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Unformatted text preview: burton developed at least 30 to 40 models for the cement to be used with the Macondo production casing. 97 In developing these models, BP and Halliburton frequently changed assumptions about the casing string and number of centralizers to be used. For example, Halliburton generated an OptiCem model on April 15 at 3:30 p.m., which showed that channeling could result if only ten centralizers were installed in the well. The model called for ten centralizers to be installed between 18,300 feet and 17,811 feet measured depth, using approximately 45‐foot spacing and an approximate 80% standoff. 98 The resulting gas flow potential (“GFP”) was moderate at a reservoir zone of 18,200 feet measured depth. Later on April 15, Halliburton ran a second model using 21 centralizers installed between 18,300 feet and 17,400 feet measured depth, using 45‐foot spacing with a 70% top of centralized interval standoff. This model predicted that channeling would not occur; the resulting gas flow potential was minor. Based on this report, BP ordered 15 additional centralizers to supplement the six centralizers a...
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