
                  LESSEE     :    KENNETH SAVAGE
                  PROSPECT   :    LAKE ENFERMER
<PAGE>
 
                                   EXHIBIT A
                                                                   Page 25 of 64

                               COVERING LANDS IN
                     LAFOURCHE PARISH, STATE OF LOUISIANA

================================================================================

                                   EFFECTIVE             CURRENT RECORDING
 PROPERTY NO     LEASE DATE          DATE            BOOK     PAGE      ENTRY 

01-0003274-003    04/15/1984      04/15/1984          873      464     610331
GROSS ACRES       LESSOR     :    KATHERINE LORETTA HARRISON
       13.02525   LESSOR ID  :
                  LESSEE     :    KENNETH SAVAGE
                  PROSPECT   :    LAKE ENFERMER


                                   EFFECTIVE             CURRENT RECORDING
 PROPERTY NO     LEASE DATE          DATE            BOOK     PAGE      ENTRY 

01-0003274-004    04/15/1984      04/15/1984          873      476     610332
GROSS ACRES       LESSOR     :    LYDIA HARRISON RYAN
       13.02525   LESSOR ID  :
                  LESSEE     :    KENNETH SAVAGE
                  PROSPECT   :    LAKE ENFERMER


                                   EFFECTIVE             CURRENT RECORDING
 PROPERTY NO     LEASE DATE          DATE            BOOK     PAGE      ENTRY 

01-0003274-005    04/15/1984      04/15/1984          873      452     610330
GROSS ACRES       LESSOR     :    THE WILLIAM HARRISON JR FAMILY
                                  PROJECT
       13.02525   LESSOR ID  :
                  LESSEE     :    KENNETH SAVAGE
                  PROSPECT   :    LAKE ENFERMER


                                   EFFECTIVE             CURRENT RECORDING
 PROPERTY NO     LEASE DATE          DATE            BOOK     PAGE      ENTRY 

01-0005936-001    04/01/1986      04/01/1986          949      196     648110
GROSS ACRES       LESSOR     :    LYDIA HARRISON RYAN
       2.48700    LESSOR ID  :
                  LESSEE     :    KENNETH SAVAGE
                  PROSPECT   :    LAKE ENFERMER
<PAGE>
 
                                   EXHIBIT A
                                                                   Page 26 of 64

                               COVERING LANDS IN
                     LAFOURCHE PARISH, STATE OF LOUISIANA

================================================================================

                                   EFFECTIVE             CURRENT RECORDING
 PROPERTY NO     LEASE DATE          DATE            BOOK     PAGE      ENTRY 

01-0005936-002    04/01/1986      04/01/1986          949      184     648109
GROSS ACRES       LESSOR     :    THE WILLIAM HARRISON JR FAMILY
                                  PROJECT A PTNSHP
       2.48700    LESSOR ID  :
                  LESSEE     :    KENNETH SAVABE
                  PROSPECT   :    LAKE ENFERMER


                                   EFFECTIVE             CURRENT RECORDING
 PROPERTY NO     LEASE DATE          DATE            BOOK     PAGE      ENTRY 

01-0005936-003    04/01/1986      04/01/1986          949      172     648108
GROSS ACRES       LESSOR     :    SHIRLEY HARRISON HYDE
       2.48700    LESSOR ID  :
                  LESSEE     :    KENNETH SAVAGE
                  PROSPECT   :    LAKE ENFERMER


                                   EFFECTIVE             CURRENT RECORDING
 PROPERTY NO     LEASE DATE          DATE            BOOK     PAGE      ENTRY 

01-0005936-004    04/01/1986      04/01/1986          949      148     648106
GROSS ACRES       LESSOR     :    RICHARD JOSEPH HARRISON
       2.48700    LESSOR ID  :
                  LESSEE     :    KENNETH SAVAGE
                  PROSPECT   :    LAKE ENFERMER


                                   EFFECTIVE             CURRENT RECORDING
 PROPERTY NO     LEASE DATE          DATE            BOOK     PAGE      ENTRY 

01-0005936-005    04/01/1986      04/01/1986          949      160     648107
GROSS ACRES       LESSOR     :    KATHERINE LORETTA HARRISON
       2.48700    LESSOR ID  :
                  LESSEE     :    KENNETH SAVAGE
                  PROSPECT   :    LAKE ENFERMER

     RESERVATION AND EXCEPTION:

     LESS AND EXCEPT THOSE PORTIONS OF THE ABOVE LOUISIANA STATE LEASES TO THE
     EXTENT THAT SUCH LEASES ARE SITUATED WITHIN THE SURFACE BOUNDARIES OF THE
     UPPER L SAND, RESERVOIR A, IN THE LAKE ENFERMER FIELD, LAFOURCHE PARISH,
     LOUISIANA, AS ESTABLISHED BY LOUISIANA OFFICE OF CONSERVATION ORDER NUMBER
     340-K DATED MARCH 4, 1976, EFFECTIVE MARCH 1, 1976 RECORDED IN COB 560,
     FOLIO 830 UNDER ENTRY NO. 421706.
<PAGE>
 
                                   EXHIBIT A
                                                                   Page 27 of 64


     WELL NAME                                            PARISH/STATE
     ---------                                            ------------
 
Harrison #2 I RA SUA                                   Lafourche/Louisiana
Harrison #2D H RA                                      Lafourche/Louisiana
Harrison #5 H RC (well bore only)                      Lafourche/Louisiana
Harrison #6 ALT L-1 SD                                 Lafourche/Louisiana
Harrison #6 H-1 RB                                     Lafourche/Louisiana
Harrison #6 G-1 RA SUA                                 Lafourche/Louisiana
Harrison #6 H RA                                       Lafourche/Louisiana
Harrison #6D K SD                                      Lafourche/Louisiana
Lafourche Realty Co. #1 O RA                           Lafourche/Louisiana
Lafourche Realty Co. #1 M RA                           Lafourche/Louisiana
Lafourche Realty Co. #1 I RA SUA                       Lafourche/Louisiana
Lafourche Realty Co. #1D N RA                          Lafourche/Louisiana
Lafourche Realty Co. #2 H RB (well bore only)          Lafourche/Louisiana
Lafourche Realty Co. #2 ALT H-1 RA                     Lafourche/Louisiana
Lafourche Realty Co. #5 C-3 RA SUA (well bore only)    Lafourche/Louisiana
Lafourche Realty Co. #5 B RA (well bore only)          Lafourche/Louisiana
Lafourche Realty Co. #6 J SD (well bore only)          Lafourche/Louisiana
<PAGE>
 
                                   EXHIBIT A
                                                                   Page 28 of 64

                                     UNITS
                                     -----


1.  T-1 RB SUA as created by Louisiana Office of Conservation Order No. 340-Q-1
    effective June 17, 1981;

2.  R RA SU A as revised by Louisiana Office of Conservation Order No. 340-P-3
    effective August 30, 1983;

3.  T-7 RC SUA as created by Louisiana Office of Conservation Order No. 340-W
    effective August 30, 1983;

4.  V-2 RD SUA as created by Louisiana Office of Conservation Order No. 340-T-4
    effective May 7, 1985;

5.  R RB SU A as revised by Louisiana Office of Conservation Order No. 340-P-3
    effective August 30, 1983;

6.  Cib Carst RB SUA as created by Louisiana Office of Conservation Order No.
    340-U-1 effective October 23, 1984;

7.  L RA SUA as revised by Louisiana Office of Conservation Order No. 340-F-1
    effective March 1, 1976;

8.  T-1 RA SUA as revised by Louisiana Office of Conservation Order No. 340-Q-2
    effective August 30, 1983;

9.  H RA SUA as created by Louisiana Office of Conservation Order No. 340-A
    effective May 9, 1974;

10. I RA SUA as created by Louisiana Office of Conservation Order No. 340-B
    effective May 9, 1974.
<PAGE>
 
                                   EXHIBIT A
                                                                   Page 29 of 64


                                        WORKING             NET REVENUE    
EXHIBIT "A" & "A-2" WELLS               INTEREST             INTEREST    
-------------------------               --------            -----------  
                                                                       
#2 CLOW T-1 RB SUA                      .5964447             .4407330  
#B-2d LAFOURCHE REALTY R RA SUA         .5664751             .4274966  
#6-D HARRISON G                                                        
#2 CLOW T-1 UPPER                       .5654470             .4217100  
#8 LAFOURCHE T-7 RC SUA                 .8620380             .6165744  
#A-2 LAFOURCHE V-2                      .5352910             .4000000  
#6-D H.C. MCNEIL R-RB SUA               .5979900             .4471250  
#6-D HARRISON F                                                        
GRAHAM #8 LAFOURCHE CIB CARST           .0151260             .0121648  
#6-D MCNEIL R HIGHER                    .5979900             .4471250   


                                        WORKING             NET REVENUE    
EXHIBIT "A" & "A-2" WELLS               INTEREST             INTEREST    
-------------------------               --------            -----------  

#3 HARRISON L RA SUA                    .733750              .5466550
#4 HARRISON L RA SUA                    .733750              .5466550
<PAGE>
 
                                   EXHIBIT A
                                                                   Page 30 of 64

                    OIL, GAS AND MINERAL LEASES - LAFOURCHE
             CROSSING FIELD PROSPECT, LAFOURCHE PARISH, LOUISIANA


                                                              CONVEYANCE RECORDS
                                                                    OF LAFOURCHE
                                                               PARISH, LOUISIANA

LESSOR                                                  LEASE DATE    ENTRY NO.
 
Dixon H. Cain, et ux                                      04/01/89     697209
American Cancer Society, Louisiana Division, Inc.         04/01/89     700119
Roland von Kurnatowski                                    04/01/89     700120
Evelyn von Kurnatowski Benham                             04/01/89     700121
Clarence C. Clifton, Jr., et al                           04/01/89     700122
Mary Cobb Black                                           04/06/89     700123
Ethel L. McDermott, et als                                04/01/89     700124
Jean D. Babel, et vir                                     04/01/89     700125
Margaret D. Hunter, et vir                                04/01/89     700126
Louise Ash Smaizys                                        04/01/89     700127
B. William Payne, et als                                  04/01/89     700128
Clara Louise Hagge, et vir                                04/01/89     700129
W. Ridley Wheeler Estate                                  04/01/89     700130
Mary Jane Brown Courtney                                  04/27/89     700131
Lois Plummer Wachter                                      04/01/89     700132
B. Wendell Phillips, et ux                                04/01/89     700133
Viola Shenk Branton                                       04/01/89     700134
Judy Branton Wilkins                                      04/01/89     700135
Paul Shenk, Jr.                                           04/01/89     700136
May Ayo Peltier, et als                                   04/01/89     700137
Emilio Alfredo Martinez, et als                           04/01/89     700138
Nora Martinez Oliver                                      04/01/89     700139
Maria Martinez Bussmann                                   04/01/89     700140
First National Bank of Commerce, as Agent & 
 Atty-in-Fact for Berta Paulina Contreras, 
 Elvira Maria Contreras, and Maria de 
 Los Angeles Contreras                                    04/01/89     700141
Donald G. Robichaux, et ux                                04/01/89     700142
Donald G. Robichaux, et ux                                04/14/89     700143
Donald G. Robichaux, et ux                                04/01/89     700144
Lynn P. Thibodeaux, et ux                                 05/10/89     700145
Algy Irvin, Sr., et ux                                    05/10/89     700146
Emilio Alfredo Martinez, et als                           04/01/89     700147
Nora Martinez Oliver                                      04/01/89     700148
Maria Martinez Bussman                                    04/01/89     700149
First National Bank of Commerce, as Agent & 
 Atty-in-Fact for Berta Paulina Contreras, 
 Elvira Maria Contreras, and Maria de 
 Los Angeles Contreras                                    04/01/89     700150
Francis Dugas, et als                                     04/01/89     700151
Donald G. Robichaux, et ux                                04/01/89     700152
Emily Baudoin Eroche, et als                              04/01/89     700152
May Ayo Peltier, et als                                   04/01/89     700154
Hubert L. Brown, Jr.                                      06/23/89     700715
<PAGE>
 
                                   EXHIBIT A
                                                                   Page 31 of 64


                                                              CONVEYANCE RECORDS
                                                                    OF LAFOURCHE
                                                               PARISH, LOUISIANA


LESSOR                                                 LEASE DATE    ENTRY NO.
 
