Document:

Filed by Bowne Pure Compliance

 

Exhibit 10.6(a)

EXECUTION COPY

 

GMX RESOURCES, INC.

$30,000,000

SENIOR SUBORDINATED SECURED NOTES

NOTE PURCHASE AGREEMENT

Dated as of July 31, 2007

 

 

 

TABLE OF CONTENTS

(Not Part of Agreement)

	 	 	 	 	 	 	 	 	 	 	 
	 	 	 	 	 	 	 	 	Page
	1.	 	AUTHORIZATION OF ISSUE OF NOTES	 	 	1	 
	 	 	1A.	 	Authorization of Issue of Series A Notes	 	 	1	 
	 
	 	 	 	 	 	 	 	 	 	 
	2.	 	PURCHASE AND SALE OF SERIES A NOTES AND ADDITIONAL NOTES	 	 	1	 
	 

	 	2A.
	 	Closing
	 	 	 	 	1	 
	 

	 	 	 	2A(1).
	 	Series A Closing
	 	 	1	 
	 

	 	 	 	2A(2).
	 	Additional Series of Notes
	 	 	2	 
	 	 	2B.	 	Structuring Fee	 	 	3	 
	 	 	2C.	 	Additional Floating Rate Provisions	 	 	3	 
	 

	 	 	 	2C(1).
	 	Loan Procedures; Interest on Floating Rate Notes
	 	 	3	 
	 

	 	 	 	2C(2).
	 	Breakage Cost Indemnity
	 	 	4	 
	 

	 	 	 	2C(3).
	 	Reserve Requirements; Change in Circumstances
	 	 	5	 
	 

	 	 	 	2C(4).
	 	Illegality
	 	 	6	 
	 

	 	 	 	2C(5).
	 	Inability to Determine Interest Rate
	 	 	6	 
	 
	 	 	 	 	 	 	 	 	 	 
	3.	 	CONDITIONS OF CLOSING	 	 	7	 
	 	 	3A.	 	Certain Documents	 	 	7	 
	 	 	3B.	 	Opinion of Purchasers’ Special Counsel	 	 	10	 
	 	 	3C.	 	Representations and Warranties; No Material Adverse Change; No Default	 	 	10	 
	 	 	3D.	 	Purchase Permitted by Applicable Laws	 	 	11	 
	 	 	3E.	 	Legal Matters	 	 	11	 
	 	 	3F.	 	Payment of Fees	 	 	11	 
	 	 	3G.	 	Proceedings	 	 	11	 
	 	 	3H.	 	Private Placement Numbers	 	 	11	 
	 	 	3I.	 	Certain Additional Conditions to Issuance of Additional Notes	 	 	11	 
	 

	 	 	 	3I(1).
	 	Compliance Certificate
	 	 	12	 
	 

	 	 	 	3I(2).
	 	Execution and Delivery of Supplement
	 	 	12	 
	 

	 	 	 	3I(3).
	 	Representations of Additional Purchasers
	 	 	12	 
	 
	 	 	 	 	 	 	 	 	 	 
	4.	 	PREPAYMENTS	 	 	12	 
	 	 	4A.	 	Required Prepayments in the Case of Certain Asset Dispositions	 	 	12	 
	 	 	4B.	 	Optional Prepayments	 	 	12	 
	 

	 	 	 	4B(1).
	 	Optional Prepayment of Fixed Rate Notes with Yield-Maintenance Amount
	 	 	12	 
	 

	 	 	 	4B(2).
	 	Optional Prepayment of Floating Rate Notes
	 	 	12	 
	 	 	4C.	 	Notice of Optional Prepayment	 	 	13	 
	 	 	4D.	 	Offer to Prepay Notes in the Event of a Change in Control or a Change in Management	 	 	13	 
	 	 	4E.	 	Application of Prepayments	 	 	15	 
	 	 	4F.	 	Retirement of Notes	 	 	15	 

 

i

 

	 	 	 	 	 	 	 	 	 	 	 
	 	 	 	 	 	 	 	 	Page
	5.	 	AFFIRMATIVE COVENANTS	 	 	15	 
	 	 	5A.	 	Financial Statements; Notice of Defaults	 	 	15	 
	 	 	5B.	 	Information Required by Rule 144A	 	 	18	 
	 	 	5C.	 	Inspection of Property	 	 	19	 
	 	 	5D.	 	Covenant to Secure and Guarantee Notes Equally	 	 	19	 
	 	 	5E.	 	Compliance with Laws	 	 	19	 
	 	 	5F.	 	Insurance	 	 	19	 
	 	 	5G.	 	Maintenance of Existence	 	 	20	 
	 	 	5H.	 	Payment of Taxes	 	 	20	 
	 	 	5I.	 	Operation and Maintenance of Property	 	 	20	 
	 	 	5J.	 	Environmental Covenants	 	 	21	 
	 	 	5K.	 	Environmental Indemnities	 	 	21	 
	 	 	5L.	 	Additional Oil and Gas Properties	 	 	22	 
	 	 	5M.	 	Hedging Arrangements	 	 	22	 
	 	 	5N.	 	Lockbox Account	 	 	23	 
	 	 	5O.	 	Further Assurances	 	 	23	 
	 
	 	 	 	 	 	 	 	 	 	 
	6.	 	NEGATIVE COVENANTS	 	 	24	 
	 	 	6A.	 	Financial Covenants	 	 	24	 
	 

	 	 	 	6A(1).
	 	Adjusted PV10 to Total Debt
	 	 	24	 
	 

	 	 	 	6A(2).
	 	Total Debt to EBITDA Ratio
	 	 	25	 
	 

	 	 	 	6A(3).
	 	Interest Coverage
	 	 	25	 
	 

	 	 	 	6A(4).
	 	Tangible Net Worth
	 	 	25	 
	 	 	6B.	 	Restricted Payments	 	 	25	 
	 	 	6C.	 	Liens	 	 	26	 
	 	 	6D.	 	Indebtedness	 	 	27	 
	 	 	6E.	 	Loans, Advances, Investments and Contingent Liabilities	 	 	28	 
	 	 	6F.	 	Merger, Consolidation, Etc	 	 	30	 
	 	 	6G.	 	Sale of Assets, Etc	 	 	31	 
	 	 	6H.	 	Sale or Discount of Receivables	 	 	31	 
	 	 	6I.	 	Line of Business	 	 	32	 
	 	 	6J.	 	Terrorism Sanctions Regulations	 	 	32	 
	 	 	6K.	 	Related Party Transactions	 	 	32	 
	 	 	6L.	 	Issuance of Stock by Subsidiaries	 	 	32	 
	 	 	6M.	 	Subsidiary Restrictions	 	 	32	 
	 	 	6N.	 	Maintenance of Credit Facility	 	 	33	 
	 	 	6O.	 	Swap Agreements	 	 	33	 
	 	 	6P.	 	Prohibition Against Layering	 	 	33	 
	 	 	6Q.	 	Qualified Redeemable Preferred Stock	 	 	33	 
	 	 	6R.	 	Limitation on Number of Drilling Rigs	 	 	33	 
	 
	 	 	 	 	 	 	 	 	 	 
	7.	 	EVENTS OF DEFAULT	 	 	33	 
	 	 	7A.	 	Acceleration	 	 	33	 
	 	 	7B.	 	Rescission of Acceleration	 	 	37	 
	 	 	7C.	 	Notice of Acceleration or Rescission	 	 	37	 
	 	 	7D.	 	Other Remedies	 	 	37	 

 

ii

 

	 	 	 	 	 	 	 	 	 	 	 
	 	 	 	 	 	 	 	 	Page
	8.	 	REPRESENTATIONS, COVENANTS AND WARRANTIES	 	 	38	 
	 	 	8A.	 	Organization	 	 	38	 
	 	 	8B.	 	Financial Statements	 	 	38	 
	 	 	8C.	 	Actions Pending	 	 	38	 
	 	 	8D.	 	Outstanding Debt	 	 	39	 
	 	 	8E.	 	Title to Properties; Mortgaged Properties	 	 	39	 
	 	 	8F.	 	Taxes	 	 	39	 
	 	 	8G.	 	Conflicting Agreements and Other Matters	 	 	39	 
	 	 	8H.	 	Offering of Notes	 	 	40	 
	 	 	8I.	 	Use of Proceeds	 	 	40	 
	 	 	8J.	 	ERISA	 	 	40	 
	 	 	8K.	 	Governmental Consent	 	 	41	 
	 	 	8L.	 	Compliance with Laws	 	 	41	 
	 	 	8M.	 	Environmental Compliance	 	 	41	 
	 	 	8N.	 	Foreign Assets Control Regulations, Etc.	 	 	41	 
	 	 	8O.	 	Utility Company Status	 	 	42	 
	 	 	8P.	 	Investment Company Status	 	 	42	 
	 	 	8Q.	 	Disclosure	 	 	42	 
	 	 	8R.	 	Solvency	 	 	42	 
	 	 	8S.	 	Hostile Tender Offers	 	 	42	 
	 	 	8T.	 	Rule 144A	 	 	42	 
	 	 	8U.	 	Delivery of Bank Agreement	 	 	42	 
	 
	 	 	 	 	 	 	 	 	 	 
	9.	 	REPRESENTATIONS OF THE PURCHASERS	 	 	43	 
	 	 	9A.	 	Nature of Purchase	 	 	43	 
	 	 	9B.	 	Source of Funds	 	 	43	 
	 	 	9C.	 	Independent Investigation	 	 	44	 
	 
	 	 	 	 	 	 	 	 	 	 
	10.	 	DEFINITIONS; ACCOUNTING MATTERS	 	 	45	 
	 	 	10A.	 	Yield-Maintenance Terms	 	 	45	 
	 	 	10B.	 	Other Terms	 	 	46	 
	 	 	10C.	 	Accounting Principles, Terms and Determinations	 	 	63	 
	 
	 	 	 	 	 	 	 	 	 	 
	11.	 	MISCELLANEOUS	 	 	64	 
	 	 	11A.	 	Note Payments	 	 	64	 
	 	 	11B.	 	Expenses	 	 	64	 
	 	 	11C.	 	Consent to Amendments	 	 	65	 
	 	 	11D.	 	Form, Registration, Transfer and Exchange of Notes; Lost Notes	 	 	66	 
	 	 	11E.	 	Persons Deemed Owners; Participations	 	 	66	 
	 	 	11F.	 	Survival of Representations and Warranties; Entire Agreement	 	 	67	 
	 	 	11G.	 	Successors and Assigns	 	 	67	 
	 	 	11H.	 	Independence of Covenants	 	 	67	 
	 	 	11I.	 	Notices	 	 	67	 

 

iii

 

	 	 	 	 	 	 	 	 	 	 	 
	 	 	 	 	 	 	 	 	Page
	 	 	11J.	 	Payments Due on Non-Business Days	 	 	67	 
	 	 	11K.	 	Severability	 	 	68	 
	 	 	11L.	 	Descriptive Headings	 	 	68	 
	 	 	11M.	 	Satisfaction Requirement	 	 	68	 
	 	 	11N.	 	Governing Law	 	 	68	 
	 	 	11O.	 	Severalty of Obligations	 	 	68	 
	 	 	11P.	 	Counterparts	 	 	68	 
	 	 	11Q.	 	Binding Agreement	 	 	68	 
	 	 	11R.	 	Waiver of Jury Trial; Consent to Jurisdiction	 	 	69	 

	 	 	 	 	 
	PURCHASER SCHEDULE
	SCHEDULE 6C

	 	—

	 	EXISTING LIENS
	SCHEDULE 6D

	 	—
	 	EXISTING INVESTMENTS
	SCHEDULE 8G

	 	—

	 	LIST OF AGREEMENTS RESTRICTING INDEBTEDNESS
	 
	 	 	 	 
	EXHIBIT A-1

	 	—

	 	FORM OF SERIES A NOTE
	EXHIBIT A-2

	 	—

	 	FORM OF FIXED RATE NOTE
	EXHIBIT A-3

	 	—

	 	FORM OF FLOATING RATE NOTE
	EXHIBIT B

	 	—

	 	FORM OF OPINION OF COMPANY’S COUNSEL
	EXHIBIT C

	 	—

	 	FORM OF FUNDS DELIVERY INSTRUCTION LETTER
	EXHIBIT D

	 	—

	 	FORM OF SUPPLEMENT
	EXHIBIT E

	 	—

	 	FORM OF COLLATERAL AGENCY AGREEMENT
	EXHIBIT F

	 	—

	 	FORM OF DEPOSIT ACCOUNT CONTROL AGREEMENT
	EXHIBIT G

	 	—

	 	FORM OF DIRECTION LETTER
	EXHIBIT H

	 	—

	 	FORM OF GUARANTY AGREEMENT
	EXHIBIT I

	 	—

	 	FORM OF INTERCREDITOR AGREEMENT
	EXHIBIT J

	 	—

	 	FORM OF LETTER-IN-LIEU
	EXHIBIT K

	 	—

	 	FORM OF PLEDGE AGREEMENT
	EXHIBIT L

	 	—

	 	FORM OF SECURITY AGREEMENT
	EXHIBIT M

	 	—

	 	FORM OF COMPLIANCE CERTIFICATE

 

iv

 

GMX Resources, Inc.

9400 North Broadway, Suite 600

Oklahoma City, Oklahoma 73114

As of July 31, 2007

To each of the Persons named in

  the Purchaser Schedule attached

  hereto as purchasers of the

  Series A Notes (the “Series A

  Purchasers” and, together with

  any Additional Purchasers, the

  “Purchasers”)

Ladies and Gentlemen:

The undersigned, GMX Resources, Inc., an Oklahoma corporation (the “Company”), hereby agrees
with you as follows:

1. AUTHORIZATION OF ISSUE OF NOTES.

1A. Authorization of Issue of Series A Notes. Subject to the terms and conditions of this
Agreement, the Company will issue and sell to each Series A Purchaser and each Series A Purchaser
will purchase from the Company, at the Series A Closing provided for in paragraph 2A(1), senior
subordinated fixed rate secured term promissory notes (the “Series A Notes”) in the principal
amount specified opposite such Series A Purchaser’s name on the Purchaser Schedule attached hereto
at the purchase price of 100% of the principal amount thereof.

The term “Notes” as used herein shall include the Series A Notes and any Additional Notes.
Notes which have (i) the same final maturity, (ii) the same principal prepayment dates, (iii) the
same principal prepayment amounts (as a percentage of the original principal amount of each Note),
(iv) the same interest rate (in the case of Fixed Rate Notes), (v) the same Applicable Margin (in
the case of Floating Rate Notes), (vi) the same interest type (floating or fixed) and (vii) the
same original date of issuance are herein called a “Series” of Notes. Capitalized terms used
herein have the meanings specified in paragraph 10.

2. PURCHASE AND SALE OF SERIES A NOTES AND ADDITIONAL NOTES.

2A. Closing.

2A(1). Series A Closing. The Company hereby agrees to sell to the Series A
Purchasers and, subject to the terms and conditions herein set forth, each Series A Purchaser
agrees to purchase from the Company in the aggregate principal amounts set forth opposite its name
on the Purchaser Schedule attached hereto at 100% of such aggregate principal amounts. The
Series A Notes shall be substantially in the form of Exhibit A-1 attached hereto. The
Company will deliver to the Series A Purchasers, at the offices of Baker Botts L.L.P. at 2001 Ross Avenue, Suite 600, Dallas, Texas 75201, one or more Series A Notes registered in the name
of the Series A Purchasers, evidencing the aggregate principal amount of Series A Notes to be
purchased by the Series A Purchasers and in the denomination or denominations specified in the
Purchaser Schedule attached hereto against payment of the purchase price thereof by
transfer of immediately available funds to the credit of the Company’s account #3620097607 at
Capital One, National Association, 5718 Westheimer Road, Suite 600, Houston, TX (ABA Routing Number
111901014) on the date of closing, which shall be July 31, 2007, or any other date upon which the
Company and the Series A Purchasers may mutually agree in writing (the “Series A Closing”).

 

 

 

2A(2). Additional Series of Notes. The Company may, from time to time, with the
consent of the Series A Purchasers and the Required Holders and subject to the terms hereof, issue
and sell one or more additional Series of (I) its senior subordinated fixed rate secured promissory
notes (together with the Series A Notes, the “Fixed Rate Notes”) or (II) its senior subordinated
floating rate secured promissory notes (the “Floating Rate Notes”) under the provisions of this
Agreement pursuant to a supplement (a “Supplement”) substantially in the form of Exhibit D.
Each additional Series of Notes (either as a Fixed Rate Note or Floating Rate Note, the
“Additional Notes”) issued pursuant to a Supplement shall be subject to the following terms and
conditions:

(i) each Series of Additional Notes, when so issued, shall be differentiated
from all previous series by sequential alphabetical designation inscribed thereon;

(ii) each Series of Additional Notes, when so issued, shall be further
differentiated from all previous series by either a Fixed Rate Note or Float Rate Note
designation inscribed thereon;

(iii) each Series of Additional Notes shall be dated the date of issue, bear
interest at such rate (including method of calculation), mature on such date, be subject to
such mandatory and optional prepayment on the dates and with such Yield-Maintenance Amounts,
if any, have such additional or different conditions precedent to closing, such
representations and warranties and such additional covenants as shall be specified in the
Supplement under which such Additional Notes are issued and upon execution of any such
Supplement, this Agreement shall be deemed amended to reflect such additional covenants and
agreements which are in addition to, or more restrictive than, the covenants and agreements
to which the Company is subject pursuant to this Agreement without further action on the
part of the holders of the Notes outstanding under this Agreement, provided, that any
additional covenants and agreements shall inure to the benefit of all holders of Notes so
long as any Additional Notes issued pursuant to such Supplement remain outstanding and such
additional covenants and agreements shall not otherwise amend or modify the covenants and
agreements to which the Company is subject pursuant to this Agreement;

(iv) each Series of Additional Notes issued under this Agreement shall, at the
election of the Company, be in substantially the form of either Exhibit A-2 (Fixed
Rate
Note) or Exhibit A-3 (Floating Rate Note) attached hereto with such variations,
omissions and insertions as are necessary or permitted hereunder;

 

2

 

(v) the minimum aggregate principal amount of any Series of Notes issued under
a Supplement shall be $10,000,000; and

(vi) no Additional Notes shall be issued hereunder if at the time of issuance
thereof and after giving effect to the application of the proceeds thereof, any Default or
Event of Default shall have occurred and be continuing.

2B. Structuring Fee. In consideration for the time, effort and expense involved in the
preparation, negotiation and execution of this Agreement, at the time of the Series A Closing the
Company will pay to Prudential Management Investment, Inc. (“PIMI”), in immediately available
funds, a fee (the “Structuring Fee”) pursuant to the terms and conditions of that certain letter
agreement dated June 4, 2007 by and between the Company and PIMI.

2C. Additional Floating Rate Provisions.

2C(1). Loan Procedures; Interest on Floating Rate Notes.

(i) In an irrevocable telephonic notice (confirmed by written notice received
within one day after such telephonic notice) to each holder of Floating Rate Notes no later
than 11:00 A.M. New York City time on the third Business Day prior to the first day of an
Interest Period the Company shall elect (a) whether the Loans are to be LIBOR Loans or Prime
Loans and (b) if the Loans are to be LIBOR Loans, the applicable Interest Period or Interest
Periods; provided that (I) at any time, no more than five Interest Periods may be in
effect per Series of Floating Rate Notes outstanding at such time and (II) in no event shall
the aggregate principal amount of Loans for any Interest Period be less than $500,000.

(ii) Subject to the terms and conditions hereof, the Company may elect from
time to time to convert LIBOR Loans to Prime Loans or Prime Loans to LIBOR Loans by giving
an irrevocable telephonic notice (confirmed by written notice received within one day after
such telephonic notice) to each holder of Floating Rate Notes no later than 11:00 A.M. New
York City time on the third Business Day prior to the effective date of such election, which
effective date shall be the last day of the applicable Interest Period for such Loans. Any
such notice concerning conversions to LIBOR Loans shall specify the length of the initial
Interest Period or Interest Periods therefor.

(iii) If the Company has failed to elect a new Loan Type and Interest Period
or Interest Periods for the Loans in a timely manner, the Company shall be deemed to have
elected (a) to continue LIBOR Loans as LIBOR Loans having an Interest Period or Interest
Periods equal to that of the Interest Period or Interest Periods immediately preceding such
new Interest Period or Interest Periods, and (b) to continue Prime Loans as Prime Loans.
All Interest Periods for the Loans shall be deemed to end on the earliest of (I) the
maturity date of the Floating Rate Note having the latest maturity date, (II) the
date the Loans become due and payable pursuant to paragraph 7A or (III) the Proposed
Prepayment Date, with respect to Floating Rate Notes prepaid pursuant to paragraph 4D.

 

3

 

(iv) Notwithstanding any of the foregoing, if an Event of Default has occurred
or is continuing as of the end of any Interest Period, then the Company shall be deemed to
have elected (a) to convert LIBOR Loans to Prime Loans and (b) to continue Prime Loans as
Prime Loans.

(v) Interest on the Floating Rate Notes shall (a) be payable (I) on the last
day of each Interest Period, which, except as otherwise provided in the definition of
“Interest Period” set forth in paragraph 10B, shall be, (A) with respect to any LIBOR Loan,
the day numerically corresponding to the commencement date of such LIBOR Loan in the
calendar month that is one, three or six months thereafter, in each case as the Company may
specify or be deemed to specify (provided that in the case of an Interest Period with
respect to any LIBOR Loan in excess of three months, interest shall also be payable on the
day which occurs three months after the first day of such Interest Period), and (B) with
respect to any Prime Loan, the last day of March, June, September or December, as
applicable, next succeeding the commencement date of such Prime Loan, (II) on the date of
any prepayment (on the amount prepaid), (III) at maturity (whether by acceleration or
otherwise) and (IV) after such maturity, on demand and (b) be computed on the actual number
of days elapsed over, in the case of any LIBOR Loan, a year of 360 days and, in the case of
any Prime Loan, a year of 365 or 366 days, as the case may be.

2C(2). Breakage Cost Indemnity.

(i) The Company agrees to indemnify each holder of Floating Rate Notes for,
and to pay promptly to such holder upon written request, any amounts required to compensate
such holder for any losses, costs or expenses sustained or incurred by such holder
(including, without limitation, any loss (including loss of anticipated profits), cost or
expense sustained or incurred by reason of the liquidation or reemployment of deposits or
other funds acquired to fund or maintain any LIBOR Loan) as a consequence of (a) any event
(including any prepayment of Floating Rate Notes pursuant to paragraph 4A, 4B or 4D, or any
acceleration of Floating Rate Notes in accordance with paragraph 7A) which results in (I)
such holder receiving any amount on account of the principal of any LIBOR Loan prior to the
end of the Interest Period in effect therefor or (II) the conversion of the Interest Period,
other than on the first day of the Interest Period in effect therefor, or (b) any default in
the making of any payment or prepayment required to be made in respect of the Floating Rate
Notes (such amount being the “Breakage Cost Obligation”).

(ii) A certificate of any holder of Floating Rate Notes setting forth any
amount or amounts which such holder is entitled to receive pursuant to this paragraph 2C(2),
together with calculations in reasonable detail reflecting the basis for such amount or
amounts, shall be delivered to the Company and shall be conclusive absent manifest error.
The Company agrees to pay such holder the amount shown as due on any such certificate within
ten days after its receipt of the same.

 

4

 

(iii) The provisions of this paragraph 2C(2) shall remain operative and in
full force and effect regardless of the expiration of the term of this Agreement, the
consummation of the transactions contemplated hereby, the repayment of any of the Loans, the
invalidity or unenforceability of any term or provision of this Agreement or any Floating
Rate Note, or any investigation made by or on behalf of any holder of Floating Rate Notes.

2C(3). Reserve Requirements; Change in Circumstances.

(i) Notwithstanding any other provision of this Agreement, if after the date
of this Agreement any change in applicable law or regulation or in the interpretation or
administration thereof by any governmental authority (or the NAIC) charged with the
interpretation or administration thereof (whether or not having the force of law) shall
impose, modify or deem applicable any reserve, special deposit or similar requirement
against assets of, deposits with or for the account of, or credit extended by any holder of
Floating Rate Notes or shall impose on such holder or the London interbank market any other
condition affecting this Agreement or LIBOR Loans made by such holder and the result of any
of the foregoing shall be to increase the cost to such holder of making or maintaining any
LIBOR Loan or to reduce the amount of any payment received or receivable by such holder
hereunder or under any of the Floating Rate Notes (whether of principal, interest or
otherwise), then the Company will pay to such holder upon demand such additional amount or
amounts as will compensate such holder for such additional costs incurred or reduction
suffered.

(ii) If any holder of a Floating Rate Note shall have determined that the
adoption after the date hereof of any law, rule, regulation, agreement or guideline
regarding capital adequacy, or any change after the date hereof in any such law, rule,
regulation, agreement or guideline (whether such law, rule, regulation, agreement or
guideline has been adopted before or after the date hereof) or in the interpretation or
administration thereof by any governmental authority charged with the interpretation or
administration thereof, or compliance by such holder with any request or directive regarding
capital adequacy (whether or not having the force of law) of any governmental authority (or
the NAIC) has or would have the effect of reducing the rate of return on such holder’s
capital as a consequence of Loans made pursuant hereto to a level below that which such
holder could have achieved but for such applicability, adoption, change or compliance
(taking into consideration such holder’s policies with respect to capital adequacy) by an
amount deemed by such holder to be material, then from time to time the Company agrees to
pay to such holder such additional amount or amounts as will compensate such holder for any
such reduction suffered.

(iii) A certificate of any holder of Floating Rate Notes setting forth the
amount or amounts necessary to compensate such holder as specified in clause (i) or (ii)
above shall be delivered to the Company and shall be conclusive absent manifest error. The
Company agrees to pay such holder the amount shown as due on any such certificate within ten
days after its receipt of the same.

 

5

 

(iv) Failure or delay on the part of any holder of Floating Rate Notes to
demand compensation for any increased costs or reduction in amounts received or receivable
or reduction in return on capital shall not constitute a waiver of such holder’s right to
demand such compensation with respect to such period or any other period. The protection of
this paragraph shall be available to any such holder regardless of any possible contention
of the invalidity or inapplicability of the law, rule, regulation, agreement, guideline or
other change or condition that shall have occurred or been imposed.

(v) The provisions of this paragraph 2C(3) shall remain operative and in full
force and effect regardless of the expiration of the term of this Agreement, the
consummation of the transactions contemplated hereby, the repayment of any of the Loans, the
invalidity or unenforceability of any term or provision of this Agreement or any Floating
Rate Note, or any investigation made by or on behalf of any holder of Floating Rate Notes.

2C(4). Illegality.

(i) Notwithstanding any other provision of this Agreement, if, after the date
hereof, any change in any law or regulation or in the interpretation thereof by any
governmental authority (or the NAIC) charged with the administration or interpretation
thereof shall make it unlawful for any holder of Floating Rate Notes to make or maintain any
LIBOR Loan or to give effect to its obligations as contemplated hereby with respect to any
LIBOR Loan, then (a) such holder shall promptly notify the Company in writing of such
circumstances (which notice shall be withdrawn when such holder determines that such
circumstances no longer exist), (b) the obligation of such holder to make LIBOR Loans, to
continue LIBOR Loans as LIBOR Loans and to convert Prime Loans to LIBOR Loans shall
forthwith be canceled and, until such time as it shall no longer be unlawful for such holder
to make or maintain LIBOR Loans, such holder shall be obligated only to make Prime Loans and
(c) such holder may require that all LIBOR Loans made by it be converted to Prime Loans, in
which event all such LIBOR Loans shall be automatically converted to Prime Loans as of the
effective date of such notice as provided in clause (ii) below.

(ii) For purposes of this paragraph 2C(4), a notice to the Company by any
holder of Floating Rate Notes shall be effective as to LIBOR Loans made by such holder, if
lawful, on the last day of the Interest Period or Interest Periods currently applicable to
such LIBOR Loans; in all other cases such notice shall be effective on the date of receipt
by the Company. If any such conversion of a LIBOR Loan occurs on a day which is not the
last day of the then current Interest Period with respect thereto, the Company shall pay to
such holder such amounts, if any, as may be required pursuant to paragraph 2C(2).

 

6

 

2C(5). Inability to Determine Interest Rate. If prior to the first day of any
Interest Period, any holder of Floating Rate Notes shall have determined (which determination shall
be conclusive and binding upon the Company) that, by reason of circumstances affecting the London
interbank market, adequate and reasonable means do not exist for ascertaining the LIBO Rate for such Interest Period, such holder shall give notice thereof to the Company as
soon as practicable thereafter. If such notice is given, (i) any LIBOR Loans requested to be made
on the first day of such Interest Period shall be made as Prime Loans, (ii) any Loans that were to
have been converted on the first day of such Interest Period to or continued as LIBOR Loans shall
be converted to or continued as Prime Loans and (iii) any outstanding LIBOR Loans shall be
converted, at the end of the then applicable Interest Period, to Prime Loans. Until such notice
has been withdrawn by such holder, no further LIBOR Loans shall be made or continued as such, nor
shall the Company have the right to convert Prime Loans to LIBOR Loans.

3. CONDITIONS OF CLOSING. The obligation of any Purchaser to purchase and pay for any Notes
is subject to the satisfaction, on or before the Closing Day for such Notes, of the following
conditions:

3A. Certain Documents. Such Purchaser shall have received the following, each dated the date
of the applicable Closing Day:

(i) The Note(s) to be purchased by such Purchaser.

(ii) Certified copies of the resolutions of the Board of Directors of the
Company authorizing the execution and delivery of this Agreement and the issuance of the
Notes, and of all documents evidencing other necessary corporate action and governmental
approvals, if any, with respect to this Agreement, the Notes and the other Note Documents
(provided that for any Closing Day occurring after the Series A Closing, the Company
may certify that there has been no change to any applicable authorization or approval since
the date on which it was most recently delivered to such Purchaser under this clause (ii) as
an alternative to the further delivery thereof).

(iii) A certificate of the Secretary or an Assistant Secretary and one other
officer of the Company certifying the names and true signatures of the officers of the
Company authorized to sign this Agreement and the Notes and the other documents to be
delivered hereunder by the Company (provided that for any Closing Day occurring
after the Series A Closing, the Secretary or an Assistant Secretary and one other officer of
the Company may certify that there has been no change to the officers of the Company
authorized to sign Additional Notes and other documents to be delivered therewith since the
date on which a certificate setting forth the names and true signatures of such officers, as
described above, was most recently delivered to such Purchaser under this clause (iii), as
an alternative to the further delivery thereof).

(iv) Certified copies of the certificate of incorporation and bylaws of the
Company (provided that for any Closing Day occurring after the Series A Closing, the
Company may certify that there has been no change to any applicable constitutive document
since the date on which it was most recently delivered to such Purchaser under this clause
(iv), as an alternative to the further delivery thereof).

