The U.S. Geological Survey (USGS) recently completed an assessment of the undiscovered
oil and gas potential of the Eastern Great Basin Province of eastern
Nevada, western Utah, southeastern Idaho, and northwestern Arizona. The province includes Neogene basins, Neogene ranges and structures,
the central Nevada thrust belt, and the Sevier thrust belt. The assessment
was based on the primary geologic elements that constitute a total petroleum
system (TPS): petroleum source rocks (source rock maturation, petroleum
generation, and migration), reservoir rocks (based on sequence stratigraphy
and petrophysical properties), and petroleum traps (formation and timing).
Using this geologic framework, the USGS defined the Paleozoic-Tertiary
Composite TPS and three assessment units (AU) within the TPS, and quantitatively
estimated the undiscovered oil and gas resources within the three AUs.
|Posted July 2005