American Cancer Society, Louisiana Division, Inc.        03/15/84     603761
Louise Ash Smaizys                                       03/30/84     603762
Evelyn von Kurnatowski Benham                            03/30/84     603763
W. Ridley Wheeler Estate                                 03/30/84     604533
Clarence C. Clifton, Jr., et al                          03/30/84     604532
Roland von Kurnatowski                                   03/30/84     604534
Paul Shenk, Jr.                                          03/30/84     609218
Truman Branton                                           03/30/84     609220
B. Wendell Phillips, et ux                               03/30/84     609436
Clarebelle Housh                                         03/30/84     609219
Ethel L. McDermott, et als                               03/30/84     609221
Hibernia National Bank of New Orleans, Trustee for       04/13/84     609222
 Mireille Leibreton Cobb and Trustee for Mireille
 Lebreton Cobb and Mary Cobb Black
Lois Plummer Wachter                                     03/30/84     611323
Emilio Alfredo Martinez, et als                          01/01/84     603754
Dixon H. Cain, et ux                                     02/01/84     603769
Donald G. Robichaux, et ux                               02/01/84     603755
May Ayo Peltier, et als                                  02/01/84     603760
David J. Robichaux, et ux                                04/26/84     604581
Succession of Lupita Echeverria Martinez                 07/01/84     613853
Mary Jane Brown Courtney                                 01/01/85     624879
Hubert L. Brown, Jr.                                     02/15/85     625253
B. William Payne, et als                                 12/01/84     625254
Frances G. Thompson, et al                               12/01/84     625252
Clara Louise Hagge, et vir                               12/01/84     631753


     The above described leases INSOFAR AND ONLY INSOFAR as they cover the
following described property:

     That portion of the Brock Exploration Corporation, 10,180' RB SU A, L.
     Martinez No. 1, created by Conservation Department Order No. 63-J-1,
     effective June 25, 1985, recorded under Entry No. 631793, records of
     Lafourche Parish, Louisiana, falling within the Germany Operating Company,
     9,630' RA SU A, Matherne No. 1, created by Conservation Department Order
     No. 63-L, effective January 10, 1989, recorded under Entry No. 693985,
     records of Lafourche Parish, Louisiana, INSOFAR AND ONLY INSOFAR as the
     depth below the productive 9,630' zone, is concerned, and limited to one
     hundred feet (100') below the deepest producing horizon on or before 
     April 1, 1990. There is also expected herefrom, any and all production
     derived from the above mentioned Germany Operating Company, 9,630' RA SU A
     Matherne No. 1 Unit.

     The above described tract contains approximately 5,337 acres, more or less.
<PAGE>
 
                                   EXHIBIT A
                                                                   Page 32 of 64


                                                              CONVEYANCE RECORDS
                                                                    OF LAFOURCHE
                                                               PARISH, LOUISIANA


LESSOR                                                 LEASE DATE    ENTRY NO.
 
Sadie Fagot Peter, et als                                04/15/84     609215
A.G. Fagot                                               04/15/84     609216
Robert Fagot                                             04/15/84     609217
Wilfred C. Fagot                                         04/15/84     610888
Caryl C. Fagot, et als                                   11/01/85     641119 


     INSOFAR AND ONLY INSOFAR as the above leases covering the following
described property:

TRACT NO. 1:  A certain tract of land situated in Sections 133 and 134, Township
-----------   15 South, Range 17 East, Lafourche Parish, Louisiana, being more
              particularly described as follows: Beginning at the Northeast
              corner of Section 133 having Lambert Plane Coordinates
              X=2,185,757.27 and Y=389,661.91 go S1327'14"W along East line of
              section approximately 330', more or less, to the point of
              beginning, thence S1327; 14" W 4,000' along East line of Section
              133 to a point being the Southeast corner of said tract; thence at
              a right angle West-Northwest 1,600' to a point being the Southwest
              corner of said tract; thence N1322'40"E 4,000' to a point being
              the Northwest corner of said tract; thence East-Southeast 1,600'
              at an angle and bearing common to the South line of said tract to
              the point of beginning estimated to contain 146 acres, more or
              less. LESS AND EXCEPT: Approximately 18.5 acres, more or less,
              within the 9,630' RA SUA, Matherne No. 1, created by Department of
              Conservation Order No. 63-L, effective January 13, 1989, recorded
              under Entry No. 693985, records of Lafourche Parish, Louisiana.

The above described tract of land contains 127.5 acres, more or less.

TRACT NO. 2:  That portion of the Brock Exploration Corporation, 10,180' RB SU
-----------   A, L. Martinez No. 1, created by Conservation Department Order No.
              63-J-1, effective June 25, 1985, recorded under Entry No. 631793,
              records of Lafourche Parish, Louisiana, falling within the Germany
              Operating Company, 9630' RA SU A, Matherne No. 1, created by
              Conservation Department Order No. 63-L, effective January 10,
              1989, recorded under Entry No. 693985, records of Lafourche
              Parish, Louisiana, INSOFAR AND ONLY INSOFAR as the depth below the
              productive 9630' zone, is concerned.

There is expressly excepted herefrom, any and all production derived from the
above mentioned Germany Operating Company, 9630' RA SU A, Matherne No. 1 Unit.

The hereinabove described tract contains approximately 5.337 acres, more or
less.
<PAGE>
 
                                   EXHIBIT A
                                                                   Page 33 of 64


                                                              CONVEYANCE RECORDS
                                                                    OF LAFOURCHE
                                                               PARISH, LOUISIANA


LESSOR                                                 LEASE DATE    ENTRY NO.
 
Thompson Limited                                         08/01/89     702764
The Azby Fund, et al                                     08/25/89     702765
David J. Robichaux, Jr., et ux                           08/01/89     705190
David J. Robichaux, Jr., et ux                           08/01/89     705191
David J. Robichaux, Jr., et ux                           08/01/90     705189 


     INSOFAR AND ONLY INSOFAR AS TO THAT PORTION OF ALL OF THE OIL, GAS AND
MINERAL LEASES DESCRIBED ABOVE ARE INCLUDED WITHIN THE 9,850' RB SU A CREATED BY
THE LOUISIANA OFFICE OF CONSERVATION ORDER 63-E-1, RECORDED IN CONVEYANCE BOOK
1077, FOLIO 114, ENTRY NO. 710980, THE SURVEY PLAT OF SUCH UNIT BEING RECORDED
IN CONVEYANCE BOOK 1082, FOLIO 529, ENTRY NO. 713460, ALL IN THE RECORDS OF
LAFOURCHE PARISH, LOUISIANA AND INSOFAR AND ONLY INSOFAR AS THESE OIL, GAS AND
MINERAL LEASES COVER THE RIGHTS DOWN TO THE DEPTH OF 10,002 FEET BELOW THE
SURFACE OF THE EARTH.

     FORMAN PETROLEUM CORPORATION'S INTEREST:

          UNIT OPERATING INTEREST        15.000000%
          UNIT REVENUE INTEREST          11.313022%
<PAGE>
 
                                   EXHIBIT A
                                                                   Page 34 of 64

                                  EXHIBIT "A"
                                      TO
                                ACT OF MORTGAGE
                         FORMAN PETROLEUM CORPORATION
                                      TO
            JOINT ENERGY DEVELOPMENT INTERESTS LIMITED PARTNERSHIP


1. The following Exhibit "A" consists of Pages Nos. 1 through ___, inclusive.

2. The recording references in Exhibit "A", Pages 1-44 are the Conveyance
   Records of LaFourche Parish, Louisiana.

3. The recording references in Page 59 of Exhibit "A" are to the records of
   Terrebonne Parish, Louisiana.
<PAGE>
 
                                   EXHIBIT A
                                                                   Page 35 of 64

<TABLE> 
<CAPTION> 
                                                                                            RECORDED                     
LESSOR                                               LESSEE                 DATED        COB       PAGE      ENTRY #       
<S>                                        <C>                             <C>           <C>       <C>       <C>           
Robert J. Newell                           Total Minatome Corporation      07/15/92      1151       608       741660       
Ruth Holliston Sanders                     Total Minatome Corporation      07/15/92      1152       335       741865       
Donna J. Wichser                           Total Minatome Corporation      07/15/92      1155        58       742881       
Marjorie Reynolds                          Total Minatome Corporation      07/15/92      1156       444       743501       
Thomas Potter                              Total Minatome Corporation      07/15/92      1156       453       743506       
Thomas L. Fassett                          Total Minatome Corporation      07/15/92      1158       268       744471       
Willard Fassett                            Total Minatome Corporation      07/15/92      1158       264       744470       
Richard Fassett                            Total Minatome Corporation      07/15/92      1158       260       744469       
The Adrienne F. Faber Trust                Total Minatome Corporation      07/15/92      1158       256       744468       
L. Penfield Faber                          Total Minatome Corporation      07/15/92      1158       252       744467       
Janice Doty Hall                           Total Minatome Corporation      07/15/92      1152       331       741864       
Karl Gehlmann                              Total Minatome Corporation      07/15/92      1152       339       741866       
Donald R. Doty                             Total Minatome Corporation      07/15/92      1156       449       743505       
Paul A. Doty III and Donald J. Doty        Total Minatome Corporation      07/15/92      1156       549       743565       
Roxann F. Rhea                             Total Minatome Corporation      07/15/92      1156       680       743653       
The Ellen Lucy McHugh Trust                Total Minatome Corporation      07/15/92      1151       746       741711       
June R. Claus                              Total Minatome Corporation      07/15/92      1167       368       748541       
LaFourche Realty Company, Inc.             Total Minatome Corporation      01/01/92      1179                 754010       
LaFourche Realty Company, Inc.             Total Minatome Corporation      01/01/92      1179                 754011       
</TABLE>

That certain Operating Agreement providing a Carried Interest to State effective
January 11, 1978 between the State Mineral Board, for and on behalf of the State
of Louisiana, and Texas Gas Exploration Corporation, Lynal Exploration Company,
Tesoro Petroleum Corporation, Samedan Oil Corporation, Oppenheimer Oil & Gas,
Inc., McMoRan Exploration Co. and Natomas Exploration, Inc., referred to
collectively as Operator, recorded in the Conveyance Records of Lafourche
Parish, Louisiana on January 19, 1978, in Book 616 under Entry Nos. 463367,
463368, 463369, 463370, 463371, 463372, and 463373.

<TABLE>
<CAPTION>
                                                                                    
LESSOR                                           LESSEE                     DATED        COB     FOLIO   ENTRY #        
<S>                               <C>                                      <C>           <C>       <C>       <C>     
                                                                                                                  
 1.  LAFOURCHE REALTY COMPANY              FORMAN PETROLEUM CORPORATION  SEPT. 1, 1993   1179            754012   
 2.  LAFOURCHE REALTY COMPANY              FORMAN PETROLEUM CORPORATION  SEPT. 5, 1993   1179            754013   
 3.  LAFOURCHE REALTY CO., INC.            TOTAL MINATOME CORPORATION    JAN. 1, 1992    1179            754010   
 4.  LAFOURCHE REALTY CO., INC.            TOTAL MINATOME CORPORATION    JAN. 1, 1992    1179            754011   
 5.  DONNA J. WICHSER                      TOTAL MINATOME CORPORATION    JULY 15, 1992   1155     58     742881   
 6.  MARJORIE REYNOLDS                     TOTAL MINATOME CORPORATION    JULY 15, 1992   1156    444     743501   
 7.  THOMAS POTTER                         TOTAL MINATOME CORPORATION    JULY 15, 1992   1156    453     743506   
 8.  ADRIENNE F. FABER TRUST, THE, U/W     TOTAL MINATOME CORPORATION    JULY 15, 1992   1158    256     744468 
 9.  JUNE R. CLAUS                         TOTAL MINATOME CORPORATION    JULY 15, 1992   1167    368     748541   
10.  L. PENFIELD FABER                     TOTAL MINATOME CORPORATION    JULY 15, 1992   1158    252     744467   
11.  THOMAS L. FASSETT                     TOTAL MINATOME CORPORATION    JULY 15, 1992   1158    268     744471   
12.  WILLARD FASSETT                       TOTAL MINATOME CORPORATION    JULY 15, 1992   1158    264     744470   
13.  RICHARD FASSETT                       TOTAL MINATOME CORPORATION    JULY 15, 1992   1158    260     744469   
14.  PAUL A. DOTY, III, ET AL              TOTAL MINATOME CORPORATION    JULY 15, 1992   1156    549     743565   
15.  DONALD R. DOTY                        TOTAL MINATOME CORPORATION    JULY 15, 1992   1156    449     743505   
16.  ROXANN F. RHEA                        TOTAL MINATOME CORPORATION    JULY 15, 1992   1156    680     743653   
17.  SHIRLEY HARRISON HYDE, ET AL          FORMAN PETROLEUM CORPORATION  JAN. 1, 1993    1170            750093   
18.  WILLIAM HARRISON, ET AL               FORMAN PETROLEUM CORPORATION  JAN. 1, 1993    1170            750092   
19.  PATRICK J. HARRISON ESTATE            FORMAN PETROLEUM CORPORATION  JAN. 1, 1993    1173            751174   
20.  GLORIA K. FERRERA, ET AL              FORMAN PETROLEUM CORPORATION  JAN. 1, 1993    1170            750091   
21.  ANN V. PENMAN REVOCABLE TRUST, 
      THE, ET AL                           FORMAN PETROLEUM CORPORATION  JULY 15, 1993   1173    241     751233   
22.  THE ALLEN COMPANY                     FORMAN PETROLEUM CORPORATION  MARCH 1, 1993   1171            750581   
23.  LAFOURCHE REALTY COMPANY, INC.        FORMAN PETROLEUM CORPORATION  OCT. 1, 1993    1189    348     757789  
</TABLE> 
<PAGE>
 
                                  EXHIBIT A
                                                                   Page 36 of 64


                                   EFFECTIVE             CURRENT RECORDING
 PROPERTY NO     LEASE DATE          DATE            BOOK     PAGE      ENTRY  

01-0001156-001    09/25/1972      09/25/1972          508      249     383445
GROSS ACRES       LESSOR     :    WILLIAM H. HARRISON, ET AL
       82.44000   LESSOR ID  :
                  LESSEE     :    LYNAL EXPLORATION COMPANY
                  PROSPECT   :    LAKE ENFERMER


                                   EFFECTIVE             CURRENT RECORDING
 PROPERTY NO     LEASE DATE          DATE            BOOK     PAGE      ENTRY 

01-0001441-001    08/30/1972      08/30/1972          554      533     416550
GROSS ACRES       LESSOR     :    LAFOURCHE REALTY COMPANY
       64.99600   LESSOR ID  :
                  LESSEE     :    ROBERT A. CHENOWETH
                  PROSPECT   :    LAKE ENFERMER


RESERVATION AND EXCEPTION:

LESS AND EXCEPT THOSE PORTIONS OF THE ABOVE LEASES TO THE EXTENT THAT SUCH
LEASES ARE SITUATED WITHIN THE SURFACE BOUNDARIES OF THE H SAND, RESERVOIR A, IN
THE LAKE ENFERMER FIELD, LAFOURCHE PARISH, LOUISIANA, AS ESTABLISHED BY
LOUISIANA OFFICE OF CONSERVATION ORDER NUMBER 340-A DATED JUNE 4, 1974,
EFFECTIVE MAY 9, 1974 RECORDED IN COB 518, FOLIO 116 UNDER ENTRY NO. 390___ AND

LESS AND EXCEPT THOSE PORTIONS OF THE ABOVE LEASES TO THE EXTENT THAT SUCH
LEASES ARE SITUATED WITHIN THE SURFACE BOUNDARIES OF THE I RA SUA RESERVOIR A,
IN THE LAKE ENFERMER FIELD, LAFOURCHE PARISH, LOUISIANA, AS ESTABLISHED BY
LOUISIANA OFFICE OF CONSERVATION ORDER NUMBER 340-B DATED  JUNE 4, 1974,
EFFECTIVE MAY 9, 1974 RECORDED IN COB 518, FOLIO 116 UNDER ENTRY NO. 390258.


