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Unformatted text preview: ted sand‐shale interface at 18,304 feet measured depth, instead of at a consolidated shale strata. Placement of the shoe in a laminated sand‐shale zone increased the likelihood of channeling or cement contamination. The decision to set the production casing in a laminated sand‐shale zone in the vicinity of a hydrocarbon interval was a contributing cause of the blowout. 68 The mud losses of approximately 15,500 bbls during drilling at Macondo indicated that BP should have taken additional precautions during the production casing cementing operation. With the known losses experienced in the well, BP’s failure to take additional precautions, such as establishing additional barriers during cementing, was a contributing cause of the blowout. As discussed above, API RP 65 contains recommended practices regarding cementing operations that, at the time of the Macondo blowout, were used by many operators drilling wells in deepwater in the Gulf of Mexico. Some of the steps that BP took during the cementing of the Macondo...
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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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