Downhole power unit overcomes HPHT problem ///

The Tahiti project in the GOM is developed in a deep, high-pressure reservoir that produces some unique challenges, Fig. 1. Chevron is the project’s operator with a 58% working interest along with partners Statoil (25%) and Total (17%). Tahiti is about 100 mi south of Louisiana in 4,100 ft of water with the main pay at about 26,000-ft subsea. Chevron had successfully completed a test well in this area, and at that time, it was the deepest successful well test run in the GOM. The BHP at Tahiti is about 20,000 psi, and the wells are capable of making 25,000 bopd. The partners wanted to find an alternative to the traditional jointed tubing-conveyed, hydrostatic setting of sump packers in these deep wells and approached Halliburton with the problem. Typically, setting a sump packer at about 25,000 ft with these tools can take 48 hr of rig time.

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