                                   EFFECTIVE             CURRENT RECORDING
 PROPERTY NO     LEASE DATE          DATE            BOOK     PAGE      ENTRY 

01-0001441-001    08/30/1972      08/30/1972          554      533     416550
GROSS ACRES       LESSOR     :    LAFOURCHE REALTY COMPANY
       64.99600   LESSOR ID  :
                  LESSEE     :    ROBERT A. CHENOWETH
                  PROSPECT   :    LAKE ENFERMER


                                   EFFECTIVE             CURRENT RECORDING
 PROPERTY NO     LEASE DATE          DATE            BOOK     PAGE      ENTRY 

01-0001538-001    11/24/1973      11/24/1973          506      250     382127
GROSS ACRES       LESSOR     :    LAFOURCHE REALTY COMPANY
       0.48200    LESSOR ID  :
                  LESSEE     :    LYNAL EXPLORATION COMPANY
                  PROSPECT   :    LAKE ENFERMER
<PAGE>
 
                                   EXHIBIT A
                                                                   Page 37 of 64

                                   EFFECTIVE             CURRENT RECORDING
 PROPERTY NO     LEASE DATE          DATE            BOOK     PAGE      ENTRY 

01-0002032-001    08/30/1980      08/30/1980          711      616     527528
GROSS ACRES       LESSOR     :    LAFOURCHE REALTY COMPANY
       20.62600   LESSOR ID  :
                  LESSEE     :    TEXAS GAS EXPLORATION CORPORATION
                  PROSPECT   :    LAKE ENFERMER


                                   EFFECTIVE             CURRENT RECORDING
 PROPERTY NO     LEASE DATE          DATE            BOOK     PAGE      ENTRY 

01-0002332-001    11/26/1978      11/26/1978          642      626     480876
GROSS ACRES       LESSOR     :    HAROLD J POTTER ET AL
       20.00000   LESSOR ID  :
                  LESSEE     :    TEXAS GAS EXPLORATION CORPORATION
                  PROSPECT   :    LAKE ENFERMER


                                   EFFECTIVE             CURRENT RECORDING
 PROPERTY NO     LEASE DATE          DATE            BOOK     PAGE      ENTRY 

01-0002332-002    11/26/1978      11/26/1978          642      630     480877
GROSS ACRES       LESSOR     :    ROBERT J NEWELL
       20.00000   LESSOR ID  :
                  LESSEE     :    TEXAS GAS EXPLORATION CORPORATION
                  PROSPECT   :    LAKE ENFERMER


                                   EFFECTIVE             CURRENT RECORDING
 PROPERTY NO     LEASE DATE          DATE            BOOK     PAGE      ENTRY 

01-0002332-003    11/26/1978      11/26/1978          642      634     480878
GROSS ACRES       LESSOR     :    DONNA NEWELL WICHSER
       20.00000   LESSOR ID  :
                  LESSEE     :    TEXAS GAS EXPLORATION CORPORATION
                  PROSPECT   :    LAKE ENFERMER


                                   EFFECTIVE             CURRENT RECORDING
 PROPERTY NO     LEASE DATE          DATE            BOOK     PAGE      ENTRY 

01-0002333-001    02/06/1979      02/06/1979          642      618     480874
GROSS ACRES       LESSOR     :    HUGH C MCNEIL, ET AL
       20.00000   LESSOR ID  :
                  LESSEE     :    TEXAS GAS EXPLORATION CORPORATION
                  PROSPECT   :    LAKE ENFERMER
<PAGE>
 
                                   EXHIBIT A
                                                                   Page 38 of 64

                                   EFFECTIVE             CURRENT RECORDING
 PROPERTY NO     LEASE DATE          DATE            BOOK     PAGE      ENTRY  

01-0002333-002    01/17/1979      01/17/1979          642      622     480875
GROSS ACRES       LESSOR     :    GRACE WELD COLBY, ET AL
       20.00000   LESSOR ID  :
                  LESSEE     :    TEXAS GAS EXPLORATION CORPORATION
                  PROSPECT   :    LAKE ENFERMER


                                   EFFECTIVE             CURRENT RECORDING
 PROPERTY NO     LEASE DATE          DATE            BOOK     PAGE      ENTRY 

01-0002367-001    11/21/1978      11/21/1978          642      602     480870
GROSS ACRES       LESSOR     :    ADRIENNE F FABER
       80.00000   LESSOR ID  :
                  LESSEE     :    TEXAS GAS EXPLORATION CORPORATION
                  PROSPECT   :    LAKE ENFERMER


                                   EFFECTIVE             CURRENT RECORDING
 PROPERTY NO     LEASE DATE          DATE            BOOK     PAGE      ENTRY 

01-0002367-002    11/21/1978      11/21/1978          642      606     480871
GROSS ACRES       LESSOR     :    JUNE R CLAUSE
       80.00000   LESSOR ID  :
                  LESSEE     :    TEXAS GAS EXPLORATION CORPORATION
                  PROSPECT   :    LAKE ENFERMER


                                   EFFECTIVE             CURRENT RECORDING
 PROPERTY NO     LEASE DATE          DATE            BOOK     PAGE      ENTRY 

01-0002367-003    11/25/1978      11/25/1978          642      610     480872
GROSS ACRES       LESSOR     :    DR L PENFIELD FABER
       80.00000   LESSOR ID  :
                  LESSEE     :    TEXAS GAS EXPLORATION CORPORATION
                  PROSPECT   :    LAKE ENFERMER


                                   EFFECTIVE             CURRENT RECORDING
 PROPERTY NO     LEASE DATE          DATE            BOOK     PAGE      ENTRY 

01-0002367-004    11/21/1978      11/21/1978          642      614     480873
GROSS ACRES       LESSOR     :    THOMAS L. FASSETT ET AL
       80.00000   LESSOR ID  :
                  LESSEE     :    TEXAS GAS EXPLORATION CORPORATION
                  PROSPECT   :    LAKE ENFERMER
<PAGE>
 
                                   EXHIBIT A
                                                                   Page 39 of 64


                                   EFFECTIVE             CURRENT RECORDING
 PROPERTY NO     LEASE DATE          DATE            BOOK     PAGE      ENTRY 

01-0002536-001    11/27/1978      11/27/1978          645        1     482083
GROSS ACRES       LESSOR     :    PAUL A DOTY
       32.43100   LESSOR ID  :
                  LESSEE     :    TEXAS GAS EXPLORATION CORPORATION
                  PROSPECT   :    LAKE ENFERMER


                                   EFFECTIVE             CURRENT RECORDING
 PROPERTY NO     LEASE DATE          DATE            BOOK     PAGE      ENTRY 

01-0002536-002    11/27/1978      11/27/1978          645       17     482087
GROSS ACRES       LESSOR     :    MARIAN DOTY GEHLMANN
       80.00000   LESSOR ID  :
                  LESSEE     :    TEXAS GAS EXPLORATION CORPORATION
                  PROSPECT   :    LAKE ENFERMER


                                   EFFECTIVE             CURRENT RECORDING
 PROPERTY NO     LEASE DATE          DATE            BOOK     PAGE      ENTRY 

01-0002536-003    11/27/1978      11/27/1978          645       13     482086
GROSS ACRES       LESSOR     :    DONALD R. DOTY
       80.00000   LESSOR ID  :
                  LESSEE     :    TEXAS GAS EXPLORATION CORPORATION
                  PROSPECT   :    LAKE ENFERMER


                                   EFFECTIVE             CURRENT RECORDING
 PROPERTY NO     LEASE DATE          DATE            BOOK     PAGE      ENTRY 

01-0002536-004    11/27/1978      11/27/1978          645        5     482084
GROSS ACRES       LESSOR     :    HELEN G DOTY ET AL
       80.00000   LESSOR ID  :
                  LESSEE     :    TEXAS GAS EXPLORATION CORPORATION
                  PROSPECT   :    LAKE ENFERMER


                                   EFFECTIVE             CURRENT RECORDING
 PROPERTY NO     LEASE DATE          DATE            BOOK     PAGE      ENTRY 

01-0002536-005    11/27/1978      11/27/1978          645        9     482085
GROSS ACRES       LESSOR     :    ROXANN F RHEA
       80.00000   LESSOR ID  :
                  LESSEE     :    TEXAS GAS EXPLORATION CORPORATION
                  PROSPECT   :    LAKE ENFERMER
<PAGE>
 
                                   EXHIBIT A
                                                                   Page 40 of 64


                                   EFFECTIVE             CURRENT RECORDING
 PROPERTY NO     LEASE DATE          DATE            BOOK     PAGE      ENTRY 

01-0003265-001    11/24/1982      11/24/1982          798       65     573212
GROSS ACRES       LESSOR     :    LAFOURCHE REALTY COMPANY INC
       37.00700   LESSOR ID  :
                  LESSEE     :    TEXAS GAS EXPLORATION CORPORATION
                  PROSPECT   :    LAKE ENFERMER


                                   EFFECTIVE             CURRENT RECORDING
 PROPERTY NO     LEASE DATE          DATE            BOOK     PAGE      ENTRY 

01-0003267-001    06/10/1982      06/10/1982          782      801     566560
GROSS ACRES       LESSOR     :    LAFOURCHE REALTY COMPANY INC
       1.92200    LESSOR ID  :
                  LESSEE     :    TEXAS GAS EXPLORATION CORPORATION
                  PROSPECT   :    LAKE ENFERMER


                                   EFFECTIVE             CURRENT RECORDING
 PROPERTY NO     LEASE DATE          DATE            BOOK     PAGE      ENTRY 

01-0006385-001    11/01/1986      11/01/1986          990      446     669883
GROSS ACRES       LESSOR     :    LAFOURCHE REALTY COMPANY INC
       39.48900   LESSOR ID  :
                  LESSEE     :    CSX OIL & GAS CORPORATION
                  PROSPECT   :    LAKE ENFERMER


                                   EFFECTIVE             CURRENT RECORDING
 PROPERTY NO     LEASE DATE          DATE            BOOK     PAGE      ENTRY 

01-0006413-001    02/01/1987      02/01/1987          992      538     670646
GROSS ACRES       LESSOR     :    LAFOURCHE REALTY COMPANY INC
       1.47700    LESSOR ID  :
                  LESSEE     :    CSX OIL & GAS CORPORATION
                  PROSPECT  :     LAKE ENFERMER


                                   EFFECTIVE             CURRENT RECORDING
 PROPERTY NO     LEASE DATE          DATE            BOOK     PAGE      ENTRY 

01-5240702-001    07/15/1992      07/15/1992         1151      608     741660
GROSS ACRES       LESSOR     :    ROBERT J NEWELL
       20.00000   LESSOR ID  :
                  LESSEE     :    TOTAL MINATOME CORPORATION
                  PROSPECT   :    LAKE ENFERMER
<PAGE>
 
                                   EXHIBIT A
                                                                   Page 41 of 64


                                   EFFECTIVE             CURRENT RECORDING
 PROPERTY NO     LEASE DATE          DATE            BOOK     PAGE      ENTRY 

01-5240702-002    07/15/1992      07/15/1992         1152      335     741865
GROSS ACRES       LESSOR     :    RUTH HOLLISTON SANDERS
       20.00000   LESSOR ID  :
                  LESSEE     :    TOTAL MINATOME CORPORATION
                  PROSPECT   :    LAKE ENFERMER


