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The AAPG/Datapages Combined Publications Database
Journal of Petroleum Geology
Abstract
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Journal of Petroleum Geology, Vol.
©Copyright 2000 Scientific Press, Ltd.
* 13711 Butterf1y Lane, Houston, Texas 77079, USA.
Abstract
bed
to the
reservoir and trap. Exceptions are producing source-
bed
formations (coal-
bed
gas, e.g. the Permian Spraberry Trend, West
Texas). Where vertical hydrocarbon migration is active, oil/gas
accumulations can be found in reservoirs of geological ages which
are considerably different from those of the generating source
beds. In such cases (e.g. the North Sea gas province, Louisiana
offshore, Niger Delta, Vienna Basin), early recognition of
vertical migration may well bring about the most effective
exploration results. In many basins, vertical migration is less
evident than lateral migration, leading to distinct,
vertically-stacked hydrocarbon systems isolated from each other
(e.g. the Po Valley, Powder River and Sirte Basins). Vertical
migration from one source-
bed
level, or the mixing of
hydrocarbons from different hydrocarbon systems, occurs where
major faults or vertically-rising materials (salt, igneous rocks)
create critical vertical pathways. In such cases, vertical
migration can be an important factor in the location and
existence of hydrocarbon accumulations.
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