Subsea trees set in Mandy development

By OGJ editors
HOUSTON, Mar. 16
-- Two subsea trees have been installed in 2,460 ft of water in preparation for production start later this year at LLOG Exploration Co. LLC’s Mandy oil development on Mississippi Canyon Block 199 off Louisiana.

LLOG made the Pliocene discovery in January 2010 in a well that encountered more than 120 net ft of oil pay. A second well found net oil pay of more than 100 ft in a separate fault block (OGJ, Mar. 8, 2010, Newsletter).

LLOG is completing both wells for tieback via a subsea manifold to the Matterhorn tension-leg platform production system on Mississippi Canyon Block 243. It expects to drill and tie in a third well.

InterMoor installed the trees, each weighing 45 tons, using Shell’s Heave Compensated Loading System and the anchor-handling vessel Joshua Chouest. It installed both trees in less than 34 hr.

Private LLOG, operator with a 50% interest, hasn’t reported production rates. Its partner is Apache Corp., which originally held a 15% interest and gained a 35% stake via merger with Mariner Energy Inc.

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