**Exhibit 4.7**

**SIXTH SUPPLEMENTAL INDENTURE**

This Sixth Supplemental Indenture, dated as of February 13, 2008(this “***Supplemental Indenture***”), among Pogo Partners, Inc., a Texas corporation (“***Pogo Partners***”), Pogo Producing (San Juan) Company, a Texas corporation (“***Pogo San Juan***”, andtogether with Pogo Partners, the “***New Subsidiary Guarantors***”), Plains Exploration & Production Company, a Delaware corporation (together with its successors and assigns, the “***Company***”), theexisting subsidiary guarantors party hereto (the “***Guarantors***”), and Wells Fargo Bank, N.A., a nationally chartered association, as Trustee (the “***Trustee***”) under the Indenture referred to below.

W I T N E S S E T H: 

WHEREAS, the Company, the Guarantors and the Trustee have heretofore executed and delivered an Indenture (as amended, supplemented, waived or otherwise modified through the date hereof, the “***Indenture***”), dated as ofMarch 13, 2007, as supplemented by a First Supplemental Indenture, dated as of March 13, 2007, providing for the issuance of 7% Senior Notes due 2017 of the Company (the “***7% Notes***”), by a Second SupplementalIndenture, dated as of June 5, 2007, providing for the addition of certain subsidiary guarantors, by a Third Supplemental Indenture, dated as of June 19, 2007, providing for the issuance of 7 3/4% Senior Notes due 2015 (the “***73/4% Notes***” and, together with the 7% Notes, the “***Notes***”), by a Fourth Supplemental Indenture, dated as of November 14, 2007, providing for the addition of an additional subsidiary guarantor, and by a FifthSupplemental Indenture, dated as of January 29, 2008, providing for the addition of certain subsidiary guarantors; 

WHEREAS, Section 10.17 of the Indenture provides that if any Domestic RestrictedSubsidiary that is not a Guarantor is or becomes obligated under any Indebtedness pursuant to a Guarantee of Indebtedness of the Company or any Guarantor (other than the Notes), and the maximum principal amount of Indebtedness of such DomesticRestricted Subsidiary under such Guarantee exceeds $10.0 million, the Company shall cause that Domestic Restricted Subsidiary to Guarantee the Notes and become a Guarantor, pursuant to the Subsidiary Guarantee provisions of the Indenture, byexecuting a supplemental indenture and delivering it to the Trustee within 30 days after the date on which such Domestic Restricted Subsidiary Guaranteed such Indebtedness of the Company or a Guarantor; *provided*, *however*, that theCompany shall not be required to cause such Domestic Restricted Subsidiary to so Guarantee the Notes and become a Guarantor prior to the 180th dayafter the consummation of any transaction (including without limitation any merger, consolidation or purchase) pursuant to which such Domestic Restricted Subsidiary becomes a Subsidiary of the Company; and 

WHEREAS, pursuant to Section 9.1 of the Indenture, the Trustee, the Guarantors and the Company are authorized to execute and deliver thisSupplemental Indenture to amend the Indenture, without the consent of any holder of the Notes. 

NOW, THEREFORE, in consideration of theforegoing and for other good and valuable consideration, the receipt of which is hereby acknowledged, the New Subsidiary Guarantors, the Company, the Guarantors and the Trustee mutually covenant and agree for the equal and ratable benefit of theHolders of the Notes as follows: 

 

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ARTICLE I 

Definitions

SECTION 1.1 Defined Terms. As used in this Supplemental Indenture,capitalized terms used, but not otherwise defined herein are used herein as defined in the Indenture. The words “***herein***,” “***hereof***” and “***hereby***” and other words of similar importused in this Supplemental Indenture refer to this Supplemental Indenture as a whole and not to any particular section hereof. 

ARTICLE II

Agreement to be Bound

SECTION 2.1 Agreement to be Bound. Each of the New Subsidiary Guarantors hereby becomes a party to the Indenture as a Guarantor and as such will have all of the rights and be subject to all of the obligations and agreements of aGuarantor under the Indenture. Each New Subsidiary Guarantor agrees to be bound by all of the provisions of the Indenture applicable to a Guarantor and to perform all of the obligations and agreements of a Guarantor under the Indenture. 

ARTICLE III 

Miscellaneous

SECTION 3.1 Parties. Nothing expressed or mentioned herein is intended or shall be construed to give any Person, firm orcorporation, other than the Holders and the Trustee, any legal or equitable right, remedy or claim under or in respect of this Supplemental Indenture or the Indenture or any provision herein or therein contained. 

SECTION 3.2 Governing Law. This Supplemental Indenture shall be governed by, and construed in accordance with, the laws of the State of NewYork. 

