The Deepwater Horizon oil spill (also referred to as the BP oil spill, the Gulf of Mexico oil spill, the BP oil disaster or the Macondo blowout) is an oil spill in the Gulf of Mexico
which flowed for three months in 2010. The impact of the spill still
continues even after the well was capped. It is the largest accidental
marine oil spill in the history of the petroleum industry. The spill stemmed from a sea-floor oil gusher that resulted from the April 20, 2010 Deepwater Horizon explosion. The explosion killed 11 men working on the platform and injured 17 others. On July 15, the leak was stopped by capping the gushing wellhead, after it had released about 4.9 million barrels (780Ã—10
^3 m3), or 205.8 million gallons of crude oil. It was estimated that 53,000 barrels per day (8,400 m3/d) were escaping from the well just before it was capped. It is believed that the daily flow rate diminished over time, starting at about 62,000 barrels per day (9,900 m3/d) and decreasing as the reservoir of hydrocarbons feeding the gusher was gradually depleted.
On September 19, the relief well process was successfully completed and
the federal government declared the well "effectively dead".