It turns out the oil field BP has been playing with for greedy gain is a notoriously volatile one. They've been trying to get a handle on for over a decade. Named Crazy Horse due to its unpredictable nature, BP was forced to change the project name to Thunder Horse in deference to the Lakota tribe spiritual reference.
(Wikipedia) 'Thunder Horse oil field is a large offshore deepwater production site in the Gulf of Mexico, around 150 miles (240 km) southeast of New Orleans, Louisiana.
The Thunder Horse discovery well was drilled in 1999 on Mississippi Canyon block 778. It was drilled to a depth of 25,770 feet (7,850 m) from the drillship Discoverer Enterprise, hitting three intervals of oil.
In February 2001 a new field known as Thunder Horse North was drilled in block 776, approximately 5 miles northwest of the original field. This well reached 26,000 feet (7,900 m) and again met three intervals of oil.
Actually developing the field was a major technological challenge due to the depth of the find. Not only are the distances large, but at such depths the formations holding the hydrocarbons create pressures over 1,200 bars (120 MPa) and temperatures of 135 °C (275 °F).