The Movement for the Emancipation of the Niger Delta (MEND) says armed with assault rifles and heavy machine guns raided an oil facility jointly operated by Royal Dutch Shell and Chevron in Rivers state.

VOA: standard.2009.12.21

But oil giant Shell, which accounts for about half of Nigerian oil production, said shipments were continuing "undisrupted", as senior managers took over posts from striking workers.

BBC: Nigeria oil strike escalates

Mr. TERRY O'CONNOR (Oil Shale Program, Shell Oil Company): It's called the in-situ conversion process or the acronym, ICP.

NPR: Industry Seeks to Extract Oil from Rocky Mountain Shale

Case in point: Oil majors like Exxon Mobil, Chevron, ConocoPhillips, BP 's BPAmerica and Shell Oil USA, a unit of Royal Dutch Shell.

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