                                   EFFECTIVE             CURRENT RECORDING
 PROPERTY NO     LEASE DATE          DATE            BOOK     PAGE      ENTRY 

01-5240708-001    07/15/1992      07/15/1992         1151      746     741711
GROSS ACRES       LESSOR     :    THE ELLEN LUCY MCHUGH TRUST
       20.00000   LESSOR ID  :
                  LESSEE     :    TOTAL MINATOME CORPORATION
                  PROSPECT   :    LAKE ENFERMER


                                   EFFECTIVE             CURRENT RECORDING
 PROPERTY NO     LEASE DATE          DATE            BOOK     PAGE      ENTRY 

01-5240709-001    07/15/1992      07/15/1992         1152      331     741864
GROSS ACRES       LESSOR     :    JANICE DOTY HALL
       80.00000   LESSOR ID  :
                  LESSEE     :    TOTAL MINATOME CORPORATION
                  PROSPECT   :    LAKE ENFERMER


                                   EFFECTIVE             CURRENT RECORDING
 PROPERTY NO     LEASE DATE          DATE            BOOK     PAGE      ENTRY 

01-5240709-002    07/15/1992      07/15/1992         1152      339     741866
GROSS ACRES       LESSOR     :    KARL GEHLMANN
       80.00000   LESSOR ID  :
                  LESSEE     :    TOTAL MINATOME CORPORATION
                  PROSPECT   :    LAKE ENFERMER


                                   EFFECTIVE             CURRENT RECORDING
 PROPERTY NO     LEASE DATE          DATE            BOOK     PAGE      ENTRY 
 
                  01-01/1992
GROSS ACRES       LESSOR     :    LAFOURCHE REALTY COMPANY INC
                  LESSOR ID  :
                  LESSEE     :    TOTAL MINATOME CORPORATION
                  PROSPECT   :    LAKE ENFERMER

LAFOURCHE REALTY COMPANY, INC. LANDS SITUATED IN LAFOURCHE PARISH, LOUISIANA AND
DESCRIBED AS FOLLOWS TO-WIT:

12.157 acres, more or less, situated in Sections 7 and 18 of Township 20 South,
Range 23 East and being more particularly described by metes and bounds as
follows:
<PAGE>
 
                                   EXHIBIT A
                                                                   Page 42 of 64


Beginning at a point along the intersection of the T-1 RA SUA and the R RA SUA
having Lambert coordinates as
x = 2,372,047.33
y = 251,372.76
thence northwest along the T-1 RA SUA N86d 11'9"W  107.58'
thence S85d36'05"W         286.84'
thence S64d55'57"W         136.89'
thence S26d12'00"W         210.64'
thence S15d03'42"W         311.71'
thence S10d21'12"W         422.88'
thence S06d27'01"W         632.00'
thence S01d55'54"W         682.39'
thence S00d46'13"E         595.05'
thence S05d49'02"E         508.85' 
to a point along the intersection of the T-1 RA SUA
and the R RA SUA
x = 2,371,245.57
y = 247,982.76
thence northwest along the R RA SUA N11d31'18"W    208.05'
thence N09d59'24"W         553.39'
thence N05d07'31"W         526.10'
thence N02d08'24"E         562.39'
thence N06d11'51"E         842.93'
thence N02d19'04"E         420.34'
thence N09d46'57"E         147 14'
thence N14d37'15"E         118 85'
thence N32d16'32"E         112 36'
thence N52d35'41"E         107 00'
thence N66d48'05"E         114 23'
thence N80d54'35"E         126 59'
thence S76d30'15"E         128.55'
thence S65d51'16"E         158 90'
thence S59d14'45"E         182 87'
to the Point of Beginning

THE NOMENCLATURE FOR THE UNITS MENTIONED IN THE ABOVE METES AND BOUNDS ARE MORE
PARTICULARLY DESCRIBED AS FOLLOWS:

R RA SUA ESTABLISHED BY LOUISIANA OFFICE OF CONSERVATION ORDER NO. 340-P-3,
DATED OCTOBER 18, 1983, EFFECTIVE AUGUST 30, 1983, RECORDED COB 840, FOLIO - ,
ENTRY NO. 593064.

T-1 RA SUA ESTABLISHED BY  LOUISIANA OFFICE OF CONSERVATION ORDER NO. 340-Q-2,
DATED OCTOBER 18, 1983, EFFECTIVE AUGUST 30, 1983, RECORDED COB 840, FOLIO - ,
ENTRY NO. 593062.

                                   EFFECTIVE             CURRENT RECORDING
 PROPERTY NO     LEASE DATE          DATE            BOOK     PAGE      ENTRY 

                  01/01/1992
GROSS ACRES       LESSOR     :    LAFOURCHE REALTY COMPANY INC
                  LESSOR ID  : 
                  LESSEE     :    TOTAL MINATOME CORPORATION
                  PROSPECT   :    LAKE ENFERMER
<PAGE>
 
                                   EXHIBIT A
                                                                   Page 43 of 64


LAFOURCHE REALTY COMPANY, INC. LANDS SITUATED IN LAFOURCHE PARISH,
LOUISIANA AND DESCRIBED AS FOLLOWS TO-WIT:
 
TRACT 1:   2.122 acres, more or less, situated in Section 19, Township 20 South,
-------    Range 23 East, and being more particularly described by metes and
           bounds as follows:

Beginning at a point along the Intersection of V-3 RD SU A and
V 2 RD SU A having Lambert coordinates
x = 2,378,150.00
y = 243,410.00
thence Southwest along the V-2 RD SU A S13d23'33"E    215.87
thence S09d05'25"E                              253.18
thence S03d10'47"E                              180.28
thence S07d07'30"W                              241.87" to a point along the 
intersection of the V-2 RD SU A and the V-3 RD SU A having Lambert coordinates
x = 2,378,220.00
y = 242,530.00
thence Northeast along the V-3 RD SU A N00d00'02"E    270.00'
thence N06d32'47"W  614.00' to the point of beginning.

TRACT 2:   .459 acres, more or less, situated in Section 20, Township 20 South,
-------    Range 23 East, and being more particularly described by metes and
           bounds as follows:

Beginning at a point along the Intersection of the V-3 RD SU A and
the V-2 RD SU A having Lambert coordinates
x = 2,374,776.92
y = 240,647.10
thence Southwest along the V-3 RD SU A S01d19'34"W    565.03' to the
Intersection
of the V-2 RD SU A and the V-3 RD SU A having Lambert coordinates
x = 2,374,763.85
y = 240,082.22
thence Northwestward along the V-2 RD SU A N83d59'28"W 328.35'
to a point having Lambert coordinates
x = 2,374,437.31
y = 240,118.59
thence Northeast N32d37'35"W  029 91' to the point of beginning

     THE NOMENCLATURE FOR THE UNITS MENTIONED IN THE ABOVE METES AND BOUNDS
     DESCRIPTION ARE MORE PARTICULARLY DESCRIBED AS FOLLOWS:

     V-2 RD SUA ESTABLISHED BY LOUISIANA OFFICE OF CONSERVATION ORDER NO. 340-T-
     4, DATED JULY 1, 1985, EFFECTIVE MAY 7, 1985, RECORDED COB 918, FOLIO 756,
     ENTRY NO. 631920, RECORDS OF LAFOURCHE PARISH, LOUISIANA.

     V-2 RD SUA ESTABLISHED BY LOUISIANA OFFICE OF CONSERVATION ORDER NO. 340-S-
     4, DATED JULY 1, 1985, EFFECTIVE MAY 7, 1985, RECORDED COB 918, FOLIO 760,
     ENTRY NO. 631921, RECORDS OF LAFOURCHE PARISH, LOUISIANA.
<PAGE>
 
                                   EXHIBIT A
                                                                   Page 44 of 64


Contract No. 136
----------------

  Farmout Agreement dated April 10, 1973, between Lynal Exploration Company,
  Samedan Oil Corporation, Tesoro Petroleum Corporation and Oppenheimer Oil and
  Gas, Inc., as Farmors, and Texas Gas Exploration Corporation, as Farmee,
  covering certain lands and leases in Lafourche Parish, Louisiana.

Contract No.137
---------------

  Joint Operating Agreement dated December 14, 1973, between Texas Gas
  Exploration Corporation, as Operator, and Lynal Exploration Company, Tesoro
  Petroleum Corporation, Samedan Oil Corporation and Oppenheimer Oil & Gas, Inc.
  as Non-Operators; a declaration and notice of same having been recorded in the
  Conveyance Records of Lafourche Parish, Louisiana on November 15, 1976, in
  Book 579, at Folio 138, under Entry No. 435086.

Contract No.138
---------------

  Unit Operating Agreement dated May 9, 1974, between Texas Gas Exploration
  Corporation, as Operator, and Lynal Exploration Company, Tesoro Petroleum
  Corporation, Samedan Oil Corporation, Oppenheimer Oil & Gas, Inc., and Petro-
  Lewis Corporation,  as Non-Operators, covering the operation of the "I" RA SU
  A, established by Louisiana Department of Conservation Order No. 340-B,
  effective May 9, 1974; a declaration and notice of said Agreement having been
  recorded in the Conveyance Records of Lafourche Parish, Louisiana on November
  15, 1976, in Book 579, at Folio 144, under Entry No. 435087.

Contract No.139
---------------

  Unit Operating Agreement dated August 14, 1974, between Texas Gas Exploration
  Corporation, as Operator, and Lynal Exploration Company, Tesoro Petroleum
  Corporation, Samedan Oil Corporation, Oppenheimer Oil & Gas, Inc., and Petro-
  Lewis Corporation,  as Non-Operators, covering the operation of the "H" RB SU
  A, established by Louisiana Department of Conservation Order No. 340-A-1,
  effective August 14, 1974; a declaration and notice of said Agreement having
  been recorded in the Conveyance Records of Lafourche Parish, Louisiana on
  November 15, 1976, in Book 579, at Folio 146, under Entry No. 435088.

Contract No.140
---------------

  Unit Operating Agreement dated June 17, 1975 between Texas Gas Exploration
  Corporation, as Operator, and Lynal Exploration Company, Tesoro Petroleum
  Corporation, Samedan Oil Corporation, Oppenheimer Oil & Gas, Inc., and Petro-
  Lewis Corporation,  as Non-Operators, covering the operation of the "J" RA SU
  A, established by Louisiana Department of Conservation Order No. 340-H,
  effective June 17, 1975; a declaration and notice of said Agreement having
  been recorded in the Conveyance Records of Lafourche Parish, Louisiana on
  April 4, 1977, in Book 591, at Folio 393 under Entry No. 443618.

Contract No. 141
----------------

  Farmout Agreement dated February 13, 1976, as amended, between McMoRan
  Exploration Company and Texas Gas Exploration Corporation, covering certain
  lands and leases in Lafourche Parish, Louisiana.
<PAGE>
 
                                   EXHIBIT A
                                                                   Page 45 of 64


Contract No.142
---------------

  Joint Operating Agreement dated effective December 1, 1976, between Texas Gas
  Exploration Corporation, as Operator, and Inc., Tesoro Petroleum Corporation,
  Samedan Oil Corporation, OPCO Production Company, McMoRan Oil & Gas Company
  and Natomas North America, Inc., as Non-Operators, a declaration and notice of
  same having been recorded in the Conveyance Records of Lafourche Parish,
  Louisiana on August 11, 1980 in Book 708, at Folio 777 under Entry No. 525436.

Contract No.143
---------------

  Unit Operating Agreement dated June 28, 1977 between Texas Gas Exploration
  Corporation, as Operator, and Douglas D. Lynn, Alton Coats Estate, Tesoro
  Petroleum Corporation, Samedan Oil Corporation, OPCO Production Company,
  McMoRan Oil & Gas Company, and Natomas North America, Inc., as Non-Operator,
  covering operations of the "R" RA SU A, established by Louisiana Department of
  Conservation Order No. 340-P-1, effective June 28, 1977 as amended by Orders
  340-P-2 and 340-P-3; a declaration and notice of said Agreement being recorded
  in the Conveyance Records of Lafourche Parish, Louisiana on January 15, 1985
  in Book 898, at Folio 456 under Entry No. 621391.

Contract No.144
---------------

  Operating Agreement Providing A Carried Interest to State effective January
  11, 1978 between the State Mineral Board, for and on behalf of the State of
  Louisiana, and Texas Gas Exploration Corporation, Lynal Exploration Company,
  Tesoro Petroleum Corporation, Samedan Oil Corporation, Oppenheimer Oil & Gas,
  Inc., McMoRan Exploration Co. and Natomas Exploration, Inc. referred to
  collectively as Operator, recorded in the Conveyance Records of Lafourche
  Parish, Louisiana on January 19, 1978, in Book 616 under Entry Nos. 463367,
  463368, 463369, 463370, 463371, 463372, and 463373.

Contract No.145
---------------

  Unit Operating Agreement dated March 15, 1978 between Texas Gas Exploration
  Corporation, as Operator, and Douglas D. Lynn, Alton Coats Estate, Tesoro
  Petroleum Corporation, Samedan Oil Corporation, OPCO Production Company,
  McMoRan Oil & Gas Company, and Natomas North America, Inc., as Non-Operator,
  covering operators of the "V-3" RA SU A, established by Louisiana Department
  of Conservation Order No. 340-S, effective March 15, 1978, as amended by Order
  340-S-1; a declaration and notice of said Agreement being recorded in the
  Conveyance Records of Lafourche Parish, Louisiana on January 15, 1985 in Book
  898, at Folio 454 under Entry No.  621390.