 

7

 

(v) Certified copies of the resolutions of the Board of Directors (or
equivalent governing body) of each Subsidiary authorizing the execution and delivery of the
Note
Documents to which such Subsidiary is a party, and of all documents evidencing other
necessary corporate action and governmental approvals, if any, with respect to such Note
Documents (provided that for any Closing Day occurring after the Series A Closing,
such Subsidiary may certify that there has been no change to any applicable authorization or
approval since the date on which it was most recently delivered to such Purchaser under this
clause (v) as an alternative to the further delivery thereof).

(vi) A certificate of the Secretary or an Assistant Secretary and one other
officer of each Subsidiary certifying the names and true signatures of the officers of such
Subsidiary, or its sole shareholder, as the case may be, authorized to sign the Note
Documents to which such Subsidiary is a party and the other documents to be delivered
hereunder by such Subsidiary (provided that for any Closing Day occurring after the
Series A Closing, the Secretary or an Assistant Secretary and one other officer of such
Subsidiary or its sole shareholder, as the case may be, may certify that there has been no
change to the officers of such Subsidiary or its sole shareholder, as the case may be,
authorized to sign documents to be delivered on such Closing Day since the date on which a
certificate setting forth the names and true signatures of such officers, as described
above, was most recently delivered to such Purchaser under this clause (vi), as an
alternative to the further delivery thereof).

(vii) Certified copies of the certificate of incorporation and bylaws (or
equivalent constitutive documents) of each Subsidiary (provided that for any Closing
Day occurring after the Series A Closing, such Subsidiary may certify that there has been no
change to any applicable constitutive document since the date on which it was most recently
delivered to such Purchaser under this clause (vii), as an alternative to the further
delivery thereof).

(viii) A favorable opinion of Crowe & Dunlevy to the effects set forth in
Exhibit B attached hereto, satisfactory to such Purchaser and as to such other
matters as such Purchaser may reasonably request. The Company hereby directs such counsel to
deliver such opinion, agrees that the issuance and sale of any Additional Notes will
constitute a reconfirmation of such direction, and understands and agrees that each
Purchaser receiving such an opinion will and is hereby authorized to rely on such opinion.

(ix) A good standing certificate for each of the Company and each of its
Subsidiaries from the Secretary of State (or equivalent governmental official) of the State
of its organization dated of a recent date and such other evidence of its status as such
Purchaser may reasonably request.

(x) Solely with respect to the Series A Closing, certified copies of Requests
for Information or Copies (Form UCC-11) or equivalent reports listing all effective
financing statements which name the Company or any of its Subsidiaries (under its present
name and previous names) as debtor and which are filed in the state of its organization,
together with copies of such financing statements.

 

8

 

(xi) Solely with respect to the Series A Closing, the Guaranty Agreement, duly
executed by each of the Guarantors signatory thereto.

(xii) Solely with respect to the Series A Closing, the Pledge Agreement, duly
executed by each of the Pledgors signatory thereto.

(xiii) Solely with respect to the Series A Closing, all certificates, if any,
representing the Equity Interests pledged under the Pledge Agreement, together with an
undated assignment instrument for each such certificate, duly executed in blank by the
holder thereof.

(xiv) Solely with respect to the Series A Closing, an executed counterpart of
an amendment to the Bank Agreement providing an increase to the Maximum Subordinated Amount
(as defined in the Bank Agreement) in order to permit the transactions contemplated by the
Note Documents.

(xv) Except to the extent previously executed and delivered in connection with
the issuance of another Series of Notes or in order to comply with the requirements of
paragraph 5L, Mortgages with respect to each of the U.S. Oil and Gas Properties that is
subject to a Lien in favor of the Bank Agent, duly executed by all parties thereto.

(xvi) Evidence satisfactory to such Purchaser as to the status of the
Company’s or the applicable Subsidiary’s title to such of the Oil and Gas Properties
described in clause (xv), or in any Mortgage executed and delivered by the Company or any of
its Subsidiaries after the Series A Closing Day, as such Purchaser may reasonably request.

(xvii) Such environmental reports as such Purchaser may request, in each case
satisfactory in form, scope and substance to such Purchaser.

(xviii) Solely with respect to the Series A Closing, the Security Agreement,
duly executed by the parties thereto.

(xix) Solely with respect to the Series A Closing, the Deposit Account Control
Agreements, duly executed by all parties thereto.

(xx) Solely with respect to the Series A Closing, Direction Letters executed
in blank by the Company, in such quantity as the Collateral Agent may reasonably request.

(xxi) Solely with respect to the Series A Closing, Letters-in-Lieu executed in
blank by the Company, in such quantity as the Collateral Agent may reasonably request.

(xxii) Solely with respect to the Series A Closing, the Intercreditor
Agreement, duly executed by all parties thereto.

(xxiii) Solely with respect to the Series A Closing, the Collateral Agency
Agreement, duly executed by all parties thereto.

 

9

 

(xxiv) Solely with respect to the Series A Closing, appropriate UCC-1
Financing Statements, naming the Collateral Agent as secured party and covering the
collateral under the Security Documents, for filing with the appropriate authorities.

(xxv) Solely with respect to the Series A Closing, certificate(s) of insurance
naming the Collateral Agent as an additional insured and evidencing insurance that meets the
requirements of this Agreement and the Security Documents and that is in amount, form and
substance, and from an issuer, satisfactory to such Purchaser.

(xxvi) Solely with respect to the Series A Closing, a certified copy of the
Bank Agreement, in form, scope and substance satisfactory to such Purchaser.

(xxvii) Solely with respect to the Series A Closing, a certified copy of the
Engineering Report prepared and signed by MHA Petroleum Consultants, Inc. and Sproule
Associates Inc. and with an effective date as of December 31, 2006 (the “Initial Engineering
Report”), which report shall include all information required to be included in Engineering
Reports delivered pursuant to clause (v) of paragraph 5A and shall otherwise be satisfactory
in form, scope and substance to such Purchaser, and which report shall be accompanied by a
determination of Adjusted PV10, certified by a Responsible Officer of the Company.

(xxviii) Solely with respect to the Series A Closing, written funding
instructions of the Company in the form of Exhibit C attached hereto.

(xxix) Solely with respect to the Series A Closing, (a) the Indebtedness
evidenced by the Diamond Note shall have been cancelled and converted to equity and (b) the
Amended and Restated Security Agreement, dated as of June 7, 2006, made by Diamond in favor
of the Company shall have terminated and all UCC-1 financing statements and other filings
relating thereto shall have been released or, at the option of the Bank Agent, assigned by
the Company to the Bank Agent.

(xxx) Such additional legal opinions, documents and certificates with respect
to legal matters or corporate or other proceedings related to the transactions contemplated
hereby as may be reasonably requested by such Purchaser.

3B. Opinion of Purchasers’ Special Counsel. Solely with respect to the Series A Closing, each
Series A Purchaser shall have received from Baker Botts L.L.P., who is acting as special counsel
for the Series A Purchasers in connection with this transaction, a favorable opinion satisfactory
to such Series A Purchaser as to such matters incident to the matters herein contemplated as it may
reasonably request.

3C. Representations and Warranties; No Material Adverse Change; No Default. The
representations and warranties contained in paragraph 8 and in the other Note Documents shall be
true on and as of such Closing Day, except to the extent of changes caused by the transactions
herein contemplated; there shall have occurred since December 31, 2006 no event having, or which
could reasonably be expected to have, a Material Adverse Effect; there shall exist on such Closing
Day no Event of Default or Default; and the Company shall have
delivered to such Purchaser a certificate of an officer of the Company, dated such Closing
Day, to all such effects.

 

10

 

3D. Purchase Permitted by Applicable Laws. The purchase of and payment for the Notes to be
purchased by such Purchaser on the terms and conditions herein provided (including the use of the
proceeds of such Notes by the Company) shall not violate any applicable law or governmental
regulation (including, without limitation, Section 5 of the Securities Act or Regulation T, U or X
of the Board of Governors of the Federal Reserve System) and shall not subject such Purchaser to
any tax, penalty, liability or other onerous condition under or pursuant to any applicable law or
governmental regulation, and such Purchaser shall have received such certificates or other evidence
as it may request to establish compliance with this condition.

3E. Legal Matters. Counsel for such Purchaser, including any special counsel for the
Purchasers retained in connection with the purchase and sale of such Additional Notes, shall be
satisfied as to all legal matters relating to such purchase and sale, and such Purchaser shall have
received from such counsel favorable opinions as to such legal matters as it may request.

3F. Payment of Fees. The Company shall have paid to the Purchasers any fees due them pursuant
to or in connection with this Agreement, including any Structuring Fee payable to PIMI pursuant to
paragraph 2B. In addition, all other fees which are due and payable on or before any Closing Day
(including fees payable to (i) the Purchasers’ engineering consultants and other technical advisors
and (ii) the Collateral Agent and its counsel to the extent reflected in statements rendered to the
Company at least one Business Day prior to such Closing Day) shall have been paid, and without
limiting the provisions of paragraph 11B, special counsel to the Purchasers shall have received its
fees, charges and disbursements to the extent reflected in a statement of such special counsel
rendered to the Company at least one Business Day prior to such Closing Day.

3G. Proceedings. All corporate and other proceedings taken or to be taken in connection with
the transactions contemplated hereby and all documents incident thereto shall be satisfactory in
substance and form to such Purchaser, and such Purchaser shall have received all such counterpart
originals or certified or other copies of such documents as it may reasonably request.

3H. Private Placement Numbers. A private placement number issued by Standard & Poor’s CUSIP
Service Bureau (in cooperation with the Securities Valuation Office of the National Association of
Insurance Commissioners) shall have been obtained for the Series of Notes being issued on such
Closing Day.

3I. Certain Additional Conditions to Issuance of Additional Notes. The Obligations of the
Additional Purchasers to purchase any Additional Notes shall be subject to the following additional
conditions precedent, in addition to the conditions specified in the Supplement pursuant to which
such Additional Notes may be issued:

 

11

 

3I(1). Compliance Certificate. A duly authorized senior financial officer of the
Company shall execute and deliver to each Additional Purchaser and each holder of Notes an
Officer’s Certificate dated the date of issue of such Series of Additional Notes stating that such
officer has reviewed the provisions of this Agreement (including any Supplements hereto) and
setting forth the information and computations (in sufficient detail) required in order to
establish whether the Company and its Subsidiaries is in compliance with the requirements of
paragraph 6 on such date and after giving effect to the issuance of such Series of Additional
Notes.

3I(2). Execution and Delivery of Supplement. The Company and each such Additional
Purchaser shall execute and deliver a Supplement substantially in the form of Exhibit D
hereto.

3I(3). Representations of Additional Purchasers. Each Additional Purchaser shall
have confirmed in the Supplement that the representations set forth in paragraph 9 are true with
respect to such Additional Purchaser on and as of the date of issue of the Additional Notes.

4. PREPAYMENTS. The Notes shall be subject to prepayment with respect to any required
prepayments set forth in such Notes as provided in paragraph 4A and 4D and with respect to the
optional prepayments permitted by paragraph 4B. Any prepayment made by the Company pursuant to any
other provision of this paragraph 4 shall not reduce or otherwise affect its obligation to make any
required prepayment as specified in paragraph 4A.

4A. Required Prepayments in the Case of Certain Asset Dispositions. If the Company is
required to make any prepayment in respect of the Notes pursuant to the provisions of paragraph 6G,
the Company shall apply to the prepayment of the Notes 100% of the Net 1Cash Proceeds of the
applicable sale, transfer or other disposition, together with interest thereon to the date of
prepayment and the Yield-Maintenance Amount or Breakage Cost Obligations, if any, in respect to
each Note. Any partial prepayment of the Notes pursuant to this paragraph shall be applied in
satisfaction of required payments of principal thereof in inverse order of their respective
scheduled due dates.

4B. Optional Prepayments.

4B(1). Optional Prepayment of Fixed Rate Notes with Yield-Maintenance Amount. The
Notes of all Series of Fixed Rate Notes shall be subject to prepayment on any Business Day, in
whole at any time or from time to time in part (in integral multiples of $100,000 and in a minimum
amount of $1,000,000), at the option of the Company, at 100% of the principal amount so prepaid
plus interest thereon to the prepayment date and the Yield-Maintenance Amount, if any, with respect
to each such Note. Any partial prepayment of Fixed Rate Notes pursuant to this paragraph 4B(1)
shall be applied, in accordance with paragraph 4E, in satisfaction of required payments of
principal of the Fixed Rate Notes of all Series of Fixed Rate Notes in inverse order of their
respective scheduled due dates.

 

12

 

4B(2). Optional Prepayment of Floating Rate Notes. The Notes of all Series of
Floating Rate Notes shall be subject to prepayment on any Business Day occurring at least 12 months
after the respective dates of issue for such Series, in whole at any time or from time to
time in part (in integral multiples of $100,000 and in a minimum amount of $1,000,000), at the
option of the Company, at (i) 101% of the principal amount so prepaid, if such prepayment occurs on
or prior to the second anniversary of the date of issue, and (ii) 100% of the principal amount so
prepaid, if such prepayment occurs after the second anniversary of the date of issue, in each case
plus interest thereon to the prepayment date; provided that if any Floating Rate Notes are
prepaid pursuant to this paragraph 4B(2) on any day other than the last day of the applicable
Interest Period, then such prepayment will be subject to paragraph 2C(2) and any Breakage Cost
Obligation payable thereunder. Any partial prepayment of Floating Rate Notes pursuant to this
paragraph 4B(2) shall be applied, in accordance with paragraph 4E, in satisfaction of required
payments of principal of the Floating Rate Notes of all Series in inverse order of their respective
scheduled due dates.

4C. Notice of Optional Prepayment. The Company shall give the holder of each Note to be
prepaid pursuant to paragraph 4B irrevocable written notice of such prepayment not less than 10
Business Days prior to the prepayment date, specifying such prepayment date, specifying the
aggregate principal amount of the Notes to be prepaid on such date, identifying each Note held by
such holder, and the principal amount of each such Note, to be prepaid on such date and stating
that such prepayment is to be made pursuant to paragraph 4B. Notice of prepayment having been
given as aforesaid, the principal amount of the Notes specified in such notice, together with
interest thereon to the prepayment date and together with the Yield-Maintenance Amount and Breakage
Cost Obligation, if any, herein provided, shall become due and payable on such prepayment date.
The Company shall, on or before the day on which it gives written notice of any prepayment pursuant
to paragraph 4B, give telephonic notice of the principal amount of the Notes to be prepaid and the
prepayment date to each holder which shall have designated a recipient for such notices in the
Purchaser Schedule attached hereto, on Schedule A attached to any Supplement or by notice
in writing to the Company.

4D. Offer to Prepay Notes in the Event of a Change in Control or a Change in Management.

(i) Notice of Change in Control, Control Event or Change in Management. The
Company will, within five days after any Responsible Officer has knowledge of the occurrence
of any Change in Control, Control Event or Change in Management, give written notice of such
Change in Control, Control Event or Change in Management to each holder of Notes unless
notice in respect of such Change in Control (or the Change in Control contemplated by such
Control Event) or Change in Management shall have been given pursuant to clause (ii) of this
paragraph 4D. If a Change in Control has occurred and the successor is not a Qualifying
Public Company, or if a Change in Management has occurred, such notice shall contain and
constitute an offer to prepay the Notes as described in clause (iii) of this paragraph 4D
and shall be accompanied by the certificate described in clause (vi) of this paragraph 4D.
The Company shall, on or before the day on which it gives such written notice of such Change
in Control or Change in Management, give telephonic notice thereof to each holder which
shall have designated a recipient of such notices in the Purchaser Schedule attached
hereto, on Schedule A attached to any Supplement or by notice in writing to the Company.

 

13

 

(ii) Condition to Company Action. The Company will not take any action that
consummates or finalizes a Change in Control or Change in Management unless at least 15 days
prior to such action it shall have given to each holder of Notes written notice of such
impending Change in Control or Change in Management. The Company shall, on or before the
day on which it gives such written notice of such impending Change in Control or Change in
Management, give telephonic notice thereof to each holder which shall have designated a
recipient of such notices in the Purchaser Schedule attached hereto, on Schedule A
attached to any Supplement or by notice in writing to the Company.

(iii) Offer to Prepay Notes. The offer to prepay Notes contemplated by the
foregoing clause (i) shall be an offer to prepay, in accordance with and subject to this
paragraph 4D, all, but not less than all, the Notes held by each holder (in this case only,
“holder” in respect of any Note registered in the name of a nominee for a disclosed
beneficial owner shall mean such beneficial owner) on a date specified in such offer (the
“Proposed Prepayment Date”). Such Proposed Prepayment Date shall be not less than 10 days
and not more than 30 days after the date of such offer (if the Proposed Prepayment Date
shall not be specified in such offer, the Proposed Prepayment Date shall be the 20th day
after the date of such offer).

(iv) Acceptance. The Company shall, on or before the seventh day prior to the
Proposed Prepayment Date, give telephonic renotification and confirmation thereof to each
holder which shall have designated a recipient of such notices in the Purchaser
Schedule attached hereto or by notice in writing to the Company. A holder of Notes may
accept the offer to prepay made pursuant to this paragraph 4D by causing a notice of such
acceptance to be delivered to the Company on or before the fifth day prior to the Proposed
Prepayment Date. A failure by a holder of Notes to respond to an offer to prepay made
pursuant to this paragraph 4D on or before such date shall be deemed to constitute an
acceptance of such offer by such holder.

(v) Prepayment. Prepayment of the Notes to be prepaid pursuant to this
paragraph 4D shall be at 100% of the principal amount of such Notes, together with interest
accrued to the date of prepayment and the Yield-Maintenance Amount or Breakage Cost
Obligations, if any, with respect to each such Notes. The prepayment shall be made on the
Proposed Prepayment Date.

(vi) Officer’s Certificate. Each offer to prepay the Notes pursuant to this
paragraph 4D shall be accompanied by a certificate, executed by a Responsible Officer of the
Company and dated the date of such offer, specifying: (a) the Proposed Prepayment Date; (b)
that such offer is made pursuant to this paragraph 4D; (c) the principal amount of each Note
offered to be prepaid; (d) the interest that would be due on each Note offered to be
prepaid, accrued to the Proposed Prepayment Date; (e) that the conditions of this paragraph
4D have been fulfilled; and (f) in reasonable detail, the nature and date of the Change in
Control or Change in Management.

 

14

 

4E. Application of Prepayments.

(i) Upon any partial prepayment of the Notes pursuant to paragraph 4A or 4B,
the amount so prepaid shall be allocated to all outstanding Notes of all Series (including,
for the purpose of this paragraph 4E only, all Notes prepaid or otherwise retired or
purchased or otherwise acquired by the Company or any of its Subsidiaries or Affiliates
other than by prepayment pursuant to paragraph 4A, 4B or 4D) in proportion to the respective
outstanding principal amounts thereof (and, in the case of prepayments of any Series of
Floating Rate Notes, allocated to Loans outstanding under such Floating Rate Notes as the
Company shall direct in writing).

(ii) Upon any prepayment of Notes of any Series pursuant to paragraph 4D, the
amount so prepaid shall be allocated to all Notes of all Series (including, for the purpose
of this paragraph 4E only, all Notes prepaid or otherwise retired or purchased or otherwise
acquired by the Company or any of its Subsidiaries or Affiliates other than by prepayment
pursuant to paragraph 4A, 4B or 4D) at the time outstanding and held by holders of such
Notes who have accepted the Company’s offer of prepayment made pursuant to paragraph 4D in
proportion to the respective outstanding principal amounts thereof (and, in the case of
prepayments of any Series of Floating Rate Notes, allocated to Loans outstanding under such
Floating Rate Notes as the Company shall direct in writing).

4F. Retirement of Notes. The Company shall not, and shall not permit any of its Subsidiaries
or Affiliates to, prepay or otherwise retire in whole or in part prior to their stated installment
or final maturities (other than by prepayment pursuant to paragraphs 4A, 4B or 4D or upon
acceleration of such final maturity pursuant to paragraph 7A), or purchase or otherwise acquire,
directly or indirectly, Notes held by any holder.

5. AFFIRMATIVE COVENANTS. So long thereafter as any Note is outstanding and unpaid, the
Company covenants as follows:.

5A. Financial Statements; Notice of Defaults. The Company will deliver to each holder of any
Notes:

(i) as soon as practicable and in any event within 60 days after the end of
each quarterly period (other than the last quarterly period) in each fiscal year (or, if
earlier, such date as the Company is required to file a Quarterly Report on Form 10-Q with
the SEC), consolidated statements of income, cash flows and shareholders’ equity of the
Company and its Subsidiaries for the period from the beginning of the current fiscal year to
the end of such quarterly period, and a consolidated balance sheet of the Company and its
Subsidiaries as at the end of such quarterly period, setting forth in each case in
comparative form figures for the corresponding period in the preceding fiscal year, all in
reasonable detail and certified by an authorized financial officer of the Company, subject
to changes resulting from year-end adjustments;

 

15

 

(ii) as soon as practicable and in any event within 120 days after the end of
each fiscal year (or, if earlier, such date as the Company is required to file an Annual
Report on Form 10-K with the SEC), consolidated statements of income, cash flows and
shareholders’ equity of the Company and its Subsidiaries for such year, and a consolidated
balance sheet of the Company and its Subsidiaries as at the end of such year, setting forth
in each case in comparative form corresponding consolidated figures from the preceding
annual audit, all in reasonable detail and satisfactory in form to the Required Holder(s)
and reported on by Smith, Carney & Co., p.c., or by independent public accountants of
recognized national standing selected by the Company whose report shall be without
limitation as to scope of the audit and satisfactory in substance to the Required Holder(s);

(iii) promptly upon transmission thereof, copies of all such financial
statements, proxy statements, notices and reports as it shall send to its public equity
holders and copies of all registration statements (without exhibits) and all reports which
it files with the SEC, provided, that such information need not be provided by the
Company if it is available on the SEC’s EDGAR system and the Company sends to such holder an
email notification at the time such information becomes available on such system;

(iv) promptly upon receipt thereof, a copy of each other report submitted to
the Company or any Subsidiary by independent accountants in connection with any annual,
interim or special audit made by them of the books of the Company or any Subsidiary;

(v) (a) prior to April 1 of each year, an Engineering Report which shall be
dated as of a date on or after the immediately preceding December 31, (b) prior to October 1
of each year, an Engineering Report which shall be dated as of a date on or after the
immediately preceding August 1, (c) at such other times as the Required Holder(s) may
request, an Engineering Report which shall be dated as promptly after such request as
practicable (and in any event within 30 days after any such request), and (d) up to two
other times during any 12-month period at the Company’s election, an Engineering Report
which shall be dated within 45 days before the date of delivery thereof to such holder, each
such Engineering Report described in this clause (v) setting forth the Company’s and its
Subsidiaries’ reserve information in the same form, substance and detail as that provided in
the Initial Engineering Report, including, but not limited to, the oil and gas reserves
attributable to the U.S. Oil and Gas Properties of the Company and its Subsidiaries,
together with a projection of the rate of production and taxes, operating expenses and
capital expenditures with respect thereto as of the date thereof, based on prices determined
as provided in the definition of “Engineering Report”, and accompanied by a determination of
Adjusted PV10 as of the date thereof, certified by a Responsible Officer;

 

16

 

(vi) as soon as practicable and in any event within five days after any
Responsible Officer of the Company obtaining knowledge (a) of any condition or event which,
in the opinion of management of the Company, would reasonably be expected to have a Material
Adverse Effect, (b) that any Person has given any notice from any Person to the Company or
any of its Subsidiaries or taken any other action with respect to a claimed default or event or condition of the type referred to in clause (ii) of
paragraph 7A, (c) of the institution of any litigation involving claims against the Company
or any of its Subsidiaries (other than claims as to which the Company’s insurance carrier
has confirmed coverage) equal to or greater than $1,000,000 with respect to any single cause
of action or of any adverse determination in any court proceeding in any litigation
involving a potential liability to the Company or any of its Subsidiaries equal to or
greater than $1,000,000 with respect to any single cause of action which makes the
likelihood of an adverse determination in such litigation against the Company or such
Subsidiary substantially more probable or (d) of any regulatory proceeding which would
reasonably be expected to have a Material Adverse Effect, an Officer’s Certificate
specifying the nature and period of existence of any such condition or event, or specifying
the notice given or action taken by such Person and the nature of any such claimed default,
event or condition, or specifying the details of such proceeding, litigation or dispute and
what action the Company or any of its Subsidiaries has taken, is taking or proposes to take
with respect thereto;

(vii) promptly after the filing or receiving thereof, copies of all reports
and notices which the Company files under ERISA with the Internal Revenue Service or the
PBGC or the U.S. Department of Labor or which the Company receives from such corporation;

(viii) promptly and in any event within 10 days after it knows or has reason
to know of the occurrence of any event of the type specified in clause (xiii) of paragraph
7A notice of such event and the likely impact on the Company and its Subsidiaries;

(ix) promptly (a) following the execution and delivery thereof, copies of all
amendments, restatements, supplements or other modifications of the Bank Agreement and (b)
following the delivery thereof under the Bank Agreement, copies of all borrowing base
notices and similar reports and communications received from, or sent by the Company or any
of its Subsidiaries to, the Bank Agent or any Bank,

(x) so long and at such times as the Company is required to furnish the same
or substantially similar materials under the Bank Agreement, a drilling schedule for all
U.S. Oil and Gas Properties owned, controlled, or participated in by the Company or any
Subsidiary,

(xi) so long and at such times as the Company is required to furnish the same
or substantially similar materials under the Bank Agreement, copies of all presentation
materials or board books provided to the Board of Directors, in each case that are related
to the financial condition of the Company or any Indebtedness of the Company (other than any
materials or information governed by a legal claim of privilege or a confidentiality
agreement prohibiting the sharing of such information with the holders of Notes),

 

17

 

(xii) so long as the Company is required under the Bank Agreement to furnish
or cause to be furnished production and price tracking monthly reports pertaining to the
U.S. Oil and Gas Properties (the “Production and Price Tracking Reports”),
contemporaneously with the furnishing thereof to the Bank, a copy of such Production and
Price Tracking Report,

(xiii) so long as the Company is required under the Bank Agreement to furnish
or cause to be furnished copies of drill site title opinions or division order title
opinions covering newly drilled wells included in the Collateral which are not covered by
title opinions previously delivered to the Bank (the “Periodic Title Information”),
contemporaneously with the furnishing thereof to the Bank, a copy of such Periodic Title
Information, and

(xiv) with reasonable promptness, such other information respecting the
condition or operations, financial or otherwise, of the Company or any of its Subsidiaries
as such holder may reasonably request.

Together with each delivery of financial statements required by clauses (i) and (ii) above, the
Company will deliver to each holder of any Notes an Officer’s Certificate in substantially the form
of Exhibit M attached hereto (1) demonstrating (with computations in reasonable detail)
compliance by the Company and its Subsidiaries with the provisions of paragraphs 5L, 5M, 6A(1),
6A(2), 6A(3), 6A(4), 6E and 6G and stating that there exists no Event of Default or Default, or, if
any Event of Default or Default exists, specifying the nature and period of existence thereof and
what action the Company proposes to take with respect thereto and (2) certifying an attached true
and complete list, as of the last day of the applicable fiscal quarter or fiscal year, of all Swaps
of the Company and its Subsidiaries, the material terms thereof (including the type, term,
effective date, termination date and notional amounts or volumes), the net mark-to-market value
thereof, any new credit support agreements relating thereto not previously delivered to the
holders, any margin required or supplied under any credit support document, and the counterparty to
each such Swap. Together with each delivery of financial statements required by clause (ii) above,
the Company will deliver to each holder of any Notes a certificate of such accountants stating
that, in making the audit necessary for their report on such financial statements, they have
obtained no knowledge of any Event of Default or Default, or, if they have obtained knowledge of
any Event of Default or Default, specifying the nature and period of existence thereof. Such
accountants, however, shall not be liable to anyone by reason of their failure to obtain knowledge
of any Event of Default or Default which would not be disclosed in the course of an audit conducted
in accordance with generally accepted auditing standards.

The Company also covenants that promptly, and in any event within five (5) Business Days,
after any Responsible Officer obtains knowledge of an Event of Default or Default, it will deliver
to each holder of any Notes an Officer’s Certificate specifying the nature and period of existence
thereof and what action the Company proposes to take with respect thereto.

 

18

 

5B. Information Required by Rule 144A. The Company will, upon the request of the holder of
any Note, provide such holder, and any qualified institutional buyer designated by such holder,
such financial and other information as such holder may reasonably
determine to be necessary in order to permit compliance with the information requirements of
Rule 144A under the Securities Act in connection with the resale of Notes, except at such times as
the Company is subject to and in compliance with the reporting requirements of section 13 or 15(d)
of the Exchange Act. For the purpose of this paragraph 5B, the term “qualified institutional
buyer” shall have the meaning specified in Rule 144A under the Securities Act.

5C. Inspection of Property. The Company will permit any Person designated by any holder in
writing, at such holder’s expense if no Default or Event of Default exists and at the Company’s
expense if a Default or Event of Default does exist, to visit and inspect any of the properties of
the Company and its Subsidiaries, to examine the corporate books and financial records of the
Company and its Subsidiaries and make copies thereof or extracts therefrom and to discuss the
affairs, finances and accounts of any of such Persons with the principal officers of the Company
and its independent public accountants, all at such reasonable times and as often as such holder
may reasonably request.

5D. Covenant to Secure and Guarantee Notes Equally. The Company will, if it or any Subsidiary
shall create or assume any Lien upon any of its Property, whether now owned or hereafter acquired,
other than Liens permitted by the provisions of paragraph 6C (unless prior written consent to the
creation or assumption thereof shall have been obtained pursuant to paragraph 11C), make or cause
to be made effective provision whereby the Notes will be secured by such Lien equally and ratably
with any and all other Indebtedness thereby secured so long as any such other Indebtedness shall be
so secured. If any Person (other than in the case of a Subsidiary, which circumstance is addressed
in clause (iv) of paragraph 5O) provides a Guarantee of any obligations under the Bank Agreement,
the Company will cause such Person to Guarantee the Notes on a basis subordinate to the Guarantee
of the obligations under the Bank Agreement, pursuant to a Guaranty Agreement substantially in the
form of Exhibit H attached hereto.

5E. Compliance with Laws. The Company will, and will cause each of its Subsidiaries to,
comply with all laws, ordinances or governmental rules or regulations to which each of them is
subject, including, without limitation, environmental laws, and will obtain and maintain in effect
all licenses, certificates, permits, franchises and other governmental authorizations necessary to
the ownership of their respective Properties or to the conduct of their respective businesses, in
each case to the extent necessary to ensure that non-compliance with such laws, ordinances or
governmental rules or regulations or failures to obtain or maintain in effect such licenses,
certificates, permits, franchises and other governmental authorizations would not reasonably be
expected, individually or in the aggregate, to have a Material Adverse Effect.

