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Unformatted text preview: reasing the likelihood of additional lost returns and potential for fracturing. BP engineers proposed to set the top of the cement in the annulus at about 17,300 feet total depth, which was approximately 500 feet above the uppermost hydrocarbon zone. 90 MMS regulations required the cemented annular space in a production casing job to be 500 feet above the uppermost hydrocarbon zone. 91 On August 1, 2011, Oilfield Testing and Consulting (“OTC”) completed a forensic analysis of the cement samples mixed to replicate the cement slurries that were pumped into the Macondo well. OTC’s analysis revealed a range of potential cement setting times for the foamed and unfoamed cement. Several of the samples tested revealed setting times greater than 18 hours (the time period between the completion of the cement job and the start of the negative tests). See OTC Report at page 30. The Panel, however, found that there was strong evidence that the cement had set prior to the time the rig crew performed the negative test. See http://www.oilspillcommission.gov/sites/default/files/documents/Chevron%20letter%2...
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