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Figure 1 – Macondo Well Pore Pressure Fracture Gradient Plot
As seen in Figure 2, the formation integrity test at the 9‐7/8 inch liner shoe
located at 17,168 feet yielded results of 15.98 ppg (as identified in the IADC daily
reports, which are completed by the rig crew to document daily operations) and
16.22 ppg (identified in BP’s Daily Operation Report). The Panel found that this
integrity test may have created uncertainty because (1) it was 1.0 ppg higher than
anticipated and (2) there was a possibility that the test results did not reflect a
true test of the formation below the 9‐7/8 inch liner shoe. Although this fracture
gradient test was questionable, BP chose not to retest the fracture gradient at the
shoe and decided to drill ahead. After drilling the M57C sand interval, BP
65 API 608174116901, March 26 APD (Revised Bypass) for the Macondo Well.
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