 

19

 

5F. Insurance. The Company will maintain with financially sound and reputable insurance
companies, insurance with respect to its business, operations and properties in at least such
amounts and against at least such risks as are usually insured against in the same general area by
companies of established reputation engaged in the same or a similar business. The Collateral
Agent and all holders of Notes shall be named as additional insureds on all liability insurance
policies, obtained or maintained by or on behalf of the Company and its Subsidiaries. Each policy
of insurance or endorsement shall contain a clause requiring the insurer to give not less than 30 days prior written notice to the Collateral Agent and the
holders of the Notes in the event of cancellation of the policy for any reason whatsoever and a
clause specifying that the interests of the Collateral Agent and the holders of the Notes shall not
be impaired or invalidated by any act or neglect of the Company or the applicable owner or operator
of the Oil and Gas Properties. If the Company fails to provide and pay for such insurance, the
Collateral Agent or any holder of any Notes may, at its option, but shall not be required to,
procure the same and charge the Company therefor. The Company agrees to deliver, or cause to be
delivered, to any holder of any Notes, upon request from such holder, true copies of all reports
made in any reporting forms to insurance companies.

5G. Maintenance of Existence. The Company will, and will cause each of its Subsidiaries to,
do or cause to be done all things necessary to preserve, renew and keep in full force and effect
its corporate existence and Material Rights; provided that nothing in this paragraph shall
prevent the abandonment or termination of the existence of any Subsidiary, or the rights or
franchises of any Subsidiary that is not a Guarantor or the Company if such abandonment or
termination would not reasonably be expected to have a Material Adverse Effect.

5H. Payment of Taxes. The Company will, and will cause each of its Subsidiaries to, pay and
discharge promptly all taxes, assessments and governmental charges or levies imposed upon it or
upon its income or profits or in respect of its Property, prior to the time penalties would attach
thereto, as well as lawful claims for labor, materials and supplies or otherwise which, if unpaid,
might become a Lien or charge upon such Properties or any part thereof; provided,
however, that neither the Company nor any Subsidiary shall be required to pay and discharge
or to cause to be paid and discharged any such tax, assessment, charge, levy or claim so long as
the validity or amount thereof shall be subject to an active challenge or contest initiated in good
faith for which adequate reserves have been established in accordance with GAAP.

5I. Operation and Maintenance of Property. The Company shall maintain, or cause the
applicable Subsidiary to:

(i) operate the Oil and Gas Properties and other material Properties, or (to
the extent the Company or applicable Subsidiary is able to do so in the case of properties
operated by third parties) cause such Oil and Gas Properties and other material Properties
to be operated, in a careful and efficient manner in accordance with the practices of the
industry and in compliance with all applicable contracts and agreements and in compliance
with all Governmental Requirements, including, without limitation, applicable pro ration
requirements and environmental laws, and all applicable laws, rules and regulations of every
other Governmental Authority from time to time constituted to regulate the development and
operation of the Oil and Gas Properties and the production and sale of Hydrocarbons and
other minerals therefrom, except, in each case, where the failure to comply would not
reasonably be expected to have a Material Adverse Effect;

(ii) keep and maintain all Property material to the conduct of its business in
good working order and condition (ordinary wear and tear excepted);

 

20

 

(iii) except where failure to take the following actions would not reasonably
be expected to have a Material Adverse Effect, promptly pay and discharge, or make
reasonable and customary efforts to cause to be paid and discharged, all delay rentals,
royalties, expenses and indebtedness accruing under the leases or other agreements affecting
or pertaining to its Oil and Gas Properties and do all other things necessary to keep
unimpaired their rights with respect thereto and prevent any forfeiture thereof or default
thereunder;

(iv) promptly perform or make reasonable and customary efforts to cause to be
performed, in accordance with industry standards, the obligations required by each and all
of the assignments, deeds, leases, subleases, contracts and agreements affecting its
interests in its Oil and Gas Properties and other material Properties; and

(v) to the extent the Company or the applicable Subsidiary is not the operator
of any Property, use reasonable efforts to cause such operator to ensure compliance with the
foregoing clauses (i) — (iv).

5J. Environmental Covenants. The Company will immediately notify each holder of any Notes of,
and provide such holder with copies of any notifications of, discharges or releases or threatened
releases or discharges of any Hazardous Material on, upon, into or from any Property owned or used
by the Company or any Subsidiary which are given or required to be given by or on behalf of the
Company or any Subsidiary to any Governmental Authority, if any of the foregoing would reasonably
be expected to have a Material Adverse Effect, and such copies of notifications shall be delivered
to the holders at the same time as they are delivered to such Governmental Authority. The Company
further agrees promptly to undertake and pursue diligently to completion, or to cause to be
undertaken and pursued diligently to completion, any appropriate and legally required or authorized
remedial containment and cleanup action in the event of any release or discharge or threatened
release or discharge of any Hazardous Material on, upon, into or from any such Property. To the
extent required by applicable law, at all times while owning and operating their respective
Properties, the Company will maintain and retain, or cause the applicable Subsidiary to maintain
and retain, complete and accurate records of all releases, discharges or other disposal of
Hazardous Materials on, onto, into or from any such Property, including, without limitation,
records of the quantity and type of any Hazardous Materials disposed of on or off such Property.

5K. Environmental Indemnities. The Company hereby agrees to indemnify, defend and hold
harmless the Collateral Agent and each holder of Notes and each of their respective officers,
directors, employees, agents, consultants, attorneys, contractors, partners, affiliates,
successors, assigns or transferees from and against, and reimburse said Persons in full with
respect to, any and all loss, liability, damage, fines, penalties, costs and expenses, of every
kind and character, including reasonable attorneys’ fees and court costs, known or unknown, fixed
or contingent, occasioned by or associated with any claims, demands, causes of action, suits and/or
enforcement actions, including any administrative or judicial proceedings, and any remedial,
removal or response actions ever asserted, threatened, instituted or requested by any Persons,
including any Governmental Authority, arising out of or related to (i) the breach of any
representation or warranty of the Company contained in paragraph 8M set forth herein, (ii) the

 

21

 

failure of the Company to perform, or to cause to be performed, any of the covenants contained
in paragraph 5J or (iii) the ownership, construction, occupancy, operation, use of any Property of
the Company or any Subsidiary prior to the date on which the Obligations have been paid in full and
the Security Documents have been released (all of the foregoing, collectively, the “Indemnified
Liabilities”). THE FOREGOING INDEMNITY OBLIGATIONS OF THE COMPANY SHALL EXTEND TO ALL INDEMNIFIED
LIABILITIES, INCLUDING, WITHOUT LIMITATION, ANY INDEMNIFIED LIABILITIES ARISING FROM OR ATTRIBUTED,
IN WHOLE OR IN PART, TO THE NEGLIGENCE OF ANY INDEMNIFIED PARTY. The obligations of the Company
under this paragraph 5K shall survive the transfer of any Note or portion thereof or interest
therein by any holder thereof or any Transferee, the payment of any Note and the termination of
this Agreement or any of the other Note Documents.

5L. Additional Oil and Gas Properties. If at any time, the value of the U.S. Oil and Gas
Properties subject to the Liens in favor of the Collateral Agent under the Security Documents at
such time represents less than 95% of the value of all Oil and Gas Properties at such time as
reflected in the most recent Engineering Report delivered by the Company pursuant to clause (xxvii)
of paragraph 3A or clause (v) of paragraph 5A, as applicable, the Company shall grant or cause to
be granted to the Collateral Agent as security for the Obligations first-priority Liens (subject
only to the prior Lien thereon in favor of the Bank Agent) on such of its U.S. Oil and Gas
Properties that upon the grant of such additional Liens, the value of the Oil and Gas Properties
subject to the Liens existing under the terms of the Security Documents represent at least 95% of
the value of all Oil and Gas Properties as reflected in the most recent Engineering Report
delivered by the Company pursuant to clause (xxvii) of paragraph 3A or clause (v) of paragraph 5A,
as applicable. All Liens required to be granted to the Collateral Agent pursuant to the preceding
sentence will be created and perfected by and in accordance with the provisions of such agreements,
instruments and documents as shall be in form, scope and substance satisfactory to the Collateral
Agent in its sole discretion and in sufficient executed (and acknowledged where necessary or
appropriate) counterparts for recording purposes. Concurrently with the granting of the Lien or
other action referred to in the preceding two sentences, the Company will provide to the Collateral
Agent (i) title information in form, scope and substance satisfactory to the Collateral Agent in
its sole discretion with respect to the Company’s or the applicable Subsidiary’s interests in such
Oil and Gas Properties and (ii) upon the request of the Collateral Agent or the Required Holders,
with the exception of deeds of trust encumbering Oil and Gas Properties in Texas, an opinion of
counsel addressed to the Collateral Agent and each holder of Notes in form, scope and substance
reasonably satisfactory to such Persons from counsel reasonably acceptable to such Persons, stating
that the applicable such agreements, instruments and documents are valid, binding and enforceable
in accordance with their respective terms and, where applicable, in legally sufficient form for
filing in the applicable jurisdictions.

5M. Hedging Arrangements. The Company will at all times maintain, or cause its applicable
Subsidiaries to maintain, Swaps the notional volumes for which are (i) greater than 25% of its
reasonably anticipated projected production over the following 12-month period from its PDP
Reserves and (ii) not more than the lesser of (a) 75% of its reasonably anticipated projected
production over the following 12-month period from its Proved Reserves or (b) 90% of its reasonably
anticipated projected production over the following 12-
month period from its Proved Developed Reserves, in each case with Approved Counterparties and
with remaining terms not exceeding 3 years.

 

22

 

5N. Lockbox Account. (i) The Company shall deposit all Cash Receipts received by it into an
account maintained with the Bank Agent and subject (on a second priority basis) to the Deposit
Account Control Agreement, or a substantially similar agreement otherwise satisfactory to the
Required Holder(s) in their sole discretion (the “Lockbox Account”), (ii) the Company shall direct
each payor of any Cash Receipts at such time to make payment to such Lockbox Account, and (iii)
after payment in full of all obligations owing under or in connection with the Bank Credit
Agreement, the Collateral Agent is authorized to complete and deliver the Direction Letters
previously delivered to the Collateral Agent to the current purchasers of the Company’s or any of
its Subsidiaries’ Hydrocarbons and the Letters-in-Lieu previously delivered to the Collateral Agent
to the payors of proceeds of production from the U.S. Oil and Gas Properties.

5O. Further Assurances.

(i) The Company agrees that at any time and from time to time, at its expense,
it will promptly execute and deliver all further instruments and documents (including,
without limitation, Direction Letters and Letters-in-Lieu in addition to those delivered on
the Series A Closing), and take all further action that may be reasonably necessary or
desirable, or that the Collateral Agent or the holders of Notes may reasonably request, in
order to perfect and protect any Lien or security interest granted or purported to be
granted by the Company under the Security Documents or to enable the Collateral Agent to
exercise and enforce rights and remedies thereunder.

(ii) It is the intent of the parties that all obligations of the Company and
its Subsidiaries under the Note Documents shall be guaranteed by each Subsidiary, whether
now existing or hereafter acquired or created, and shall be secured by substantially all the
property and assets of the Company and its Subsidiaries, whether now existing or hereafter
acquired, including, without limitation, Oil and Gas Properties, securities accounts, real
property, accounts, chattel paper, instruments, deposit accounts, investment property,
documents, contracts, letter-of-credit rights, general intangibles, equipment, inventory,
permits, patents, trademarks, copyrights, trade names, service marks, Equity Interests
issued by the Subsidiaries or other Persons and other properties acquired after the Series A
Closing Date and whether owned or acquired by the Company or any Subsidiary.

(iii) At its expense, the Company shall execute and deliver (and, where
applicable, authorize the filing of), and shall cause its Subsidiaries to execute and
deliver (and, where applicable, authorize the filing of), any and all financing statements,
continuation statements and amendments, mortgages, deeds of trust and other instruments,
agreements or other documents, and take all action (including, without limitation, filing
all Uniform Commercial Code financing statements, continuation statements and amendments,
filing or recording mortgages and deeds of trust and filing assignments or other documents
customarily filed with the U.S. Patent and Trademark Office or the U.S. Copyright Office) that may be required under applicable law, and
that the Required Holder(s) or the Collateral Agent may reasonably request, in order to
effectuate the transactions contemplated by the Note Documents and in order to grant,
preserve, protect and perfect the validity and priority of the security interests and Liens
created or purported to be created by the Security Documents or in order to effectuate the
intent of the parties set forth in clause (ii) of this paragraph 5O.

 

23

 

(iv) At its expense, the Company shall: (a) cause each subsequently acquired
or organized Subsidiary, contemporaneously with such acquisition or organization, to execute
and deliver (I) a supplement to Guaranty Agreement in the form attached as Annex A to the
Guaranty Agreement and (II) each Security Document that the Required Holder(s) or the
Collateral Agent may request in order to grant the Collateral Agent a valid, first priority
pledge or security interest in the assets and properties of such Subsidiary, including
without limitation, any outstanding Equity Interests of any other Subsidiary or other Person
which may be held by such Subsidiary; (b) cause any Subsidiary that has not previously
executed and delivered the Pledge Agreement or a supplement or joinder thereto and that
itself is the holder of Equity Interests of any other Subsidiary or other Person, to execute
and deliver such a supplement or joinder to the Pledge Agreement, pledging all of the Equity
Interests of any such other Subsidiary or other Person held by it; and (c) pursuant to the
Pledge Agreement, deliver or cause such Subsidiary to deliver to the Collateral Agent all
certificates, stock powers and other documents required by the Pledge Agreement with respect
to any Equity Interests owned or held by it or by such Subsidiary, or take or cause such
Subsidiary to take such other actions, all as may be reasonably requested by the Collateral
Agent to provide the Collateral Agent with a first priority perfected pledge of and security
interest in all outstanding Equity Interests owned or held by such Subsidiary.

(v) Any security interests and Liens granted by the Company and its
Subsidiaries pursuant to this paragraph 5O shall be created under the Security Documents and
other security agreements, pledge agreements, mortgages, deeds of trust, assignments and
other instruments, agreements and other documents in form, scope and substance reasonably
satisfactory to the Required Holder(s) and to the Collateral Agent, and at its expense the
Company will deliver or in the case of the Company cause to be delivered to the Collateral
Agent all such instruments, agreements and other documents, including, without limitation,
legal opinions, title opinions, title insurance policies, surveys, environmental site
assessments and lien searches, as the Required Holder(s) or the Collateral Agent shall
reasonably request to evidence or further compliance with this paragraph 5O.

6. NEGATIVE COVENANTS. So long thereafter as any Note or other amount due hereunder is
outstanding and unpaid, the Company covenants as follows:

6A. Financial Covenants.

6A(1). Adjusted PV10 to Total Debt. The Company will not permit, at any time, the
ratio of Adjusted PV10 to Total Debt to be less than 1.50 to 1.00.

 

24

 

6A(2). Total Debt to EBITDA Ratio. The Company will not permit, at any time, the
ratio of Total Debt to EBITDA for the four fiscal quarters most recently ended to be greater than
4.00 to 1.00.

6A(3). Interest Coverage. The Company will not permit, for any fiscal quarter,
commencing with the fiscal quarter ended June 30, 2007, the ratio of EBITDA to Consolidated
Interest Expense, in each case for the four fiscal quarters most recently ended, to be less than
2.50 to 1.00.

6A(4). Tangible Net Worth. The Company will not permit, at any time, Consolidated
Tangible Net Worth to be less than $135,961,144 plus the sum of (i) 50% of positive Net Income in
each fiscal quarter commencing with the fiscal quarter ended June 30, 2007 and (ii) 100% of the Net
Cash Proceeds from the issuance and sale of Equity Interests by the Company after March 31, 2007.
For purposes of this covenant, the non-cash effects, if any, of Swaps pursuant to Financial
Accounting Standards Board Rule No. 133 (Accounting for Derivative Instruments and Hedging
Activities) will not be included.

6B. Restricted Payments. The Company will not (i) pay or declare any dividend on any shares
of any class of its stock (other than stock dividends), (ii) make any other distributions or other
shareholder expenditure on account of any shares of any class of its stock, nor set aside any funds
for such purpose, nor (iii) otherwise make or agree to pay for or make (except as set forth in the
immediately succeeding paragraph), directly or indirectly, any other distribution with respect to
any shares of any class of its stock, or any payment (whether in cash, securities or other
property), including any sinking fund or similar deposit, on account of the purchase, redemption,
retirement, acquisition, cancellation or termination of any such shares or any option, warrants or
other right to acquire any such shares, except that if at the time thereof and immediately after
giving effect thereto, no Default or Event of Default shall have occurred and be continuing (or be
created), the Company may declare, and agree to declare and pay, dividends (interest expense) in
cash to the holders of Qualified Redeemable Preferred Stock, and the Company may make and pay such
dividends so declared within thirty (30) days after such declaration. For the avoidance of doubt,
shares of Qualified Redeemable Preferred Stock constitute stock of the Company for purposes of
clauses (i), (ii) and (iii) above, and the Company shall not elect (or agree to elect) any option
to redeem any Qualified Redeemable Preferred Stock without the prior written consent of the
Required Holders.

The Qualified Redeemable Preferred Stock issued by the Company may include (as provided in
clause (ii) of the definition thereof) a provision for the mandatory redemption of such stock
following a Change in Control or a Change in Management (as contemplated by paragraph 4D).
Moreover, the Company may make a mandatory redemption payment on Qualified Redeemable Preferred
Stock solely by reason of a Change in Control or a Change in Management (as contemplated by
paragraph 4D), and such mandatory redemption payment in itself is not an Event of Default (although
nothing set forth in this Agreement shall subordinate the Note holders’ priority of payment).
However, the Company acknowledges that nothing set forth in the paragraph 6B (or in the definition
of Qualified Redeemable Preferred Stock or clause (xvi) of paragraph 7A below) modifies or
restricts the application of paragraph 4D, and if a Change in Control or a Change in Management
occurs then the provisions of paragraph 4D shall
apply and the holders of Notes that accept the Company’s offer to prepay pursuant to paragraph
4D shall be entitled to be paid in accordance therewith.

 

25

 

6C. Liens. The Company will not, and will not permit any of its Subsidiaries to, directly or
indirectly create, incur, assume or permit to exist (upon the happening of a contingency or
otherwise) any Lien on or with respect to any Property or asset (including, without limitation, any
document or instrument in respect of goods or accounts receivable) of the Company or any such
Subsidiary, whether now owned or held or hereafter acquired, or any income or profits therefrom
(whether or not provision is made for the equal and ratable securing of the Notes in accordance
with the provisions of paragraph 5D), or assign or otherwise convey any right to receive income or
profits, except:

(i) Liens for taxes, assessments or other governmental levies or charges which
are not yet due or which are being contested in good faith by the Company or any Subsidiary
for which adequate reserves have been taken in accordance with GAAP;

(ii) statutory Liens of landlords and Liens of carriers, contractors,
warehousemen, mechanics and materialmen incurred in the ordinary course of business for sums
not yet due or are being contested in good faith by the Company or any Subsidiary and for
which adequate reserves have been taken in accordance with GAAP;

(iii) Liens (other than any Lien imposed by ERISA) incurred, or deposits made,
in the ordinary course of business (a) in connection with workers’ compensation,
unemployment insurance, old age benefit and other types of social security, (b) to secure
(or to obtain letters of credit that secure) the performance of tenders, statutory
obligations, surety bonds, appeal bonds (not in excess of $500,000 in the aggregate at any
time), bids, leases (other than Capital Leases), performance bonds, purchase, construction
or sales contracts and other similar obligations or (c) otherwise to satisfy statutory or
legal obligations; provided that in each such case such Liens (I) were not incurred
or made in connection with the incurrence or maintenance of Indebtedness, the borrowing of
money or the obtaining of advances or credit and (II) do not, in the aggregate, materially
detract from the value of the Property so encumbered or materially impair the use thereof in
the operation of the business of the Company or such Subsidiary;

(iv) any attachment or judgment Lien, unless the judgment it secures shall
not, within 30 days after the entry thereof, have been discharged or execution thereof
stayed pending appeal, or shall not have been discharged within 30 days after the expiration
of any such stay; provided that such attachment or judgment Liens shall not secure
obligations (other than obligations that arise from claims that are covered by insurance and
as to which the insurance carrier has confirmed coverage) in excess of $300,000 in the
aggregate at any time;

(v) leases or subleases granted to others, easements, rights-of-way,
restrictions and other similar charges or encumbrances, in each case incidental to, and not
interfering with, the ordinary conduct of the business of the Company or any of its
Subsidiaries, provided that such Liens do not, in the aggregate, materially detract
from the value of the
Property so encumbered or materially impair the use thereof in the operation of the
business of the Company or such Subsidiary;

 

26

 

(vi) [intentionally omitted]

(vii) Liens in existence on the date hereof as set forth on Schedule
6C attached hereto;

(viii) Liens securing the Notes;

(ix) Liens in favor of the Bank Agent for the benefit of the Banks under the
Bank Agreement and Liens in favor of any Bank or any Affiliate of a Bank under any Swap
agreement between the Company or any Subsidiary and such Bank or Affiliate of a Bank while
such Person (or in the case of its Affiliate, the Person affiliated therewith) is a Bank
under the Bank Agreement;

(x) Liens securing obligations arising under operating agreements, unitization
and pooling agreements and orders, farmout agreements, gas balancing agreements and other
agreements, in each case that are customary in the oil, gas and mineral production business
in the general area of such property and that are entered into in the ordinary course of
business in good faith;

(xi) Liens arising under the Participation Agreement, as in effect on December
31, 2006, in connection with the PVOG Production Payment;

(xii) Liens arising under royalties, overriding royalties, net profits
interests, production payments, reversionary interests, calls on production, preferential
purchase rights and other burdens on or deductions from the proceeds of production, that do
not secure Indebtedness for borrowed money and that are taken into account in computing the
net revenue interests and working interests of the Company warranted in the Security
Documents; and

(xiii) minor imperfections of title or Liens that do not secure Indebtedness
or other extensions of credit and do not materially impair the development, operation or
value of the property in its intended use or title thereto and which are of a nature
commonly existing with respect to properties of similar character.

6D. Indebtedness. The Company will not, and will not permit any Subsidiary to, create incur,
assume or suffer to exist any Indebtedness, except;

(i) Indebtedness of the Company under the Bank Agreement and Guarantees by
Subsidiaries executed in connection therewith;

(ii) Indebtedness of any Subsidiary to the Company or a Wholly Owned
Subsidiary;

 

27

 

(iii) Indebtedness arising under operating agreements, unitization and pooling
agreements and orders, farmout agreements, gas balancing agreements and other agreements, in
each case that are customary in the oil, gas and mineral production business in the general
area of such property and that are entered into in the ordinary course of business in good
faith.;

(iv) Indebtedness arising under hedging arrangements pursuant to paragraph 5M;

(v) Indebtedness arising under Participation Agreement in connection with the
PVOG Production Payment; and

(vi) other Indebtedness of the Company (other than Indebtedness to any
Subsidiary), that is created, incurred or assumed after the Series A Closing in compliance,
on a pro forma basis, with paragraphs 6A(1) and 6A(2).

6E. Loans, Advances, Investments and Contingent Liabilities. The Company will not, and will
not permit any Subsidiary to, make or permit to remain outstanding any loan or advance to, or
extend credit (other than credit extended in the normal course of business to any Person who is not
an Affiliate of the Company) to, or own, purchase or acquire any stock, obligations or securities
of, or any other interest in, or make any capital contribution to, any Person, or enter into or
permit to exist any Guarantee in respect of the obligations of any other Person, or commit to do
any of the foregoing, (all of the foregoing collectively being “Investments”), except for
the Investments set forth in clauses (i) — (xiii) below (collectively, “Permitted Investments”):

(i) Investments in existence on the date hereof and described on Schedule
6E attached hereto;

(ii) loans or advances to any Wholly Owned Subsidiary that is a Guarantor;
provided, that no such loans or advances may be made to Diamond after July 15, 2007
except to the extent necessary to fund capital expenditures by Diamond that are necessary
and appropriate to maintain the existing three drilling rigs in service, including the
initial placement of the third drilling rig in service (it being understood and agreed that
the foregoing shall require the Company to obtain the consent of the Required Holders in
order for the Company or any Subsidiary to make loans or advances to Diamond in order to
permit Diamond to acquire an additional drilling rig);

(iii) stock, obligations or other securities of, or capital contributions to,
a Wholly Owned Subsidiary that is a Guarantor or a Person which immediately after the
purchase or acquisition of such stock, obligations or other securities will be a Wholly
Owned Subsidiary that is a Guarantor; provided, that the foregoing shall not permit
the Company or any Subsidiary, after July 15, 2007, to purchase or acquire any stock,
obligations or securities of, or any other interest in, or to make any capital contribution
to, Diamond, or to commit to do any of the foregoing, except to the extent necessary to fund
capital expenditures by Diamond that and necessary and appropriate to maintain the existing three drilling rigs in service, including the initial placement of the third
drilling rig in service (it being understood and agreed that the foregoing shall require the
Company to obtain the consent of the Required Holders in order for the Company or any
Subsidiary to purchase or acquire any stock, obligations or securities of, or any other
interest in, or to make any capital contribution to, Diamond, or to commit to do any of the
foregoing, in order to permit Diamond to acquire an additional drilling rig);

 

28

 

(iv) obligations backed by the full faith and credit of the United States
Government (whether issued by the United States Government or an agency thereof), and
obligations guaranteed by the United States Government, in each case which mature within one
year from the date acquired;

(v) demand and time deposits with, Eurodollar deposits with or certificates of
deposit issued by (a) Capital One, National Association or Union Bank of California, N.A.
or (b) any commercial bank or trust company (1) organized under the laws of the United
States or any of its states or having branch offices therein, (2) having equity capital in
excess of $500,000,000 and (3) whose long-term unsecured debt obligations (or the long-term
unsecured debt obligations of the bank holding company owning all of the capital stock of
such bank or trust company) shall have been given a rating of “A” or better by S&P, “A2” or
better by Moody’s, in each case payable in the United States in United States dollars, in
each case which mature within one year from the date acquired;

(vi) readily marketable commercial paper rated as A-1 or better by S&P or
Prime-1 or better by Moody’s and maturing not more than 270 days from the date of creation
thereof;

(vii) bonds, debentures, notes or similar debt instruments issued by a state
or municipality given a “AA” rating or better by S&P or an equivalent rating by another
nationally recognized credit rating agency and maturing not more than one year from the date
acquired;

(viii) negotiable instruments endorsed for collection in the ordinary course
of business;

(ix) Investments arising from transactions by the Company or any Subsidiary
with customers or suppliers that are not Affiliates or otherwise in settlement of debt
(including Investments received in settlement of trade receivables which trade receivables
are fully reserved against on the books of the Company or such Subsidiary or are less than
one year overdue) in the ordinary course of business;

(x) Guarantees of the Obligations by the Guarantors;

(xi) Guarantees of obligations of the Company under the Bank Agreement by the
Guarantors;

(xii) advances made pursuant to operating agreements, unitization and pooling
agreements and orders, farmout agreements and gas balancing agreements, in each case
that are customary in the oil, gas and mineral production business and that are entered
into in the ordinary course of business; and

 

29

 

(xiii) Investments other than those set forth in the preceding clause (i) -
(xii); provided that (a) the aggregate amount of such Investments, valued at the
original cost thereof, shall not exceed $250,000 at any time and (b) none of such
Investments shall be made in Diamond.

Notwithstanding the foregoing, no Subsidiary shall make any loan or advance to, or acquire any
stock, obligations or securities of, the Company.

6F. Merger, Consolidation, Etc. The Company will not and will not permit any Subsidiary to
merge or consolidate with or into any other Person or convey, transfer or lease all or
substantially all of its assets to any Person, except that:

(i) any Subsidiary may merge or consolidate with or into the Company;
provided that the Company is the continuing or surviving entity;

(ii) any Subsidiary may merge or consolidate with or into a Wholly Owned
Subsidiary that is a Guarantor; provided that such Wholly Owned Subsidiary is the
continuing or surviving entity; and

(iii) the Company may merge or consolidate with or into, or convey all or
substantially all its assets to, a corporation that is not a Subsidiary, provided,
that

(a) the successor formed by such consolidation or the survivor of such merger
or the Person that acquires by conveyance all or substantially all of the assets of
the Company, as the case may be (the “Successor Corporation”), shall (1) be a
Solvent corporation organized and existing under the laws of the United States of
America, any State thereof or the District of Columbia, (2) after giving effect to
such consolidation, merger or conveyance, have a Consolidated Tangible Net Worth at
least as great as that of the Company immediately prior thereto and (3) if the
Company is not the Successor Corporation, be a Qualifying Public Company ;

(b) if the Company is not the Successor Corporation, such corporation shall
have executed and delivered to each holder of Notes its assumption of the due and
punctual performance and observance of each covenant and condition of this
Agreement, the Notes and each other Note Document to which the Company is a party;
and

(c) immediately after giving effect to such transaction no Default or Event of
Default would exist. No such conveyance of all or substantially all of the assets
of the Company shall have the effect of releasing the Company or any Successor
Corporation from its liability under this Agreement, the Notes or any other Note
Document to which it is a party.

 

30

 

6G. Sale of Assets, Etc. The Company will not, and will not permit any Subsidiary to, sell,
assign, farm-out, convey or otherwise transfer any Property (including, without limitation, the
sale or other transfer of any Equity Interest in a Subsidiary or the issuance of any Equity
Interest by a Subsidiary to any Person other than the Company or a Wholly Owned Subsidiary)
except for (i) the sale of Hydrocarbons or other inventory of a Subsidiary sold in the
ordinary course of business, (ii) the sale or transfer of equipment (other than drilling rigs) that
is no longer necessary for the business of the Company or such Subsidiary or is replaced by
equipment of at least comparable value and use, (iii) the transfer by sale, trade, farm-out or
otherwise of prospects, undeveloped Oil and Gas Properties, Oil and Gas Properties not known to
contain Proved Reserves and Property relating to any of the foregoing in the ordinary course of
business of the Company and its Subsidiaries, (iv) the sale, trade, license, farm-out, or other
similar disposition of geological and seismic data in the ordinary course of business of the
Company or its Subsidiaries and (v) the sale or transfer of any Oil and Gas Properties or other
Property (other than drilling rigs) that is on an arm’s-length basis and that, in the aggregate
during any period of 12 consecutive months, has a Fair Market Value no greater than 5% of Adjusted
PV10 as reflected in the Engineer’s Report most recently delivered pursuant to paragraph 5A(v) or
paragraph 3A(xxvii), as the case may be, provided that, with respect to any sale,
assignment, farm-out, conveyance or other transfer of any Oil and Gas Property pursuant to this
clause (v), (A) the Company would be in compliance with paragraph 6A(1) determined as of the last
day of the fiscal quarter most recently ended, after giving pro forma effect to such sale or
transfer, and (B) no later than five Business Days immediately prior to such sale or transfer, the
Company shall have delivered to the Required Holders a certificate of an Authorized Officer of the
Company certifying that any such sale or transfer would be permitted by this clause (v) (which
certificate shall have attached thereto reasonably detailed back-up data and calculations showing
such compliance) and identifying the applicable Property and the price and other terms of the
applicable sale or transfer.

