September 2019, Vol. 246, No. 9

Global News

Williams Begins Service on Deepwater Gulf Gathering Pipeline System

Williams acquired and placed into service the 16-inch Norphlet deepwater gathering pipeline system in the U.S. Gulf of Mexico constructed by operator Shell and CNOOC Petroleum Offshore.

The acquisition extends the reach of the Williams pipeline network by connecting Williams’ existing Transco offshore pipeline lateral to the prolific Jurassic play developed by Shell and CNOOC in the eastern Gulf of Mexico. First gas delivery date occurred on June 22.

At a depth of 7,400 feet, the system extends 54 miles from the Shell-operated Appomattox Floating Production System to the Transco Main Pass 261A junction platform, located 60 miles south of Mobile, Ala.

The Norphlet deepwater gas gathering pipeline system, which is capable of gathering an estimated 261 to 291 million MMcf/d of natural gas, connects more than 33,000 acres of dedicated leases to Williams’ Mobile Bay processing facility via the Transco lateral at the Main Pass 261A junction platform. 

The completed project also included the installation of a spare subsea connector for additional floating production system volumes, as well as modifications to Williams’ Mobile Bay processing facility including a 118% expansion to the slug handling capacity and a 329% increase in stabilizing capacity. P&GJ

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