World Total Petroleum System Summary Result Data, 2000 World Petroleum Assessment

This shapefile includes arcs and polygons that describe
U.S. Geological Survey delineated
Total Petroleum Systems of the World. Each petroleum system
is defined as a mappable entity encompassing genetically
related petroleum that occurs in seeps, shows and accumulations
(discovered or undiscovered) that have been generated by a pod,
or by closely related pods, of mature source rock, together with
the essental mappable geologic elements (source, reservoir, seal
and overburden rocks) that control fundamental processes of
generation, migration, entrapment and preservation of petroleum.
Total petroleum systems are described by U.S. Geological Survey
scientists on the basis of exploration and production histories,
and extensive literature searches. Total petroleum systems are
identified with a numeric code derived from the numeric code
of the World Geologic Provinces as defined by the
U.S. Geological Survey World Energy Project. Most total
petroleum systems are contained within a single geologic
province, but there are numerous cases where systems
span more than one province. Summary results of the assessment
are presented as attributes of this shapefile.