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The Seychelles has limited exploration activity and no history of production. In the 1970s the first seismic acquisition was conducted in the region when Mobil included the Mascarene Plateau and adjacent coral banks on a regional survey that ran from East Africa to Sri Lanka.
Burmah Oil acquired reconnaissance seismic over the plateau in 1973 imaging a thick sedimentary basin. Several other oil and gas companies began to evaluate this basin in 1977, acquiring a large amount of 2D seismic and other geophysical data. The first exploratory well was drilled by Amoco in 1980 followed by two further wells. All were dry but reportedly encountered oil and gas shows.
Enterprise, Texaco and Ultramar acquired additional blocks from 1986 and ran more seismic up to 1995 when Enterprise drilled the 4th and final exploration well in the Seychelles. It failed to reach its target of pre-Tertiary clastics, ending in Palaeocene volcanics at 3400m.
Further companies took out exploration blocks from 2005 and a 3D seismic program was completed in 2012. However no wells were drilled and most of these companies have now left. Although a petroleum system may be present in the deep water basin, the high risks and lack of investment leads Globalshift to believe it is very unlikely that the Seychelles will ever produce commercial volumes of oil and gas.
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