<abstract>Cell maps for each oil and gas assessment unit were created by the USGS as a method for illustrating the degree of exploration, type of production, and distribution of production in an assessment unit 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, dry, or the type of production of the wells located within the cell is unknown. The well information was initially retrieved from the IHS Energy Group, PI/Dwights PLUS Well Data on CD-ROM, 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 PI/Dwights PLUS Well Data. No proprietary data are displayed or included in the cell maps. The data from PI/Dwights PLUS Well Data were current as of October 2001 when the cell maps were created in 2002.</abstract>
<purpose>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 assessment units and each of the provinces defined for the National Assessment of Oil and Gas Project.</purpose>
<supplinf>Oil and gas assessment units within province 065 (Black Warrior Province) are listed here by assessment unit number and name:
>Number Name
>50650101 Pre-Mississippian Carbonates Gas
>50650102 Carboniferous Sandstones Oil and Gas
>50650281 Black Warrior Basin Coalbed Gas
The following is a description of the Online Linkage URLs:
http://certmapper.cr.usgs.gov/noga/servlet/NogaGISResultsServ?subtheme=65&page=gis&vintage=2000 - GIS Data Download Page for Province 65
http://pubs.usgs.gov/dds/dds-069/dds-069-i/ - Petroleum Systems and Geologic Assessment of Oil and Gas in the Black Warrior Province, USGS DDS-69-I
<placekey>50650102 = Carboniferous Sandstones Oil and Gas</placekey>
<placekey>50650281 = Black Warrior Basin Coalbed Gas</placekey>
</place>
</keywords>
<accconst>none</accconst>
<useconst>none</useconst>
<ptcontac>
<cntinfo>
<cntperp>
<cntper>Christopher J. Schenk</cntper>
<cntorg>U.S. Geological Survey, Central Energy Resources Team</cntorg>
</cntperp>
<cntpos>Geologist</cntpos>
<cntaddr>
<addrtype>mailing and physical address</addrtype>
<address>U.S. Geological Survey, Box 25046, MS 939, Denver Federal Center</address>
<city>Denver</city>
<state>Colorado</state>
<postal>80225</postal>
<country>USA</country>
</cntaddr>
<cntvoice>(303) 236-5796</cntvoice>
<cntemail>schenk@usgs.gov</cntemail>
</cntinfo>
</ptcontac>
<datacred>Biewick, L.R.H., Weiler, S. and Skinner, C.C.</datacred>
<native>ARC/INFO version 8.2</native>
</idinfo>
<dataqual>
<attracc>
<attraccr>The cell locations and cell attributes were visually compared to the hard-copy map: Mast, R. F., Root, D.H., Williams, L.P., Beeman, W.R., and Barnett, D.L., 1998, Areas of historical oil and gas exploration and production in the conterminous United States: U.S. Geological Survey Oil and Gas Investigations Map I-2582, 1 sheet; http://energy.cr.usgs.gov/oilgas/noga/oilgasmap.htm.</attraccr>
</attracc>
<logic>The accuracy of the cells, as created by the Arc Macro Language (AML) program of L.R.H. Biewick, S. Weiler and C.C. Skinner, depends upon the accuracy of the oil and gas well information in the 2001 version of the IHS Energy Group, PI/Dwights PLUS Well Data. For the National Assessment of Oil and Gas Project, the assumption was made that the data in PI/Dwights PLUS were of sufficient accuracy for such a national-scale analysis.</logic>
<complete>The cells were defined using the 2001 well data in the IHS Energy Group, PI/Dwights PLUS. The PI/Dwights PLUS Well Data contains over two million, nine hundred thousand wells for the U.S., which, although not a complete tabulation of all U.S. wells, is the most complete well database available for the United States.</comple
