BP’s cap on the ruptured gulf coast oil well is a two-edged sword. On the one hand, there is a good chance it will hold and the problem will be solved. On the other hand, the cap makes it harder to verify whether this solution has failed.
The cap means that pressure is diverted elsewhere underground. Right now there is a camera in place pointing at the capped part of the well. When the cap was not in place this camera made it common knowledge whether oil was flowing into the gulf and it made quite clear how much. With the cap however, “seepage” in other locations can only be measured by noisy tests that can easily be disputed by both parties.
For example, BP will cite:
Some seepage from the ocean floor is normal in the Gulf of Mexico, according to University of Houston professor Don Van Nieuwenhuise.
“A lot of oil that’s formed naturally, by the Earth, ends up escaping or leaking to the surface in the form of natural seeps and yes, there are a lot of these all around the world,” he said.
and the government will argue:
“If the well remains fully shut in until the relief well is completed, we may never have a fully accurate determination of the flow rate from this well. If so, BP — which has consistently underestimated the flow rate — might evade billions of dollars of fines,” Markey, D-Massachusetts, said in a letter to Allen released Sunday.
The deadweight loss of negotiation and litigation means that even if the risk to the gulf is substantially reduced by having the cap in place, it may still be better to uncap the well and seek solutions (such as extraction of the flowing oil) that can be monitored directly by the camera that is already there.
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July 19, 2010 at 5:18 pm
Colin
I’m confused by this one.
1) When did we stop wanting oil? Of course extract it (as soon as it can be contained and controlled).
2) Does Markey want the oil to keep spewing just so that BP’s tab keeps growing?
3) If seepage is normal, why would BP be responsible for it anyway? I’m no geofluidynamicist but wouldn’t pressure release from man made oil wells reduce seepage in the surrounding area?
July 19, 2010 at 5:48 pm
jeff
Here is one scenario. With the cap on, building pressure causes damage elsewhere that results in 1) seepage that is hard to verify and 2) a non-functioning well for the purposes of extraction.
Because of the verifiability problem the government would have a hard time making BP internalize the costs of such a scenario. This would explain why BP apparently prefers to keep the cap in place permanently:
http://m.yahoo.com/w/ynews/article/topstories/0?url=http://xml.news.yahoo.com/us/news/rss/richstoryrss.html?u=/ap/us_gulf_oil_spill&.ts=1279579434&.intl=US&.lang=en
July 20, 2010 at 12:26 pm
Anonymous
Your argument does not make much sense to me. The oil was there already before BP started extracting it. It was exerting pressure and producing seepage anyway. If anything, the fact that some oil has been extracted by BP has reduced the amount of underground pressure.
July 20, 2010 at 12:40 pm
jeff
i would guess that drilling a well has brought the oil closer to the ocean floor and also weakened the surrounding rock.
July 20, 2010 at 5:26 pm
Colin
That’s what I was thinking. Upon further review it looks as though the BP well has brought oil pressure closer to the surface, and that can result in more seepage than would naturally occur. Evidence for this is in the Yahoo article Jeff posted above. BP intends to keep the current cap on until their intercepting well can pump cement in deep underground.
But that gets me wondering about question 1 again.