A Chevron offshore natural gas well, drilling in the Niger Delta, caught fire four weeks ago and is damaging fish stocks and fouling beaches.

The fire is causing damage similar to that caused in the offshore U. S. Gulf Coast by the BP disaster.
Two workers were killed in the initial explosion.

Estimates are that it will take another month to control the fire.

Global Post, "Nigeria News: Chevron fire in Niger Delta enters week four." Heather Murdock, Feb. 6, 2012.
Bloomberg, Jan. 17, 2012, Edward Klump. "Chevron says two workers still missing as fire burns off Nigeria."

Other than initial reports, I have not found a detailed article or follow up news about the disaster.