So long as no Default or Event of Default has occurred and is continuing at the time of the
applicable sale or transfer pursuant to clause (v) of the preceding paragraph: (a) if the Company
states in the certificate delivered pursuant to the last sentence of the preceding paragraph that
the Company or the relevant Subsidiary intends to reinvest, within 180 days after the applicable
sale or transfer, the Net Cash Proceeds thereof in property or assets similar to the property or
assets that were subject to such sale or transfer, no prepayment of the Notes pursuant to paragraph
4A shall be required with respect to such Net Cash Proceeds so long as such Net Cash Proceeds are
in fact so reinvested within such 180-day period, and (b) in any event, no prepayment of the Notes
shall be required in respect of any sale or transfer in any fiscal year of the Company to the
extent that the aggregate Net Cash Proceeds received on account of all sales or transfers during
the period of 12 consecutive months most recently ended (and not reinvested as contemplated by
clause (a) above) does not exceed $500,000.

6H. Sale or Discount of Receivables. The Company will not and will not permit any Subsidiary
to sell with recourse, or discount or otherwise sell for less than the face value thereof, any of
its notes or accounts receivable, other than the discounting or sale of receivables without
recourse in order to compromise or collect the same.

 

31

 

6I. Line of Business. The Company will not change, and will not permit any Subsidiary to
change, in any material respect the nature of its business or operations from the business
conducted by the Company and its Subsidiaries on the date hereof and will not engage, and will not
permit any Subsidiary to engage directly or indirectly in any material business activity, or
purchase or otherwise acquire any material Property, in either case not directly related to the
conduct of its business or operations as presently carried on.

6J. Terrorism Sanctions Regulations. The Company will not and will not permit any Subsidiary
to (i) become a Person described or designated in the Specially Designated Nationals and Blocked
Persons List of the Office of Foreign Assets Control or in Section 1 of the Anti-Terrorism Order or
(ii) engage in any dealings or transactions with any such Person.

6K. Related Party Transactions. The Company will not and will not permit any Subsidiary to
directly or indirectly, purchase, acquire or lease any Property from, or sell, transfer or lease
any Property to, or otherwise deal with, in the ordinary course of business or otherwise any
Related Party except in the ordinary course of business and upon terms that are no less
favorable to the Company or such Subsidiary, as the case may be, than those that could be obtained
in an arm’s-length transaction with an unrelated third party; provided that the foregoing
shall not apply to (i) any transaction between the Company and any Wholly Owned Subsidiary that is
a Guarantor or between Wholly Owned Subsidiaries that are Guarantors and (ii) sales to, or
purchases (within the limitations of paragraph 6B) from, any such Related Party of shares of common
Equity Interests for cash consideration equal to the Fair Market Value thereof (except pursuant to
employee stock option, stock appreciation and similar stock-based incentive plans applicable to
employees of the Company that have been approved by a majority of the Company’s outside directors).

6L. Issuance of Stock by Subsidiaries. The Company will not permit any Subsidiary (either
directly, or indirectly by the issuance of rights or options for, or securities convertible into,
such shares or other Equity Interests) to issue, sell or dispose of any shares of its stock (or
equivalent Equity Interests) of any class except (i) for directors’ qualifying shares (or
equivalent Equity Interests) or other shares (or equivalent Equity Interests) issued to comply with
local ownership legal requirements (but not in excess of the minimum number of shares (or
equivalent Equity Interests) necessary to satisfy such requirement) and (ii) to the Company or a
Wholly Owned Subsidiary that is a Guarantor.

6M. Subsidiary Restrictions. The Company will not and will not permit any Subsidiary to enter
into, or be otherwise subject to, any contract, agreement or other binding obligation that directly
or indirectly limits the amount of, or otherwise restricts (i) the payment to the Company of
dividends or other redemptions or distributions with respect to its capital stock by any Subsidiary
(exclusive of restrictions on such payments, redemptions or distributions with respect to Minority
Interests), (ii) the repayment to the Company by any Subsidiary of intercompany loans or advances,
or (iii) other intercompany transfers to the Company of Property or other assets by Subsidiaries
(exclusive of restrictions on such transfers which benefit Minority Interests).

 

32

 

6N. Maintenance of Credit Facility. The Company will at all times maintain a committed,
revolving credit facility with a remaining term of at least 6 months and maintain the Borrowing
Base thereunder in an amount not less than $50,000,000.

6O. Swap Agreements. The Company will not, and will not permit any Subsidiary to, enter into
any Swaps with any Person other than (i) Swaps in respect of commodities with an Approved
Counterparty and otherwise in compliance with paragraph 5M, (ii) Swaps in respect of interest rates
with an Approved Counterparty and not for speculative purposes and (iii) Swaps required under
paragraph 5M.

6P. Prohibition Against Layering. The Company will not and will not permit any Subsidiary to
incur, create, issue, assume, guarantee or in any other manner become directly or indirectly liable
with respect to or responsible for, or permit to remain outstanding, any Indebtedness (including,
without limitation, Indebtedness permitted pursuant to paragraphs 6A(1), 6A(2) and 6D) that is
subordinate or junior in right of payment to any Indebtedness under the Bank Agreement or any
Guarantee in respect thereof unless such Indebtedness is also unsecured and subordinate in right of
payment to the Notes and all Guarantees in respect thereof, as the case may be, upon terms
satisfactory to the Required Holder(s).

6Q. Qualified Redeemable Preferred Stock. The Company will not enter into the initial closing
and funding of any Qualified Redeemable Preferred Stock without the prior written consent of the
Required Holders as to the form and substance of the documentation pertaining thereto, based upon
the receipt by the holders of the Notes of an Officer’s Certificate attaching true, correct and
complete copies thereof (including, without limitation, a copy of the prospectus or other offering
document for such Qualified Redeemable Preferred Stock). The Company will not enter into or agree
to any amendment, modification or waiver of any term or condition of, or any of its rights under,
the documents pertaining to any issued Qualified Redeemable Preferred Stock, which amendment,
modification or waiver could, in the reasonable opinion of the Required Holders, materially and
adversely affect the interests of the holders of the Notes.

6R. Limitation on Number of Drilling Rigs. The Company will not and will not permit Diamond
or any other Subsidiary to own any drilling rig other than the three drilling rigs owned by Diamond
on July 15, 2007.

7. EVENTS OF DEFAULT.

7A. Acceleration. If any of the following events shall occur and be continuing for any reason
whatsoever (and whether such occurrence shall be voluntary or involuntary or come about or be
effected by operation of law or otherwise):

(i) the Company defaults in the payment of (a) any principal of or
Yield-Maintenance Amount or Breakage Cost Obligations payable with respect to, any Note when
the same shall become due, either by the terms thereof or otherwise as herein provided, or
(b) any interest on any Note within three days after the same shall become due; or

 

33

 

(ii) the Company or any Subsidiary defaults (whether as primary obligor or as
guarantor or other surety) under the PVOG Production Payment or in any payment of principal
of or interest on any obligation for money borrowed (or any Capitalized Lease Obligation,
any obligation under a conditional sale or other title retention agreement, any obligation
issued or assumed as full or partial payment for Property whether or not secured by a
purchase money mortgage or any obligation under notes payable or drafts accepted
representing extensions of credit) in excess of $500,000 beyond any period of grace provided
with respect thereto, or the Company or any Subsidiary fails to perform or observe any other
agreement, term or condition contained in any agreement under which any such obligation is
created (or if any other event thereunder or under any such agreement shall occur and be
continuing) and the effect of such failure or other event is to cause, or to permit the
holder or holders of such obligation (or a trustee on behalf of such holder or holders) to
cause, such obligation to become due (or to be repurchased by the Company or any Subsidiary)
prior to any stated maturity; or

(iii) any representation or warranty made by the Company or any Subsidiary
herein or in any Note Document or by the Company, any Subsidiary or any of their respective
officers in any writing furnished in connection with or pursuant to this Agreement or any
Note Document shall be false in any material respect on the date as of which made; or

(iv) the Company fails to perform or observe any term, covenant or agreement
contained in the last sentence of paragraph 5A or in any of paragraphs 5G (as to the Company
and the Guarantors), 5M or 6; or

(v) the Company fails to perform or observe any other term, covenant,
agreement or condition contained herein and such failure shall not be remedied within 30
days after any Responsible Officer obtains actual knowledge thereof; or

(vi) the Company or any Subsidiary makes an assignment for the benefit of
creditors or is generally not paying its debts as such debts become due; or

(vii) any decree or order for relief in respect of the Company or any
Subsidiary is entered under any bankruptcy, reorganization, compromise, arrangement,
insolvency, readjustment of debt, dissolution or liquidation or similar law, whether now or
hereafter in effect (the “Bankruptcy Law”), of any jurisdiction; or

(viii) the Company or any Subsidiary petitions or applies to any tribunal for,
or consents to, the appointment of, or taking possession by, a trustee, receiver, custodian,
liquidator or similar official of the Company or any Subsidiary, or of any substantial part
of the assets of the Company or any Subsidiary, or commences a voluntary case under the
Bankruptcy Law of the United States or any proceedings (other than proceedings for the
voluntary liquidation and dissolution of a Subsidiary) relating to the Company or any
Subsidiary under the Bankruptcy Law of any other jurisdiction; or

 

34

 

(ix) any such petition or application is filed, or any such proceedings are
commenced, against the Company or any Subsidiary and the Company or such Subsidiary by any
act indicates its approval thereof, consent thereto or acquiescence therein, or an order,
judgment or decree is entered appointing any such trustee, receiver, custodian, liquidator
or similar official, or approving the petition in any such proceedings, and such order,
judgment or decree remains unstayed and in effect for more than 30 days; or

(x) any order, judgment or decree is entered in any proceedings against the
Company decreeing the dissolution of the Company and such order, judgment or decree remains
unstayed and in effect for more than 60 days; or

(xi) any order, judgment or decree is entered in any proceedings against the
Company or any Subsidiary decreeing a split-up of the Company or such Subsidiary which
requires the divestiture of assets representing a substantial part, or the divestiture of
the stock of a Subsidiary whose assets represent a substantial part, of the consolidated
assets of the Company and its Subsidiaries (determined in accordance with GAAP) or which
requires the divestiture of assets, or stock of a Subsidiary, which shall have contributed a
substantial part of the consolidated net income of the Company and its Subsidiaries
(determined in accordance with GAAP) for any of the three fiscal years then most recently
ended, and such order, judgment or decree remains unstayed and in effect for more than 60
days; or

(xii) one or more judgments or orders in an aggregate amount in excess of
$300,000 (excluding amounts, in excess of any applicable deductibles, covered by insurance
under which the applicable insurer has accepted liability) is rendered against the Company
or any Subsidiary and either (a) enforcement proceedings have been commenced by any creditor
upon any such judgment or order or (b) within 30 days after entry thereof, such judgment is
not discharged or execution thereof stayed pending appeal, or within 30 days after the
expiration of any such stay, such judgment is not discharged; or

(xiii) (a) any Plan shall fail to satisfy the minimum funding standards of
ERISA or the Code for any plan year or part thereof or a waiver of such standards or
extension of any amortization period is sought or granted under Section 412 of the Code, (b)
a notice of intent to terminate any Plan shall have been or is reasonably expected to be
filed with the PBGC or the PBGC shall have instituted proceedings under ERISA Section 4042
to terminate or appoint a trustee to administer any Plan or the PBGC shall have notified the
Company or any ERISA Affiliate that a Plan may become a subject of such proceedings, (c) the
aggregate “amount of unfunded benefit liabilities” (within the meaning of Section
4001(a)(18) of ERISA) under all Plans, determined in accordance with Title IV of ERISA,
shall exceed $1,000,000, (d) the Company or any ERISA Affiliate shall have incurred or is
reasonably expected to incur any liability pursuant to Title I or IV of ERISA or the penalty
or excise tax provisions of the Code relating to employee benefit plans, (e) the Company or
any ERISA Affiliate withdraws from any Multiemployer Plan, or (f) the Company or any
Subsidiary establishes or amends any employee welfare
benefit plan that provides post-employment welfare benefits in a manner that would
materially increase the liability of the Company or any Subsidiary thereunder; or

 

35

 

(xiv) any material provision of any Note Document for any reason ceases to be
valid and binding on, or enforceable against, the Company or any Subsidiary, as applicable
(except to the extent such provision is released in writing by the Required Holder(s)), or
the Company or any Subsidiary, as applicable, so states in writing; or

(xv) any Guaranty Agreement or any Security Document, for any reason other
than satisfaction in full of the Obligations or the written release thereof by the holders
of all Notes, ceases to be in full force and effect or is declared null and void, or the
validity or enforceability thereof is contested in a judicial proceeding or the Company, any
Guarantor or any other party thereto denies such party’s liability under any Guaranty
Agreement or any Security Document, as the case may be, or any of the Security Documents,
after delivery thereof, shall for any reason, except to the extent permitted by the terms
hereof and thereof, cease to create a valid and perfected first-priority (subject, in the
case of collateral other than First Lien Collateral, to the prior Liens in favor of the Bank
Agent) security interest in any of the collateral purported to be covered thereby; or

(xvi) (a) the Company defaults in the payment of any amount due under, or in
the observance or performance of any of the covenants or agreements contained in, any
document pertaining to any Qualified Redeemable Preferred Stock and any grace period
applicable to such default has elapsed; or (b) any shares of Qualified Redeemable Preferred
Stock shall for any reason become subject to mandatory redemption by the Company before the
latest final maturity date for any Note or if any event or condition occurs that enables or
permits (with or without the giving of notice, the lapse of time or both) the holder of any
 shares of any Qualified Redeemable Preferred Stock to cause any of such shares to be
redeemable or to require the redemption thereof by the Company (in each case after giving
effect to any applicable cure period), except as to all of this subclause (b) for a
mandatory redemption following a Change in Control or a Change in Management (as
contemplated by paragraph 4D); or (c) any judgment for redemption of any shares of Qualified
Redeemable Preferred Stock is rendered by any court or other Governmental Authority except
to enforce a mandatory redemption following a Change in Control or Change in Management (as
contemplated by paragraph 4D); it being understood, for the avoidance of doubt, that nothing
in this clause (xvi) modifies or restricts the application of paragraph 4D, paragraph 6B or
paragraph 6Q, nor does this clause (xvi) modify or limit clause (iv) of this paragraph 7A;

then (a) if such event is an Event of Default specified in clause (i) of this paragraph 7A, any
holder of any Note may at its option, by notice in writing to the Company, declare all of the Notes
held by such holder to be, and all of the Notes held by such holder shall thereupon be and become,
immediately due and payable at par together with interest accrued thereon, without presentment,
demand, protest or notice of any kind, all of which are hereby waived by the Company, (b) if such
event is an Event of Default specified in clause (vii), (viii) or (ix) of this paragraph 7A with
respect to the Company, all of the Notes at the time outstanding shall automatically become
immediately due and payable at par together with interest accrued thereon

 

36

 

and together with the Yield-Maintenance Amount and Breakage Cost Obligations, if any, with respect
to each Note, without presentment, demand, protest or notice of any kind, all of which are hereby
waived by the Company, and (c) if such event is any Event of Default other than as specified in
preceding clause (b), the Required Holder(s) of the Notes may at its or their option by notice in
writing to the Company, declare all of the Notes to be, and all of the Notes shall thereupon be and
become, immediately due and payable together with interest accrued thereon and together with the
Yield-Maintenance Amount and Breakage Cost Obligations, if any, with respect to each Note, without
presentment, demand, protest or notice of any kind, all of which are hereby waived by the Company.

The Company acknowledges, and the parties hereto agree, that each holder of a Note has the
right to maintain its investment in the Notes free from repayment by the Company (except as herein
specifically provided for) and that the provision for payment of the Yield-Maintenance Amount by
the Company in the event that the Notes are prepaid or are accelerated as a result of an Event of
Default, is intended to provide compensation for the deprivation of such right under such
circumstances.

7B. Rescission of Acceleration. At any time after any or all of the Notes shall have been
declared immediately due and payable pursuant to paragraph 7A, the Required Holder(s) may, by
notice in writing to the Company, rescind and annul such declaration and its consequences if (i)
the Company shall have paid all overdue interest on the Notes, the principal of and
Yield-Maintenance Amount and Breakage Cost Obligations, if any, payable with respect to any Notes
which have become due otherwise than by reason of such declaration, and interest on such overdue
interest and overdue principal and Yield Maintenance Amount and Breakage Cost Obligations at the
rate specified in the Notes, (ii) the Company shall not have paid any amounts which have become due
solely by reason of such declaration, (iii) all Events of Default and Defaults, other than
non-payment of amounts which have become due solely by reason of such declaration, shall have been
cured or waived pursuant to paragraph 11C, and (iv) no judgment or decree shall have been entered
for the payment of any amounts due pursuant to the Notes or this Agreement. No such rescission or
annulment shall extend to or affect any subsequent Event of Default or Default or impair any right
arising therefrom.

7C. Notice of Acceleration or Rescission. Whenever any Note shall be declared
immediately due and payable pursuant to paragraph 7A or any such declaration shall be rescinded and
annulled pursuant to paragraph 7B, the Company shall forthwith give written notice thereof to the
holder of each Note at the time outstanding.

7D. Other Remedies. If any Event of Default or Default shall occur and be continuing,
the holder of any Note may proceed to protect and enforce its rights under this Agreement, such
Note and the other Note Documents by exercising such remedies as are available to such holder in
respect thereof under applicable law, either by suit in equity or by action at law, or both,
whether for specific performance of any covenant or other agreement contained in this Agreement or
any other Note Document or in aid of the exercise of any power granted in this Agreement or any
other Note Document. No remedy conferred in this Agreement or any other Note Document upon the
holder of any Note is intended to be exclusive of any other remedy, and each and every such remedy
shall be cumulative and shall be in addition to every
other remedy conferred herein or therein or now or hereafter existing at law or in equity or
by statute or otherwise.

 

37

 

8. REPRESENTATIONS, COVENANTS AND WARRANTIES. The Company represents, covenants and
warrants as follows (all references to “Subsidiary” and “Subsidiaries” in this paragraph 8 shall be
deemed omitted if the Company has no Subsidiaries at the time the representations herein are made
or repeated):

8A. Organization. The Company is a corporation duly organized and validly existing in
good standing under the laws of the State of Oklahoma, each Subsidiary is duly organized and
validly existing in good standing under the laws of the jurisdiction in which it is organized, and
the Company has and each Subsidiary has the corporate (or similar) power to own its respective
Property and to carry on its respective business as now being conducted. The execution, delivery
and performance by the Company of this Agreement and the Notes are within the Company’s corporate
powers and have been duly authorized by all necessary corporate action.

8B. Financial Statements. The Company has furnished to each Purchaser of the Series A
Notes and any Additional Notes with the following financial statements, identified by a principal
financial officer of the Company: (i) a consolidated balance sheet of the Company and its
Subsidiaries as at December 31 in each of the three fiscal years of the Company most recently
completed prior to the date as of which this representation is made or repeated to such Purchaser
(other than fiscal years completed within 120 days prior to such date for which audited financial
statements have not been released) and consolidated statements of income, cash flows and
shareholders’ equity of the Company and its Subsidiaries for each such year, all reported on by
Smith, Carney & Co., p.c.; and (ii) a consolidated balance sheet of the Company and its
Subsidiaries as at the end of the quarterly period (if any) most recently completed prior to such
date and after the end of such fiscal year (other than quarterly periods completed within 60 days
prior to such date for which financial statements have not been released) and the comparable
quarterly period in the preceding fiscal year and consolidated statements of income, cash flows and
shareholders’ equity for the periods from the beginning of the fiscal years in which such quarterly
periods are included to the end of such quarterly periods, prepared by the Company. Such financial
statements (including any related schedules and/or notes) are true and correct in all material
respects (subject, as to interim statements, to changes resulting from audits and year-end
adjustments), have been prepared in accordance with GAAP consistently followed throughout the
periods involved and show all liabilities, direct and contingent, of the Company and its
Subsidiaries required to be shown in accordance with such principles. The balance sheets fairly
present the condition of the Company and its Subsidiaries as at the dates thereof, and the
statements of income, cash flows and shareholders’ equity fairly present the results of the
operations of the Company and its Subsidiaries and their cash flows for the periods indicated.
There has occurred no event having, or which would reasonably be expected to have, a Material
Adverse Effect since the end of the most recent fiscal year for which such audited financial
statements have been furnished.

 

38

 

8C. Actions Pending. There is no action, suit, investigation or proceeding pending or,
to the knowledge of the Company, threatened against the Company or any of its
Subsidiaries, or any Properties or rights of the Company or any of its Subsidiaries, by or
before any court, arbitrator or administrative or governmental body which might result in any
material adverse change in the business, property or assets, condition (financial or otherwise) or
operations of the Company and its Subsidiaries taken as a whole. There is no action, suit,
investigation or proceeding pending or, to the knowledge of the Company, threatened against the
Company or any of its Subsidiaries which purports to affect the validity or enforceability of this
Agreement or any Note.

8D. Outstanding Debt. Neither the Company nor any of its Subsidiaries has outstanding
any Indebtedness except as permitted by paragraph 6D. There exists no default under the provisions
of any instrument evidencing such Indebtedness or of any agreement relating thereto.

8E. Title to Properties; Mortgaged Properties. The Company has and each of its
Subsidiaries has good and indefeasible title to its respective real Properties (other than office
space and equipment which it leases), including the Oil and Gas Properties, and good title to all
of its other respective Properties and assets, including the Properties and assets reflected in the
most recent audited balance sheet referred to in paragraph 8B (other than Properties and assets
disposed of in the ordinary course of business and Properties and assets with an aggregate Fair
Market Value of less than $250,000), subject to no Lien of any kind except Liens permitted by
paragraph 6C. All leases necessary in any material respect for the conduct of the respective
businesses of the Company and its Subsidiaries, and all leases constituting Hydrocarbon Interests
to which there are attributed Proved Reserves, are valid and subsisting and are in full force and
effect. The value of the Oil and Gas Properties subject to the Liens in favor of the Collateral
Agent under the Security Documents represent not less than 95% of the value of all Oil and Gas
Properties as reflected in the most recent Engineering Report delivered by the Company pursuant to
clause (xxvii) of paragraph 3A or clause (v) of paragraph 5A, as applicable.

8F. Taxes. The Company has and each of its Subsidiaries has filed all federal, state and
other income tax returns which, to the best knowledge of the officers of the Company and its
Subsidiaries, are required to be filed, and each has paid all taxes as shown on such returns and on
all assessments received by it to the extent that such taxes have become due, except such taxes as
are being contested in good faith by appropriate proceedings for which adequate reserves have been
established in accordance with GAAP.

8G. Conflicting Agreements and Other Matters. Neither the Company nor any of its
Subsidiaries is a party to any contract or agreement or subject to any charter or other corporate
restriction which would reasonably be expected to have a Material Adverse Effect. Neither the
execution nor delivery of this Agreement, the Notes or any other Note Document, nor the offering,
issuance and sale of the Notes, nor the granting of the Liens under the Security Documents, nor
fulfillment of nor compliance with the terms and provisions hereof and of the Notes and the other
Note Documents will conflict with, or result in a breach of the terms, conditions or provisions of,
or constitute a default under, or result in any violation of, or result in the creation of any Lien
upon any of the Properties or assets of the Company or any of its Subsidiaries pursuant to, the
charter or corporate agreement (or equivalent constitutive document) of the Company or any of its
Subsidiaries, any award of any arbitrator or any

 

39

 

agreement (including any agreement with shareholders), instrument, order, judgment, decree,
statute, law, rule or regulation to which the Company or any of its Subsidiaries is subject.
Neither the Company nor any of its Subsidiaries is a party to, or otherwise subject to any
provision contained in, any instrument evidencing Indebtedness of the Company or such Subsidiary,
any agreement relating thereto or any other contract or agreement (including its charter) which
limits the amount of, or otherwise imposes restrictions on the incurring of, (i) Indebtedness of
the Company of the type to be evidenced by the Notes or (ii) Indebtedness of any Guarantor of the
type to be evidenced by the Guaranty Agreement, except as set forth in the agreements listed in
Schedule 8G attached hereto.

8H. Offering of Notes. Neither the Company nor any agent acting on its behalf has,
directly or indirectly, offered the Notes or any similar security of the Company for sale to, or
solicited any offers to buy the Notes or any similar security of the Company from, or otherwise
approached or negotiated with respect thereto with, any Person other than institutional investors,
and neither the Company nor any agent acting on its behalf has taken or will take any action which
would subject the issuance or sale of the Notes to the provisions of Section 5 of the Securities
Act or to the provisions of any securities or Blue Sky law of any applicable jurisdiction. .

8I. Use of Proceeds. The proceeds of the Series A Notes will be used to repay existing
Indebtedness of the Company or for general corporate purposes. None of the proceeds of the sale of
any Notes will be used, directly or indirectly, for the purpose, whether immediate, incidental or
ultimate, of purchasing or carrying any “margin stock” as defined in Regulation U (12 CFR Part 221)
of the Board of Governors of the Federal Reserve System (“margin stock”) or for the purpose of
maintaining, reducing or retiring any Indebtedness which was originally incurred to purchase or
carry any stock that is then currently a margin stock or for any other purpose which might
constitute the purchase of such Notes a “purpose credit” within the meaning of such Regulation U,
unless the Company shall have delivered to the Purchaser which is purchasing such Notes, on the
Closing Day for such Notes, an opinion of counsel satisfactory to such Purchaser stating that the
purchase of such Notes does not constitute a violation of such Regulation U. Neither the Company
nor any agent acting on its behalf has taken or will take any action which might cause this
Agreement or the Notes to violate Regulation T, Regulation U or any other regulation of the Board
of Governors of the Federal Reserve System or to violate the Exchange Act, in each case as in
effect now or as the same may hereafter be in effect.

8J. ERISA. No accumulated funding deficiency (as defined in section 302 of ERISA and
section 412 of the Code), whether or not waived, exists with respect to any Plan (other than a
Multiemployer Plan). No liability to the PBGC has been or is expected by the Company or any ERISA
Affiliate to be incurred with respect to any Plan (other than a Multiemployer Plan) by the Company,
any Subsidiary or any ERISA Affiliate which is or would be materially adverse to the business,
property or assets, condition (financial or otherwise) or operations of the Company and its
Subsidiaries taken as a whole. Neither the Company, any Subsidiary nor any ERISA Affiliate has
incurred or presently expects to incur any withdrawal liability under Title IV of ERISA with
respect to any Multiemployer Plan which is or would be materially adverse to the business, property
or assets, condition (financial or otherwise) or

 

40

 

operations of the Company and its Subsidiaries taken as a whole. The execution and delivery
of this Agreement and the issuance and sale of the Notes will be exempt from or will not involve
any transaction which is subject to the prohibitions of section 406 of ERISA and will not involve
any transaction in connection with which a penalty could be imposed under section 502(i) of ERISA
or a tax could be imposed pursuant to section 4975 of the Code. The representation by the Company
in the next preceding sentence is made in reliance upon and subject to the accuracy of the
representation of each Purchaser in paragraph 9B as to the source of funds to be used by it to
purchase any Notes.

8K. Governmental Consent. Neither the nature of the Company or of any Subsidiary, nor
any of their respective businesses or Properties, nor any relationship between the Company or any
Subsidiary and any other Person, nor any circumstance in connection with the offering, issuance,
sale or delivery of the Notes is such as to require any authorization, consent, approval, exemption
or any action by or notice to or filing with any court or administrative or governmental or
regulatory body (other than routine filings after the Closing Day for any Notes with the Securities
and Exchange Commission and/or state Blue Sky authorities) in connection with the execution and
delivery of this Agreement and the other Note Documents, the offering, issuance, sale or delivery
of the Notes or fulfillment of or compliance with the terms and provisions hereof or of the Notes
or the other Note Documents.

8L. Compliance with Laws. The Company and its Subsidiaries and all of their respective
Properties and facilities have complied at all times and in all respects with all federal, state,
local and regional statutes, laws, ordinances and judicial or administrative orders, judgments,
rulings and regulations, including those relating to protection of the environment except, in any
such case, where failure to comply would not reasonably be expected to have a Material Adverse
Effect.

8M. Environmental Compliance. The Company and its Subsidiaries and all of their
respective Properties and facilities have complied at all times and in all respects with all
federal, state, local and regional statutes, laws, ordinances and judicial or administrative
orders, judgments, rulings and regulations relating to protection of the environment except, in any
such case, where failure to comply would not reasonably be expected to have a Material Adverse
Effect.

8N. Foreign Assets Control Regulations, Etc.

(i) Neither the sale of the Notes by the Company hereunder nor its use of the
proceeds thereof will violate the Trading with the Enemy Act, as amended, or any of the
foreign assets control regulations of the United States Treasury Department (31 CFR,
Subtitle B, Chapter V, as amended) or any enabling legislation or executive order relating
thereto.

(ii) Neither the Company nor any Subsidiary (a) is a Person described or
designated in the Specially Designated Nationals and Blocked Persons List of the Office of
Foreign Assets Control or in Section 1 of the Anti-Terrorism Order or (b) engages in
any dealings or transactions with any such Person. The Company and its Subsidiaries
are in compliance, in all material respects, with the USA Patriot Act.

 

41

 

(iii) No part of the proceeds from the sale of the Notes hereunder will be
used, directly or indirectly, for any payments to any governmental official or employee,
political party, official of a political party, candidate for political office, or anyone
else acting in an official capacity, in order to obtain, retain or direct business or obtain
any improper advantage, in violation of the United States Foreign Corrupt Practices Act of
1977, as amended, assuming in all cases that such Act applies to the Company.

8O. Utility Company Status. Neither the Company nor any Subsidiary is subject to, or is not
exempt from, regulation under PUHCA.

8P. Investment Company Status. Neither the Company nor any Subsidiary is an “investment
company” or a company “controlled” by an “investment company” within the meaning of the Investment
Company Act of 1940, as amended, or an “investment adviser” within the meaning of the Investment
Advisers Act of 1940, as amended.

8Q. Disclosure. Neither this Agreement nor any other document, certificate or statement
furnished to any Purchaser by or on behalf of the Company in connection herewith contains any
untrue statement of a material fact or omits to state a material fact necessary in order to make
the statements contained herein and therein not misleading. There is no fact peculiar to the
Company or any of its Subsidiaries which materially adversely affects or in the future may (so far
as the Company can now foresee) materially adversely affect the business, property or assets,
condition (financial or otherwise) or operations of the Company or any of its Subsidiaries and
which has not been set forth in this Agreement. The projections contained in the Initial
Engineering Report are reasonable based on the assumptions contained therein and the best
information available to the Company. The information furnished by the Company and its
Subsidiaries for use in connection with, and as a basis for, any Engineering Report was and is
complete and accurate in all material respects.

8R. Solvency. Each of the Company and each Guarantor is Solvent, both before and after
giving effect to this Agreement, the other Note Documents and the transactions contemplated hereby
and thereby and the issuance of the Notes.

