BP to proceed with relief well after tests
By Chris Baltimore
Fri Aug 13, 2010 5:23pm EDT
HOUSTON (Reuters) - BP Plc will proceed with a relief well to kill its blown-out Gulf of Mexico well, the top U.S. spill official said on Friday.
"Everybody is in agreement that we need to proceed with the relief well," retired Coast Guard Admiral Thad Allen said. "The question is how to do it."
The decision to continue with the relief well came as Alabama announced it was suing BP for the "catastrophic harm" that the spill had caused the state.
Earlier this week Allen had raised the possibility that the relief well might not be necessary because the cement poured into the top of the blown Macondo well last week -- the so-called "static kill" -- might have permanently killed it.
But after running pressure tests, BP and U.S. officials agree that the relief well is needed to plug the well 13,000 feet beneath the seabed, Allen said. The relief well is only about 45 feet from reaching the Macondo well.
"The relief well will be finished," Allen said. "We will kill the well."
The Macondo well, a mile down in the Gulf of Mexico, blew out April 20 and began spewing oil in what has become the worst offshore oilspill in history.
The well was provisionally capped on July 15 after spewing an estimated 4.9 million barrels of oil into the Gulf, soiling marshlands, fisheries and tourist beaches along several hundreds of miles (kilometers) of the Gulf Coast.
The British energy giant has lost more than a third of its market value since the explosion and has set aside $32.2 billion to deal with clean-up costs.
BP faces hundreds of civil lawsuits from injured rig workers, fishermen, investors and property owners seeking to recoup losses. Alabama added to that pile by with its suit against BP and other companies for what Attorney General Troy King said was "catastrophic harm.
"We are suing them for the amount it will take to make Alabama whole," King said.
"WANTON FAILURE"
The suit, which did not set a damage figure, accuses the defendants of "negligent or wanton failure to adhere to recognized industry standards of care."
The spill has hurt fishing and tourism around the Gulf and has affected other sectors such as housing. People and businesses that have sustained losses can make claims against the BP compensation fund administered by Kenneth Feinberg, named by the White House as an independent overseer.
But King said Feinberg was undermining efforts by Gulf state attorneys general to make it possible for spill victims to claim damages from the fund while retaining the right to sue BP at a future date.
U.S. President Barack Obama, who has faced criticism for being slow to act in the face of the world's worst offshore oil spill, will vacation in Panama City, Florida, this weekend and make a public statement on the recovery effort on Saturday.
In Louisiana, the state hit hardest by the spill, U.S. and BP officials met with parish presidents and Gov. Bobby Jindal to discuss long-term recovery plans.
The U.S. government will enact an ocean monitoring system to detect underwater plumes of oil that could be harming undersea ecosystems, Allen said.
Meanwhile, top-level BP and U.S. officials including Energy Secretary Steven Chu and incoming BP chief executive Bob Dudley on Friday discussed how to proceed with the final well plug, Allen said.
Pressure tests completed late on Thursday showed that the well is effectively sealed, with "no communication with the reservoir," Allen said.
But engineers are worried that increased pressure from the "bottom kill" could damage the existing temporary cement plug and perhaps cause about 1,000 barrels of oil trapped in the well shaft to flow into the ocean, Allen said. Engineers are developing procedures to allay such concerns, he said.
After Allen gives the order to continue with the relief well, it will take about 96 hours to drill into the Macondo well shaft and perhaps days beyond that to complete the job, he said.
____________
Gulf seafood gets intense safety testing
By LAURAN NEERGAARD
The Associated Press
Monday, August 16, 2010; 4:33 AM
WASHINGTON -- Seafood from the Gulf of Mexico is being put under the microscope like no other kind on the market, with fish, shrimp and other catches ground up to hunt for minute traces of oil - far more reassuring than that sniff test that made all the headlines.
And while the dispersant that was dumped into the massive oil spill has consumers nervous, health regulators contend there's no evidence it builds up in seafood - although they're working to create a test for it, just in case.
More Gulf waters are reopening to commercial hauls as tests show little hazard from oil, and Louisiana's fall shrimp season kicks off Monday. Yet it's too soon to know what safety testing will satisfy a public so skeptical of government reassurances that even local fishermen voice concern.