Contract No.146
---------------

  Joint Operating Agreement dated effective March 15, 1978 between Texas Gas
  Exploration Corporation, as Operator, and Lynal Exploration Company, Tesoro
  Petroleum Corporation, Samedan Oil Corporation, OPCO Production Company,
  McMoRan Oil & Gas Company and Natomas North America, Inc., as Non-Operators, a
  declaration and notice of same having been recorded in the Conveyance Records
  of Lafourche Parish, Louisiana on August 11, 1980, in Book 708, at Folio 773,
  under Entry No.525435, as amended 11-20-80.
<PAGE>
 
                                   EXHIBIT A
                                                                   Page 46 of 64


Contract No. 148
----------------

  Farmout Agreement dated September 14, 1984, between Samedan Oil Corporation,
  Yankee Exploration, Inc., Damson Oil Corporation, Lynal, Inc., as Farmors, and
  Texas Gas Exploration Corporation, as Farmee, covering certain lands and
  leases in Lafourche Parish, Louisiana.

Contract No. 235
----------------

  Unit Operating Agreement dated June 28, 1977 between Texas Gas Exploration
  Corporation, as Operator, and Douglas D. Lynn, Alton Coats Estate, Tesoro
  Petroleum Corporation, Samedan Oil Corporation, OPCO Production Company,
  McMoRan Oil & Gas Company and Natomas North America, Inc., as Non-Operators,
  covering the operations of the "T-1" RA SU A, established by Louisiana
  Department of Conservation Order No. 340-Q, effective June 28, 1977 as amended
  by Orders 340-Q-1 and 340-Q-2; a declaration and notice of said Agreement
  being recorded in the Conveyance Records of Lafourche Parish, Louisiana on
  January 15, 1985 in Book 898, at Folio 452 under Entry No. 621389.

Contract No. 209:
---------------- 

  AMI Termination Agreement between TGEC and MCMORAN, et al dated 8/22/1979.
  Lake Enfermer Prospect, Lafourche Parish, Louisiana.

Contract No. 147:
---------------- 

  Farmout Agreement between MCMORAN Production Co-Opr, and TGEC-Non-Opr dated
  10/11/1983.  Lake Enfermer Prospect, Lafourche Parish, Louisiana, as amended
  4/25/84; 6/25/84.

Contract No. 1051:
----------------- 

  Farmout Agreement dated 8/30/84, amended 9/14/84, between Samedan, et al and
  TGEC. Lake Enfermer Prospect, Lafourche Parish, Louisiana.

Contract No. 1052:
----------------- 

  Farmout Agreement dated 8/7/1984 between Damson and TGEC.  Lake Enfermer
  Prospect, Lafourche Parish, Louisiana.

  Transportation Agreement between Louisiana Intrastate Gas Corporation (LIG)
  and TOTAL MINATOME CORPORATION dated March 1, 1992.

  Gas Agreement dated 4/10/75 between TGEC and Mr. Richard St. Pierre, Sr.

  Graham Agency Agreement dated March 14, 1988.

  Voluntary Unit with the State Mineral Board of the State of Louisiana covering
  State Lease Numbers 8403 and 6024, being a pooled unit bounded by V-3 RB SUA,
  V-4 RA SUA, V-2 RB SUA and T-7 RC SUA, recorded in Book 891, Page 490, Entry
  No. 618326, Lafourche Parish, Louisiana.  Contract No. 695.
<PAGE>
 
                                   EXHIBIT A
                                                                   Page 47 of 64


                              LAKE ENFERMER FIELD
                              -------------------

1. Oil, Gas and Mineral Lease, dated October 1, 1993, between Lafourche Realty
   Company, as Lessor, and Forman Petroleum Corporation, as Lessee, recorded in
   Conveyance Book 118, Folio 348, Entry No. 757789 of the records of Lafourche
   Parish, Louisiana.

2. Oil, Gas and Mineral Lease, dated January 1, 1993, between Lafourche Realty
   Company, as Lessor, and Forman Petroleum Corporation, as Lessee, recorded in
   Conveyance Book 1201, Folio 149, Entry No. 763180 of the records of Lafourche
   Parish, Louisiana.

3. Oil, Gas and Mineral Lease, dated March 1, 1993, between The Allan Company,
   as Lessor, and Forman Petroleum Corporation, as Lessee, recorded in
   Conveyance Book 1171, Entry No. 750581 of the records of Lafourche Parish,
   Louisiana.

4. Oil, Gas and Mineral Lease, dated October 21, 1993, between William H.
   Harrison, Jr., Administrator of the Succession of Patrick John Harrison, as
   Lessor, and Forman Petroleum Corporation, as Lessee, recorded in Conveyance
   Book 1194, Folio 650, Entry No. 759920 of the records of Lafourche Parish,
   Louisiana.

5. Oil, Gas and Mineral Lease, dated October 21, 1993, between William H.
   Harrison, Jr., et al, as Lessors, and Forman Petroleum Corporation, as
   Lessee, recorded in Conveyance Book 1192, Entry No. 758828 of the records of
   Lafourche Parish, Louisiana.

6. Oil, Gas and Mineral Lease, dated October 21, 1993, between Gloria Knight
   Ferrera, et al, as Lessors, and Forman Petroleum Corporation, as Lessee,
   recorded in Conveyance Book 1192, Entry No. 758827 of the records of
   Lafourche Parish, Louisiana.

 7. Oil, Gas and Mineral Lease, dated October 21, 1993, between Shirley Harrison
  Hyde, et al, as Lessors, and Forman Petroleum Corporation, as Lessee, recorded
  in Conveyance Book 1192, Entry No. 758829 of the records of Lafourche Parish,
  Louisiana.

8. Oil, Gas and Mineral Lease, dated June 30, 1994, between Philip A. Grove, et
   al, as Lessor and Forman Petroleum Corporation, as Lessee, recorded in
   Conveyance Book 1215, Folio 597, Entry No. 770121 of the records of Lafourche
   Parish, Louisiana.

9. Oil, Gas and Mineral Lease, dated July 25, 1994, between The Allan Company,
   as Lessor, and Forman Petroleum Corporation, as Lessee, recorded in
   Conveyance Book 1214, Folio 521, Entry No. 769655 of the records of Lafourche
   Parish, Louisiana.

10. Oil, Gas and Mineral Lease, dated May 16, 1994, between the State Mineral
    Board of the State of Louisiana, acting for and in behalf of the Lafourche
    Parish School Board, as Lessor, and Forman Petroleum Corporation, as Lessee,
    recorded in Conveyance Book 1208, Folio 818, Entry No. 767117 of the records
    of Lafourche Parish, Louisiana.
<PAGE>
 
                                   EXHIBIT A
                                                                   Page 48 of 64


                              LAKE ENFERMER FIELD
                          LAFOURCHE PARISH, LOUISIANA

1.   Oil, Gas and Mineral Lease, dated November 1, 1993, between The William H.
Harrison, Jr. Family Project, as Lessor, and Forman Petroleum Corporation, as
Lessee, recorded in COB 1252, Folio 62, Entry No.786316, records of Lafourche
Parish, Louisiana. (Lease No. 9203-0008-04)

2.   Oil, Gas and Mineral Lease, dated October 21,1993, between The William H.
Harrison, Jr. - Family Project, as Lessor, and Forman Petroleum Corporation, as
Lessee, recorded in COB 1240, Folio 223, Entry No. 780620, records of Lafourche
Parish, Louisiana. (Lease No. 9203-0008-07)

3.   Oil, Gas and Mineral Lease, dated January 18, 1996, between The Ellen Lucy
McHugh Trust, as Lessor, and Forman Petroleum Corporation, as Lessee, recorded
in COB 1264, Entry No.792430, records of LaFourche Parish, Louisiana. (Lease No.
9203-0016-02)

4.   Oil, Gas and Mineral Lease, dated January 18, 1996, between The Clint Colby
Revocable Trust, et al, as Lessor, and Forman Petroleum Corporation, as Lessee,
recorded in COB 1264, Entry No. 792429, records of LaFourche Parish, Louisiana.
(Lease No. 9203-0016-01)

5.   Oil, Gas and Mineral Lease, dated January 18, 1996, between The Adrienne F.
Faber Testamentary Trust, el al, as Lessor, and Forman Petroleum Corporation, as
Lessee, recorded in COB 1264, Entry No.792425 records of Lafourche Parish,
Louisiana. (Lease No. 9203-0017-01)

6.   Oil, Gas and Mineral Lease, dated January 18,1996, between Thomas L.
Fassett, as Lessor, and Forman Petroleum Corporation, as Lessee, recorded in COB
1264, Entry No. 792427, records of Lafourche Parish, Louisiana. (Lease No.9203-
0017-04)

7.   Oil, Gas and Mineral Lease, dated January 18,1996, between Willard Fassett,
as Lessor, and Forman Petroleum Corporation, as Lessee, recorded in COB 1264,
Entry No. 792428, records of Lafourche Parish, Louisiana. (Lease No. 9203-0017-
05)

8.   Oil, Gas and Mineral Lease, dated January 18,1996, between Richard Fassett,
as Lessor, and Forman Petroleum Corporation, as Lessee, recorded in COB 1264,
Entry No. 792426, records of Lafourche Parish, Louisiana. (Lease No. 9203-0017-
06)

9.   Oil, Gas and Mineral Lease, dated September 26,1994, between Gloria Knight
Ferrera, et al as Lessor, and Forman Petroleum Corporation, as Lessee, recorded
in COB 1239, Folio 774, Entry No. 780495, records of Lafourche Parish,
Louisiana. (Lease No. 9203-0040-01)

10.  Oil, Gas and Mineral Lease, dated September 26,1994, between Shirley
Harrison Hyde, et al, as Lessor, and Forman Petroleum Corporation, as Lessee,
recorded in COB 1239, Folio 782, Entry No.780496, records of Lafourche Parish,
Louisiana. (Lease No.9203-0040-02)

11.  Oil, Gas and Mineral Lease, dated September 26,1994, between The William H.
Harrison, Jr. - Family Project, as Lessor, and Forman Petroleum Corporation, as
Lessee, recorded in COB 1239, Folio 790, Entry No.780497, records of Lafourche
Parish, Louisiana. (Lease No. 9203-0040-03)
<PAGE>
 
                                   EXHIBIT A
                                                                   Page 49 of 64


                         FORMAN PETROLEUM CORPORATION
                             MANILLA VILLAGE FIELD
                          JEFFERSON PARISH, LOUISIANA

                                      I.

                          OIL GAS AND MINERAL LEASES


1.   940001. That certain Oil, Gas and Mineral Lease dated October 9, 1963,
between Alma Franz Deichmann, et al, as Lessors and Whitestone Petroleum
Corporation, as Lessee, which lease is recorded in COB 23, Folio 919 as Entry
No. 273368 of the Conveyance Records of Jefferson Parish, Louisiana.

                                        Before Payout       After Payout
                                        -------------       ------------

     Operating Interest                  0.08166667          0.07145833
     Net Revenue Interest                0.05843367          0.05112946

     Payout is determined pursuant to the terms of that certain Assignment and
Conveyance from C. T. Carden, et al to Forman Petroleum Corporation, recorded in
the records of Jefferson Parish, Louisiana, covering the above-described Oil,
Gas and Mineral Lease.

2.   940002. That certain Oil, Gas and Mineral Lease dated October 16, 1963,
between Herbert J. Harvey, as Lessor and Whitestone Petroleum Corporation, as
Lessee, which lease is recorded in Mineral Lease Book 24, Folio 47, as Entry No.
275432 of the Mineral Lease Records of Jefferson Parish, Louisiana.

                                        Before Payout       After Payout
                                        -------------       ------------

     Operating Interest                  0.01333333          0.01166667
     Net Revenue Interest                0.00854019          0.00747266

     Payout is determined pursuant to the terms of that certain Assignment and
Conveyance from C. T. Carden, et al to Forman Petroleum Corporation, recorded in
the records of Jefferson Parish, Louisiana, covering the above-described Oil,
Gas and Mineral Lease.

3.   940003. That certain Oil, Gas and Mineral Lease dated October 9, 1963,
between Lillian Richards, et al, as Lessors and Whitestone Petroleum
Corporation, as Lessee, which lease is recorded in Mineral Lease Book 23, Folio
915, as Entry No. 273367, of the Mineral Lease Records of Jefferson Parish,
Louisiana.

                                        Before Payout       After Payout
                                        -------------       ------------
     Operating Interest                  0.18400000          0.16100000
     Net Revenue Interest                0.13165464          0.11519779

     Payout is determined pursuant to the terms of that certain Assignment and
Conveyance from C. T. Carden, et al to Forman Petroleum Corporation, recorded in
the records of Jefferson Parish, Louisiana, covering the above-described Oil,
Gas and Mineral Lease.

