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Unformatted text preview: d Planning Decision Tree, April 14, 2010. (BP‐HZN‐
MBI00010575) (Appendix L). 148 Guide testimony, July 22,, 2010, at 43‐44. 149 BP ETP GP 10‐60 Zonal Isolation Requirements During Drilling Operations and Well Abandonment and Suspension (BP‐HZN‐MBI00193549). 146 59 identify lift pressure or lost returns to be proven techniques for evaluating a cement job. 150 Thus, Hafle’s decision tree on whether to direct the Schlumberger crew to run the cement evaluation log was inconsistent with BP’s own guidelines. Schlumberger told the Panel that it is uncommon but not unheard of for operators to cancel ordered services, such as cement evaluation logs, after the crew arrives at the facility. Schlumberger reviewed deepwater statistics for a 30‐
month period and found that Schlumberger actually performed 71 of the 74 cement evaluations originally ordered by operators during that period. Since the Panel concluded that the cement in annulus did not fail, it found that BP’s decision to not perform a cement evaluation log was not a cause in the we...
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