Basic biology is key: Some species clear oil contamination out of their bodies far more rapidly than others. Fish are the fastest, oysters and crabs the slowest, and shrimp somewhere in between.
"I probably would put oysters at the top of the concern list and I don't think there's a close second," said marine scientist George Crozier, who directs the Dauphin Island Sea Lab in Alabama.
The oil contaminants of most health concern - potential cancer-causing substances called polycyclic aromatic hydrocarbons, or PAHs - show up in other everyday foods, too, such as grilled meat. Low levels also are in seafood sold from other waters.
Where Gulf seafood harvesting has been reopened, "the levels that we see are pretty typical of what we see in other areas, Puget Sound or Alaska," said Walton Dickhoff, who oversees testing at the National Oceanic and Atmospheric Administration's Northwest Fisheries Science Center in Seattle.
Here are some questions and answers about Gulf seafood safety:
Q: What are PAHs? MORE...
____________
Gulf Seafood Testing:
Showing posts with label Gulf Relief Well. Show all posts
Showing posts with label Gulf Relief Well. Show all posts
Monday, August 16, 2010
Saturday, July 17, 2010
Gulf Oil Update: Day 89
Quick answers elusive in integrity testing of blown-out oil well in Gulf of Mexico
Published: Friday, July 16, 2010, 8:34 PM Updated: Friday, July 16, 2010, 9:13 PM
Jaquetta White,
The Times-Picayune
The first day of an "integrity test" on the blown-out well that for months had been shooting oil into the Gulf of Mexico ended with uncertainty, the federal government's point person for spill response said Friday.
BP PLC, via The Associated PressPressure lower than 6,000 pounds per square inch would signal that the well is damaged and that oil is escaping through fissures somewhere. This pressure gauge was photographed July 13.
Retired Coast Guard Admiral and National Incident Commander Thad Allen said the well appears to be in good condition, but that scientists have not yet been able to rule out the possibility of ruptures in the well below the sea floor.
Efforts were under way Friday to increase monitoring at the site to determine whether there are leaks.
"This is generally good news," Allen said. "I think we're at a point where there's enough uncertainty regarding what the pressure means we need to do due diligence going forward to be in a situation where we don't do any harm."
The integrity test involves measuring the pressure inside the Macondo well, which had until Thursday been gushing oil since the Deepwater Horizon rig exploded and sank in the Gulf of Mexico April 20, killing 11 people. BP operated the rig, which it leased from Transocean. The well was closed in Thursday afternoon so that the test could commence.
High pressure, in the range of 8,000 to 9,000 pounds per square inch, would indicate that the well was completely intact, Allen and BP officials have said. Pressure lower than 6,000 pounds per square inch would signal that the well is damaged and that oil is escaping through fissures somewhere.
The results are important because well integrity, or a high pressure reading, would mean that the well can remain shut and oil flow into the Gulf continually halted until the Macondo well is pumped with cement and sealed next month. Low pressure, however, would mean that the well would need to be reopened, allowing oil to spew unfettered into the Gulf until a system of oil collection vessels began pumping again.
Pressure inside the blown-out Macondo well was at 6,720 pounds per square inch on Friday, a grey area that provided two possible answers about the well's condition, Allen said.
Patrick Semansky, The Associated Press These vessels assisting in the capping of the Deepwater Horizon wellhead were photographed Friday in the Gulf of Mexico.
It's possible that there are holes in the well that are leaking oil, Allen said. But it is also possible that the reservoir has been "depleted" in the near three months since the spill began and is no longer capable of producing high rates of pressure.
"There are plausible supporting arguments for both of those," Allen said. "There's a very good chance that depletion could have done it. We're looking for indications that there could be leakage."
So far, there has been no indication of leaking oil, Allen said.
Two ROVs are monitoring the sea floor around the well looking for burps of methane gas or other anomalies. Four of the undersea robots are conducting sonar scanning. None of the vehicles has detected oil outside the well.
Other tests, one that measures the temperature near the top of the well and another that uses acoustic sensors, also did not find oil.
