This. The biggest worries is not that production will be impacted, as most oil production in that region is already well guarded by the 3rd party companies in charge of the extraction (think Niger Delta, which has been seriously disrupted); and whoever is trying to take charge will attempt to keep those guards in place. Especially since none of the revolutionary movements so far have been talking about expropriation of assets.

More worrying are the transmission pipelines and ports for the tankers. The Economist did a review of that because of the Suez Canal, which is already in danger from Egypt, and they pinpointed 3 spots that were in danger in that area. But even with that, if we assume the disruption is short lived (<30 days), the US holds stocks of that much oil.