The Deepwater Horizon oil spill is finally coming to an end. After over 100 days, it seems that a cap, a static kill and the relief well will finally stop oil from pouring into the sea.
The estimate for the flow of the well has changed many times over the past 3 months. It seems to be topping out at around 62,000 barrels a day. This is much higher than the original estimates, but how do they calculate the flow? The USGS used video of the oil spill, mass balance calculations and remote sensors to determine how much crude oil was flowing out of the break.
|photo credit: lagohsep|
So what has happened to all the oil? Well, the White House says that 75% has been dispersed, collected, burned off or evaporated. Other reports have different numbers. In July the old cap on the well was replaced with a new and better one that captured most of the oil. Then a static kill, which uses mud to force pressure down in the well, helped to stanch the flow. The relief wells have been drilled and there seems to be no seeping. All of that means that the oil spill is over. 4.9 million barrels was pumped out in the Gulf, making this the largest oil spill in the Gulf and the third largest oil spill in history.
BP is waiting on a pressure test to see if they need to initiate a bottom kill. A bottom kill is when they drill to the bottom of the well and pump in mud and cement through the bottom of the well.
|photo credit: uscgd8|
Also the Mineral Management Services (MMS) has been broken up into the Bureau of Ocean Energy Management. The MMS was responsible for conservation and environmental protection on federal land used by energy companies as well as collecting royalties and enforcing regulations on companies that used federal lands to produce crude oil and natural gas. They were plagued with accusations of corruption and ineptitude. The new Bureau of Ocean Energy Management, or Bureau of Ocean Energy, has been subdivided into the Offshore Energy and Minerals Management and Minerals Revenue Management. This means that the people who enforce the regulation are not the same people who collect the revenue.
The 4.9 million barrels that were pumped out into the ocean will have long reaching environmental consequences. Some scientists worry that all the natural bacteria that ate the oil will help to form an area that is low in oxygen. However, a mass killing of fish does not require an oil disaster. Numerous beaches were closed to tourists and locals alike. Also some areas set aside for fishing (and shrimping) were closed because of the oil spill. Unfortunately, it will take a long time to see what the real lasting effects of the spill are. In fact, it will take years to determine the true effects. Most of the beaches and fishing areas have been reopened.
Waking up on April 20, no one would have thought that we would be dealing with an unprecedented disaster in the Gulf. No one thought that such a disaster would be linked with how we perceive the modern world or our every day life. Will we take steps to prevent the next one?