MIGC, INC. POTENTIAL MERGERS

On Monday, October 15, 2007, Anadarko Petroleum Corporation ("Anadarko"), MIGC, Inc.'s 
ultimate parent company, announced that its wholly owned subsidiary, Western Gas Partners, LP
("WGP"), has filed a registration statement on Form S-1 with the U.S. Securities and 
Exchange Commission (SEC) relating to the proposed initial public offering of 18,750,000 
common units representing limited partner interests, along with up to an additional 2,812,500 
common units that may be purchased at the option of the underwriter.  The press release 
outlining this transaction is available at 
www.anadarko.com/investor_relations/news_release_detail.asp?id=1062737.  

As part of this transaction, MIGC, Inc. would become a wholly owned subsidiary of WGP.

Addresses for Anadarko and its affiliates are located at 
www.anadarko.com/people_places/office_locations.asp and at www.anadarko.com/midstream/about.asp.
General information regarding Anadarko and these transactions can be found at www.anadarko.com.