WES
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Western Gas Partners, LP Increases Distribution and Schedules Earnings Conference Call

HOUSTON–(BUSINESS WIRE)–Oct. 11, 2012– Western Gas Partners, LP (NYSE: WES) announced today that the board of directors of its general partner has declared a cash distribution of $0.50 per unit for the third quarter of 2012, representing a 4-percent increase over the prior quarter and a 19-percent increase over the third quarter of 2011. The distribution is payable on November 13, 2012, to unitholders of record at the close of business on October 31, 2012.

The Partnership plans to report its third-quarter 2012 results after the market closes on Wednesday, October 31, 2012. Management will host a conference call on Thursday, November 1, 2012, at 11 a.m. CDT (12 p.m. EDT) to discuss quarterly results.

The full text of the release announcing the results will be available on the Partnership’s web site atwww.westerngas.com. To access the live audio webcast of the conference call, please visit the investor relations section of the web site. To participate via telephone, please dial 877.621.4819 and enter participant code 37619281. Please call in 10 minutes prior to the scheduled start time. A replay of the call will be available on the web site for two weeks following the conference call.

Western Gas Partners, LP is a growth-oriented Delaware master limited partnership formed byAnadarko Petroleum Corporation (NYSE: APC) to own, operate, acquire and develop midstream energy assets. With midstream assets in East, West and South Texas, the Rocky Mountains and the Mid-Continent, the Partnership is engaged in the business of gathering, processing, compressing, treating, and transporting natural gas, condensate, natural gas liquids and crude oil for Anadarko and other producers and customers. For more information about Western Gas Partners, please visitwww.westerngas.com.

Note to Non-United States Investors: This release is intended to be a qualified notice under Treasury Regulation Section 1.1446-4(b). Brokers and nominees should treat one hundred percent (100.0%) ofWestern Gas Partners, LP’s distributions to foreign investors as being attributable to income that is effectively connected with a United States trade or business. Accordingly, Western Gas Partners, LP’sdistributions to foreign investors are subject to federal income tax withholding at the highest applicable effective tax rate.

Source: Western Gas Partners, LP

Western Gas Partners, LP

Benjamin Fink, CFA

SVP, Chief Financial Officer and Treasurer

[email protected]

832.636.6010

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