BP Issues Internal Report Detailing Causes of Oil Spill

BP took some of the blame for the Gulf oil disaster in an internal report issued Wednesday, acknowledging among other things that it misinterpreted a key pressure test of the well.

But in a possible preview of its legal strategy, it also pointed the finger at its partners on the doomed rig.

The highly technical, 193-page report attributes the worst offshore oil spill in U.S. history and the rig explosion that set it off to a complex chain of failures both human and mechanical. Some of those problems have been made public over the past 4.5 months, such as the failure of the blowout preventer to clamp the well shut.

Here's my take on the blame game: who the BP report on the Deepwater oil spill points the finger at for the astonishing catalogue of errors and failures that caused the Deepwater disaster. BP owned the well lease. Transocean were contracted by BP and operated the rig and blow out preventer - they have already condemned the BP report as "self-serving". Halliburton did the cementing, but has not yet responded in detail to BP's report.

BP blamed a series of mechanical and human failures by its own crews and its contractors for the April 20 oil rig explosion in the Gulf of Mexico, escalating a blame game that is likely headed to the courts.

The oil company, releasing its long-awaited internal investigation into the gulf disaster Wednesday, accepted a share of the responsibility but also took aim at failures on the part of contractors Transocean and Halliburton for shortcomings such as a "bad cement job" and a failure to spot problems.