4.   940004. That certain Oil, Gas and Mineral Lease dated October 9, 1963,
between George Deichmann, et al, as Lessors and Whitestone Petroleum
Corporation, as Lessee, which lease is recorded in Mineral Lease Book 23, Folio
911, as Entry No. 273366, of the Mineral Lease Records of Jefferson Parish,
Louisiana.
<PAGE>
 
                                   EXHIBIT A
                                                                   Page 50 of 64


                                        Before Payout       After Payout
                                        -------------       ------------

     Operating Interest                  0.42100000          0.36837500
     Net Revenue Interest                0.30123150          0.26357758

     Payout is determined pursuant to the terms of that certain Assignment and
Conveyance from C. T. Carden, et al to Forman Petroleum Corporation, recorded in
the records of Jefferson Parish, Louisiana, covering the above-described Oil,
Gas and Mineral Lease.

5.   940500. That certain Oil, Gas and Mineral Lease dated September 23, 1963,
between The State of Louisiana, as Lessor and Whitestone Petroleum Corporation,
as Lessee, which lease is recorded in Mineral Lease Book 23, Folio 903, Entry
No. 272461 of the Mineral Lease Records of Jefferson Parish, Louisiana, and
further designated as State Lease No. 4192,

     INSOFAR AND ONLY INSOFAR AS THE TRACTS OR PARCELS OF LAND COVERED BY SAID
     OIL, GAS AND MINERAL LEASE ARE LOCATED WITHIN THE PERIMETERS OF THE
     FOLLOWING DESCRIBED LANDS, TO-WIT:

     Beginning at U.S.C. & G.S. Station "Mud-1934", said point having Lambert
     Plane Coordinates of x = 2,416,499.62 and Y = 295,408.07, go West 1,550
     feet to a point, thence North 4,900 feet to a point on the West line of
     State Lease 4192, being the Southwest corner of the 14,700 feet Sand Unit
     B, and described herein as "Point of Beginning"; thence North along the
     West line of State Lease 4192 a distance of 3,200 feet to the Northwest
     Corner of said lease; thence East along the North line of said lease a
     distance of 7,250 feet to the Northeast Corner of said lease; thence
     Southerly a distance of 2,350 feet to a point on the East line of State
     Lease 4192; thence Westerly at right angles, a distance of 3,610 feet to a
     point; thence Southerly at right angles a distance of 250 feet to a point;
     thence Westerly at right angles a distance of 1,000 feet to a point on the
     East line of 14,700 feet Sand Unit "B"; thence Southerly a distance of 600
     feet to the Southeast Corner of 14,700 feet Sand Unit B; thence West a
     distance of 2,640 feet along the South boundary of said unit to the Point
     of Beginning.

                                        Before Payout       After Payout
                                        -------------       ------------
     Operating Interest                  0.70000000          0.61250000
     Net Revenue Interest                0.46320754          0.40530660

     Payout is determined pursuant to the terms of that certain Assignment and
Conveyance from C. T. Carden, et al to Forman Petroleum Corporation, recorded in
the records of Jefferson Parish, Louisiana, covering the above-described Oil,
Gas and Mineral Lease.

6.   941001 and 941002. That certain Oil, Gas and Mineral Lease dated January
21, 1967, between Emile A. Maier, et al, as Lessors and Whitestone Petroleum
Corporation, as Lessee, which lease was signed in counterparts that are recorded
in Mineral Lease Book 26, Folio 684, Entry No. 384949 of the Mineral Lease
Records of Jefferson Parish, Louisiana, and in Mineral Lease Book 26, Folio 690,
Entry No. 384950 of the Mineral Lease Records of Jefferson Parish, Louisiana,

     LESS AND EXCEPT THEREFROM THOSE PORTIONS OF THE TRACTS OR PARCELS OF LANDS
     COVERED BY THE ABOVE DESCRIBED OIL, GAS AND MINERAL LEASE LYING OUTSIDE OF
     THE FOLLOWING DESCRIBED UNITS, TO WIT:
<PAGE>
 
                                   EXHIBIT A
                                                                   Page 51 of 64


          1.  MV Bigenerina Q Sand Unit established by Louisiana Department of
     Conservation Order No. 582-C-1 dated October 19, 1970, effective 
     October 1, 1970.

          2.  MV Bigenerina O Sand Unit established by Louisiana Department of
     Conservation Order No. 582-D-1 dated October 16, 1970, effective 
     October 1, 1970.

          3.  MV Bigenerina E Sand Unit established by Louisiana Department of
     Conservation Order No. 582-E-l dated October 16, 1970, effective 
     October 1, 1970.

          4.  MV Bigenerina K Sand Unit established by Louisiana Department of
     Conservation Order No. 582-F-1 dated October 16, 1970, effective 
     October 1, 1970.

          5.  MV 9900' Sand Unit established by Louisiana Department of
     Conservation Order No. 582-J dated October 16, 1970, effective 
     October 1, 1970.

          6.  MV Bigenerina Q-1 Sand Unit established by Louisiana Department of
     Conservation Order No. 582-K dated October 19, 1970, effective 
     October 1, 1970.

          7.  Bigenerina M Sand Unit established by Louisiana Department of
     Conservation Order No. 582-G dated February 10, 1969, effective 
     February 1, 1969.

          8.  Bigenerina "R" Sand Unit established by Louisiana Department of
     Conservation Order No. 582-A-2 dated February 21, 1968, effective 
     February 9, 1968.

                                        Before Payout       After Payout
                                        -------------       ------------

     Operating interest                  0.70000000          0.61250000
     Net Revenue Interest                0.50085000          0.43824375

     Payout is determined pursuant to the terms of that certain Assignment and
Conveyance from C. T. Carden, et al to Forman Petroleum Corporation, recorded in
the records of Jefferson Parish, Louisiana, covering the above-described Oil,
Gas and Mineral Lease.

7.   941500. That certain Oil, Gas and Mineral Lease dated effective August 14,
1967, between The State of Louisiana, as Lessor and Whitestone Petroleum
Corporation, as Lessee, which lease is recorded in Mineral Lease Book 26, Folio
985, Entry No. 403622 of the Mineral Lease Records of Jefferson Parish,
Louisiana, and further designated as State Lease No. 4972.

                                        Before Payout       After Payout
                                        -------------       ------------
     Operating Interest                  0.70000000          0.61250000
     Net Revenue Interest                0.44887500          0.39276563

     Payout is determined pursuant to the terms of that certain Assignment and
Conveyance from C. T. Carden, et al to Forman Petroleum Corporation, recorded in
the records of Jefferson Parish, Louisiana, covering the above-described Oil,
Gas and Mineral Lease.
<PAGE>
 
                                   EXHIBIT A
                                                                   Page 52 of 64


8.   942001 and 942001. That certain Oil, Gas and Mineral Lease dated 
September 12, 1967, between Emile A. Maier, et al, as Lessors and Whitestone
Petroleum Corporation, as Lessee, which lease is recorded in Mineral Lease Book
27, Folio 64, Entry No. 405869 of the Mineral Lease Records of Jefferson Parish,
Louisiana, and in Mineral Lease Book 27, Folio 121, Entry No. 408393 of the
Mineral Lease Records of Jefferson Parish, Louisiana,

     INSOFAR AND ONLY INSOFAR AS THE LANDS DESCRIBED IN SAID OIL, GAS AND
     MINERAL LEASE ARE INCLUDED IN AND LIMITED TO THE MINERAL RIGHTS UNITIZED AS
     TO:

          a.  The MV Bigenerina "0" RA Sand Unit established by Louisiana
     Department of Conservation Order No. 582-D-l dated October 16, 1970,
     effective October 1, 1970.

          b.  The MV 9900' Sand Unit established by Louisiana Department of
     Conservation Order No. 582-J dated October 16, 1970, effective 
     October 1, 1970.

          c.  The MV Bigenerina "R" RA SU A Sand Unit established by Louisiana
     Department of Conservation Order No. 582-A-2 dated February 21, 1968,
     effective February 9, 1968.

                                        Before Payout       After Payout
                                        -------------       ------------
     Operating Interest                  0.70000000          0.61250000
     Net Revenue Interest                0.50085000          0.43824375

     Payout is determined pursuant to the terms of that certain Assignment and
Conveyance from C. T. Carden, et al to Forman Petroleum Corporation, recorded in
the records of Jefferson Parish, Louisiana, covering the above-described Oil,
Gas and Mineral Lease.

9.   943000. That certain Oil, Gas and Mineral Lease dated September 23, 1963,
between The State of Louisiana, as Lessor and Pel Tex Petroleum Company, as
Lessee, which lease is recorded in Mineral Lease Book 23, Folio 893, Entry No.
272125 of the Mineral Lease Records of Jefferson Parish, Louisiana, further
identified as State Lease 4190,

     INSOFAR AND ONLY INSOFAR AS THE LANDS DESCRIBED IN SAID OIL, GAS AND
     MINERAL LEASE ARE INCLUDED IN AND LIMITED TO THE MINERAL RIGHTS UNITIZED AS
     TO:

          a.  The MV Bigenerina "O" RA Sand Unit created by La. Office of
     Conservation Order No. 582-D-l dated effective October 1, 1970.

          b.  The MV Bigenerina "Q" RA Sand Unit created by La. Office of
     Conservation Order No. 582-C-1 dated effective October 1, 1970.

          c.  The MV Bigenerina "R" RA SU A created by La. Office of
     Conservation Order No. 582-A-2 dated effective February 9, 1968.

                                        Before Payout       After Payout
                                        -------------       ------------

     Operating Interest                  0.70000000          0.61250000
     Net Revenue Interest                0.49560021          0.43365183

10.  943500. That certain Oil, Gas and Mineral Lease dated August 21, 1963,
between Ada Jamison Watt, et al, as Lessors and Robert L. Wolfe as Lessee, which
lease is recorded in Mineral 
<PAGE>
 
                                   EXHIBIT A
                                                                   Page 53 of 64


Lease Book 23, Folio 993, Entry No. 274377 of the
Mineral Lease Records of Jefferson Parish, Louisiana.

11.  That certain Oil, Gas and Mineral Lease dated September 12, 1967, between
Emile A. Maier, et al, as Lessors and Whitestone Petroleum Corporation, as
Lessee, which lease is recorded in Mineral Lease Book 27, Folio 64, Entry No.
405869 of the Mineral Lease Records of Jefferson Parish, Louisiana, and in
Mineral Lease Book 27, Folio 121, Entry No. 408393 of the Mineral Lease Records,
of Jefferson Parish, Louisiana, SAVE AND EXCEPT THEREFROM THE FOLLOWING:

          a. All lands and mineral rights unitized as to:

       (i) The MV Bigenerina "0" RA Sand Unit established by Louisiana
       Department of Conservation Order No. 582-D-1 dated October 16, 1970,
       effective October 1, 1970;

       (ii) The MV 9900' Sand Unit established by Louisiana Department of
       Conservation Order No. 582-J dated October 16, 1970, effective October 1,
       1970; and

       (iii)  The MV Bigenerina "R" RA SU A Sand Unit established by Louisiana
       Department of Conservation Order No. 582-A-2 dated February 21, 1968,
       effective February 9, 1968; and

     b. All lands released by that certain instrument dated October 8, 1971
        executed by Patrick Petroleum Company, et al, recorded in Mineral Lease
        Book 29, Folio 889, Entry No. 538451.

                                        Before Payout       After Payout
                                        -------------       ------------
     Operating Interest                  0.70000000          0.61250000
     Net Revenue Interest                0.50085000          0.43824375

     Payout is determined pursuant to the terms of that certain Assignment and
Conveyance from C. T. Carden, et al to Forman Petroleum Corporation, recorded in
the records of Jefferson Parish, Louisiana, covering the above-described Oil,
Gas and Mineral Lease.

     INSOFAR AND ONLY INSOFAR AS THE LANDS DESCRIBED IN SAID OIL, GAS AND
     MINERAL LEASE ARE INCLUDED IN AND LIMITED TO THE MINERAL RIGHTS UNITIZED AS
     TO:

          a.  The MV Bigenerina "0" RA Sand Unit created by La. Office of
     Conservation Order No. 582-D-1 dated effective October 1, 1970.

          b.  The MV Bigenerina "Q" RA Sand Unit created by La Office of
     Conservation Order No. 582-C-1 dated effective October 1, 1970.

          c.  The MV Bigenerina "R" RA SU A created by La. Office of
     Conservation Order No. 582-A-2 dated effective February 9, 1968.

                                        Before Payout       After Payout
                                        -------------       ------------

     Operating Interest                  0.70000000          0.61250000
     Net Revenue Interest                0.49560021          0.43365177
<PAGE>
 
                                   EXHIBIT A
                                                                   Page 54 of 64


     Payout is determined pursuant to the terms of that certain Assignment and
Conveyance from C. T. Carden, et al to Forman Petroleum Corporation, recorded in
the records of Jefferson Parish, Louisiana, covering the above-described Oil,
Gas and Mineral Lease.

                                      II.

                                   FEE LAND


     That certain tract of land comprising 25 acres, more or less, located in
Section 37, Township 18 South, Range 24 East, Jefferson Parish, Louisiana, being
the same tract of land acquired by Tidewater Associated Oil Company from Zodiac
Corporation by deed dated March 30, 1949, and recorded in Conveyance Book 266,
Folio 685, and acquired by James D. Mullins, et al from Texaco Producing Inc.,
by deed dated May 31, 1985, recorded in COB 1260, Folio 28, Entry No. 85-25399,
in the records of Jefferson Parish, Louisiana, purporting to cover all surface
and mineral rights in and to subject property.