8S. Hostile Tender Offers. None of the proceeds of the sale of any Notes will be used to
finance a Hostile Tender Offer.

8T. Rule 144A. The Notes are not of the same class as securities of the Company, if any,
listed on a national securities exchange, registered under Section 6 of the Exchange Act or quoted
in a U.S. automated inter-dealer quotation system.

8U. Delivery of Bank Agreement. The Company has delivered to each Purchaser prior to the
date hereof a true, correct and complete copy of the Bank Agreement, including all amendments and
waivers of any provision thereof.

 

42

 

9. REPRESENTATIONS OF THE PURCHASERS.

Each Purchaser represents as follows:

9A. Nature of Purchase. Such Purchaser is not acquiring the Notes purchased by it hereunder
with a view to or for sale in connection with any distribution thereof within the meaning of the
Securities Act; provided that the disposition of such Purchaser’s property shall at all
times be and remain within its control. Such Purchaser is an “accredited investor” within the
meaning of Regulation D under the Securities Act. Such Purchaser understands that the Notes
purchased by it hereunder have not been registered under the Securities Act and may be resold only
if registered pursuant to the provisions of the Securities Act or sold under circumstances in which
an exemption from registration is available.

9B. Source of Funds. At least one of the following statements is an accurate
representation as to each source of funds (the “Source”) to be used by such Purchaser to pay the
purchase price of the Notes to be purchased by such Purchaser hereunder:

(i) the Source is an “insurance company general account” (as the term is
defined in the United States Department of Labor’s Prohibited Transaction Exemption (“PTE”)
95-60) in respect of which the reserves and liabilities (as defined by the annual statement
for life insurance companies approved by the NAIC (the “NAIC Annual Statement”)) for the
general account contract(s) held by or on behalf of any employee benefit plan together with
the amount of the reserves and liabilities for the general account contract(s) held by or on
behalf of any other employee benefit plans maintained by the same employer (or affiliate
thereof as defined in PTE 95-60) or by the same employee organization in the general account
do not exceed 10% of the total reserves and liabilities of the general account (exclusive of
separate account liabilities) plus surplus as set forth in the NAIC Annual Statement filed
with such Purchaser’s state of domicile; or

(ii) the Source is a separate account that is maintained solely in connection
with such Purchaser’s fixed contractual obligations under which the amounts payable, or
credited, to any employee benefit plan (or its related trust) that has any interest in such
separate account (or to any participant or beneficiary of such plan (including any
annuitant)) are not affected in any manner by the investment performance of the separate
account; or

(iii) the Source is either (a) an insurance company pooled separate account,
within the meaning of PTE 90-1 or (b) a bank collective investment fund, within the meaning
of the PTE 91-38 and, except as disclosed by such Purchaser to the Company in writing
pursuant to this clause (iii), no employee benefit plan or group of plans maintained by the
same employer or employee organization beneficially owns more than 10% of all assets
allocated to such pooled separate account or collective investment fund; or

 

43

 

(iv) the Source constitutes assets of an “investment fund” (within the meaning
of Part V of PTE 84-14 (the “QPAM Exemption”)) managed by a “qualified
professional asset manager” or “QPAM” (within the meaning of Part V of the QPAM
Exemption), no employee benefit plan’s assets that are included in such investment fund,
when combined with the assets of all other employee benefit plans established or maintained
by the same employer or by an affiliate (within the meaning of Section V(c)(1) of the QPAM
Exemption) of such employer or by the same employee organization and managed by such QPAM,
exceed 20% of the total client assets managed by such QPAM, the conditions of Part I(c) and
(g) of the QPAM Exemption are satisfied, neither the QPAM nor a person controlling or
controlled by the QPAM (applying the definition of “control” in Section V(e) of the QPAM
Exemption) owns a 5% or more interest in the Company, and (a) the identity of such QPAM and
(b) the names of all employee benefit plans whose assets are included in such investment
fund have been disclosed to the Company in writing pursuant to this clause (iv); or

(v) the Source constitutes assets of a “plan(s)” (within the meaning of
Section IV of PTE 96-23 (the “INHAM Exemption”)) managed by an “in-house asset manager” or
“INHAM” (within the meaning of Part IV of the INHAM exemption), the conditions of Part I(a),
(g) and (h) of the INHAM Exemption are satisfied, neither the INHAM nor a person controlling
or controlled by the INHAM (applying the definition of “control” in Section IV(h) of the
INHAM Exemption) owns a 5% or more interest in the Company, and (a) the identity of such
INHAM and (b) the name(s) of the employee benefit plan(s) whose assets constitute the Source
have been disclosed to the Company in writing pursuant to this clause (v); or

(vi) the Source is a governmental plan; or

(vii) the Source is one or more employee benefit plans, or a separate account
or trust fund comprised of one or more employee benefit plans, each of which has been
identified to the Company in writing pursuant to this clause (vii); or

(viii) the Source does not include assets of any employee benefit plan, other
than a plan exempt from the coverage of ERISA.

As used in this paragraph 9B, the terms “employee benefit plan,” “governmental plan,” and “separate
account” shall have the respective meanings assigned to such terms in Section 3 of ERISA.

9C. Independent Investigation. Each Purchaser represents to each other Purchaser that it has
made its own investigation of the condition (financial and otherwise), prospects and affairs of the
Company and its Subsidiaries in connection with its purchase of the Notes purchased by it hereunder
and has made and shall continue to make its own assessment of the creditworthiness of the Company.
No holder of Notes shall have any duty or responsibility to any other holder of Notes, either
initially or on a continuing basis, to make any such investigation or assessment or to provide any
credit or other information with respect thereto. No holder of Notes is acting as agent or in any
other fiduciary capacity on behalf of any other holder of Notes.

 

44

 

10. DEFINITIONS; ACCOUNTING MATTERS. For the purpose of this Agreement, the terms
defined in paragraphs 10A and 10B (or within the text of any other paragraph) shall have the
respective meanings specified therein and all accounting matters shall be subject to determination
as provided in paragraph 10C.

10A. Yield-Maintenance Terms.

“Called Principal” shall mean, with respect to any Fixed Rate Note, the principal of such
Fixed Rate Note that is to be prepaid pursuant to paragraph 4B or 4D or is declared to be
immediately due and payable pursuant to paragraph 7A, as the context requires.

“Designated Spread” shall mean (i) 0.50% in the case of the Series A Notes and (ii) with
respect to any other Series of Fixed Rate Notes, the amount specified in the Supplement with
respect to such Series.

“Discounted Value” shall mean, with respect to the Called Principal of any Fixed Rate Note,
the amount obtained by discounting all Remaining Scheduled Payments with respect to such Called
Principal from their respective scheduled due dates to the Settlement Date with respect to such
Called Principal, in accordance with accepted financial practice and at a discount factor (as
converted to reflect the periodic basis on which interest on such Fixed Rate Note is payable, if
payable other than on a semi-annual basis) equal to the Reinvestment Yield with respect to such
Called Principal.

“Reinvestment Yield” shall mean, with respect to the Called Principal of any Fixed Rate Note,
the Designated Spread over the yield to maturity implied by (i) the yields reported as of 10:00
a.m. (New York City local time) on the Business Day next preceding the Settlement Date with respect
to such Called Principal for actively traded U.S. Treasury securities having a maturity equal to
the Remaining Average Life of such Called Principal as of such Settlement Date on the Treasury
Yield Monitor page of Standard & Poor’s MMS — Treasury Market Insight (or, if Standard & Poor’s
shall cease to report such yields in MMS — Treasury Market Insight or shall cease to be Prudential
Capital Group’s customary source of information for calculating yield-maintenance amounts on
privately placed notes, then such source as is then Prudential Capital Group’s customary source of
such information), or if such yields shall not be reported as of such time or the yields reported
as of such time shall not be ascertainable, (ii) the Treasury Constant Maturity Series yields
reported, for the latest day for which such yields shall have been so reported as of the Business
Day next preceding the Settlement Date with respect to such Called Principal, in Federal Reserve
Statistical Release H.15(519) (or any comparable successor publication) for actively traded U.S.
Treasury securities having a constant maturity equal to the Remaining Average Life of such Called
Principal as of such Settlement Date. Such implied yield shall be determined, if necessary, by (a)
converting U.S. Treasury bill quotations to bond equivalent yields in accordance with accepted
financial practice and (b) interpolating linearly between yields reported for various maturities.
The Reinvestment Yield shall be rounded to that number of decimal places as appears in the coupon
of the applicable Fixed Rate Note.

 

45

 

“Remaining Average Life” shall mean, with respect to the Called Principal of any Fixed Rate
Note, the number of years (calculated to the nearest one-twelfth year) obtained by dividing (i)
such Called Principal into (ii) the sum of the products obtained by multiplying (a) each Remaining
Scheduled Payment of such Called Principal (but not of interest thereon) by (b) the number of years
(calculated to the nearest one-twelfth year) which will elapse between the Settlement Date with
respect to such Called Principal and the scheduled due date of such Remaining Scheduled Payment.

“Remaining Scheduled Payments” shall mean, with respect to the Called Principal of any Fixed
Rate Note, all payments of such Called Principal and interest thereon that would be due on or after
the Settlement Date with respect to such Called Principal if no payment of such Called Principal
were made prior to its scheduled due date.

“Settlement Date” shall mean, with respect to the Called Principal of any Fixed Rate Note, the
date on which such Called Principal is to be prepaid pursuant to paragraph 4B or 4D or is declared
to be immediately due and payable pursuant to paragraph 7A, as the context requires.

“Yield-Maintenance Amount” shall mean, with respect to any Series of Fixed Rate Note, an
amount equal to the excess, if any, of the Discounted Value of the Called Principal of such Fixed
Rate Note over the sum of (i) such Called Principal plus (ii) interest accrued thereon as of
(including interest due on) the Settlement Date with respect to such Called Principal. The
Yield-Maintenance Amount shall in no event be less than zero.

10B. Other Terms.

“Additional Note” shall have the meaning specified in paragraph 2A(2).

“Additional Purchasers” shall mean the purchasers of any Additional Notes identified on
Schedule A to the Supplement with respect thereto.

“Adjusted PV10” shall mean, at any time, the discounted future net revenue from proved U.S.
Oil and Gas Properties of the Company and its Subsidiaries at such time, as reflected in the most
recent determination thereof certified by a Responsible Officer and delivered by the Company as
contemplated by clause (xxvii) of paragraph 3A or clause (v) of paragraph 5A, as applicable, which
determination shall be based on the Engineering Report delivered by the Company together with such
certification, pursuant to clause (xxvii) of paragraph 3A or clause (v) of paragraph 5A, as
applicable, minus the amounts sold or transferred pursuant to clause (v) of paragraph 6G subsequent
to the date of the most recent Engineering Report; provided that not less than 70% of such
discounted future net revenue shall be from PDP Reserves and PDNP Reserves.

“Affiliate” shall mean any Person directly or indirectly controlling, controlled by or under
direct or indirect common control with, the Company, except a Subsidiary. A Person shall be deemed
to control another Person if such Person possesses, directly or indirectly, the power to direct or
cause the direction of the management and policies of such other Person, whether through the
ownership of voting securities, by contract or otherwise.

 

46

 

“Anti-Terrorism Order” shall mean Executive Order No. 13224 of September 24, 2001, Blocking
Property and Prohibiting Transactions with Persons Who Commit, Threaten to Commit or Support
Terrorism, 66 U.S. Fed. Reg. 49, 079 (2001), as amended.

“Applicable Margin” shall mean, with respect to any Series of Floating Rate Notes, the
applicable percentage set forth in the form of Note attached as Exhibit 1 to the Schedule for such
Series.

“Approved Counterparties” shall mean (i) any Bank or any Bank Affiliate and (ii) any other
Person whose long-term senior unsecured debt rating at the time of entry into the applicable Swap
is BBB+/Baa1 by S&P or Moody’s (or their equivalent) or higher.

“Authorized Officer” shall mean the chief executive officer, the chief financial officer or
any vice president of the Company designated as an “Authorized Officer” of the Company for the
purpose of this Agreement in an Officer’s Certificate executed by the Company’s chief executive
officer or chief financial officer and delivered to the Purchasers. Any action taken under this
Agreement on behalf of the Company by any individual who on or after the date of this Agreement
shall have been an Authorized Officer of the Company and whom the Series A Purchasers in good faith
believes to be an Authorized Officer of the Company at the time of such action shall be binding on
the Company even though such individual shall have ceased to be an Authorized Officer of the
Company, and any action taken under this Agreement on behalf of the Series A Purchasers by any
individual who on or after the date of this Agreement shall have been an Authorized Officer of the
Series A Purchasers and whom the Company in good faith believes to be an Authorized Officer of the
Series A Purchasers at the time of such action shall be binding on the Series A Purchasers even
though such individual shall have ceased to be an Authorized Officer of the Series A Purchasers.

“Bank Affiliate” shall mean any Person directly or indirectly controlling, controlled by or
under direct or indirect common control with a Bank. A Person shall be deemed to control another
Person if such Person possesses, directly or indirectly, the power to direct or cause the direction
of the management and policies of such other Person, whether through the ownership of voting
securities, by contract or otherwise.

“Bank Agent” shall mean Capital One, National Association, as administrative agent under the
Bank Agreement, and any successor administrative agent in such capacity.

“Bank Agreement” shall mean the Amended and Restated Loan Agreement dated as of June 7, 2006,
by and among the Company, the Bank Agent, Capital One, National Association, and Union Bank of
California, N.A., as amended, restated, supplemented or otherwise modified or refinanced from time
to time so long as the lenders thereunder (or the agent bank or other representative thereof) are
parties to the Intercreditor Agreement.

“Bankruptcy Law” shall have the meaning specified in clause (vii) of paragraph 7A.

“Banks” shall mean the lenders from time to time under the Bank Agreement.

 

47

 

“Borrowing Base” shall mean the amount that is available to be advanced to the Company under a
committed, revolving credit facility (without regard to outstanding advances or letters of credit
thereunder).

“Breakage Cost Obligation” shall have the meaning specified in paragraph 2C(2).

“Business Day” shall mean any day other than (i) a Saturday or a Sunday and (ii) a day on
which commercial banks in New York City are required or authorized to be closed.

“Capital Lease” shall mean shall mean a lease with respect to which the lessee is required
concurrently to recognize the acquisition of an asset and the incurrence of a liability in
accordance with GAAP.

“Capitalized Lease Obligation” shall mean any rental obligation which, under GAAP, is or will
be required to be capitalized on the books of the Company or any Subsidiary, taken at the amount
thereof accounted for as indebtedness (net of interest expenses) in accordance with such
principles.

“Cash Receipts” shall mean all cash or cash equivalents received by or on behalf of the
Company and its Subsidiaries with respect to any of the following: (i) sales of Hydrocarbons from
the U.S. Oil and Gas Properties, (ii) cash representing operating revenue earned or to be earned by
the Company and its Subsidiaries, (iii) insurance proceeds, (iv) any proceeds from Swaps and (v)
any other cash or cash equivalents from whatever source.

“Change in Control” shall mean (a) any Person or group (as defined in Section 13(d)(3) of the
Exchange Act), other than existing management of the Company as of the Series A Closing Date, shall
become the beneficial owner of more than 33% of the total voting power of the capital stock of the
Company then outstanding or (b) a majority of the members of the Board of Directors of the Company
shall cease to be Continuing Directors. As used herein, the term “Continuing Directors” of a Person
means any member of such Person’s Board of Directors who: (x) was a member of such Person’s Board
of Directors on the Series A Closing Date; or (y) was nominated for election or elected with the
approval of a majority of the Continuing Directors who were then members of such Person’s Board of
Directors (but excluding any such individual whose initial assumption of office occurs as a result
of either an actual or threatened election contest or other actual or threatened solicitation of
proxies or consents by or on behalf of a Person other than the Continuing Directors).

“Change in Management” shall mean that either Ken Kenworthy, Jr. or Ken Kenworthy, Sr. shall
cease to continue in the active, full-time employment of the Company as Chief Executive Officer and
President or as Chief Financial Officer and Executive Vice President, respectively;
provided, that the cessation of active employment of one such officer due to death or
disability or the retirement of Ken Kenworthy, Sr. (as Chief Financial Officer and Executive Vice
President) shall not constitute a “Change in Management” so long as the Company hires or promotes a
replacement officer with experience and qualifications reasonably
acceptable to the Required Holders within four months after the former officer’s cessation of
activity.

 

48

 

“Closing Day” shall mean, with respect to the Series A Notes, the Series A Closing and, with
respect to any Additional Note, the Business Day specified for the closing of the purchase and sale
of such Additional Note in the Supplement related thereto.

“Code” shall mean the Internal Revenue Code of 1986, as amended.

“Collateral Agency Agreement” shall mean the Collateral Agency Agreement, dated as of the date
hereof, by and among the Collateral Agent and the Purchasers, and acknowledged by the Company, in
substantially the form of Exhibit E attached hereto, as amended, restated, supplemented or
otherwise modified from time to time.

“Collateral Agent” shall mean The Bank of New York Trust Company, N.A., as collateral agent
under the Collateral Agency Agreement and any successor or replacement collateral agent thereunder.

“Consolidated” refers to the consolidation of any Person, in accordance with GAAP, with its
properly consolidated Subsidiaries. References herein to a Person’s Consolidated financial
statements, financial position, financial condition, liabilities, etc. refer to the consolidated
financial statements, financial position, financial condition, liabilities, etc. of such Person and
its properly consolidated Subsidiaries.

“Consolidated Tangible Net Worth” shall mean, as at any time of determination thereof, the
Consolidated stockholders’ or shareholders’ equity of the Company and its Subsidiaries,
less (i) the book value of all Intangibles, (ii) any net gains or losses attributed to
cumulative translation adjustments, (iii) Minority Interests and (iv) Indebtedness of the Company
or its Subsidiaries arising from Guarantees of Indebtedness of third parties.

“Control Event” shall mean:

(i) the execution by the Company or any of its Subsidiaries or Affiliates of
any agreement or letter of intent with respect to any proposed transaction or event or
series of transactions or events which, individually or in the aggregate, may reasonably be
expected to result in a Change in Control,

(ii) the execution of any written agreement which, when fully performed by the
parties thereto, would result in a Change in Control, or

(iii) the making of any written offer by any person (as such term is used in
section 13(d) and section 14(d)(2) of the Exchange Act as in effect on the date of the
Closing) or related persons constituting a group (as such term is used in Rule 13d-5 under
the Exchange Act as in effect on the date hereof) to the holders of the common Equity
Interests of the Company, which offer, if accepted by the requisite number of holders, would
result in a Change in Control.

 

49

 

“Default Rate” shall mean, for any Note at any time upon the occurrence of an Event of Default
and until such Event of Default has been cured or waived in writing, a rate of interest per annum
from time to time equal to the lesser of (i) the maximum rate permitted by applicable law and (ii)
(a) with respect to the Fixed Rate Notes, the greater of (I) 2.0% over the rate of interest in
effect immediately prior to such Event of Default and (II) 2.0% over the Prime Rate and (b) with
respect to either a Prime Loan or a LIBOR Loan under a Floating Rate Note, 2.0% over the rate of
interest in effect immediately prior to such Event of Default.

“Deposit Account Control Agreement” shall mean that certain Subordinated Deposit Account
Control Agreement executed by the Company, the Collateral Agent and Capital One, National
Association, as depositary, in substantially the form of Exhibit F attached hereto.

“Diamond” shall mean Diamond Blue Drilling Co., an Oklahoma corporation and wholly-owned
Subsidiary of the Company.

“Diamond Note” shall mean the Amended and Restated Revolving Note, dated June 7, 2006, in the
face principal amount of $50,000,000 issued by Diamond and payable to the order of the Company.

“Direction Letters” shall mean letters in substantially the form of Exhibit G attached
hereto.

“Endeavor” shall mean Endeavor Pipeline Inc., an Oklahoma corporation, and a wholly-owned
Subsidiary of the Company.

“EBITDA” shall mean, for any Person for any period, the sum of (i) Net Income of such Person
for such period, plus (ii) the following, to the extent, and only to the extent, deducted
in computing such Net Income: Interest Expense, taxes, depreciation, depletion, amortization,
intangible drilling costs, exploration expenses and non-cash expenses deducted from net income
under FAS APB Opinion No. 25, SFAS No. 123 or SFAS No. 143, all determined on a Consolidated basis
in accordance with GAAP.

“Engineer” shall mean (i) with respect to the Initial Engineering Report and Engineering
Reports delivered pursuant to clause (v)(a) of paragraph 5A hereof, MHA Petroleum Consultants, Inc.
and Sproule Associates Inc. or such other independent petroleum engineers of nationally recognized
standing and experienced in the evaluation of Hydrocarbon Interests who may be selected from time
to time by the Company, and approved by the Required Holder(s), to prepare and sign one or more of
the Engineering Reports and (ii) with respect to any other Engineering Report to be delivered
pursuant to clause (v) of paragraph 5A, any other provision of this Agreement or the Guaranty
Agreement or the Pledge Agreement, any other petroleum engineer (who may be an employee of the
Company or of a Subsidiary or Affiliate thereof) experienced in the evaluation of Hydrocarbon
Interests who may be selected from time to time by the Company to prepare and sign one or more
Engineering Reports.

 

50

 

“Engineering Report” shall mean a report, prepared and signed by an Engineer, that evaluates
all U.S. Oil and Gas Properties. Except as otherwise expressly required by this Agreement,
Engineering Reports shall be prepared in accordance with established criteria
generally accepted in the oil and gas industry and standards customarily used by independent
petroleum engineers in making any determinations or appraisals of proven, probable and possible
Hydrocarbon reserves and of the discounted present value of future revenues (the rate of discount
for which shall be 10% on an annual basis) derived from the production of such reserves, including
assumptions, estimates and projections as to (a) production expenses, (b) prices (which shall be
determined by the Engineer from time to time utilizing (i) in the case of oil, the lesser of the
applicable strip prices as quoted on the New York Mercantile Exchange as of the market close on the
date of the applicable Engineering Report and $50 per barrel, and (ii) in the case of natural gas,
$6.50 per MCF, (c) availability of reserves and (d) rate of production, provided that all such
assumptions, estimates and projections are fully disclosed in such Engineering Reports. Each
Engineering Report shall be accompanied by a determination of the discounted present value of the
market value of oil and natural gas commodity Swaps (the rate of discount for which shall be 10% on
an annual basis), valued at the difference between the hedged price for such volumes and prices
utilized for the Engineering Report, certified by a Responsible Officer of the Company, which shall
be considered part of the Engineering Report and incorporated into the determination of Adjusted
PV10.

“Equity Interests” shall mean shares of capital stock, partnership interests, membership
interests in a limited liability company, beneficial interests in a trust or other equity ownership
interests in a Person, and any warrants, options or other rights entitling the holder thereof to
purchase or acquire any such Equity Interest.

“ERISA” shall mean the Employee Retirement Income Security Act of 1974, as amended.

“ERISA Affiliate” shall mean any Person which is a member of the same controlled group of
Persons as the Company within the meaning of section 414(b) of the Code, or any trade or business
which is under common control with the Company within the meaning of section 414(c) of the Code.

“Event of Default” shall mean any of the events specified in paragraph 7A, provided that there
has been satisfied any requirement in connection with such event for the giving of notice, or the
lapse of time, or the happening of any further condition, event or act, and “Default” shall mean
any of such events, whether or not any such requirement has been satisfied.

“Exchange Act” shall mean the Securities Exchange Act of 1934, as amended.

“Fair Market Value” shall mean, at any time with respect to any property of any kind or
character, the sale value of such property that would be realized in an arm’s-length sale at such
time between an informed and willing buyer and an informed and willing seller, under no compulsion
to buy or sell, respectively.

“Fixed Rate Notes” shall have the meaning specified in paragraph 2A.

“Floating Rate Notes” shall have the meaning specified in paragraph 2A.

 

51

 

“GAAP” shall have the meaning specified in paragraph 10C.

“Governmental Authority” shall mean the government of the United States of America, any other
nation or any political subdivision thereof, whether state or local, and any agency, authority,
instrumentality, regulatory body, court, board, bureau, central bank or other entity exercising
executive, legislative, judicial, taxing, regulatory or administrative powers or functions of or
pertaining to government.

“Guarantee” shall mean, with respect to any Person, any direct or indirect liability,
contingent or otherwise, of such Person with respect to any indebtedness, lease, dividend or other
obligation of another, including, without limitation, any such obligation directly or indirectly
guaranteed, endorsed (otherwise than for collection or deposit in the ordinary course of business)
or discounted or sold with recourse by such Person, or in respect of which such Person is otherwise
directly or indirectly liable, including, without limitation, any such obligation in effect
guaranteed by such Person through any agreement (contingent or otherwise) to purchase, repurchase
or otherwise acquire such obligation or any security therefor, or to provide funds for the payment
or discharge of such obligation (whether in the form of loans, advances, stock purchases, capital
contributions or otherwise), or to maintain the solvency or any balance sheet or other financial
condition of the obligor of such obligation, or to make payment for any products, materials or
supplies or for any transportation or service, regardless of the non-delivery or non-furnishing
thereof, in any such case if the purpose or intent of such agreement is to provide assurance that
such obligation will be paid or discharged, or that any agreements relating thereto will be
complied with, or that the holders of such obligation will be protected against loss in respect
thereof. The amount of any Guarantee shall be equal to the outstanding principal amount of the
obligation guaranteed or such lesser amount to which the maximum exposure of the guarantor shall
have been specifically limited.

“Guarantor” shall mean (i) Endeavor, (ii) Diamond and (iii) each other Person from time to
time that shall have executed and delivered a guaranty agreement as required by paragraph 5D or a
supplement to the Guaranty Agreement as required by paragraph 5O(iv).

“Guaranty Agreements” shall mean (i) the Subordinated Guaranty Agreement, in substantially the
form of Exhibit H attached hereto, executed by Endeavor and Diamond, as amended, restated,
supplemented or otherwise modified from time to time, and (ii) all guaranty agreements entered into
after the date of the Series A Closing including, without limitation, any guaranty agreement
required by paragraph 5D.

“Hazardous Material” shall mean (i) any material or substance defined as or included in the
definition of “hazardous substances,” “hazardous wastes,” “hazardous material,” “toxic substances”
or any other formulations intended to define, list or classify substances by reason of their
deleterious properties, (ii) any oil, petroleum or petroleum derived substance, (iii) any flammable
substances or explosives, (iv) any radioactive materials, (v) asbestos in any form, (vi) electrical
equipment that contains any oil or dielectric fluid containing levels of polychlorinated biphenyls
in excess of 50 parts per million, (vii) pesticides or (viii) any other chemical, material or
substance, exposure to which is prohibited, limited or regulated by any
governmental agency or authority or which may or could pose a hazard to the health and safety
of persons in the vicinity thereof.

 

52

 

“Hedge Treasury Note(s)” shall mean, with respect to any Additional Note, the United States
Treasury Note or Notes whose duration (as determined by the Series A Purchasers) most closely
matches the duration of such Additional Note.

“Hostile Tender Offer” shall mean, with respect to the use of proceeds of any Note, any offer
to purchase, or any purchase of, shares of capital stock of any corporation or Equity Interests in
any other entity, or securities convertible into or representing the beneficial ownership of, or
rights to acquire, any such shares or Equity Interests, if such shares, Equity Interests,
securities or rights are of a class which is publicly traded on any securities exchange or in any
over-the-counter market, other than purchases of such shares, Equity Interests, securities or
rights representing less than 5% of the Equity Interests or beneficial ownership of such
corporation or other entity for portfolio investment purposes, and such offer or purchase has not
been duly approved by the board of directors of such corporation or the equivalent governing body
of such other entity prior to the date on which the Company makes the Request for Purchase of such
Note.

“Hydrocarbon” shall mean oil, gas and other liquid or gaseous hydrocarbons, including, but not
limited to, all liquefiable hydrocarbons and other products which may be extracted from gas and gas
condensate by the processing thereof in a gas processing plant.

“Hydrocarbon Interests” shall mean leasehold and other rights, titles, interests and estates
now or hereafter acquired in Hydrocarbons in or under oil, gas and other mineral leases, mineral
fee interests, and overriding royalty, production payments, net profits and royalty interests and
any other interests in Hydrocarbons in place.

“including” shall mean, unless the context clearly requires otherwise, “including without
limitation”.

“Indebtedness” shall mean, with respect to any Person and without duplication,

(i) its liabilities for borrowed money;

(ii) its liabilities for the deferred purchase price of property acquired by such Person
(excluding accounts payable arising in the ordinary course of business but including all
liabilities created or arising under any conditional sale or other title retention agreement with
respect to any such property);

(iii) (a) all liabilities appearing on its balance sheet in accordance with GAAP in respect of
Capital Leases and (b) all liabilities which would appear on its balance sheet in accordance with
GAAP in respect of Synthetic Leases assuming such Synthetic Leases were accounted for as Capital
Leases;

 

53

 

(iv) all liabilities for borrowed money secured by any Lien with respect to any property owned
by such Person (whether or not it has assumed or otherwise become liable for such liabilities);

(v) all its liabilities in respect of letters of credit or instruments serving a similar
function issued or accepted for its account by banks and other financial institutions (whether or
not representing obligations for borrowed money);

(vi) the aggregate Swap Termination Value of all Swaps of such Person; and

(vii) any Guarantee of such Person with respect to liabilities of a type described in any of
clauses (i) through (vi) hereof.

Indebtedness of any Person shall include all obligations of such Person of the character
described in clauses (i) through (vii) to the extent such Person remains legally liable in respect
thereof notwithstanding that any such obligation is deemed to be extinguished under GAAP.

“INHAM Exemption” shall have the meaning specified in paragraph 9B.

“Initial Engineering Report” shall have the meaning specified in paragraph 3A(xxvii).

“Intangibles” shall mean all items classified as intangibles in accordance with GAAP
including, without duplication, all Material Rights, Intellectual Property and operating
agreements, treasury stock, deferred or capitalized research and development costs, goodwill
(including any amount, however designated, representing the cost of acquisition of business and
investments in excess of the book value thereof), unamortized debt discount and expense, any
write-up of asset value after December 31, 2006 and any other amounts reflected in contra-equity
accounts, and any other assets treated as intangible assets under GAAP.

“Intellectual Property” shall mean all patents, trademarks, service marks, trade names,
copyrights, brand names, mechanical or technical processes and paradigms, know-how, and similar
intellectual property and applications, licenses and similar rights in respect of the same.

“Intercreditor Agreement” shall mean that certain Intercreditor Agreement between the
Collateral Agent, the Purchasers and the Banks, the Bank Agent, the Company, in substantially the
form of Exhibit I attached hereto, as amended, restated, supplemented or otherwise modified
from time to time.