SECTION 3.3 Severability Clause. In case any provision in this Supplemental Indenture shall be invalid, illegal orunenforceable, the validity, legality and enforceability of the remaining provisions shall not in any way be affected or impaired thereby and such provision shall be ineffective only to the extent of such invalidity, illegality or unenforceability.

SECTION 3.4 Ratification of Indenture; Supplemental Indentures Part of Indenture. Except as expressly amended hereby, theIndenture is in all respects ratified and confirmed and all the terms, conditions and provisions thereof shall remain in full force and 

 

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effect. This Supplemental Indenture shall form a part of the Indenture for all purposes with respect to the Notes, and every Holder of Notes heretofore orhereafter authenticated and delivered shall be bound hereby. The Trustee makes no representation or warranty as to the validity or sufficiency of this Supplemental Indenture. 

SECTION 3.5 Counterparts. The parties hereto may sign one or more copies of this Supplemental Indenture in counterparts, all of whichtogether shall constitute one and the same agreement. 

SECTION 3.6 Headings. The headings of the Articles and the sections inthis Supplemental Indenture are for convenience of reference only and shall not be deemed to alter or affect the meaning or interpretation of any provisions hereof. 

**[SIGNATURE PAGE FOLLOWS]**

 

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IN WITNESS WHEREOF, the parties hereto have caused this Sixth Supplemental Indenture to be duly executedas of the date first above written. 

 
**THE COMPANY:**PLAINS EXPLORATION & PRODUCTION COMPANYBy: /s/ Winston M. TalbertName: Winston M. TalbertTitle: 
Executive Vice President & Chief

FinancialOfficer

Sixth Supplemental Indenture Signature Page 

**THE GUARANTORS:**
ARGUELLO INC.

BROWN PXP PROPERTIES,LLC

LARAMIE LAND & CATTLE COMPANY, LLC
 By: PXP Piceance LLC, its sole member By: Plains Resources Inc., its sole member
LATIGO GAS GROUP, LLC

LATIGO GAS HOLDINGS,LLC

LATIGO HOLDINGS (TEXAS), LLC

LATIGO INVESTMENTS,LLC

LATIGO GAS SERVICES, LP
 By: Latigo Gas Group, LLC, its general partner
LATIGO PETROLEUM, INC.

LATIGO PETROLEUMTEXAS, LP
 By: Latigo Investments, LLC, its general partner
NUEVO GHANA INC.

NUEVO INTERNATIONAL INC.

NUEVO OFFSHORE COMPANY

NUEVO RESOURCES INC.

PACIFIC INTERSTATE OFFSHORE COMPANY

PLAINS ACQUISITION CORPORATION

PLAINS LOUISIANA INC.

PLAINS RESOURCES INC.

PLAINS RESOURCES INTERNATIONAL INC.

POGO ENERGY, INC.

POGO PANHANDLE 2004, L.P.
 By: Pogo Energy, Inc., its general partner
POGO PRODUCING (TEXAS PANHANDLE) COMPANY

POGO PRODUCING COMPANY LLC

PXP BRUSH CREEK LLC
 By: Plains Resources Inc., its sole memberPXP CV PIPELINE LLC By: Plains Resources Inc., its sole memberPXP EAST PLATEAU LLC By: Plains Resources Inc., its sole member
PXP GULF COAST INC.

PXP HELL’S GULCHLLC
 By: Plains Resources Inc., its sole memberPXP LOUISIANA L.L.C. By: Plains Louisiana Inc., its sole member
PXP PERMIAN INC.

PXP PICEANCELLC
 By: Plains Resources Inc., its sole memberPXP TEXAS INC.
Sixth Supplemental Indenture Signature Page 

PXP TEXAS LIMITED PARTNERSHIP By: PXP Texas Inc., its general partnerBy: /s/ Winston M. TalbertName: Winston M. TalbertTitle: Vice President & Treasurer
PXP AIRCRAFT LLC

PXP DEEPWATERL.L.C.
 By: 
Plains Exploration & Production Company,

its sole member
By: /s/ Winston M. TalbertName: Winston M. TalbertTitle: 
Executive Vice President & Chief

Financial Officer

Sixth Supplemental Indenture Signature Page 

**THE NEW SUBSIDIARY GUARANTORS**:****
POGO PARTNERS, INC.

POGO PRODUCING (SANJUAN) COMPANY
By: /s/ Winston M. TalbertName: Winston M. TalbertTitle: Vice President & Treasurer
Sixth Supplemental Indenture Signature Page 

**THE TRUSTEE:**WELLS FARGO BANK, N.A.By: /s/ Patrick GiordanoName: Patrick GiordanoTitle: Vice President
Sixth Supplemental Indenture Signature Page