Preliminary results from a seismic test done Friday also provided no indication of oil below the sea floor. BP senior vice president Kent Wells called the test a "key piece of information."
"If we didn't have integrity and we were leaking oil and gas into some lower formation, this should pick that up," Wells said. "We're continuing with it, and at this point there is no evidence that the well does not have integrity, and that is a good thing."
More testing equipment, including a National Oceanic and Atmospheric Administration vessel, were being brought to the site Friday evening to conduct more tests.
Wells said the results so far appear to match with models BP engineers and government scientists have created for what an intact well with a depleted reservoir would produce.
"We've done modeling under numerous different scenarios. The pressure buildup we're seeing is consistent with the modeling we did around reservoir depletion and full integrity," Wells said. "The longer we monitor these trends the longer we'll convince ourselves that that is the case."
Wells said pressure within the Macondo well would not continue rising if it were breached. Instead it would flat-line, and possibly fall.
A Texas geologist who has been following the gusher said he believed well depletion is the likely cause of the lower-than-hoped-for pressure reading, not a leaking well.
"I don't think it's a cause for immediate concern, because it could reflect a natural loss of oil in the reservoir," said Don Van Nieuwenhuise, director of the Professional Geoscience Programs at the University of Houston. "It's amazing that it has held its strength for as long as it has."
Van Nieuwenhuise said the lack of any sign of oil so far is a good sign.
"When they first said this, I said if they can get to 7,000 (pounds per square inch) that would be good," Van Nieuwenhuise said. "The 8,000 to 9,000 estimate reflects its initial pressure, but since it's been bleeding so much, I'm not surprised it's at 7,000."
BP engineers and a team of government and academic scientists are monitoring the pressure readings and meeting every six hours to determine how to proceed, Allen said. If oil is detected outside the well, Allen said crews would immediately try to relieve the pressure inside the well by releasing oil into the sea again. Oil would flow unfettered until two oil collection vessels, the Helix Producer and the Q4000, could be restarted. That process could take "several hours," Allen said. Together, the vessels have the capacity to collect 35,000 barrels of oil. A BP plan, approved by the Coast Guard last month, calls for a total of four vessels with the capacity to collect up to 80,000 barrels of oil to be at work by the end of this month.
Even if it is determined that the well can remain shut in, that would only be a short-term solution for the gusher. The long-term solution for stopping the leak still is a relief well that would connect with the runaway well at about 18,000 feet below the water's surface and pump it with mud and cement.
The relief well has been drilled to about 17,840 feet. Wells said crews would drill for another 30 feet before intercepting the well at the end of July. From that point, it could take from days to a few weeks to kill the well.
A backup relief well has been drilled to 15,874 feet, but drilling on that well has been suspended so as not to interfere with the primary well.
Published: Friday, July 16, 2010, 8:34 PM Updated: Friday, July 16, 2010, 9:13 PM
Jaquetta White,
The Times-Picayune
The first day of an "integrity test" on the blown-out well that for months had been shooting oil into the Gulf of Mexico ended with uncertainty, the federal government's point person for spill response said Friday.
BP PLC, via The Associated PressPressure lower than 6,000 pounds per square inch would signal that the well is damaged and that oil is escaping through fissures somewhere. This pressure gauge was photographed July 13.
Retired Coast Guard Admiral and National Incident Commander Thad Allen said the well appears to be in good condition, but that scientists have not yet been able to rule out the possibility of ruptures in the well below the sea floor.
Efforts were under way Friday to increase monitoring at the site to determine whether there are leaks.
"This is generally good news," Allen said. "I think we're at a point where there's enough uncertainty regarding what the pressure means we need to do due diligence going forward to be in a situation where we don't do any harm."
The integrity test involves measuring the pressure inside the Macondo well, which had until Thursday been gushing oil since the Deepwater Horizon rig exploded and sank in the Gulf of Mexico April 20, killing 11 people. BP operated the rig, which it leased from Transocean. The well was closed in Thursday afternoon so that the test could commence.
High pressure, in the range of 8,000 to 9,000 pounds per square inch, would indicate that the well was completely intact, Allen and BP officials have said. Pressure lower than 6,000 pounds per square inch would signal that the well is damaged and that oil is escaping through fissures somewhere.
