Disruptions in supply could push up pump prices, as they did after Katrina.
Opting for dialogue, President Umaru Yar'Adua promises to address underdevelopment in the region.
But short-term pressures may keep them up for a while.
Borrowing a page from militants, a village chief threatens Shell over naming rights for the country's first well.
One year after President Umaru Yar' Adua took power, vowing to bring stability to the oil-rich Niger Delta region, observers say little progress has been made.