From the Nation:
On June 15, in their testimony before the House Energy and Commerce Committee, the chief executives of America’s leading oil companies argued that BP’s Deepwater Horizon disaster in the Gulf of Mexico was an aberration—something that would not have occurred with proper corporate oversight and will not happen again once proper safeguards are put in place. This is fallacious, if not an outright lie. The Deep Horizon explosion was the inevitable result of a relentless effort to extract oil from ever deeper and more hazardous locations. In fact, as long as the industry continues its relentless, reckless pursuit of “extreme energy”—oil, natural gas, coal and uranium obtained from geologically, environmentally and politically unsafe areas—more such calamities are destined to occur.
I’m not sure sure about the other scenarios, but the Nigeria scenario seems pretty unlikely at this point. There, oil companies have gotten the hint: after violence directed at oil workers by militant indigenous organizations, those companies pulled out and the NIgerian government has nationalized most production last year. I haven’t studied the other two situations, however, and they are worth thinking about.