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It has large oil reserves and has such been of interest to foreign oil companies such as ExxonMobil, Shell and Elf.
Oil reserves are along the Atlantic coast, mostly off shore Cabinda and the northern border area between Quinzau and Soyo.
In 1988, interest in the region renewed, and in November 1996 Exxon and the government of Chad signed an agreement outlining the development of oil reserves in the Doba basin.
Shale oil reserves are located in the oil shale at Seefeld in Bächen Valley plate and close to Lake Achen.