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Unformatted text preview: anomalies. 28 BP‐HZN‐MBI‐00125958; BP‐HZN‐MBI‐0019553; BP‐MB‐HZN‐00192599. 23 24 19 Despite these problems, by April 14, the Deepwater Horizon crew successfully drilled to the M “56” sand, one of the hydrocarbon‐bearing zones that BP geologists and engineers had targeted for the well. 29 Although the original well plan was to drill approximately 1,800 additional feet, the BP drilling team in Houston opted to stop drilling the well at a total depth of 18,360 feet because BP believed the well had reached the base of the target reservoir and that it had run out of drilling margin. 30 In other words, BP concluded that it could no longer safely drill into the formation without creating an underbalanced well (if the mud was too light) or risking fracturing the formation and threatening well integrity (if the mud was too heavy). BP planned to run production casing and temporarily abandon Macondo by sealing it with a surface cement plug so that another rig could return to the well later and take the steps necessary to complete the well for production. On April 19, the...
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This note was uploaded on 01/18/2014 for the course BEPP 305 taught by Professor Nini during the Fall '11 term at UPenn.

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