                                        Before Payout       After Payout
                                        -------------       ------------

                                                               #1 and
                                                              Payout #2

     Operating Interest                  0.70000000          0.61250000
     Net Revenue Interest                0.61110000          0.43135313

     Payout #1, relating to a certain reversionary interest, and Payout #2,
relating to a certain mineral royalty interest, are determined pursuant to the
terms of that certain Assignment and Conveyance from C. T. Carden, et al to
Forman Petroleum Corporation, recorded in the records of Jefferson Parish,
Louisiana, covering the above-described Oil, Gas and Mineral Lease.


                                     III.

                                UNIT INTERESTS


1.   M V 9900' RA Sand Unit created by State of Louisiana, Office of
Conservation Order No. 582-J, effective October 1, 1970.

                              Total Unit Interest
                              -------------------

                                        Before Payout       After Payout
                                        -------------       ------------

     Net Revenue Interest                0.44505841          0.38862266

     All payouts are determined pursuant to the terms of that certain Assignment
and Conveyance from C. T. Carden, et al to Forman Petroleum Corporation,
recorded in the records of Jefferson Parish, Louisiana, covering the above-
described Oil, Gas and Mineral Lease.

2.   M V Bigenerina K Sand Unit created by State of Louisiana, Office of
Conservation Order No. 582-F-1, effective October 1, 1970.

                              Total Unit Interest
                              -------------------

                                        Before Payout       After Payout
                                        -------------       ------------

     Net Revenue Interest                0.47256859          0.39994271
<PAGE>
 
                                   EXHIBIT A
                                                                   Page 55 of 64


     All payouts are determined pursuant to the terms of that certain Assignment
and Conveyance from C. T. Carden, et al to Forman Petroleum Corporation,
recorded in the records of Jefferson Parish, Louisiana, covering the above-
described Oil, Gas and Mineral Lease.

3.   M V Bigenerina 0 Sand Unit created by State of Louisiana, Office of
Conservation Order No. 582-D-1, effective October 1, 1970.

                              Total Unit Interest
                              -------------------

                                        Before Payout       After Payout
                                        -------------       ------------

     Net Revenue Interest                0.42960741          0.37259593

     All payouts are determined pursuant to the terms of that certain Assignment
and Conveyance from C. T. Carden, et al to Forman Petroleum Corporation,
recorded in the records of Jefferson Parish, Louisiana, covering the above-
described Oil, Gas and Mineral Lease.

4.   M V Bigemerina Q Sand Unit created by State of Louisiana, Office of
Conservation Order No. 582-C-l, effective October 1, 1970.

                              Total Unit Interest
                              -------------------

                                        Before Payout       After Payout
                                        -------------       ------------

     Net Revenue Interest                0.48856586          0.42451424

     All payouts are determined pursuant to the terms of that certain Assignment
and Conveyance from C. T. Carden, et al to Forman Petroleum Corporation,
recorded in the records of Jefferson Parish, Louisiana, covering the above-
described Oil, Gas and Mineral Lease.

5.   M V Bigenerina Q-1 Sand Unit created by State of Louisiana, Department of
Conservation Order No. 582-K, effective October 1, 1970.

                              Total Unit Interest
                              -------------------

                                        Before Payout       After Payout
                                        -------------       ------------

     Net Revenue Interest                0.48114320          0.41761012

     All payouts are determined pursuant to the terms of that certain Assignment
and Conveyance from C. T. Carden, et al to Forman Petroleum Corporation,
recorded in the records of Jefferson Parish, Louisiana, covering the above-
described Oil, Gas and Mineral Lease.


                                      IV.

                                     WELLS


1. E. A. Maier "B", Well #1. S/N 124815. Located 3,150' South of North Line &
   3,775' East of West Line of, and in Sec. 27, T18S-R24E, Jefferson Parish,
   Louisiana. Serves as Unit Well for 9900' SU.

2. Getty Fee, Well #1. S/N 124108. Located 2,334' South of North Line & 2,321'
   East of West Line of Section 27, to location in Sec. 37, T18S-R24E, Jefferson
   Parish, Louisiana, being North, 8240'21" East, 1192.51' from USC&GS Station
   "Saint 66". Serves as Unit Well for MV Big. "K" RA SU.
<PAGE>
 
                                   EXHIBIT A
                                                                   Page 56 of 64


3. Wm. Deichmann et al., Well #1. S/N 119971. Located 2,340' South of North Line
   & 250' West of East Line of, and in Sec. 28, T18S-R24E, Jefferson Parish,
   Louisiana, being North 84 West, 2,275' from USC&GS Station "St. Denis".
   Serves as Unit Well for MV Big. "Q" RA SU.

4. Wm. Deichmann et al., Well #2. S/N 121111. Located 2,167' South of North Line
   & 735' East of West line of, and in Sec. 27, T18S-R24E, Jefferson Parish,
   Louisiana. Serves as Unit Well for Big. "S" VU A.

5. Wm. Deichmann et al, Well #3. S/N 122813. Located 1,350' South of North Line
   & 330' East of West Line of, and in Sec. 27, T18S-R24E, Jefferson Parish,
   Louisiana, being North 3651'50" West of USC&GS Sta "Saint 66". Serves as Unit
   Well for MV Big. "O" SU.

6. Wm. Deichmann et al., Well #4. S/N 124286. Located 1,366' South of North Line
   & 863.36' West of East Line of, and in Sec. 28, T18S-R24E, Jefferson Parish,
   Louisiana, being North  6213'33"  West,  2,280.48'  from  USC&GS  Sta "Saint
   66". Serves as Unit Well for MV Big. "O" RA SU.

7. State Lease 4192, Well #3. S/N 108701. Located South 4134' West, 3,226.2'
   from USC&GS Sta "St. Denis" in T18S-R24E, Jefferson Parish, Louisiana.
   Produces as a Lease Well from the 14,400' Sand.

8. State Lease 4192, Well #4. S/N 117135.  Located South 6519'27" West,
   1,986.22' from USC&GS Sta "St. Denis" in T18S-R24E, Jefferson Parish,
   Louisiana.


                                      V.

                        MAJOR ITEMS OF OWNED EQUIPMENT

Quantity
--------

   1        Concrete Production Barge with cantilevered deck

   2        3,000-Bbl galvanized, bolted stock tanks

   1        1,500-Bbl galvanized, bolted stock tank

   6        4' x 22'6" National 75# WP Heater Treaters

   2        4' x 20' National 50# WP Recirculating Water Treaters

   1        6' x 28' National 50# WP Test Heater Treater

   6        24" x 5' Vertical Oil/Gas Separators, 125# WP

   3        20" x 7'6" BS&B Vert. Oil/Gas Separators, 1440# WP

   1        7' x 15' Vertical Oil/Gas Separator, 125# WP

   1        24" x 10' BS&B Vert. Gas/Water Separator. 480# WP. Scrubber at
            Compressor Inlet.

   1        24" x 18'6" BS&B Vert. Glycol Tower, 1440# WP, c/w IMM BTU Glycol
            Regenerator
<PAGE>
 
                                   EXHIBIT A
                                                                   Page 57 of 64


   3        2" x 12' Horiz Meter Runs w/ Daniel Jr Fittings & Barton Bellows-
            type gas meters.

   2        3" x 16' Horiz Meter Runs w/ Daniel Jr Fittings & Barton Bellows-
            type gas meters.

   1        Concrete Salt Water Disposal Deck Barge

   2        1,500-Bbl galvanized, bolted SW settling Tanks

   1        10' x 12' Dog House/Office Building

   1        8' x 9' Tool House w/ aluminum Sides
<PAGE>
 
                                   EXHIBIT A
                                                                   Page 58 of 64


                        BY FORMAN PETROLEUM CORPORATION

                                      I.

                          OIL, GAS AND MINERAL LEASES
                                 BOUTTE FIELD
                         ST. CHARLES PARISH, LOUISIANA


1. That certain Oil, Gas and Mineral Lease dated January 8, 1952, by Lydia B.
   Simoneaux et al, as Lessors, and The Texas Company, as Lessee, which lease is
   recorded in COB YYY, Folio 182, Entry No. 9119 of the Conveyance Records of
   St. Charles Parish, Louisiana, as amended by that certain instrument dated
   December 27, 1952, by Lydia B. Simoneaux et al and The Texas Company, of
   record in COB 4, Folio 342, Entry No. 10536 of the Conveyance Records of St.
   Charles Parish, Louisiana; and less and except the acreage described in that
   certain Compromise Agreement and Partial Release dated effective November 8,
   1963, by and between Texaco, Inc. et al, of record in COB 39, Folio 92, Entry
   No. 25144 of the Conveyance Records of St. Charles Parish, Louisiana.

2. That certain Oil, Gas and Mineral Lease dated January 8, 1952, between St.
   Charles Land Company, In Liquidation, as Lessor, and The Texas Company, as
   Lessee, of record in COB YYY, Folio 188, Entry No. 9120 of the Conveyance
   Records of St. Charles Parish, Louisiana, as amended by that certain
   instrument dated December 26, 1952, by and between the St. Charles Land
   Company, In Liquidation, and The Texas Company, of record in COB 4, Folio
   345, Entry No. 10537 of the Conveyance Records of St. Charles Parish,
   Louisiana; and less and except the acreage described in that certain
   Compromise Agreement and Partial Release dated effective November 8, 1963, by
   and between Texaco, Inc. et al, of record in COB 39, Folio 92, Entry No.
   25144 of the Conveyance Records of St. Charles Parish, Louisiana.

The Interest of Forman Petroleum Corporation in Oil, Gas and Mineral Leases Nos.
1 and 2 above is owned in Tracts A and B as Follows:


                                    TRACT A


  The South Half of Southeast Quarter (S/2 of SE/4), and the Southwest Quarter
  (SW/4) of Section 17; the Southeast Quarter (SE/4) and the Southeast Quarter
  of Southwest Quarter (SE/4 of SW/4) of Section 18; All of Section 19; All of
  Section 20; the West Half of West Half (W/2 of W/2) and the East Half of
  Northwest Quarter (E/2 of NW/4) of Section 21; the Northwest Quarter of
  Northwest Quarter (NW/4 of NW/4) of Section 28; the North Half (N/2) of
  Section 29; and the North Half (N/2) of Section 30, all in Township 14 South,
  Range 21 East, St. Charles Parish, Louisiana, LESS AND EXCEPT the East Half of
  the Northwest Quarter (E/2 of NW/4) of Section 21, Township 14 South, Range 21
  East, St. Charles Parish, Louisiana (Tract B below).

     LEASE OPERATING INTEREST                 .50000000

     LEASE NET REVENUE INTEREST               .42968750


                    The East Half of the Northwest Quarter
                (E/2 of NW/4) of Section 21, Township 14 South,
                 Range 21 East. St. Charles Parish. Louisiana


     OPERATING INTEREST                       .50000000
<PAGE>
 
                                   EXHIBIT A
                                                                   Page 59 of 64


     NET REVENUE INTEREST                     .40625000


                                     UNITS

                           Subject to the following
                   drilling and production units, created by
                    Department of Conservation or Office of
                  Conservation Orders and/or Voluntary Units:

1. By instrument dated January 4, 1960, recorded on April 20, 1960, in
   Conveyance Book 26, Folio 475, Entry No. 20109, executed by and between
   Texaco Inc., Pan American Petroleum Corporation et al a 40 acre production
   unit was created for the Robulus #1 Zone (being that zone encountered between
   the electric log depths of 10262' through 10415' in The Texas Company's (now
   Texaco Inc.) Rathborne #3 Well located in Section 18, Township 14 South,
   Range 21 East, St. Charles Parish, Louisiana, inclusive of the mineral leases
   covering the subject property. (30 acres).

2. A plat for Texaco Inc.'s Boutte Field, St. Charles Parish, Louisiana, Main
   Pay R 100 SUA, created by Office of Conservation Order No. 605-H, dated
   November 22, 1982, was registered on February 14, 1983, in Conveyance Book
   293, Folio 763, Entry No. 93337 of the records of St. Charles Parish,
   Louisiana.

3. A plat for Texaco Inc.'s Boutte Field, St. Charles Parish, Louisiana, ROB L
   RA SUA created by Office Of Conservation Order No. 605-L dated August 17,
   1989, was registered on November 2, 1989, in Conveyance Book 417, Folio 166,
   Entry No. 147127, of the records of St. Charles Parish, Louisiana.

4. The Rathborne 2 Sand, Sand Unit A and Sand Unit B, created by Department of
   Conservation Order No. 605-D dated November 22, 1965, effective November 1,
   1965, Boutte Field, St. Charles Parish, Louisiana.

5. Supplement to Office of Conservation Order No. 605-D, dated May 9, 1979,
   effective May 9, 1979, Boutte Field, St. Charles Parish, Louisiana.

6. The Rathborne 2 Sand, Reservoir A, Sand Unit C, created by Department of
   Conservation Order No. 605-D-1, dated November 25, 1975, effective November
   1, 1975, Boutte Field, St. Charles Parish, Louisiana.

