1) Nigeria (Niger delta, + neighboring parts of West Africa)
2) North Sea (between UK, Netherlands, Denmark, Norway)
3) Persian Gulf (Iraq, Iran, Saudi Arabia, Kuwait)
4) Caucasus area (part of CIS, former USSR), including Baku,
plus Kazakhstan, Caspian Basin
5) Venezuela
6) Los Angeles Basin, Wilmington Field (Los Angles County,
California)
7) West Texas, Delaware Basin
8) Gulf of Mexico, coastal Louisiana and Texas
9) Indonesia
10) Western Overthrust Belt (Montana, Wyoming, Idaho,
western Canada)
11) Alaska “North Slope”, Prudhoe Bay
12) U.S. Midcontinent (Oklahoma, Kansas)