Rate of Oil Leak, Still Not Clear, Puts Doubt on BPOn Monday, BP said a cap was capturing 11,000 barrels of oil a day from the well. The official government estimate of the flow rate is 12,000 to 19,000 barrels a day, which means the new device should be capturing the bulk of the oil.
But is it? With no consensus among experts on how much oil is pouring from the wellhead, it is difficult — if not impossible — to assess the containment cap’s effectiveness. BP has stopped trying to calculate a flow rate on its own, referring all questions on that subject to the government. The company’s liability will ultimately be determined in part by how many barrels of oil are spilled.
The immense undersea gusher of oil and gas, seen on live video feed, looks as big as it did last week, if not bigger, before the company sliced through the pipe known as a riser to install its new collection device.
At least one expert, Ira Leifer, who is part of a government team charged with estimating the flow rate, is convinced that the operation has made the leak worse, perhaps far worse than the 20 percent increase that government officials warned might occur when the riser was cut.
Dr. Leifer said in an interview on Monday that judging from the video, cutting the pipe might have led to a several-fold increase in the flow rate from the well.
“The well pipe clearly is fluxing way more than it did before,” said Dr. Leifer, a researcher at the University of California, Santa Barbara. “By way more, I don’t mean 20 percent, I mean multiple factors.” snip
Speaking at a briefing in Houston on Monday, Kent Wells, a BP executive involved in the containment effort, declined to estimate the total flow and how much it might have increased. He said that video images from the wellhead showed a “curtain of oil” leaking from under the cap.
“How much that is, we’d all love to know,” Mr. Wells said. “It’s really difficult to tell.”
He said that more than 27,000 barrels of oil had been collected, and that engineers were working to optimize the collection rate.
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Some scientists involved in the Flow Rate Technical Group say that they would like to produce a better estimate, but that they are frustrated by what they view as stonewalling on BP’s part, including tardiness in producing high-resolution video that could be subjected to computer analysis, as well as the company’s reluctance to permit a direct measurement of the flow rate. They said the installation of the new device and the rising flow of oil to the surface had only reinforced their conviction that they did not have enough information.
“It’s apparent that BP is playing games with us, presumably under the advice of their legal team,” Dr. Leifer said. “It’s six weeks that it’s been dumping into the gulf, and still no measurements.” http://www.nytimes.com/2010/06/08/us/08flow.html?pagewanted=all
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