“Interest Expense” shall mean, for any period, the sum (without duplication) of (i) all
interest, prepayment charges and fees incurred (whether paid or accrued) in respect of any Total
Debt (including imputed interest in respect of Capitalized Lease Obligations and Off Balance Sheet
Liabilities and, net costs of Swaps and all fees, commissions and discounts owed with respect to
letters of credit and bankers’ acceptance financing) deducted in determining Net Income for such
period, together with all interest capitalized or deferred during such period and
not deducted in determining Net Income for such period, plus (ii) all debt discount
and expense amortized or required to be amortized in the determination of Net Income for such
period plus (iii) dividends paid or accrued in respect of Qualified Redeemable Preferred
Stock.

 

54

 

“Interest Period” shall mean, (i) as to any LIBOR Loan, the period commencing on the date of
such LIBOR Loan or on the last day of the immediately preceding Interest Period applicable thereto,
as the case may be, and ending on the numerically corresponding day (or, if there is no numerically
corresponding day, on the last day) in the calendar month that is one, three or six months
thereafter, in each case as the Company may specify or be deemed to specify, and (ii) as to any
Prime Loan, the period commencing on the date of such Prime Loan or on the last day of the
immediately preceding Interest Period applicable thereto, as the case may be, and ending on the
earlier of (a) the last day of March, June, September or December, as applicable, next succeeding
such commencement date and (b) the date, if any, that such Prime Loan is converted to a LIBOR Loan
or LIBOR Loans; provided that (I) if any Interest Period pertaining to a LIBOR Loan would
end on a day other than a Business Day, such Interest Period shall be extended to the next
succeeding Business Day unless such next succeeding Business Day would fall in the next calendar
month, in which case such Interest Period shall end on the next preceding Business Day, and (II) if
any Interest Period pertaining to a Prime Loan would end on a day other than a Business Day, such
Interest Period shall be extended to the next succeeding Business Day. Interest shall accrue from
and including the first day of an Interest Period to but excluding the earlier of (A) the last day
of such Interest Period and (B) the day on which the applicable Loan is repaid or prepaid in full.

“Investment” shall have the meaning specified in paragraph 6E.

“Letters-in-Lieu” shall mean letters-in-lieu, in substantially the form of Exhibit J
attached hereto.

“LIBO Rate” shall mean for each Interest Period for any Loan: (i) the interest rate per annum
for deposits in U.S. dollars with a maturity most nearly comparable to the applicable Interest
Period which appears on Telerate Page 3750 as of 11:00 A.M. (London time), two Business Days prior
to the commencement of such Interest Period, or (ii) if such rate ceases to be reported in
accordance with the above definition on Telerate Page 3750, the arithmetic mean of the rates per
annum at which deposits in U.S. dollars are offered by the principal London offices of the
Reference Banks at approximately 11:00 A.M. (London time), on the day that is two Business Days
before the first day of such Interest Period to prime banks in the London interbank market for a
period equal to such Interest Period, commencing on the first day of such Interest Period, and in
an amount comparable to such Loan. This arithmetic mean shall be determined on the basis of the
quotations of the applicable rate requested of each of the Reference Banks by, and furnished to,
the Purchasers; provided that if fewer than two quotations are provided as requested, the
rate per annum shall equal the arithmetic mean of the rates quoted by major banks in New York City,
selected by the Purchasers, at approximately 11:00 A.M. (New York City time) on the first day of
the Interest Period for loans in U.S. dollars to leading European banks for a period equal to such
Interest Period, commencing on the first day of such Interest Period, and in an amount comparable
to such Loan.

 

55

 

“LIBOR Loan” shall mean an amount outstanding from time to time under any Floating Rate Note
that bears interest at a rate determined with reference to the LIBO Rate.

“Lien” shall mean any mortgage, pledge, priority, security interest, encumbrance, minimum or
compensating deposit arrangement, lien (statutory or otherwise) or charge of any kind (including
any agreement to give any of the foregoing, any production payment or the like with respect to any
of the Oil and Gas Properties, any conditional sale or other title retention agreement, any lease
in the nature thereof (including Capital Leases), and the filing of or agreement to give any
financing statement under the Uniform Commercial Code of any jurisdiction) or any other type of
preferential arrangement for the purpose, or having the effect, of protecting a creditor against
loss or securing the payment or performance of an obligation.

“Loan” shall mean a LIBOR Loan or a Prime Loan.

“Loan Type” shall mean, as to any Loan, its character as a LIBOR Loan or a Prime Loan.

“Lockbox Account” shall have the meaning specified in paragraph 5N.

“Material Adverse Effect” shall mean (i) a material adverse effect on the business, assets,
liabilities, operations, prospects or condition (financial or otherwise), of the Company and its
Subsidiaries, taken as a whole, (ii) material impairment of the Company’s or any Subsidiary’s
ability to perform any of its obligations under this Agreement, any Note or any of the other Note
Documents or (iii) material impairment of the validity or enforceability of the rights of, or the
benefits available to, the Collateral Agent or any holder of any of the Notes under this Agreement,
any Note or any of the other Note Documents.

“Material Rights” shall mean all material franchises, certificates, affiliation agreements,
licenses, approvals, registrations, development and other permits and authorizations, and
easements, rights of way and similar rights from governmental or political subdivisions, regulatory
authorities or other Persons.

“Minority Interests” shall mean any shares of capital stock (or equivalent Equity Interests)
of a Subsidiary (other than directors’ qualifying shares as required by law) that are not owned by
the Company or a Wholly Owned Subsidiary.

“Moody’s” shall mean Moody’s Investors Services, Inc., including the NCO/Moody’s Commercial
Division, or any successor Person.

“Mortgages” shall mean each mortgage, deed of trust or other similar agreement executed by the
Company or any Subsidiary in favor of the Collateral Agent for its benefit and the ratable benefit
of the holders of the Notes, in form and substance reasonably satisfactory to the Collateral Agent
and the Required Holders, as the same may be amended, restated, supplemented or otherwise modified
from time to time.

“Multiemployer Plan” shall mean any Plan which is a “multiemployer plan” (as such term is
defined in section 4001(a)(3) of ERISA).

 

56

 

“NAIC” shall mean the National Association of Insurance Commissioners, or any successor
replacement entity.

“NAIC Annual Statement” shall have the meaning specified in paragraph 9B.

“National Market Listing” shall mean the listing or quotation, as applicable, of securities on
or in the New York Stock Exchange, American Stock Exchange LLC, The NASDAQ Global Market, The
NASDAQ Global Select Market or THE NASDAQ Capital Market or any comparable national securities
exchange or national securities market.

“Net Cash Proceeds” shall mean, as applicable, with respect to any sale or transfer of
Property by the Company or any Subsidiary, cash and cash equivalent proceeds received by or for
such Person’s account, net of (i) reasonable direct costs relating to such sale or transfer, (ii)
sale, use or other transactions taxes paid or payable by the Company or any Subsidiary as a direct
result of such sale or transfer and (iii) payments made by the Company to the Bank Agent or the
Banks pursuant to the Bank Agreement, but only to the extent that such payments result (whether at
the time of such payments or thereafter) in a reduction of the Borrowing Base thereunder.

“Net Income” shall mean, for any period, with respect to the Company on a Consolidated basis
with its Subsidiaries, cumulative net income earned during such period as determined in accordance
with GAAP.

“Note Documents” shall mean, collectively, this Agreement, the Notes, the Security Documents,
the Guaranty Agreements, the Intercreditor Agreement, the Collateral Agency Agreement, each
Supplement and each other agreement, instrument or document executed at any time in connection with
the foregoing documents, as each such Note Document may be amended, restated, supplemented or
otherwise modified from time to time.

“Notes” shall have the meaning specified in paragraph 1.

“Obligations” means (i) the principal, interest, fees, Yield-Maintenance Amount, Breakage Cost
Obligations, charges, expenses, attorneys’ fees and disbursements, indemnities and any other
amounts payable by the Company and its Subsidiaries to the Collateral Agent or the holders of Notes
under the Note Documents and (ii) any amount in respect of any of the foregoing that the Collateral
Agent or any holder of a Note, in its sole discretion, elects to pay or advance on behalf of the
Company after the occurrence and during the continuance of an Event of Default.

“Off Balance Sheet Liabilities” of a Person shall mean (a) any purchase obligation or
liability of such Person or any of its Subsidiaries with respect to receivables sold by such Person
or any of its Subsidiaries, (b) any liability of such Person or any of its Subsidiaries under any
sale and leaseback transactions which do not create a liability on the consolidated balance sheet
of such Person, (c) any liability of such Person or any of its Subsidiaries under any financing
lease or so-called “synthetic” lease transaction, or (d) any obligations of such Person or any of
its Subsidiaries arising with respect to any other transaction which is the functional equivalent
of or takes the place of such Person and its Subsidiaries.

 

57

 

“Officer’s Certificate” shall mean a certificate signed in the name of the Company by an
Authorized Officer of the Company.

“Oil and Gas Properties” shall mean all right, title and interest of the Company and its
Subsidiaries in and to the following: (i) all Hydrocarbon Interests, (ii) the Properties now or
hereafter pooled or unitized with Hydrocarbon Interests, (iii) all presently existing or future
unitization, pooling agreements and declarations of pooled units and the units created thereby
(including without limitation all units created under orders, regulations and rules of any
Governmental Authority) which may affect all or any portion of the Hydrocarbon Interests, (iv) all
operating agreements, contracts and other agreements which relate to any of the Hydrocarbon
Interests or the production, sale, purchase, exchange or processing of Hydrocarbons from or
attributable to such Hydrocarbon Interests, (v) all Hydrocarbons in and under and which may be
produced and saved or attributable to the Hydrocarbon Interests, including all oil in tanks, the
lands covered thereby and all rents, issues, profits, proceeds, products, revenues and other
incomes from or attributable to the Hydrocarbon Interests, (vi) all tenements, hereditaments,
appurtenances and Properties in any manner appertaining, belonging, affixed or incidental to the
Hydrocarbon Interests and (vii) all Properties, rights, titles, interests and estates described or
referred to above, including any and all Property, real or personal, now owned or hereinafter
acquired and situated upon, used, held for use or useful in connection with the operating working
or development of any of such Hydrocarbon Interests or Property (excluding drilling rigs,
automotive equipment or other personal property which may be on such premises for the purpose of
drilling a well or for other similar temporary uses) and including any and all oil wells, gas
wells, injection wells or other wells, buildings, structures, fuel separators, liquid extraction
plants, plant compressors, pumps, pumping units, field gathering systems, tanks and tank batteries,
fixtures, valves, fittings, machinery and parts, engines, boilers, meters, apparatus, equipment,
appliances, tools, implements, cables, wires, towers, casing, tubing and rods, surface leases,
rights-of-way, easements and servitudes together with all additions, substitutions, replacements,
accessions and attachments to any and all of the foregoing.

“Participation Agreement” shall mean that certain Participation Agreement dated December 29,
2003, by and among Penn Virginia Oil & Gas Corporation, the Company, Endeavor and Expedition
Natural Resources Inc., an Oklahoma corporation (a former wholly-owned Subsidiary of the Company,
which merged into the Company on or about July 29, 2005), as amended from time to time.

“PBGC” shall mean the Pension Benefit Guaranty Corporation.

“PDP Reserves” shall mean proved developed producing reserves, as defined in the SPE
Definitions.

“PDNP Reserves” shall mean proved developed nonproducing reserves, as defined in the SPE
Definitions.

“Permitted Investment” shall have the meaning specified in paragraph 6E.

 

58

 

“Person” shall mean and include an individual, a partnership, a joint venture, a corporation,
a trust, an unincorporated organization and a government or any department or agency thereof.

“PIMI” shall have the meaning specified in paragraph 2B.

“Plan” shall mean any employee pension benefit plan (as such term is defined in section 3 of
ERISA) which is or has been established or maintained, or to which contributions are or have been
made, by the Company or any ERISA Affiliate.

“Pledge Agreement” shall mean the Second Lien Security Agreement (Stock), in substantially the
form of Exhibit K attached hereto, executed by the Company in favor of the Collateral
Agent, as amended, restated, supplemented or otherwise modified from time to time.

“Pledgors” shall mean (i) the Company and (ii) each Subsidiary of the Company that has
executed a supplement or joinder instrument by which such Subsidiary has become a party to the
Pledge Agreement.

“Preferred Stock” shall mean any class of capital stock (or similar Equity Interests) of a
Person that is preferred over any other class of capital stock (or similar Equity Interests) of
such Person as to the payment of dividends or similar distributions or the payment of any amount
upon liquidation or dissolution of such Person.

“Prime Loan” shall mean an amount outstanding from time to time under any Floating Rate Note
that bears interest at a rate determined with reference to the Prime Rate.

“Prime Rate” shall mean, with respect to any Prime Loan, a fluctuating rate per annum (based
on a year of 365 or 366 days, as the case may be, and actual days elapsed) equal on any given day
to the rate of interest most recently announced in New York City by JPMorgan Chase Bank, N.A. as
its U.S. dollar prime commercial lending rate (the “Reference Rate”); the Prime Rate shall
automatically fluctuate, without special notice to the Company or any other Person, upward and
downward as and in the amount by which the Reference Rate shall fluctuate. The Reference Rate is
set by JPMorgan Chase Bank, N.A. as a general reference rate of interest, taking into account such
factors as JPMorgan Chase Bank, N.A. may deem appropriate. The Reference Rate is not necessarily
the lowest or best rate actually charged to any customer, and such rate may not correspond with
future increases or decreases in interest rates charged by other lenders or market rates in
general. JPMorgan Chase Bank, N.A. may make various business or other loans at rates of interest
having no relationship to the Reference Rate. Without notice to the Company or any other Person,
the Reference Rate shall change automatically from time to time, as determined by JPMorgan Chase
Bank, N.A.

“Property” shall mean any interest in any kind of property or asset, whether real, personal or
mixed, or tangible or intangible.

“Proposed Prepayment Date” shall have the meaning specified in paragraph 4D.

 

59

 

“Proved Developed Reserves” shall mean proved developed reserves, as defined in the SPE
definitions.

“Proved Reserves” shall mean proved reserves, as defined in the SPE Definitions.

“PUHCA” shall mean the Public Utility Holding Company Act of 2005.

“Purchasers” shall have the meaning specified in the addressee block at the front of this
Agreement.

“PVOG” shall mean Penn Virginia Oil & Gas, L.P., a wholly owned subsidiary of Penn Virginia
Corporation.

“PVOG Production Payment” shall mean the dollar denominated production payment purchased by
PVOG from the Company in the original amount of $2,233,435.76, repayable solely from 75% of the
Company’s share of production revenues from only four (4) certain wells (Bryant #2, Bryant #3,
Richardson #3 and Scott #1), without interest.

“QPAM Exemption” shall have the meaning specified in paragraph 9B.

“Qualified Redeemable Preferred Stock” shall mean, at any time, redeemable preferred stock
issued by the Company (i) for which the total consideration paid to or for the account of the
Company in connection therewith, when added to the total principal amount of all outstanding Notes
issued by the Company, does not exceed the maximum amount permitted by the Bank Agreement, (ii)
that is not redeemable in any part earlier than five (5) years after its issuance date except only
at the voluntary option of the Company and except for mandatory redemption following a change of
ownership or control or management, (iii) that has a stated interest or dividend rate of less than
twelve (12%) percent per annum, (iv) that sets forth covenants that in the judgment of the Required
Holders are no more restrictive on the Company and the Subsidiaries and their respective operations
than the covenants contained in this Agreement, and (v) that is not secured by any Liens. For the
avoidance of doubt, the Series B Cumulative Preferred Stock, $0.001 par value, issued by the
Company constitutes Qualified Redeemable Preferred Stock.

“Qualifying Public Company” shall mean a corporation (i) with Voting Stock that is subject to
a National Market Listing, (ii) that has a senior unsecured debt rating of at least BB+ from S&P
and Ba1 from Moody’s and (iii) that, at the time in question and on a pro forma combined basis with
the Company, has an EBITDA to Interest Expense ratio of at least 2.0 to 1.0 for the 12-month period
ending on the last day of the most recently ended fiscal quarter of the Company.

“Reference Banks” shall mean four major banks in the London interbank market selected by the
Required Holder(s).

“Related Party” shall mean (i) any shareholder of the Company, (ii) any executive officer,
director, agent, or employee of the Company, (iii) all persons to whom such
Persons are related by blood, adoption or marriage and (iv) all Affiliates of the foregoing
Persons.

 

60

 

“Required Holder(s)” shall mean, at any time, the holder or holders of greater than 50% of the
aggregate principal amount of the Notes outstanding at such time.

“Responsible Officer” shall mean the chief executive officer, chief operating officer, chief
financial officer or chief accounting officer of the Company or any other officer of the Company
involved principally in its financial administration or its controllership function.

“S&P” shall mean Standard and Poor’s Ratings Group and its successors.

“SEC” shall mean the Securities and Exchange Commission (or any governmental body or agency
succeeding to the function of the Securities and Exchange Commission).

“Securities Act” shall mean the Securities Act of 1933, as amended.

“Security Agreement” shall mean the Second Lien Security Agreement, in substantially the form
of Exhibit L attached hereto, executed by Endeavor and Diamond in favor of the Collateral
Agent, as amended, restated, supplemented or otherwise modified from time to time.

“Security Documents” shall mean the Pledge Agreement, the Security Agreement, the Mortgages,
the Deposit Account Control Agreement, the Collateral Agency Agreement, the Intercreditor
Agreement, each other agreement, instrument or document executed at any time in connection with any
of the foregoing, and each other agreement, instrument or document executed at any time in
connection with securing the Obligations.

“Series” shall have the meaning specified in paragraph 1.

“Series A Closing” shall have the meaning specified in paragraph 2A(1).

“Series A Notes” shall have the meaning specified in paragraph 1A.

“Solvent” shall mean, with respect to any Person as of the date of any determination, that on
such date (i) the fair value of the property of such Person (both at fair valuation and at present
fair saleable value) is greater than the total amount of liabilities, including, without
limitation, contingent liabilities, of such Person, (ii) the present fair saleable value of the
assets of such Person is not less than the amount that will be required to pay the probable
liability of such Person on its debts as they become absolute and matured, (iii) such Person is
able to realize upon its assets and pay its debts and other liabilities, contingent obligations and
other commitments as they mature in the normal course of business, (iv) such Person does not intend
to, and does not believe that it will, incur debts or liabilities beyond such Person’s ability to
pay as such debts and liabilities mature, and (v) such Person is not engaged in business or a
transaction, and is not about to engage in business or a transaction, for which such Person’s
property would constitute unreasonably small capital after giving due consideration to current and anticipated future capital requirements and current and anticipated future
business conduct and the prevailing practice in the industry in which such Person is engaged. In
computing the amount of contingent liabilities at any time, such liabilities shall be computed at
the amount which, in light of the facts and circumstances existing at such time, represents the
amount that can reasonably be expected to become an actual or matured liability.

 

61

 

“SPE Definitions” shall mean, with respect to any term, the definition thereof adopted by the
Board of Directors, Society for Petroleum Engineers (SPE) Inc., March 2007.

“Subsidiary” shall mean, as to any Person, any corporation, association or other business
entity in which such Person or one or more of its Subsidiaries or such Person and one or more of
its Subsidiaries owns sufficient equity or voting interests to enable it or them (as a group)
ordinarily, in the absence of contingencies, to elect a majority of the directors (or Persons
performing similar functions) of such entity, and any partnership or joint venture if more than a
50% interest in the profits or capital thereof is owned by such Person or one or more of its
Subsidiaries or such Person and one or more of its Subsidiaries (unless such partnership can and
does ordinarily take major business actions without the prior approval of such Person or one or
more of its Subsidiaries). Unless the context otherwise clearly requires, any reference to a
“Subsidiary” is a reference to a Subsidiary of the Company.

“Supplement” shall have the meaning specified in paragraph 2A(2).

“SVO” shall mean the Securities Valuation Office of the National Association of Insurance
Commissioners.

“Swap Termination Value” means, in respect of any one or more Swaps, after taking into account
the effect of any legally enforceable netting agreement relating to such Swaps, (i) for any date on
or after the date such Swaps have been closed out and termination value(s) determined in accordance
therewith, such termination value(s), and (ii) for any date prior to the date referenced in clause
(i), the amounts(s) determined as the mark-to-market values(s) for such Swaps, as determined based
upon one or more mid-market or other readily available quotations provided by any recognized dealer
in such Swaps.

“Swaps” shall mean (i) any and all interest rate swap transactions, basis swap transactions,
basis swaps, credit derivative transactions, forward rate transactions, commodity swaps, commodity
options, forward commodity contracts, equity or equity index swaps or options, bond or bond price
or bond index swaps or options or forward foreign exchange transactions, cap transactions, floor
transactions, currency options, spot contracts or any other similar transactions or any of the
foregoing (including, but without limitation, any options to enter into any of the foregoing), and
(ii) any and all transactions of any kind, and the related confirmations, which are subject to the
terms and conditions of, or governed by, any form of master agreement published by the
International Swaps and Derivatives Association, Inc., or any International Foreign Exchange Master
Agreement.

 

62

 

“Synthetic Lease” means, for any Person, at any time, any lease (including leases that may be
terminated by the lessee at any time) of any property (i) that is accounted for as an
operating lease under GAAP and (ii) in respect of which the lessee retains or obtains
ownership of the property so leased for U.S. federal income tax purposes, other than any such lease
under which such Person is the lessor.

“Total Debt” shall mean the Consolidated Indebtedness of the Company and its Subsidiaries and
the liquidation preference of all Qualified Redeemable Preferred Stock except the Series B
Cumulative Preferred Stock, $0.001 par value, issued by the Company.

“Transfer” shall mean, with respect to any item, the sale, exchange, conveyance, lease,
transfer or other disposition of such item.

“Transferee” shall mean any direct or indirect transferee of all or any part of any Note
purchased by any Purchaser under this Agreement.

“USA Patriot Act” shall mean United States Public Law 107-56, Uniting and Strengthening
America by Providing Appropriate Tools Required to Intercept and Obstruct Terrorism (USA PATRIOT
Act) Act of 2001, as amended from time to time, and the rules and regulations promulgated
thereunder from time to time in effect.

“U.S. Oil and Gas Properties” shall mean Oil and Gas Properties located onshore in the United
States of America.

“Voting Stock” shall mean, with respect to any corporation, any shares of stock of such
corporation whose holders are entitled under ordinary circumstances to vote for the election of
directors of such corporation (irrespective of whether at the time stock of any other class or
classes shall have or might have voting power by reason of the happening of any contingency).

“Wholly Owned Subsidiary” shall mean any Person organized under the laws of any state of the
United States which conducts the major portion of its business in and makes the major portion of
its sales to Persons located in the United States, all of the stock or other equity security of
every class (other than a de minimus number of directors’ qualifying shares) of which is, at the
time as of which any determination is being made, owned by the Company either directly or through
Wholly Owned Subsidiaries, and which has outstanding no options, warrants, rights or other
securities entitling the holder thereof (other than the Company or a Wholly Owned Subsidiary) to
acquire shares of capital stock or other Equity Interests of such Person.

10C. Accounting Principles, Terms and Determinations. All references in this Agreement to
“GAAP” shall be deemed to refer to generally accepted accounting principles in effect in the United
States at the time of application thereof. Unless otherwise specified herein, all accounting terms
used herein shall be interpreted, all determinations with respect to accounting matters hereunder
shall be made, and all unaudited financial statements and certificates and reports as to financial
matters required to be furnished hereunder shall be prepared, in accordance with GAAP applied on a
basis consistent with the most recent audited financial statements delivered pursuant to clause
(ii) of paragraph 5A or, if no such statements have been so delivered, the most recent audited
financial statements referred to in clause (i) of paragraph 8B.

 

63

 

11. MISCELLANEOUS.

11A. Note Payments. The Company agrees that, so long as any Purchaser shall hold any Note, it
will make payments of principal of, interest on, and any Yield-Maintenance Amount or Breakage Cost
Obligations payable with respect to, such Note, which comply with the terms of this Agreement, by
wire transfer of immediately available funds for credit (not later than 12:00 noon, New York City
local time, on the date due) to the account or accounts of such Purchaser, if any, as are specified
in the Purchaser Schedule attached hereto or to the applicable Supplement, or, in the case
of any Purchaser not named in such Purchaser Schedule or in a Supplement or any Purchaser
wishing to change the account specified for it in the Purchaser Schedule or a Supplement,
such account or accounts in the United States as such Purchaser may from time to time designate in
writing, notwithstanding any contrary provision herein or in any Note with respect to the place of
payment. Each Purchaser agrees that, before disposing of any Note, it will make a notation thereon
(or on a schedule attached thereto) of all principal payments previously made thereon and of the
date to which interest thereon has been paid. The Company agrees to afford the benefits of this
paragraph 11A to any Transferee which shall have made the same agreement as the Purchasers have
made in this paragraph 11A. No holder shall be required to present or surrender any Note or make
any notation thereon, except that upon written request of the Company made concurrently with or
reasonably promptly after payment or prepayment in full of any Note, the applicable holder shall
surrender such Note for cancellation, reasonably promptly after any such request, to the Company at
its principal executive office.

11B. Expenses. The Company agrees, whether or not the transactions contemplated hereby
shall be consummated, to pay, and save the Collateral Agent, each Purchaser and any Transferee
harmless against liability for the payment of, all out-of-pocket expenses arising in connection
with such transactions, including:

(i) (a) all stamp and documentary taxes and similar charges, (b) costs of
obtaining a private placement number for the Notes and (c) fees and expenses of brokers,
agents, dealers, investment banks or other intermediaries or placement agents retained by
the Company, if any, in each case as a result of the execution and delivery of this
Agreement and the other Note Documents or the issuance of the Notes;

(ii) document production and duplication charges and the fees and expenses of
any special counsel (including local counsel) engaged by the Collateral Agent, such
Purchaser or such Transferee in connection with (a) this Agreement, the other Note Documents
and the transactions contemplated hereby and thereby and (b) any subsequent proposed waiver,
amendment or modification of, or proposed consent under, this Agreement or any other Note
Document, whether or not such the proposed action shall be effected or granted;

(iii) the costs and expenses, including attorneys’, consultants’ (including
petroleum engineers’) and financial advisory fees, incurred by the Collateral Agent, such
Purchaser or such Transferee in enforcing (or determining whether or how to enforce) any
rights under this Agreement, the Notes or any other Note Document or in responding to any
subpoena or other legal process or informal investigative demand issued in
connection with this Agreement or any other Note Document or the transactions
contemplated hereby or thereby or by reason of the Collateral Agent’s, such Purchaser’s or
such Transferee’s having acquired any Note, including without limitation costs and expenses
incurred in any workout, restructuring or renegotiation proceeding or bankruptcy case; and

 

64

 

(iv) any judgment, liability, claim, order, decree, cost, fee, expense, action
or obligation resulting from the consummation of the transactions contemplated hereby,
including the use of the proceeds of the Notes by the Company.

The Company will promptly pay or reimburse each Purchaser or holder of a Note (upon demand, in
accordance with each such Purchaser’s or holder’s written instructions) for all fees and costs paid
or payable by such Purchaser or holder to the SVO in connection with the initial filing of this
Agreement and all related documents and financial information, and all subsequent annual and
interim filings of documents and financial information related to this Agreement, with the SVO or
any successor organization acceding to the authority thereof.

The obligations of the Company under this paragraph 11B shall survive the transfer of any Note
or portion thereof or interest therein by any Purchaser or Transferee and the payment of any Note.

11C. Consent to Amendments. This Agreement may be amended, and the Company may take any
action herein prohibited, or omit to perform any act herein required to be performed by it, if the
Company shall obtain the written consent to such amendment, action or omission to act, of the
Required Holder(s) except that, (i) with the written consent of the holders of all
Notes of a particular Series, and if an Event of Default shall have occurred and be continuing, of
the holders of all Notes of all Series, at the time outstanding (and not without such written
consents), the Notes of such Series may be amended or the provisions thereof waived to change the
maturity thereof, to change or affect the principal thereof, or to change or affect the time of
payment of, or increase the rate of, interest on or any Yield-Maintenance Amount or Breakage Cost
Obligations payable with respect to the Notes of such Series, (ii) without the written
consent of the holder or holders of all Notes at the time outstanding, no amendment to or waiver of
the provisions of this Agreement shall change or affect the provisions of paragraph 7A or this
paragraph 11C insofar as such provisions relate to proportions of the principal amount of the Notes
of any Series, or the rights of any individual holder of Notes, required with respect to any
declaration of Notes to be due and payable or with respect to any consent, amendment, waiver or
declaration, (iii) with the written consent of the Required Holder(s) (and not without the
written consent of the Required Holder(s)) the provisions of paragraph 2 may be amended or waived
(except insofar as any such amendment or waiver would affect any rights or obligations with respect
to the purchase and sale of Notes which shall have become Additional Notes prior to such amendment
or waiver), and (iv) with the written consent of all of the Purchasers which shall have
become obligated to purchase Additional Notes of any Series (and not without the written consent of
all such Purchasers), any of the provisions of paragraphs 2 and 3 may be amended or waived insofar
as such amendment or waiver would affect only rights or obligations with respect to the purchase
and sale of the Additional Notes of such Series or the terms and provisions of such Additional
Notes. Each holder of any Note at the time or thereafter outstanding shall be
bound by any consent authorized by this paragraph 11C, whether or not such Note shall have
been marked to indicate such consent, but any Notes issued thereafter may bear a notation referring
to any such consent. No course of dealing between the Company and the holder of any Note nor any
delay in exercising any rights hereunder, under any Note or under any other Note Document shall
operate as a waiver of any rights of any holder of any Note. As used herein and in the Notes, the
term “this Agreement” and references thereto shall mean this Agreement as it may from time to time
be amended or supplemented.

 

65

 

11D. Form, Registration, Transfer and Exchange of Notes; Lost Notes. The Notes are
issuable as registered notes without coupons in denominations of at least $100,000, except as may
be necessary to reflect any principal amount not evenly divisible by $100,000. The Company shall
keep at its principal office a register in which the Company shall provide for the registration of
Notes and of transfers of Notes. Upon surrender for registration of transfer of any Note at the
principal office of the Company, the Company shall, at its expense, execute and deliver one or more
new Notes of like tenor and of a like aggregate principal amount, registered in the name of such
transferee or transferees. At the option of the holder of any Note, such Note may be exchanged for
other Notes of like tenor and of any authorized denominations, of a like aggregate principal
amount, upon surrender of the Note to be exchanged at the principal office of the Company.
Whenever any Notes are so surrendered for exchange, the Company shall, at its expense, execute and
deliver the Notes which the holder making the exchange is entitled to receive. Each installment of
principal payable on each installment date upon each new Note issued upon any such transfer or
exchange shall be in the same proportion to the unpaid principal amount of such new Note as the
installment of principal payable on such date on the Note surrendered for registration of transfer
or exchange bore to the unpaid principal amount of such Note. No reference need be made in any
such new Note to any installment or installments of principal previously due and paid upon the Note
surrendered for registration of transfer or exchange. Every Note surrendered for registration of
transfer or exchange shall be duly endorsed, or be accompanied by a written instrument of transfer
duly executed, by the holder of such Note or such holder’s attorney duly authorized in writing.
Any Note or Notes issued in exchange for any Note or upon transfer thereof shall carry the rights
to unpaid interest and interest to accrue which were carried by the Note so exchanged or
transferred, so that neither gain nor loss of interest shall result from any such transfer or
exchange. Upon receipt of written notice from the holder of any Note of the loss, theft,
destruction or mutilation of such Note and, in the case of any such loss, theft or destruction,
upon receipt of such holder’s unsecured indemnity agreement, or in the case of any such mutilation
upon surrender and cancellation of such Note, the Company will make and deliver a new Note, of like
tenor, in lieu of the lost, stolen, destroyed or mutilated Note.

