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Issue 2, Volume 10, 2013
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Oilfield Glossary
Commercial accumulations of liquid hydrocarbons have remained elusive in East Africa, despite numerous shows and seeps. Could a reanalysis of the Petroleum Systems lead to renewed exploration?
The Norwegian Sea continental margin is dominated by the deep-water Vøring and Møre basins, which contain thick Cretaceous and Tertiary fills. To the east lie the Halten Terrace, Nordland Ridge and Trøndelag Platform, with a cover of Triassic, Jurassic and Cretaceous sediments. To the west, the Vøring and Møre Marginal Highs are overlain by a thick pile of early Tertiary lavas.
The Bristol Bay is a frontier basin with very limited seismic and well data available to the public. Preliminary analyses of the limited subsurface data coupled with surface outcrop data indicate the existence of a tertiary petroleum system and possibility of an underlying Mesozoic petroleum system. The basin is considered as primarily a gasprone province.
A multitude of geological data suggests that the petroleum system is in place. Rich, voluminous source rocks, likely migration paths, good reservoir rocks and huge traps all make the Seychelles offshore basins a tempting target for companies ready to explore a frontier province.
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