Exhibit 10.20

 

FIRST AMENDMENT

TO THE

PLAINS EXPLORATION & PRODUCTION COMPANY

LONG-TERM RETENTION AGREEMENT

 

WHEREAS, Plains Exploration & Production Company (the “Company”) and
                     (“Executive”) entered into the Plains Exploration &
Production Company Long-Term Retention Agreement (the “Agreement”) dated
effective as of the 10th day of February, 2006 (the “Effective Date”); and

 

WHEREAS, the Company and Executive have agreed to amend the Agreement as set
forth below;

 

NOW, THEREFORE, effective as of the Effective Date, the parties hereto agree as
follows:

 

1. The following sentence shall be added to paragraph 4 of the Agreement:

 

“The amount so credited to Executive’s Account shall then be contributed by the
Company in cash, Common Stock or other property to the Trust created under the
Plan to be held by the trustee of such Trust until paid according to the terms
of this Agreement, to Executive.”

 

2. The words “a Deferral Election or” shall be stricken from the first sentence
of paragraph 5 of the Agreement.

 

3. The first sentence of paragraph 6 of the Agreement shall be deleted.

 

4. As modified herein, the Agreement is hereby ratified and affirmed in all
respects.

 

IN WITNESS WHEREOF, the parties hereto have signed this to be effective set
forth above.

 

PLAINS EXPLORATION & PRODUCTION COMPANY         By:  

 

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  Date:                              Name:  

 

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        Title:  

 

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        Executive         By:  

 

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  Date: