1995 National Oil and Gas Assessment 1/4-Mile Cells within the Eastern Great Basin Province

The purpose of the cell map is to display the exploration maturity,
type of production, and distribution of production in quarter-mile
cells in each of the oil and gas plays and each of the provinces
defined for the 1995 U.S. National Oil and Gas Assessment.

Cell maps for each oil and gas play were created by the USGS as a
method for illustrating the degree of exploration, type of production,
and distribution of production in a play or province. Each cell
represents a quarter-mile square of the land surface, and the cells
are coded to represent whether the wells included within the cell are
predominantly oil-producing, gas-producing, both oil and
gas-producing, or dry. The well information was initially retrieved
from the Petroleum Information (PI) Well History Control System
(WHCS), which is a proprietary, commercial database containing
information for most oil and gas wells in the U.S. Cells were
developed as a graphic solution to overcome the problem of displaying
proprietary WHCS data. No proprietary data are displayed or included
in the cell maps. The data from WHCS were current as of December 1990
when the cell maps were created in 1994.

Oil and gas plays within province 19 (Eastern Great Basin) are listed
here by play number, type, and name:

Number Type Name
1901 conventional Unconformity "A"
1902 conventional Late Paleozoic
1903 conventional Early Tertiary - Late Cretaceous Sheep Pass
and Equivalents
1905 conventional Younger Tertiary Basins
1906 conventional Late Paleozoic - Mesozoic (Central Nevada) Thrust Belt
1907 conventional Sevier Frontal Zone