But Nigeria is not the only big oil producer that is having political problems and could have production disruptions.

Due to production disruptions, Sony announced that it may decide to limit the initial release of PlayStation Vita to one region by the end of 2011.

The current supply shortage results mainly from production disruptions in the Gulf of Mexico, where nearly 40 percent of output remains shut.

The risk management service will cover particular problems such as legislation, contamination, production disruption, quality standards and health and safety.

With growing consumption, tight supplies and little spare capacity, the industry remains vulnerable to production disruptions.

Perhaps most of all, the surprisingly calm weather this hurricane season has alleviated fears of another serious production disruption like the one that followed Hurricane Katrina a year ago.

Organized by the Congress of South African Trade Unions, the strike caused scattered service and production disruptions for some businesses.

Oil prices have been rising on worries about production disruptions in Nigeria and Venezuela and a nuclear standoff between Iran and Western powers.

He gave American oil companies more time to pay back emergency loans taken from the reserve after the production disruptions of the last hurricane season.

Despite Harold's injury and ongoing recovery, no major Desperate Housewives production disruptions were expected.