Magnolia field's trapped annulus pressure solved

Multiple solutions overcame a serious problem in the GOM deepwater development. ConocoPhillips is developing the Magnolia field at Garden Banks block 783 in the Gulf of Mexico with a Tension Leg Platform (TLP) in 4,674 ft of water. The field features six oil wells with rates as high as 25,000 bpd and two gas condensate wells with peak rates of 75MMcfd and 15,000 bpd. The wells are completed with dry trees. Magnolia’s wells were pre-drilled in 2002 and 2003.1,2 After installing the TLP in August 2004, a 2,000 hp platform rig, MODS 201, was installed to complete eight wells. The last and eighth well required drilling the production interval to total depth (TD). Following installation of the platform rig, two 11.75 in. OD production risers were installed. The first two wells were then completed to begin production. The remaining six production risers were run in a batch program, followed by completing the remaining pre-drilled wells.

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