The results are important because well integrity, or a high pressure reading, would mean that the well can remain shut and oil flow into the Gulf continually halted until the Macondo well is pumped with cement and sealed next month. Low pressure, however, would mean that the well would need to be reopened, allowing oil to spew unfettered into the Gulf until a system of oil collection vessels began pumping again.
Pressure inside the blown-out Macondo well was at 6,720 pounds per square inch on Friday, a grey area that provided two possible answers about the well's condition, Allen said.
Patrick Semansky, The Associated Press These vessels assisting in the capping of the Deepwater Horizon wellhead were photographed Friday in the Gulf of Mexico.
It's possible that there are holes in the well that are leaking oil, Allen said. But it is also possible that the reservoir has been "depleted" in the near three months since the spill began and is no longer capable of producing high rates of pressure.
"There are plausible supporting arguments for both of those," Allen said. "There's a very good chance that depletion could have done it. We're looking for indications that there could be leakage."
So far, there has been no indication of leaking oil, Allen said.
Two ROVs are monitoring the sea floor around the well looking for burps of methane gas or other anomalies. Four of the undersea robots are conducting sonar scanning. None of the vehicles has detected oil outside the well.
Other tests, one that measures the temperature near the top of the well and another that uses acoustic sensors, also did not find oil.
Preliminary results from a seismic test done Friday also provided no indication of oil below the sea floor. BP senior vice president Kent Wells called the test a "key piece of information."
"If we didn't have integrity and we were leaking oil and gas into some lower formation, this should pick that up," Wells said. "We're continuing with it, and at this point there is no evidence that the well does not have integrity, and that is a good thing."
More testing equipment, including a National Oceanic and Atmospheric Administration vessel, were being brought to the site Friday evening to conduct more tests.
Wells said the results so far appear to match with models BP engineers and government scientists have created for what an intact well with a depleted reservoir would produce.
"We've done modeling under numerous different scenarios. The pressure buildup we're seeing is consistent with the modeling we did around reservoir depletion and full integrity," Wells said. "The longer we monitor these trends the longer we'll convince ourselves that that is the case."
Wells said pressure within the Macondo well would not continue rising if it were breached. Instead it would flat-line, and possibly fall.
A Texas geologist who has been following the gusher said he believed well depletion is the likely cause of the lower-than-hoped-for pressure reading, not a leaking well.
"I don't think it's a cause for immediate concern, because it could reflect a natural loss of oil in the reservoir," said Don Van Nieuwenhuise, director of the Professional Geoscience Programs at the University of Houston. "It's amazing that it has held its strength for as long as it has."
Van Nieuwenhuise said the lack of any sign of oil so far is a good sign.
"When they first said this, I said if they can get to 7,000 (pounds per square inch) that would be good," Van Nieuwenhuise said. "The 8,000 to 9,000 estimate reflects its initial pressure, but since it's been bleeding so much, I'm not surprised it's at 7,000."
BP engineers and a team of government and academic scientists are monitoring the pressure readings and meeting every six hours to determine how to proceed, Allen said. If oil is detected outside the well, Allen said crews would immediately try to relieve the pressure inside the well by releasing oil into the sea again. Oil would flow unfettered until two oil collection vessels, the Helix Producer and the Q4000, could be restarted. That process could take "several hours," Allen said. Together, the vessels have the capacity to collect 35,000 barrels of oil. A BP plan, approved by the Coast Guard last month, calls for a total of four vessels with the capacity to collect up to 80,000 barrels of oil to be at work by the end of this month.
Even if it is determined that the well can remain shut in, that would only be a short-term solution for the gusher. The long-term solution for stopping the leak still is a relief well that would connect with the runaway well at about 18,000 feet below the water's surface and pump it with mud and cement.
The relief well has been drilled to about 17,840 feet. Wells said crews would drill for another 30 feet before intercepting the well at the end of July. From that point, it could take from days to a few weeks to kill the well.
A backup relief well has been drilled to 15,874 feet, but drilling on that well has been suspended so as not to interfere with the primary well.
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