SemCanada's Purchase of Central Alberta Midstream Complete

Tulsa, OK - SemCanada, L.P., a wholly owned subsidiary of SemGroup, L.P., announced today the completion of its acquisition of Central Alberta Midstream (Central) from BP Canada Energy Company and Chevron Canada Resources, Canadian subsidiary of ChevronTexaco Corp. The purchase price was not disclosed. The definitive purchase and sale agreement was previously announced January 20, 2005.

Based in Calgary, Alberta, Central’s assets include four gas processing plants and more than 600 miles of natural gas gathering pipeline in Alberta. The company employs an office and field staff of about 260. Central provides an integrated gathering and processing service with several options for wet or dry, sweet or sour gas gathering and processing, as well as dehydration, field compression, liquid recovery and sulfur forming and handling.

SemGroup, L.P. is a midstream service company providing the energy industry means to move products from the wellhead to the wholesale marketplace. It is ranked #14 on Forbes magazine’s list of America’s Largest Private Companies. SemCanada’s businesses include Seminole Canada Gas and Seminole Canada Energy. For additional information, visit www.semgrouplp.com.

BP Canada Energy Company is Canada’s leading natural gas value chain company. We primarily explore for, develop, produce, process, market and trade natural gas and its derivatives. We are also leading oil and aviation production marketers, and are Canada’s leading lubricants brand. Headquartered in Calgary, Alberta, our businesses employ over 1400 Canadians. For more information, visit www.bp.com.

Chevron Canada Resources is focused on an aggressive exploration plan and production activities in Atlantic Canada, the Mackenzie Delta and Alberta’s oil sands. ChevronTexaco Corporation is one of the world’s leading energy companies. With more than 47,000 employees, ChevronTexaco conducts business in approximately 180 countries around the world, producing and transporting crude oil and natural gas, and refining, marketing and distributing fuels and other energy products. ChevronTexaco is based in San Ramon, Calif. More information on ChevronTexaco is available at www.chevrontexaco.com.

Contacts:
SemGroup, L.P.: Frank Panzer (918) 388-8109
BP Energy Company: Alexandra Wright (4013) 650-4530
Chevron Texaco: Ted Spearing
Chevron Canada Resources: (403) 234-5184
The Carlyle Group: Chris W. Ullman (202) 729-5399

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