11E. Persons Deemed Owners; Participations. Prior to due presentment for registration of
transfer, the Company may treat the Person in whose name any Note is registered as the owner and
holder of such Note for the purpose of receiving payment of principal of and interest on, and any
Yield-Maintenance Amount or Breakage Cost Obligations payable with respect to, such Note and for
all other purposes whatsoever, whether or not such Note shall be overdue, and the Company shall not
be affected by notice to the contrary. Subject to the preceding sentence, the holder of any Note
may from time to time grant participations in all or
any part of such Note to any Person on such terms and conditions as may be determined by such
holder in its sole and absolute discretion.

 

66

 

11F. Survival of Representations and Warranties; Entire Agreement. All representations
and warranties contained herein or made in writing by or on behalf of the Company in connection
herewith shall survive the execution and delivery of this Agreement and the Notes, the transfer by
any Purchaser of any Note or portion thereof or interest therein and the payment of any Note, and
may be relied upon by any Transferee, regardless of any investigation made at any time by or on
behalf of any Purchaser or any Transferee. Subject to the preceding sentence, this Agreement, the
Notes, each Supplement and the other Note Documents embody the entire agreement and understanding
between the parties hereto with respect to the subject matter hereof and supersede all prior
agreements and understandings relating to such subject matter.

11G. Successors and Assigns. All covenants and other agreements in this Agreement
contained by or on behalf of any of the parties hereto shall bind and inure to the benefit of the
respective successors and assigns of the parties hereto (including, without limitation, any
Transferee) whether so expressed or not.

11H. Independence of Covenants. All covenants hereunder shall be given independent
effect so that if a particular action or condition is prohibited by any one of such covenants, the
fact that it would be permitted by an exception to, or otherwise be in compliance within the
limitations of, another covenant shall not avoid the occurrence of a Default or Event of Default if
such action is taken or such condition exists.

11I. Notices. All written communications provided for hereunder (other than
communications provided for under paragraph 2) shall be sent by first class mail or nationwide
overnight delivery service (with charges prepaid) and (i) if to any Purchaser, addressed as
specified for such communications in the Purchaser Schedule attached hereto (in the case of
the Series A Notes) or the Purchaser Schedule attached to the applicable Supplement (in the
case of any Notes issued after the date hereof) or at such other address as any such Purchaser
shall have specified to the Company in writing, (ii) if to any other holder of any Note, addressed
to it at such address as it shall have specified in writing to the Company, or, if any such holder
shall not have so specified an address, then addressed to such holder in care of the last holder of
such Note which shall have so specified an address to the Company and (iii) if to the Company,
addressed to it at 9400 North Broadway, Suite 600, Oklahoma City, Oklahoma 73114, Attention: Jim
Merrill, with a copy to Crowe & Dunlevy at 20 North Broadway, Suite 1800, Oklahoma City, Oklahoma
73102, Attention: Michael M. Stewart; provided, however, that any such
communication to the Company may also, at the option of the Person sending such communication, be
delivered by any other means either to the Company at its address specified above or to any
Authorized Officer of the Company.

 

67

 

11J. Payments Due on Non-Business Days. Anything in this Agreement or the Notes to the
contrary notwithstanding, any payment of principal of, interest on, or Yield-Maintenance Amount or
Breakage Cost Obligations, if any, payable with respect to, any Fixed Rate Note that is due on a
date other than a Business Day shall be made on the next succeeding Business Day (or the immediately preceding Business Day, with respect to certain Loans, as
more fully described in the definition of “Interest Period”). If the date for any payment is
extended to the next succeeding Business Day by reason of the preceding sentence, (i) in the case
of Fixed Rate Notes, the period of such extension shall not be included in the computation of the
interest payable on such Business Day and (ii) in the case of Floating Rate Notes, the period of
such extension shall be included in the computation of the interest payable on such Business
Day.

11K. Severability. Any provision of this Agreement which is prohibited or unenforceable
in any jurisdiction shall, as to such jurisdiction, be ineffective to the extent of such
prohibition or unenforceability without invalidating the remaining provisions hereof, and any such
prohibition or unenforceability in any jurisdiction shall not invalidate or render unenforceable
such provision in any other jurisdiction.

11L. Descriptive Headings. The descriptive headings of the several paragraphs of this
Agreement are inserted for convenience only and do not constitute a part of this Agreement.

11M. Satisfaction Requirement. If any agreement, certificate or other writing, or any
action taken or to be taken, is by the terms of this Agreement required to be satisfactory to the
Series A Purchasers, any other Purchaser, to any holder of Notes or to the Required Holder(s), the
determination of such satisfaction shall be made by the Series A Purchasers, such Purchaser, such
holder or the Required Holder(s), as the case may be, in the sole and exclusive judgment (exercised
in good faith) of the Person or Persons making such determination.

11N. Governing Law. THIS AGREEMENT SHALL BE CONSTRUED AND ENFORCED IN ACCORDANCE WITH,
AND THE RIGHTS OF THE PARTIES SHALL BE GOVERNED BY, THE LAW OF THE STATE OF NEW YORK.

11O. Severalty of Obligations. The sales of Notes to the Purchasers are to be several
sales, and the obligations of the Purchasers under this Agreement are several obligations. No
failure by any Purchaser to perform its obligations under this Agreement shall relieve any other
Purchaser or the Company of any of its obligations hereunder, and no Purchaser shall be responsible
for the obligations of, or any action taken or omitted by, any other such Person hereunder.

11P. Counterparts. This Agreement may be executed in any number of counterparts, each of
which shall be an original, but all of which together shall constitute one instrument.

11Q. Binding Agreement. When this Agreement is executed and delivered by the Company and
the Series A Purchasers, it shall become a binding agreement between the Company and the Series A
Purchasers. This Agreement shall also inure to the benefit of each Additional Purchaser which
shall have executed and delivered a Supplement, and each such Purchaser shall be bound by this
Agreement to the extent provided in such Supplement.

 

68

 

11R. Waiver of Jury Trial; Consent to Jurisdiction.

(i) THE COMPANY AND EACH HOLDER OF NOTES HEREBY KNOWINGLY, VOLUNTARILY,
AND INTENTIONALLY WAIVES ANY RIGHTS IT MAY HAVE TO A TRIAL BY JURY IN ANY LITIGATION OF ANY
CLAIM WHICH IS BASED HEREON, OR ARISES OUT OF, UNDER, OR IN CONNECTION WITH THIS AGREEMENT,
THE NOTES OR THE OTHER NOTE DOCUMENTS, OR ANY TRANSACTIONS RELATING HERETO OR THERETO, OR
ANY COURSE OF CONDUCT, COURSE OF DEALING, STATEMENTS (WHETHER ORAL OR WRITTEN), OR ACTIONS
OF THE COMPANY OR THE HOLDERS OF THE NOTES. THE COMPANY ACKNOWLEDGES THAT THIS PROVISION IS
A MATERIAL INDUCEMENT FOR EACH PURCHASER TO BECOME A PARTY TO THIS AGREEMENT AND TO PURCHASE
NOTES HEREUNDER.

(ii) ANY LEGAL ACTION OR PROCEEDING WITH RESPECT TO THIS AGREEMENT, THE NOTES,
THE OTHER NOTE DOCUMENTS OR ANY TRANSACTIONS RELATING HERETO OR THERETO, OR ANY COURSE OF
CONDUCT, COURSE OF DEALING, STATEMENTS (WHETHER ORAL OR WRITTEN), OR ACTIONS OF THE COMPANY
OR THE HOLDERS OF NOTES MAY BE BROUGHT IN THE COURTS OF THE STATE OF NEW YORK OR THE UNITED
STATES OF AMERICA FOR THE SOUTHERN DISTRICT OF NEW YORK, AND THE COMPANY HEREBY ACCEPTS FOR
ITSELF AND IN RESPECT OF ITS PROPERTY, GENERALLY AND UNCONDITIONALLY, THE NON-EXCLUSIVE
JURISDICTION OF THE AFORESAID COURTS. THE COMPANY AND EACH HOLDER OF NOTES HEREBY
IRREVOCABLY WAIVES ANY OBJECTIONS, INCLUDING, WITHOUT LIMITATION, ANY OBJECTION TO THE
LAYING OF VENUE OR BASED ON THE GROUNDS OF FORUM NON CONVENIENS, WHICH IT MAY NOW OR
HEREAFTER HAVE TO THE BRINGING OF ANY SUCH ACTION OR PROCEEDING IN SUCH RESPECTIVE
JURISDICTIONS.

(iii) The Company hereby agrees that process may be served on it by certified
mail, return receipt requested, to the address pertaining to it as specified in paragraph
11I. Any and all service of process and any other notice in any such action, suit or
proceeding shall be effective against the Company if given by registered or certified mail,
return receipt requested, or by any other means or mail which requires a signed receipt,
postage prepaid, mailed as provided above.

{Remainder of this page blank; signature page(s) follow.}

 

69

 

If you are in agreement with the foregoing, please sign the form of acceptance on the enclosed
counterpart of this letter and return the same to the Company, whereupon this letter shall become a
binding agreement between the Company and you.

	 	 	 	 	 
	 	 	Very truly yours,
	 
	 	 	 	 
	 	 	GMX Resources Inc.
	 
	 	 	 	 
	 

	 	By:
	 	/s/ Ken L. Kenworthy, Sr.
	 

	 	 	 	 
	 

	 	 	 	Title: CFO

The foregoing Agreement is hereby accepted

as of the date first above written.

The Prudential Insurance Company of America

	 	 	 	 	 
	By:

	 	/s/ Kelly Brendel
 

Vice President
	 	 

Signature Page to Master Shelf Agreement

 

 

 

“Schedules and Exhibits Intentionally Omitted”.Filed by Bowne Pure Compliance

 

Exhibit 10.6(b)

EXECUTION VERSION

INTERCREDITOR AGREEMENT

THIS INTERCREDITOR AGREEMENT (as amended, supplemented or otherwise modified from time to
time, this “Agreement”), dated as of July 31, 2007, is made by and among the institutional
investors listed under the caption “Noteholders” on the signature pages hereto (collectively,
together with the other holders from time to time of the hereinafter described NPA Notes and their
successors and assigns, the “Noteholders”); Capital One, National Association, and Union Bank of
California, N.A. (collectively, together with the other lenders from time to time party to the
hereinafter described Bank Loan Agreement and their successors and assigns, the “Banks”); Capital
One, National Association, as agent for the Banks (in such capacity, the “Bank Agent”), and The
Bank of New York Trust Company, N.A., as collateral agent for the Noteholders (together with its
successors and assigns in such capacity, the “Noteholder Collateral Agent”).

RECITALS

A. GMX Resources Inc., an Oklahoma corporation (the “Company”), and the initial Noteholders
signatory hereto are entering into a Note Purchase Agreement, dated as of even date herewith (as
amended, supplemented and otherwise modified from time to time, the “Note Agreement”), pursuant to
which the Company will issue and such Noteholders will purchase the Company’s Senior Subordinated
Secured Notes, Series A, due 2012 in the aggregate principal amount of $30,000,000 (including any
notes delivered in substitution or exchange therefor, the “Series A Notes”). Further, the Note
Agreement contemplates that the Company, subject to the satisfaction of the conditions specified
therein, may hereafter issue additional Senior Subordinated Secured Notes (including any notes
delivered in substitution or exchange therefor, the “Additional Notes” and, together with the
Series A Notes, the “NPA Notes”), which Additional Notes shall be secured ratably by and on a pari
passu basis with the Series A Notes, provided that the purchasers of such Additional Notes
execute a Supplement to the Intercreditor Agreement substantially in the form of Attachment
A hereto and that the issuance thereof is permitted by the Bank Agreement.

B. The Company and the Banks have entered into an Amended and Restated Loan Agreement (as
amended, supplemented, restated and otherwise modified from time to time, and including any
refinancing of the indebtedness thereunder, the “Bank Loan Agreement”), dated as of June 7, 2006
and amended on the date hereof by the Fifth Amendment to the Loan Agreement among the Company, the
Bank Agent, and the Union Bank of California, N.A., pursuant to which the Banks have agreed,
subject to the satisfaction of the conditions set forth therein, to extend credit to the Company,
in the form of loans and letters of credit, in an aggregate principal amount of up to $100,000,000
under the current terms set forth therein.

C. Certain of the Banks or their Affiliates have entered, or may hereafter enter, into Swap
Agreements with the Company in connection with the Bank Loan Agreement and the activities of the
Company and its Subsidiaries.

 

1

 

D. The Company and certain of its Subsidiaries have heretofore executed and delivered, and may
hereafter from time to time execute and deliver, various mortgages, deeds of trust, security
agreements, pledge agreements, deposit account control agreements, assignments, letters-in-lieu,
financing statements and other documents required pursuant to the Bank Loan Agreement (the
foregoing, together with any amendments, restatements, supplements and other modifications thereto,
being collectively the “Bank Security Documents”) providing liens and security interests in favor
of the Senior Indebtedness Representative, for the benefit of the Banks and any Bank Affiliates
parties to any Swap Agreement, in the property described in such Bank Security Documents in order
to secure the obligations under and in respect of the Bank Loan Agreement and such Swap Agreements.

E. The Company and certain of its Subsidiaries, on the Date of Closing and thereafter from
time to time, will execute and deliver various mortgages, deeds of trust, security agreements,
pledge agreements, assignments, financing statements and other documents required pursuant to the
Note Agreement (the foregoing, together with any amendments, restatements, supplements and other
modifications thereto, being collectively, the “Note Security Documents”), providing liens and
security interests in favor of the Noteholder Collateral Agent for the benefit of the Noteholders
in the property described in such Note Security Documents in order to secure the obligations under
and in respect of the NPA Notes and the Note Agreement.

F. The Company, the Noteholders and the Banks have agreed that, from and after the Date of
Closing, the obligations of the Company and the Guarantors under and in respect of the Bank Loan
Documents are to be secured by all of the collateral under the Bank Security Documents on a first
priority basis whereas the obligations of the Company and the Guarantors under and in respect of
the Note Documents are to be secured by all of the collateral under the Note Security Documents on
a second priority basis.

G. The Company, the Noteholders and the Banks have agreed that, from and after the Date of
Closing, the obligations of the Company and the Guarantors under and in respect of Bank Loan
Documents are to be senior in right of payment to the obligations of the Company and the Guarantors
under and in respect to the Note Documents on the terms hereinafter set forth.

H. It is a condition precedent to the effectiveness of the amendment to the Bank Loan
Agreement described in Recital B above and the Note Agreement that this Agreement shall have been
executed and delivered in order to set forth the agreement of the parties with respect to the
subject matter hereof.

NOW, THEREFORE, in consideration of the premises and the mutual covenants herein contained and
for other good and valuable consideration, the receipt and sufficiency of which are hereby
acknowledged, the parties hereto hereby agree as follows:

ARTICLE I

DEFINITIONS

The following terms, as used herein (whether in the singular or the plural form), have the
following meanings:

“Additional Notes” shall have the meaning specified in Recital A of this Agreement.

 

2

 

“Affiliate”, when used with respect to any Person, shall mean any other Person controlling,
controlled by or under common control with such first-mentioned Person.

“Agreement” shall have the meaning specified in the preamble of this Agreement.

“Bank Agent” shall have the meaning specified in the preamble of this Agreement.

“Bank Loan Agreement” shall have the meaning specified in Recital B of this Agreement.

“Bank Loan Documents” means, collectively, (a) the Bank Loan Agreement and the Eligible Swap
Agreements, (b) any note, bond or other instrument evidencing Senior Indebtedness, (c) all Bank
Security Documents, (d) all guarantees of the Senior Indebtedness, (e) all other documents,
instruments or agreements relating to the Senior Indebtedness now or hereafter executed or
delivered by and among the Company, any Subsidiary, the Senior Indebtedness Representative or any
Bank, and (f) all renewals, extensions, amendments, modifications or restatements of the foregoing.

“Banks” shall have the meaning specified in the preamble of this Agreement.

“Bank Security Documents” shall have the meaning specified in Recital D of this Agreement.

“Blockage Period” means a Non-Payment Blockage Period or a Payment Blockage Period.

“Business Day” shall mean any day other than a Saturday, a Sunday or a day on which commercial
banks in New York, New York, Houston, Texas, or Tulsa, Oklahoma are required or authorized to be
closed.

“Company” shall have the meaning specified in Recital A of this Agreement.

“Date of Closing” shall mean July 31, 2007.

“Eligible Swap Agreement” means any present or future Swap Agreement between the Company or
any Subsidiary and any Bank or any Affiliate of any Bank. For the avoidance of doubt, a Swap
Agreement ceases to be an Eligible Swap Agreement if the Person that is the counterparty to the
Company under a Swap Agreement ceases to be a Bank under the Bank Loan Agreement (or, in the case
of an Affiliate of a Bank, the lender affiliated therewith ceases to be a Bank under the Bank Loan
Agreement).

 

3

 

“Enforcement Action” means, with respect to any Subordinated Obligations, any enforcement of
any right or remedy including any enforcement or foreclosure of Liens granted
by the Company or any Subsidiary to secure any or all of such Subordinated Obligations, any
enforcement or foreclosure of Liens on any capital stock or other equity interests in the Company
or any Subsidiary which may be granted by the Company or its Subsidiaries or any holder of equity
in the Company to secure any or all of such Subordinated Obligations, or any other efforts to
collect proceeds from the Company’s or any of its Subsidiary’s assets or properties (including
proceeds of production) to satisfy the Subordinated Obligations, including, without limitation, the
commencement, or the joining with any other creditor of the Company or any Subsidiary in the
commencement, of any Insolvency Proceeding against the Company or any Subsidiary; provided,
that none of the following shall constitute an Enforcement Action: (a) acceleration of any of the
Subordinated Obligations following any Senior Indebtedness Acceleration (provided that such Senior
Indebtedness Acceleration has not previously been rescinded), (b) actions by any Noteholder to
obtain possession of or receive Reorganization Securities, or (c) any action described above taken
during the existence of any Insolvency Proceeding subject to the jurisdiction of a court of
competent authority.

“Event of Default” shall have the meaning specified in the Note Agreement.

“Guarantor” shall mean any Subsidiary or other Person that guarantees all or any portion of
the obligations of the Company under any Bank Loan Document or any Note Document.

“Insolvency Proceeding” shall mean (a) any voluntary or involuntary case, action or proceeding
before any governmental authority having jurisdiction over the applicable Person or its assets
relating to bankruptcy, reorganization, insolvency, liquidation, receivership, dissolution,
winding-up or relief of debtors, or (b) any general assignment for the benefit of creditors,
composition, marshaling of assets for creditors or other similar arrangement in respect of the
applicable Person’s creditors generally or any substantial portion of its creditors, in each case
whether undertaken under U.S. Federal, state, or foreign law.

“Liens” shall mean any interest in property securing an obligation owed to, or claimed by, a
Person other than the owner of the property, whether such interest is based on jurisprudence,
statute or contract, and including without limitation the lien or security interest arising from a
mortgage, pledge, security agreement, production payment, conditional sale, bond for deed or trust
receipt or a lease, consignment or bailment for security purposes. For purposes of this
definition, a Person shall be deemed to be the owner of any property that it has acquired or holds
subject to a conditional sale agreement, financing lease or other arrangement pursuant to which
title to such property has been retained by or vested in some other Person for security purposes.

“Non-Payment Blockage Period” means, with respect to any Non-Payment Default, the period from
and including the date of receipt by the Noteholders of a Non-Payment Default Notice relating
thereto until the first to occur of (a) the date upon which the Senior Indebtedness has been paid
in full in cash, all commitments of the holders of Senior Indebtedness to make loans or extensions
of credit have terminated, and all letters of credit issued by any holder of Senior Indebtedness
have expired, terminated or become fully collateralized in cash, (b) the 90th day after receipt by
the Noteholders of such Non-Payment Default Notice, (c) the date on which the Non-Payment Default
that is the subject of such Non-Payment Default Notice has been waived in writing by the applicable holder or holders of the Senior Indebtedness or
the Senior Indebtedness Representative on their behalf, or has been cured or otherwise ceased to
exist, or (d) the date upon which the Person(s) giving such Non-Payment Default Notice notify the
Noteholders in writing of the termination of such Non-Payment Blockage Period.

 

4

 

“Non-Payment Default” means the occurrence of any event under any Bank Loan Document, not
constituting a Payment Default, which gives the holder(s) of the Senior Indebtedness under the Bank
Loan Agreement, or the Senior Indebtedness Representative acting on behalf of such holder(s), the
right to cause the maturity of such Senior Indebtedness to be accelerated immediately without any
further notice (except such notice as may be required to effect such acceleration), including (if
applicable) by virtue of the expiration of any applicable grace period.

“Non-Payment Default Notice” means a written notice from or on behalf of the Senior
Indebtedness Representative that a Non-Payment Default has occurred and is continuing which
identifies such Non-Payment Default and specifically designates such notice as a “Non-Payment
Default Notice”.

“Note Agreement” shall have the meaning specified in Recital A of this Agreement.

“Note Documents” means, collectively, (a) the Note Agreement, (b) the NPA Notes or any other
instrument evidencing Subordinated Obligations, (c) all Note Security Documents, (d) all guarantees
of the Subordinated Obligations, (d) all other documents, instruments or agreements relating to the
Subordinated Obligations now or hereafter executed or delivered by and among the Company, any
Subsidiary, the Noteholder Collateral Agent or any Noteholder, and (e) all renewals, extensions,
amendments, modifications or restatements of the foregoing.

“Noteholder Collateral Agent” shall have the meaning specified in the preamble of this
Agreement.

“Noteholders” shall have the meaning specified in the preamble of this Agreement.

“Note Security Documents” shall have the meaning specified in Recital E of this Agreement.

“NPA Notes” shall have the meaning specified in Recital A of this Agreement.

“Payment Blockage Period” means, with respect to any Payment Default or Senior Indebtedness
Acceleration, the period from and including the date of receipt by the Noteholders of a Payment
Default Notice relating thereto until the first to occur of (a) the date upon which the Senior
Indebtedness has been paid in full in cash, all commitments of the holders of Senior Indebtedness
to make loans or extensions of credit have terminated, and all letters of credit issued by any
holder of Senior Indebtedness have expired, terminated or become fully collateralized in cash, (b)
if such Payment Default Notice relates to a Payment Default, the date on which the Payment Default
which is the subject of such Payment Default Notice has been waived in writing by the applicable holder or holders of the Senior Indebtedness or the Senior
Indebtedness Representative on their behalf, or has been cured or otherwise ceased to exist, or if
such Payment Default Notice relates to a Senior Indebtedness Acceleration, the date on which such
acceleration is rescinded, annulled or otherwise ceased to exist, or (c) the day upon which the
Person(s) giving such Payment Default Notice notify the Noteholders in writing of the termination
of such Payment Blockage Period.

 

5

 

“Payment Default” means a default by the Company or any Guarantor in the payment of any amount
owing with respect to the Senior Indebtedness, whether with respect to principal, interest,
premium, letter of credit reimbursement obligations, commitment fees or letter of credit fees or
otherwise when the same becomes due and payable, whether at maturity or at a date fixed for payment
of an installment or prepayment or by declaration or acceleration or otherwise.

“Payment Default Notice” means a written notice from or on behalf of the Senior Indebtedness
Representative that either (i) a Payment Default with respect to specified Senior Indebtedness has
occurred and is continuing, or (ii) a Senior Indebtedness Acceleration with respect to such Senior
Indebtedness has occurred and is continuing.

“Person” means any individual, corporation, limited liability company, partnership, joint
venture, association, joint stock company, trust, unincorporated organization, government or any
agency or political subdivision thereof, or any other form of entity.

“Reorganization Securities” means (a) debt securities that are issued pursuant to an
Insolvency Proceeding the payment of which is subordinate and junior at least to the extent
provided in Article II to the payment of the Senior Indebtedness outstanding at the time of the
issuance thereof (including any refinancing of Senior Indebtedness pursuant to an Insolvency
Proceeding) and to the payment of all debt securities issued in exchange for such Senior
Indebtedness in such Insolvency Proceeding (whether such subordination is effected by the terms of
such securities, by an order or decree issued in such Insolvency Proceeding, by agreement of the
Noteholders or otherwise), or (b) equity securities that are issued pursuant to an Insolvency
Proceeding; provided, in either case, that such securities are authorized by an order or
decree made by a court of competent jurisdiction in such Insolvency Proceeding.

“Required Banks” means, at any time, Banks in the aggregate holding at least sixty-six and
two-thirds percent (66-2/3%) of the outstanding principal amount of loans under the Bank Loan
Agreement, or if no such loans are then outstanding, Banks holding at least sixty-six and
two-thirds percent (66-2/3%) of the total commitments under the Bank Loan Agreement.

“Required Noteholders” means, at any time, the holder or holders of greater than 50% of the
aggregate principal amount of the NPA Notes outstanding at such time.

“Scheduled Payment” shall have the meaning specified in Section 2.2.

  

6

 

“Senior Indebtedness” means and includes (a) all principal indebtedness for loans now
outstanding or hereafter incurred, and all letter of credit reimbursement obligations now existing
or hereafter arising, under the Bank Loan Agreement, provided that the aggregate
outstanding principal amount of Senior Indebtedness under this clause (a) shall not exceed $125,000,000 at any time, and provided further, that if the aggregate principal amount
of Senior Indebtedness (constituting principal and letter of credit reimbursement obligations)
shall exceed $125,000,000, then the subordination of the NPA Notes as contemplated by Article II to
the Senior Indebtedness of $125,000,000 or less shall not be impaired but shall be ineffective
with respect to any amount in excess of $125,000,000, (b) all amounts now or hereafter owing to any
of the Banks or any of their Affiliates under any Eligible Swap Agreement, (c) all interest
accruing on the Senior Indebtedness described in the preceding clauses (a) and (b), and (d) all
other monetary obligations (whether now outstanding or hereafter incurred) for which the Company or
any Guarantor is responsible or liable as obligor, guarantor or otherwise under or pursuant to any
of the Bank Loan Documents including, without limitation, all fees, premiums, yield protections,
breakage costs, damages, indemnification obligations, reimbursement obligations, and expenses
(including, without limitation, fees and expenses of counsel to the Senior Indebtedness
Representative and the Banks) together with interest on the foregoing to the extent provided for in
the Bank Loan Documents. The interest described in the preceding clause (c) and the premiums
described in the preceding clause (d) include, without limitation, all interest accruing after the
commencement of any Insolvency Proceeding, and “make-whole” or other premiums, payable under the
terms of the Bank Loan Agreement, whether or not such interest or premiums constitute an allowed,
secured or unsecured claim in any such Insolvency Proceeding.

“Senior Indebtedness Acceleration” means, with respect to the Senior Indebtedness under the
Bank Agreement, that the holder or holders of such Senior Indebtedness, or an agent or
representative on behalf of such holder or holders, have caused the maturity of such Senior
Indebtedness to be accelerated.

“Senior Indebtedness Default” means a Payment Default or a Non-Payment Default .

“Senior Indebtedness Representative” means (a) initially, the Bank Agent, or (b) such other
Person selected by the Required Banks to replace the Bank Agent or the then-serving Senior
Indebtedness Representative.

“Series A Notes” shall have the meaning specified in Recital A of this Agreement.

“Standstill Period” means the period beginning with the commencement of a Blockage Period and
ending on the earliest of (a) the date when the Senior Indebtedness Default giving rise to such
Blockage Period has been cured or waived in writing, (b) the date that the Senior Indebtedness has
been repaid in full in cash, all commitments of the holders of Senior Indebtedness to make loans or
extensions of credit have terminated, and all letters of credit issued by any holder of Senior
Indebtedness have expired, terminated or become fully collateralized in cash, (c) the date that is
90 days after the commencement of a Blockage Period, (d) the end of the Non-Payment Blockage Period
applicable to such Senior Indebtedness Default, (e) the date on which a Senior Indebtedness
Acceleration occurs or any holder of Senior Indebtedness commences proceedings to collect any
Senior Indebtedness or realize upon any collateral for any Senior Indebtedness and (f) the date
upon which any Insolvency Proceeding is commenced.

 

7

 

“Subordinated Obligations” means any and all indebtedness (whether for principal, interest,
premium, breakage costs, fees, indemnifications or otherwise, but not expenses) now or hereafter
owing by the Company or any Guarantor under or in connection with the Note Agreement or any other
Note Document, or any letter agreement or other agreement providing for the payment of fees in
connection therewith.

“Subsidiary” means each corporation of which the Company owns, directly or indirectly, 50% or
more of the outstanding capital stock, and each partnership, limited liability company or other
Person of which the Company owns, directly or indirectly, 50% or more of the outstanding
partnership, membership or other ownership or voting interest.

“Swap Agreement” means any agreement or arrangement providing for payments that are related
to, or the value of which is dependent upon, fluctuations of interest rates, currency exchange
rates or forward rates, or fluctuations of commodity prices, including without limitation any swap
agreement, cap, collar, floor, exchange transaction, forward agreement or exchange or protection
agreement or similar futures contract or swap or other derivative agreement related to interest
rates, currency exchange rates or hydrocarbons or other commodities, or any option with respect to
such transaction.

“Swap Termination Value” means, in respect of any one or more Swap Agreements, after taking
into account the effect of any legally enforceable netting agreement relating to such Swap
Agreements, (a) for any date on or after the date such Swap Agreements have been closed out and
termination value(s) determined in accordance therewith, such termination value(s), and (b) for any
date prior to the date referenced in clause (a), the amount(s) determined as the mark-to-market
value(s) for such Swap Agreements, as determined based upon one or more mid-market or other readily
available quotations provided by any recognized dealer in such Swap Agreements.

ARTICLE II

TERMS OF SUBORDINATION

Section 2.1 Subordination of Obligations. The Company and each Subsidiary covenant
and agree, and each Noteholder by its acceptance of an NPA Note covenants and agrees, that the
payment of the Subordinated Obligations shall, to the extent set forth in this Agreement, be
subordinate and junior and subject in right of payment to the prior payment in full in cash of all
Senior Indebtedness, whether outstanding on the date hereof or hereafter created, incurred, assumed
or guaranteed.