7. The Simoneaux 10 Sand, Sand Unit A, Sand Unit B, and Sand Unit C, created by
   Department of Conservation Order No. 605-E, dated November 22, 1965,
   effective Nov  ember 1, 1965, Boutte Field, St. Charles Parish, Louisiana.

8. Supplement to Office of Conservation Order No. 605-E, dated June 28, 1979,
   effective June 28, 1979, Boutte Field, St. Charles Parish, Louisiana.

9. The Simoneaux 10 Sand, Sand Unit D, created by Department of Conservation
   Order No. 605-E-l, dated November 15, 1966, effective December 1, 1966,
   Boutte Field, St. Charles Parish, Louisiana.

10. Supplement to Department of Conservation Order No. 605-E-l, dated January 3,
    1977, effective January 3, 1977, Boutte Field, St. Charles Parish,
    Louisiana.

11. The Simoneaux 10 Sand, Reservoir A, Sand Unit A, created by Department of
    Conservation Order No. 605-E-2, dated November 25, 1975, effective 
    November 1, 1975, Boutte Field, St. Charles Parish, Louisiana. This order
    also dissolved Simoneaux 10 Sand 

<PAGE>
 
                                   EXHIBIT A
                                                                   Page 60 of 64

    Unit A and Simoneaux Sand Unit B created by Department of Conservation Order
    No. 605-E.

12. Supplement to Office of Conservation Order No. 605-E-2, dated July 25, 1980,
    effective July 25, 1980, Boutte Field, St. Charles Parish, Louisiana.

13. The 10000 Foot Sand, Reservoir A, Sand Unit A, created by Department of
    Conservation Order No. 605-F, dated December 28, 1979, effective December
    13, 1979, Boutte Field, St. Charles Parish, Louisiana.

14. Supplement to Department of Conservation Order No. 605-F, dated March 12,
    1985, effective March 12, 1985, Boutte Field, St. Charles Parish, Louisiana.

15. Supplement to Department of Conservation Order No. 605-F, dated December 28,
    1989, effective December 28, 1989, Boutte Field, St. Charles Parish,
    Louisiana.

16. The Simoneaux 4 Sand, Reservoir A, Sand Unit A, created by Department of
    Conservation Order No. 605-G, dated February 13, 1981, effective October 21,
    1980, Boutte Field, St. Charles Parish, Louisiana.

     Unit Operating Interest  -     .7622699  - Unit NRI -   .5731162

17. Supplement to Department of Conservation Order No. 605-G, dated December 28,
    1989, effective December 28, 1989, Boutte Field, St. Charles Parish,
    Louisiana.

18. The Main Pay Sand Reservoir 100, Sand Unit A, created by Department of
    Conservation Order No. 605-H, dated November 22, 1982, effective September
    29, 1982, Boutte Field, St. Charles Parish, Louisiana.

19. Supplement to Department of Conservation Order No. 605-H, dated January 6,
    1986, effective January 6, 1986, Boutte Field, St. Charles Parish,
    Louisiana.

20. Supplement to Department of Conservation Order No. 605-H, dated December 31,
    1984, effective December 31, 1984, Boutte Field, St. Charles Parish,
    Louisiana.

21. The Simoneaux 2C Sand, Reservoir A, Sand Unit B, created by Department of
    Conservation Order No. 605-J, dated October 30, 1985, effective September
    25, 1985, Boutte Field, St. Charles Parish, Louisiana.

22. The Simoneaux 2B Sand, Reservoir A, Sand Unit A, created by Department of
    Conservation Order 605-K, dated February 18, 1987, effective February 10,
    1987, Boutte Field, St. Charles Parish, Louisiana.

23. The ROB-L Sand, Reservoir A, Sand Unit A, created by Department of
    Conservation Order 605-L, dated August 17, 1989, effective August 8, 1989,
    Boutte Field, St. Charles Parish, Louisiana.


                                      II.

                          OIL, GAS AND MINERAL LEASE
                                 BOUTTE FIELD
                         ST. CHARLES PARISH. LOUISIANA


That certain Oil, Gas and Mineral Lease dated March 31, 1952, by Joseph
Rathborne Land and Lumber Company, Inc., as Lessor, and The California Company,
as Lessee, of record in COB 
<PAGE>
 
                                   EXHIBIT A
                                                                   Page 61 of 64


ZZZ, Folio 180, Entry No. 9317 of the Conveyance Records of St. Charles Parish,
Louisiana, LESS AND EXCEPT the lands covered by those certain Partial Releases
as follows:

(1)  Dated February 6, 1970, by and between Chevron Oil Company et al and
     Rathborne Land Company, Inc., unrecorded, releasing the following described
     280.33 acres, more or less:

Those portions of Sections 8, 17 and 18, Township 14 South, Range 21 East,
Southeastern Land District West of the Mississippi River, St. Charles Parish,
Louisiana, described as follows:

Beginning at the Southeast corner of the North one-half of Section 18, Township
14 South, Range 21 East; thence South 89 degrees 16 minutes West 660.0 feet;
thence North 330.0 feet; thence East 657.7 feet; thence North 0 degrees 23
minutes West 244.4 feet; thence North 89 degrees 16 minutes East 2,030.0 feet;
thence North 330.0 feet; thence East 610.0 feet; thence North 330.0 feet; thence
East 330.0 feet; thence North 1,270.0 feet; thence East 330.0 feet; thence North
171.4 feet; thence North 89 degrees 16 minutes East 690.0 feet; thence North
160.0 feet; thence East 630.0 feet; thence North 200.0 feet; thence East 330.0
feet; thence North 300.0 feet; thence East 294.7 feet; thence South 0 degrees 23
minutes East 4,620.4 feet; thence South 89 degrees 16 minutes West 2,631.5 feet;
thence North 0 degrees 23 minutes West 1,325.5 feet; thence South 89 degrees 16
minutes West 2,631.5 feet to the place of beginning, containing 280.33 acres
more or less.

(2)  Dated February 13, 1978, effective February 7, 1978, by and between Chevron
     USA, Inc. et al and Rathborne Land Company, Inc., of record in COB 205,
     Folio 564, Entry No. 61635 of the Conveyance Records of St. Charles Parish,
     Louisiana; and

(3)  Dated January 8, 1982, by and between Chevron USA, Inc. et al and Rathborne
     Land Company, Inc., of record in COB 276, Folio 518, Entry No. 86878 of the
     Conveyance Records of St. Charles Parish, Louisiana.

LEASE OPERATING INTEREST                         1.00000000

LEASE NET REVENUE INTEREST                        .70312500
<PAGE>
 
                                   EXHIBIT A
                                                                   Page 62 of 64


                                     UNITS
                                     
                           Subject to the following
                   drilling and production units, created by
                    Department of Conservation or Office of
                  Conservation Orders and/or Voluntary Units:


1. By instrument dated January 4, 1960, recorded on April 20, 1960, in
   Conveyance Book 26, Folio 475, Entry No. 20109, executed by and between
   Texaco, Inc., Pan American Petroleum Corporation et al a 40 acre production
   unit was created for the Robulus #1 Zone (being that zone encountered between
   the electric log depths of 10262' through 10415' in the Texas Company's (now
   Texaco Inc.) Rathborne #3 Well located in Section 18, Township 14 South,
   Range 21 East, St. Charles Parish, Louisiana, inclusive of the mineral leases
   covering the subject property. (10 acres).

2. A plat for Texaco Inc.'s Boutte Field, St. Charles Parish, Louisiana, Main
   Pay R 100 SUA, created by Office of Conservation Order No. 605-H, dated
   November 22, 1982, was registered on February 14, 1983, in Conveyance Book
   293, Folio 763, Entry No. 93337 of the records of St. Charles Parish,
   Louisiana.

3. A plat of Texaco Inc.'s Boutte Field, St. Charles Parish, Louisiana, ROB L RA
   SUA, created by Office Of Conservation Order No. 605-L dated August 17, 1989,
   was registered on November 2, 1989, in Conveyance Book 417, Folio 166, Entry
   No. 147127, of the records of St. Charles Parish, Louisiana.

4. The Rathborne 2 Sand, Sand Unit A and Sand Unit B, created by Department of
   Conservation Order No. 605-D dated November 22, 1965, effective November 1,
   1965, Boutte Field, St. Charles Parish, Louisiana.

5. Supplemental to Office of Conservation Order No. 605-D, dated May 9, 1979,
   effective May 9, 1979, Boutte Field, St. Charles Parish, Louisiana.

6. The Simoneaux 10 Sand, Sand Unit A, Sand Unit B, and Sand Unit C, created by
   Department of Conservation Order No. 605-E, dated November 22, 1965,
   effective November 1, 1965, Boutte Field, St. Charles Parish, Louisiana.

7. The Simoneaux 10 Sand, Sand Unit D, created by Department of Conservation
   Order No. 605-E-1, dated November 15, 1966, effective December 1, 1966,
   Boutte Field, St. Charles Parish, Louisiana.

8. Supplement to Department of Conservation Order No. 605-E-l, dated January 3,
   1977, effective January 3, 1977, Boutte Field, St. Charles Parish, Louisiana.

9. The 10000 Foot Sand, Reservoir A, Sand Unit A, created by Department of
   Conservation Order No. 605-F, dated December 28, 1979, effective December 13,
   1979, Boutte Field, St. Charles Parish, Louisiana.

          Unit Operating Interest - .7588295 - Unit NRI - .5712350

10. Supplement to Department of Conservation Order No. 605-F, dated March 12,
    1985, effective March 12, 1985, Boutte Field, St. Charles Parish, Louisiana.

11. Supplement to Department of Conservation Order No. 605-F, dated December 28,
    1989, effective December 28, 1989, Boutte Field, St. Charles Parish,
    Louisiana.
<PAGE>
 
                                   EXHIBIT A
                                                                   Page 63 of 64


12. The Simoneaux 4 Sand, Reservoir A, Sand Unit A, created by Department of
    Conservation Order No. 605-G, dated February 13, 1981, effective October 21,
    1980, Boutte Field, St. Charles Parish, Louisiana.

13. Supplement to Department of Conservation Order No. 605-G, dated December 28,
    1989, effective December 28, 1989, Boutte Field, St. Charles Parish,
    Louisiana.

14. The Main Pay Sand Reservoir 100, Sand Unit A, created by Department of
    Conservation Order No. 605-H, dated November 22, 1982, effective September
    29, 1982, Boutte Field, St. Charles Parish, Louisiana.

15. Supplement to Department of Conservation Order No. 605-H, dated January 6,
    1986, effective January 6, 1986, Boutte Field, St. Charles Parish,
    Louisiana.

16. Supplement to Department of Conservation Order No. 605-H, dated December 31,
    1984, effective December 31, 1984, Boutte Field, St. Charles Parish,
    Louisiana.

17. The Simoneaux 2C Sand, Reservoir A, Sand Unit B, created by Department of
    Conservation Order No. 605-J, dated October 30, 1985, effective September
    25, 1985, Boutte Field, St. Charles Parish, Louisiana.

18. The Simoneaux 2B Sand, Reservoir A, Sand Unit A, created by Department of
    Conservation Order 605-K, dated February 18, 1987, effective February 10,
    1987, Boutte Field, St. Charles Parish, Louisiana.

19. The ROB-L Sand, Reservoir A, Sand Unit A, created by Department of
    Conservation Order 605-L, dated August 17, 1989, effective August 8, 1989,
    Boutte Field, St. Charles Parish, Louisiana.


                                     III.

                                 SURFACE LEASE
                                 BOUTTE FIELD
                         ST. CHARLES PARISH. LOUISIANA


     That certain Surface Lease dated July 3, 1990, by Gerard M. Simoneaux et
     al, as Lessors, to Texaco, Inc., as Lessee, of record in COB 428, Folio
     127, Entry No. 152744 of the Conveyance Records of St. Charles Parish,
     Louisiana.
<PAGE>
 
                                   EXHIBIT A
                                                                   Page 64 of 64


(All recording references in this Exhibit "A" are to the records of Terrebonne
Parish, Louisiana.)

                           OIL GAS AND MINERAL LEASE

     Oil, Gas and Mineral Lease dated December 20, 1985, by Tenneco Oil Company,
     as Lessor, to Amoco Production Company, as Lessee, a declaration of which
     being of record in Conveyance Book 1043, folio 660, Entry No. 774829, as
     amended by Amendment to Lease dated March 30, 1987, of record in COB 1100,
     folio 493, Entry No. 804214.

                                     UNITS

Subject to the following drilling and production units created by the Department
of Conservation or the Office of Conservation Orders:

     1. Tex W-10 RA SU A created by Order No. 898-G effective February 9, 1988,
        supplemented August 3, 1993 (COB 1379, folio 700, Entry No. 922193),
        Bayou Dularge Field, Terrebonne Parish, Louisiana.

     2. Duval RB SU A created by Order No. 898-C-1 effective February 2, 1988,
        Bayou Dularge Field, Terrebonne Parish, Louisiana.

     3. Tex W-12A RA SU A, created by Order No. 898-H, effective February 9,
        1988, Bayou Dularge Field, Terrebonne Parish, Louisiana.


                                      II.

                                SURFACE RIGHTS

     Boat Dockage Lease dated May 19, 1993, by Bayou Dularge Marina for a term
     ending May 31, 1998.