Shell Offshore and its partner Nexen have completed the drilling of additional appraisal wells for their Appomattox Field discovery in the deepwater sector of the eastern US Gulf of Mexico.
Nexen said today that based on the two appraisal sidetracks and the discovery well itself, the partners have estimated the recoverable contingent resource exceeds 250 million boe with upside potential. It said that once drilling resumes in the Gulf of Mexico, further appraisal wells are to be drilled to determine ultimate reserves and move towards development plans which potentially include a new hub.
The Appomattox discovery was made in waters 2,200 meters (7,217 ft) in depth in Mississippi Canyon Blocks 391 and 392, with the discovery well in Block 392 drilled with Transocean's Deepwater Nautilus semisubmersible drilling rig to a total depth of 7,643 meters (25,077 ft) to encounter approximately 162 meters (530 ft) of oil pay. The appraisal sidetrack was then drilled to 7,910 meters (25,950 ft) and encountered another 116 meters (380 ft) of oil pay.
Shell is the operator of Mississippi Canyon Blocks 391 and 392 and the Appomattox discovery well with 80% working interest in partnership with Nexen, which holds the remaining 20%. The partners are currently investigating development options for the discovery.
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