Section 2.2 Payment Default or Acceleration. Except under circumstances when the
terms of Section 2.5 are applicable, if (a) a Payment Default or Senior Indebtedness Acceleration
shall have occurred and be continuing and (b) the Noteholder Collateral Agent shall have received a
Payment Default Notice, then during the applicable Payment Blockage Period neither the Company nor
any Subsidiary may make, and no Noteholder shall accept, receive or collect, any direct or indirect
payment or distribution of any kind or character (in cash, securities, other property, by setoff or
otherwise, other than Reorganization Securities) of any properties or assets of the Company or any
Subsidiary on account of the Subordinated Obligations; provided, however, that in
the case of any payment on or in respect of any Subordinated Obligation that

 

8

 

would (in the absence of any such Payment Default Notice) have been due and payable on any
date (a “Scheduled Payment Date”) during such Payment Blockage Period pursuant to the terms of the
Note Agreement as in effect on the date hereof or as amended consistent with the provisions of
Section 2.12, the provisions of this Section 2.2 shall not prevent the making and acceptance of
such payment (a “Scheduled Payment”), together with any additional default interest as is due on
the NPA Notes, on or after the date immediately following the termination of such Payment Blockage
Period. In the event that, notwithstanding the foregoing, the Company or any Subsidiary shall make
any payment or distribution to any Noteholder prohibited by the foregoing provisions of this
Section 2.2, then and in such event such payment or distribution shall be held in trust for the
benefit of, and immediately shall be paid over to, the holders of the Senior Indebtedness or the
Senior Indebtedness Representative for application against the Senior Indebtedness remaining unpaid
until such Senior Indebtedness is paid in full in cash. Any Payment Default Notice shall be deemed
received by the Noteholder Collateral Agent upon the date of actual receipt by it of such Payment
Default Notice in writing.

Section 2.3 Non-Payment Default. Except under circumstances when the terms of Section
2.2 or Section 2.5 are applicable, if (a) a Non-Payment Default shall have occurred and be
continuing, (b) the Noteholder Collateral Agent shall have received a Non-Payment Default Notice,
and (c) no Non-Payment Default Notice shall have been received within the 365-day period
immediately preceding the receipt of such Non-Payment Default Notice, then neither the Company nor
any Subsidiary may make, and no Noteholder shall accept, receive or collect, any direct or indirect
payment or distribution of any kind or character (in cash, securities, other property, by setoff or
otherwise, other than Reorganization Securities) of any properties or assets of the Company or any
Subsidiary on account of the Subordinated Obligations during the Non-Payment Blockage Period;
provided, however, that in the case of any payment on or in respect of any
Subordinated Obligation that would (in the absence of any such Non-Payment Default Notice) have
been due and payable on any Scheduled Payment Date during such Non-Payment Blockage Period pursuant
to the terms of the Note Agreement as in effect on the date hereof or as amended consistent with
the requirements of Section 2.12, the provisions of this Section 2.3 shall not prevent the making
and acceptance of such Scheduled Payment, together with any additional default interest as is due
on the NPA Notes, on or after the date immediately following the termination of such Non-Payment
Blockage Period; and provided, further, that Non-Payment Blockage Periods shall not be in
effect for more than 180 days during any period of 365 consecutive days. In the event that,
notwithstanding the foregoing, the Company or any Subsidiary shall make any payment or distribution
to any Noteholder prohibited by the foregoing provisions of this Section 2.3, then and in such
event such payment or distribution shall be held in trust for the benefit of, and immediately shall
be paid over to, the holders of the Senior Indebtedness or the Senior Indebtedness Representative
for application against the Senior Indebtedness remaining unpaid until such Senior Indebtedness is
paid in full in cash. Any Non-Payment Default Notice shall be deemed received by the Noteholder
Collateral Agent upon the date of actual receipt by it of such Non-Payment Default Notice in
writing.

 

9

 

Section 2.4 Standstill. At any time that the Noteholders are not permitted to receive
payments on the Subordinated Obligations pursuant to either Section 2.2 or Section 2.3, the
Noteholders and the Noteholder Collateral Agent will not commence any Enforcement Action relative
to the Company or any Subsidiary during the Standstill Period. Upon the termination of the
Standstill Period, the Noteholders and the Noteholder Collateral Agent may exercise all
 rights or remedies they may have in law or equity; provided, however, that if
a Standstill Period terminates pursuant to clause (e) of the definition thereof, neither the
Noteholder Collateral Agent nor any Noteholder shall exercise any remedies against, or attempt to
foreclose upon, garnish, sequester or execute upon, any property known to it to constitute
collateral for the Senior Indebtedness (other than to file or record any judgment Liens it may have
obtained against such collateral) during the period that such Standstill Period would have been in
effect but for termination pursuant to clause (e) of the definition of “Standstill Period;”
provided further, that the Payment Blockage Period or the Non-Payment Blockage Period, as
the case may be, if not also terminated, shall continue for its full period notwithstanding the
termination of the Standstill Period. Notwithstanding the foregoing, no Standstill Period may be
commenced while any other Standstill Period exists or within 365 days following the termination of
any prior Standstill Period (provided that this sentence shall not relieve any Noteholder
of its obligation to provide notice under Section 2.9).

Section 2.5 Insolvency; Bankruptcy; Etc. In the event of the institution of any
Insolvency Proceeding relative to the Company or any Subsidiary, then:

(a) The holders of the Senior Indebtedness shall be entitled to receive payment in full in
cash of the Senior Indebtedness before the Noteholders are entitled to receive any direct or
indirect payment or distribution of any kind or character, whether in cash, property or securities
(other than Reorganization Securities) on account of the Subordinated Obligations.

(b) Any direct or indirect payment or distribution of any kind or character, whether in cash,
property or securities, by setoff or otherwise, which may be payable or deliverable in such
proceedings in respect of the Subordinated Obligations but for the provisions of this Article II
shall be paid or delivered by the Person making such payment or distribution, whether the Company,
a Subsidiary of the Company, a trustee in bankruptcy, a receiver, a liquidating trustee, or
otherwise, directly to the holders of the Senior Indebtedness or the Senior Indebtedness
Representative, to the extent necessary to make payment in full in cash of all Senior Indebtedness
remaining unpaid; provided, however, that no such delivery of any Reorganization
Securities shall be made to any holders of the Senior Indebtedness or to the Senior Indebtedness
Representative. In the event that, notwithstanding the foregoing provisions of this Section 2.5,
any Noteholder shall receive any such payment or distribution of any kind or character, whether in
cash, property or securities, by setoff or otherwise, before all Senior Indebtedness is paid in
full in cash, which is required to be paid to the holders of the Senior Indebtedness under the
foregoing provisions of this Section 2.5, then and in such event such payment or distribution shall
be held in trust for the benefit of and immediately shall be paid over to the holders of the Senior
Indebtedness or the Senior Indebtedness Representative for application to the payment of all Senior
Indebtedness remaining unpaid until all such Senior Indebtedness shall have been paid in full in
cash.

(c) If no proof of claim is filed in any Insolvency Proceeding with respect to any
Subordinated Obligations by the tenth day prior to the bar date for any such proof of claim, the
Senior Indebtedness Representative may, after written notice to the Noteholders, file such a proof
of claim on behalf of the Noteholders, and each Noteholder hereby irrevocably appoints the Senior
Indebtedness Representative as its agent and attorney-in-fact for such limited purpose;
provided, that the foregoing shall not confer upon the holder of any Senior
Indebtedness the right to vote on behalf of any Noteholder in any Insolvency Proceedings.

 

10

 

Section 2.6 No Impairment. No right of any present or future holder of Senior
Indebtedness, or of the Senior Indebtedness Representative, to enforce subordination as herein
provided shall at any time in any way be prejudiced or impaired by any act or failure to act on the
part of the Company or any Subsidiary or by any non-compliance by the Company or any Subsidiary
with the terms, provisions, and covenants of this Article II, the Note Agreement or the NPA Notes,
regardless of any knowledge thereof any such Noteholder may have or be otherwise charged with. The
provisions of this Article II shall be enforceable directly by any present or future holder of the
Senior Indebtedness and/or the Senior Indebtedness Representative.

Section 2.7 Rights of Creditors; Subrogation. The provisions of this Article II are
for the purpose of defining the relative rights of the holders of the Senior Indebtedness on the
one hand, and the Noteholders on the other hand, and nothing herein shall impair, as between the
Company and the Guarantors and the Noteholders, the obligations of the Company and the Guarantors,
which are unconditional and absolute, to pay to the Noteholders the principal thereof and interest
and yield-maintenance amount or other premium, if any, thereon in accordance with their terms and
the provisions thereof, nor shall anything herein, except as otherwise provided in Section 2.4,
prevent the Noteholders or the Noteholder Collateral Agent from exercising all remedies otherwise
permitted by applicable law or hereunder upon default under the Note Agreement or under the NPA
Notes (including the right to demand payment and sue for performance thereof and of the NPA Notes
and to accelerate the maturity thereof as provided by the terms of the NPA Notes), subject to the
rights of holders of the Senior Indebtedness under this Article II. Upon payment in full of the
Senior Indebtedness in cash and termination of the commitments of the holders of the Senior
Indebtedness to make loans or extensions of credit under the Bank Loan Agreement, and expiration,
termination or cash collateralization of all letters of credit issued by any holder of the Senior
Indebtedness, the Noteholders shall, to the extent of any payments or distributions paid or
delivered to the holders of the Senior Indebtedness or otherwise applied to the Senior Indebtedness
pursuant to the provisions of this Article II, be subrogated to the rights of the holders of the
Senior Indebtedness to receive payments or distributions of assets of the Company or any Guarantor
made on Senior Indebtedness (and any security therefor) until the Subordinated Obligations shall be
paid in full (and, for this purpose, no such payments or distributions paid or delivered to the
holders of the Senior Indebtedness or to the Senior Indebtedness Representative, or otherwise
applied to the Senior Indebtedness, shall be deemed to have discharged the Subordinated
Obligations), and, for the purposes of such subrogation, no payments to the holders of the Senior
Indebtedness or to the Senior Indebtedness Representative of any cash, assets, stock, or
obligations to which the Noteholders would be entitled except for the provisions of this Article II
shall, as between the Company and the Guarantors, any of their respective creditors (other than the
holders of the Senior Indebtedness), and the Noteholders, be deemed to be a payment by the Company
or any Guarantor to or on account of Senior Indebtedness. The fact that failure to make any
payment on account of the Subordinated Obligations is caused by reason of the operation of any
provision of this Article II shall not be construed as preventing the occurrence of an Event of
Default.

 

11

 

Section 2.8 Payments on Senior Indebtedness. In the event that any Noteholder
determines in good faith that evidence is required with respect to the right of any holder of the
Senior Indebtedness to participate in any payment or distribution from such Noteholder
pursuant to this Article II or the amount of such participation, such Noteholder may request such
Person to furnish evidence to the reasonable satisfaction of such Noteholder as to the amount of
Senior Indebtedness held by such Person, the extent to which such Person is entitled to participate
in such payment or distribution and any other facts pertinent to the rights of such Person under
this Article II, and if such evidence is not furnished, such Noteholder may defer any payment to
such Person pending judicial determination as to the right of such Person to receive such payment;
provided that, upon the written request of such Person to such Noteholder, such payment
shall be made to the court having jurisdiction over such judicial determination or to another
Person mutually satisfactory to such Person and such Noteholder, as escrowee, to be held and
invested pending such judicial determination in accordance with such instructions as shall be
mutually satisfactory to such Person and such Noteholder and, upon such judicial determination
becoming final and non-appealable, to be distributed in accordance therewith to the Person entitled
thereto.

Section 2.9 Notice of Acceleration, Enforcement Action.

(a) Each Noteholder agrees that in the event any Event of Default shall occur, and as a result
thereof, any Noteholder accelerates maturity of any NPA Note, then such Noteholder shall give
prompt (and in any event within three (3) Business Days) notice thereof in writing to the Senior
Indebtedness Representative with a copy to the Noteholder Collateral Agent. Neither the Company
nor any Subsidiary may pay the NPA Notes until ten (10) Business Days after the Senior Indebtedness
Representative receives the notice described above and, after that ten (10) Business Day period,
may pay the NPA Notes, and the Noteholders may receive or collect such payment, only if the
provisions of this Article II do not prohibit such payment at that time.

(b) Each Noteholder and the Noteholder Collateral Agent agree that in the event any Event of
Default shall occur and, as a result thereof, such Noteholder or the Noteholder Collateral Agent
intends to commence any Enforcement Action, then such Noteholder or the Noteholder Collateral
Agent, as the case may be, shall first deliver notice thereof in writing to the Senior Indebtedness
Representative (with a copy (x) to the Noteholder Collateral Agent, if such notice is being given
by one or more Noteholders, or (y) to each Noteholder, if such notice is being given by the
Noteholder Collateral Agent) both (i) not less than ten (10) days prior to taking any such
Enforcement Action, and (ii) one (1) Business Day after such Enforcement Action is taken.

Section 2.10 Reinstatement. The provisions of this Article II shall remain in force
and effect until the indefeasible payment in full of all Senior Indebtedness and the termination of
all commitments of the holders of the Senior Indebtedness to make loans or extensions of credit,
and the expiration, termination or cash-collateralization of all letters of credit issued by any
holder of the Senior Indebtedness. To the extent any payment of or distribution in respect of the
Senior Indebtedness (whether by or on behalf of the Company or any of its Subsidiaries, as proceeds
of security or enforcement of any right of set-off or otherwise) is declared to be fraudulent or
preferential, set aside or required to be paid to the Company or any Subsidiary or any receiver,
trustee in bankruptcy, liquidating trustee, agent or other similar Person under any bankruptcy,
insolvency, receivership, fraudulent conveyance or similar law, then if such payment or
distribution is recovered by, or paid over to, the Company or any Subsidiary or such receiver,
trustee in bankruptcy, liquidating trustee, agent or other similar Person, the Senior Indebtedness
or part thereof originally intended to be satisfied shall be deemed to be reinstated and
outstanding as if such payment has not occurred and the provisions of this Article II shall
continue to be applicable in respect of said reinstated Senior Indebtedness.

 

12

 

Section 2.11 Rights of Holders of the Senior Indebtedness. The holders of the Senior
Indebtedness may, at any time and from time to time subject to the terms of the Senior
Indebtedness, without the consent of or notice to the Noteholders or the Noteholder Collateral
Agent, without incurring responsibility to the Noteholders and without impairing or releasing the
subordination or other benefits provided in this Article II or the obligations hereunder of the
Noteholders to the holders of the Senior Indebtedness, do any one or more of the following: (a)
change the manner, place or terms of payment or extend the time of payment of, or renew, increase
(but not in excess of the cap provided for in the definition of “Senior Indebtedness”), alter or
amend, Senior Indebtedness or any instrument evidencing the same or any covenant or agreement under
which Senior Indebtedness is outstanding or secured or any liability of any obligor thereon; (b)
sell, exchange, release or otherwise deal with any property pledged, mortgaged or otherwise
securing Senior Indebtedness; (c) settle or compromise any Senior Indebtedness or any liability of
any obligor thereon or release any Person liable in any manner for the payment of Senior
Indebtedness; and (d) waive any default under Senior Indebtedness and exercise or refrain from
exercising any rights against the Company, any Subsidiary or any other Person. The foregoing
provisions are not intended to permit a change to the definition of “Senior Indebtedness”.

Section 2.12 Liens.

(a) All Liens granted by the Company, or, if applicable, any Guarantor, which at any time
secure the Note Agreement, any NPA Note or any other Note Security Document are hereby made, and
will at all times prior to the full payment or discharge of the Senior Indebtedness be subject and
subordinate to all Liens granted by the Company or any Guarantor which at any time secure the
Senior Indebtedness, which subordination shall be effective whether or not all such Liens securing
Senior Indebtedness have been properly recorded, filed and otherwise perfected prior to all such
Liens securing any NPA Note and regardless of the relative priority of such Liens as determined
without regard to this Article II. The mortgages included in the Bank Loan Documents do (and other
mortgages, security agreements and similar documents may) describe the indebtedness secured thereby
in a manner which might include indebtedness other than the Senior Indebtedness. For so long as
any NPA Note is outstanding, as between the Noteholders and the holders of the Senior Indebtedness,
only the Senior Indebtedness shall be deemed to be secured by any Liens granted under the Bank Loan
Documents.

(b) Each Noteholder agrees that it will not initiate, join in or prosecute any claim, action
or other proceeding challenging the validity or enforceability of the Senior Indebtedness or the
Liens securing the Senior Indebtedness.

(c) So long as this Agreement remains in effect, whether or not any Insolvency Proceeding has
been commenced by or against the Company or any Subsidiary, the parties hereto agree that the
Company shall not, and shall not permit any Subsidiary to:

 

13

 

(i) grant or permit any additional Liens on any asset or property to secure any Subordinated
Obligations unless it has granted or concurrently grants a Lien on such asset or property to secure
the Senior Indebtedness (it being understood that, to the extent that the foregoing provisions of
this Section 2.12(c)(i) are not complied with for any reason, the Noteholder Collateral Agent and
the Noteholders agree that any amounts received by or distributed to any of them pursuant to or as
a result of Liens granted in contravention of this Section 2.12(c)(i) shall be subject to the
penultimate sentence of Section 2.2); or

(ii) grant or permit any additional Liens on any asset or property to secure any Senior
Indebtedness unless it has granted or concurrently grants a Lien on such asset or property to
secure the Subordinated Obligations.

(d) The parties hereto agree that it is their intention that the collateral securing the
Senior Indebtedness and the Subordinated Obligations be identical. In furtherance of the
foregoing, the parties hereto agree, subject to the other provisions of this Agreement:

(i) upon request by the Senior Indebtedness Representative or the Noteholder Collateral Agent,
to cooperate in good faith (and to direct their counsel to cooperate in good faith) from time to
time in order to determine the specific items included in the collateral and the steps taken to
perfect their respective Liens thereon and the identity of the respective parties obligated under
the Bank Loan Documents and the Note Documents; and

(ii) that the documents and agreements creating or evidencing the collateral for the Senior
Indebtedness and the Subordinated Obligations shall be in all material respects the same forms of
documents other than with respect to the first lien and the second lien nature of the obligations
thereunder.

Section 2.13 Asset Sales. Each Noteholder agrees that it will not take any action
that would hinder any sale, transfer or other disposition of any property of the Company or any
Subsidiary so long as such sale or other disposition is made in compliance with Section 6.8 of the
Bank Agreement, as in effect on the Date of Closing.

Section 2.14 Purchase of Senior Indebtedness.

The Senior Indebtedness Representative, on behalf of itself and the Banks (and, where
appropriate with regard to the Eligible Swap Agreements, their respective Affiliates), and the
Company hereby agree with the Noteholders that, if the Senior Indebtedness Representative delivers
a Payment Default Notice to the Noteholders, then the Noteholders may (but shall not be obligated
to) purchase the Senior Indebtedness and all of the rights, titles and interests of the Senior
Indebtedness Representative and the Banks under the Bank Loan Documents, by giving notice of one or
more Noteholders’ intent to buy within ten days after delivery of such Payment Default Notice and
consummating such sale within thirty days after the delivery of such Payment Default Notice for a
price in immediately available funds equal to the unpaid principal of and accrued interest on the
Senior Indebtedness, the cash collateralization amount of outstanding letters of credit under the
Bank Loan Agreement at par value plus 5%, all other amounts then due to the Senior Indebtedness
Representative and the Banks under the Bank Loan Agreement and all unpaid amounts and Swap
Termination Value payments due to the Banks (and their respective
Affiliates, where appropriate) of the Eligible Swap Agreements, all subject to documentation
reasonably acceptable to the Senior Indebtedness Representative, the Banks and the Noteholders, but
without any necessity for any consent from the Company or any Guarantor.

 

14

 

ARTICLE III

MISCELLANEOUS

Section 3.1 No Partnership or Joint Venture. Nothing contained in this Agreement, and
no action taken by any party to this Agreement pursuant hereto, is intended to constitute or shall
be deemed to constitute the Noteholders and the Banks (or any of them) a partnership, association,
joint venture or other entity.

Section 3.2 Possessory Collateral. The Senior Indebtedness Representative agrees to
hold that part of the collateral that is in its possession or control (or in the possession or
control of its agents or bailees), to the extent that possession or control thereof is taken to
perfect a Lien thereon under the Uniform Commercial Code (such collateral being the “Pledged
Collateral”), as collateral agent for the holders of the Senior Indebtedness and as bailee for the
Noteholder Collateral Agent (such bailment being intended, among other things, to satisfy the
requirements of Sections 8-301(a)(2) and 9-313(c) of the Uniform Commercial Code) solely for the
purpose of perfecting the security interest granted under the Bank Loan Documents and the Note
Documents, respectively. The parties agree that the Senior Indebtedness Representative shall have
no fiduciary duties to the Noteholder Collateral Agent or the Noteholders with respect to the
Pledged Collateral and that its sole duty to the Noteholder Collateral Agent and the Noteholders
with respect to the Pledged Collateral shall be to use the same degree of care that it uses at the
time with respect to its holding of similar collateral for its own account.

Section 3.3 Notices; Identification of Lenders.

(a) Unless otherwise specified herein, all notices, requests and other communications to any
party hereunder (including, without limitation, those given to the Noteholder Collateral Agent
pursuant to Section 2.2 and Section 2.3) shall be in writing (including overnight delivery service,
facsimile copy or similar writing) and shall be given to such party at its address or facsimile
number specified on the signature pages hereof, or such other address or facsimile number as such
party may hereafter specify in writing for the purpose by notice to the other parties hereto. All
such notices and other communications shall, when mailed, delivered by overnight delivery service
or transmitted by facsimile, be effective when deposited in the mails, delivered to the overnight
delivery service or transmitted by facsimile with receipt confirmed and with a copy sent by mail or
overnight delivery service, respectively.

(b) Until notified otherwise in accordance with the provisions of this Section 3.3, each party
hereto shall be entitled to assume, for all purposes hereunder, that the name and address of each
other party hereto is as set forth for such other party on the signature pages hereto or to the
applicable Supplement hereto. Upon the request from time to time of the Senior Indebtedness
Representative, the Company shall provide to the Senior Indebtedness Representative, within five
Business Days after such request, a copy of the registry of Noteholders maintained by the Company
in accordance with the terms of the Note Agreement.

 

15

 

Section 3.4 Amendments and Waivers. Any provision of this Agreement may be amended or
waived if, and only if, such amendment or waiver is in writing and signed by (a) the Required
Noteholders, (b) the Senior Indebtedness Representative or the Required Banks, and (c) if the
rights or duties of the Noteholder Collateral Agent are affected thereby, the Noteholder Collateral
Agent.

Section 3.5 Counterparts. This Agreement may be signed in any number of counterparts,
each of which shall be an original, and all of which taken together shall constitute a single
agreement, with the same effect as if the signatures thereto were upon the same instrument.

Section 3.6 Benefits. This Agreement is solely for the benefit of and shall be
binding upon the parties hereto and their successors or assigns, and no other Person or entity
(other than the Company, but only to the extent expressly set forth herein) shall have any right,
benefit, priority or interest under or by reason of this Agreement. No Noteholder or Bank shall
assign its rights under the Note Documents or the Bank Loan Documents, as the case may be, without
causing the assignee of such rights to execute a joinder agreement in substantially the form of
Attachment A hereto (with appropriate revisions to such form in the case of an assignment
by a Bank). Each Noteholder acknowledges and agrees that the provisions of Article II are, and are
intended to be, an inducement and a consideration to each holder of the Senior Indebtedness to
make, extend and continue the credit constituting the Senior Indebtedness; and each holder of the
Senior Indebtedness shall be deemed conclusively to have relied upon the provisions of Article II
in permitting the Company and the Guarantors to incur the Subordinated Obligations and in making,
extending, continuing and/or acquiring such Senior Indebtedness.

Section 3.7 Term. This Agreement shall remain in effect until all Senior Indebtedness
is paid in full and no Bank shall have any commitment to lend or otherwise extend credit under the
Bank Loan Agreement and all letters of credit issued by any holder of Senior Indebtedness have
expired, terminated or become fully collateralized in cash.

Section 3.8 Governing Law. THIS AGREEMENT SHALL BE CONSTRUED AND ENFORCED IN
ACCORDANCE WITH, AND THE RIGHTS OF THE PARTIES SHALL BE GOVERNED BY, THE LAW OF THE STATE OF NEW
YORK EXCEPT THAT THE RIGHTS, DUTIES AND OBLIGATIONS OF ANY SUCCESSOR NOTEHOLDER COLLATERAL AGENT
HEREUNDER AS AN AGENT FOR THE NOTEHOLDERS SHALL BE GOVERNED BY THE LAW OF THE STATE IN WHICH SUCH
SUCCESSOR NOTEHOLDER COLLATERAL AGENT HAS ITS PRINCIPAL PLACE OF BUSINESS.

 

16

 

IN WITNESS WHEREOF, the parties hereto have caused this Agreement to be duly executed by their
respective officers hereunto duly authorized as of the date first above set forth.

	 	 	 	 	 
	 	 	NOTE HOLDERCOLLATERAL AGENT:
	 
	 	 	 	 
	 	 	THE BANK OF NEW YORK TRUST COMPANY, N.A.
	 
	 	 	 	 
	 

	 	By:
	 	/s/ Geraldine Creswell
	 

	 	 	 	 
	 

	 	Name:
	 	Geraldine Creswell
	 

	 	Title:
	 	Assistant Treasurer
	 
	 	 	 	 
	 

	 	Address:	 	 
	 
	 	 	 	 
	 	 	10161 Centurion Parkway

2nd Floor

Jacksonville, FL 32256

Fax No: (904) 645-1921

Attn: Corporate Trust

Ms. Geraldine Creswell

Assistant Treasurer
	 
	 	 	 	 
	 	 	BANK AGENT:
	 
	 	 	 	 
	 	 	CAPITAL ONE, NATIONAL ASSOCIATION
	 
	 	 	 	 
	 

	 	By:
	 	/s/ Eric Broussard
	 

	 	 	 	 
	 

	 	Name:
	 	Eric Broussard
	 

	 	Title:
	 	Senior Vice President
	 
	 

	 	Address:
	 	5718 Westheimer Rd. Suite 600
	 

	 	 	 	Houston, TX 77507
	 

	 	 	 	Tel: (713) 435-5278
	 

	 	 	 	Fax: (713) 435-5106

Signature Page to Intercreditor Agreement

 

 

 

	 	 	 	 	 
	 	 	BANKS:
	 
	 	 	 	 
	 	 	CAPITAL ONE, NATIONAL ASSOCIATION
	 
	 	 	 	 
	 

	 	By:
	 	/s/ Eric Broussard
	 

	 	 	 	 
	 

	 	Name:
	 	Eric Broussard
	 

	 	Title:
	 	Senior Vice President
	 
	 	 	 	 
	 

	 	Address:
	 	5718 Westheimer Rd, Suite 600
	 

	 	 	 	Houston, TX 77057
	 

	 	 	 	Tel: (713) 5278
	 

	 	 	 	Fax: (713) 5106
	 
	 	 	 	 
	 	 	UNION BANK OF CALIFORNIA, N.A.
	 
	 	 	 	 
	 

	 	By:
	 	/s/ Randell L. Osterberg
	 

	 	 	 	 
	 

	 	Name:
	 	Randell L. Osterberg
	 

	 	Title:
	 	Sr. Vice President – US Marketing Manager
	 
	 

	 	Address:	 	 

Signature Page to Intercreditor Agreement

 

 

 

	 	 	 	 	 
	 	 	NOTEHOLDERS:
	 
	 	 	 	 
	 	 	THE PRUDENTIAL INSURANCE COMPANY OF AMERICA
	 
	 	 	 	 
	 

	 	By:
	 	/s/ Kelly Brendel
	 

	 	 	 	 
	 

	 	 	 	Vice President
	 
	 	 	 	 
	 	 	Address:
	 
	 	 	 	 
	 	 	c/o Prudential Capital Group

2200 Ross Avenue, Suite 4200E

Dallas, Texas 75201

Fax No: (214) 720-6299

Attention: Managing Director

Signature Page to Intercreditor Agreement

 

 

 

	 	 	 	 	 	 	 
	CONSENTED AND AGREED TO AS OF 

THE DATE FIRST ABOVE WRITTEN:	 	 	 	 
	 
	 	 	 	 	 	 
	GMX RESOURCES INC.	 	 	 	 
	 
	 	 	 	 	 	 
	By:

	 	/s/ Ken L. Kenworthy, Sr.
 

	 	 	 	 
	Name:

	 	Ken L. Kenworthy, Sr.	 	 	 	 
	Title:

	 	CFO	 	 	 	 
	 
	 	 	 	 	 	 
	Address:
	 	 	 	 	 	 
	 
	 	 	 	 	 	 
	9400 N. Broadway, Suite 600

Oklahoma City, Oklahoma 73114

Attention: Ken Kenworthy, Sr.	 	 	 	 
	 
	 	 	 	 	 	 
	ENDEAVOR PIPELINE INC.	 	 	 	 
	 
	 	 	 	 	 	 
	By:

	 	/s/ Ken L. Kenworthy, Sr.	 	 	 	 
	 

	 	 	 	 	 	 
	Name:

	 	Ken Kenworthy, Sr.	 	 	 	 
	Title:

	 	CEO	 	 	 	 
	 
	 	 	 	 	 	 
	Address:

	 	9400 N. Broadway, Suite 600	 	 	 	 
	 

	 	Oklahoma City, OK 73114	 	 	 	 
	 
	 	 	 	 	 	 
	DIAMOND BLUE DRILLING CO.	 	 	 	 
	 
	 	 	 	 	 	 
	By:

	 	/s/ Rick Hart	 	 	 	 
	 

	 	 	 	 	 	 
	Name:

	 	Rick Hart	 	 	 	 
	Title:

	 	President	 	 	 	 
	 
	 	 	 	 	 	 
	Address:

	 	9400 N. Broadway, Suite 600	 	 	 	 
	 

	 	Oklahoma City, OK 73114	 	 	 	 

Signature Page to Intercreditor Agreement

 

 

 

Attachment A

SUPPLEMENT TO INTERCREDITOR AGREEMENT

[Date]

Re: GMX Resources Inc. Intercreditor Agreement dated as of July 31, 2007 (as amended,
restated, supplemented or otherwise modified from time to time, the “Intercreditor Agreement”;
capitalized terms used herein and not otherwise defined herein shall have the meaning provided in
the Intercreditor Agreement).

Ladies and Gentlemen:

We acknowledge that we have received a copy of the Intercreditor Agreement and that we agree
to be bound by the terms and conditions set forth in the Intercreditor Agreement and to be
obligated thereunder as if we were an original signatory thereto.

We hereby advise you of the following administrative details:

Address:

Facsimile:

Telephone:

IN WITNESS WHEREOF, the undersigned has caused this Supplement to be duly executed by its
proper officer hereunto duly authorized.

	 	 	 	 	 
	 	 	[NEW NOTEHOLDER]
	 
	 	 	 	 
	 

	 	By:	 	 
	 

	 	 	 	 
	 

	 	Name:	 	 
	 

	 	Title

Source: [{"source": "alea-institute/alea-institute/kl3m-data-edgar-agreements/train-00127-of-00352.parquet"}, [{"source": "alea-institute/alea-institute/kl3m-data-edgar-agreements/train-00127-of-00352.parquet"}]]