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"Yet it became clear on August 25 that in fact there were 80 barrels of fluid loss during the cementing," Mr. Zoback said. "So all of this kind of comes together in way that would suggest that...hydraulic fracturing occurred at the time of cementing. If that in fact happened, it would propagate through the analysis in a number of different ways."
BP said that it conducted a "detailed analysis of the [fluid] losses during the cement job" and that it calculated up to three barrels of losses.
"Why did you proceed?" Donald Winter, the chairman of the National Academy of Engineering