HEADWATERS ECONOMICS GEOGRAPHIC DATA LIBRARY DOCUMENTATION

TITLE: 
Geodataset Name: 		NA_OilGasAccumulations
Geodataset Type: 		SHAPE
Geodataset Feature: 		POLYGON

GENERAL DESCRIPTION: 
This dataset contains geologic boundaries of undiscovered oil and gas accumulations.  The fundamental geologic unit used is the play, which is defined as a set of known or postulated oil and or gas accumulations sharing similar geologic, geographic, and temporal properties.  The Canadian accumulations are delineated as Total Petroleum Systems, 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.

DATA SOURCE(S):  		U.S. Geological Survey
                        	
Scale of Original Source Maps:	Unknown
Date of Original Source Maps:	1995-2005 (depending on location)

GEODATASET EXTENT:  	North America
 
FEATURE ATTRIBUTE TABLES CODES AND VALUES: 

ITEM			ITEM DESCRIPTION
Oil			Estimated technically recoverable oil (millions of barrels per square kilometer).
Gas			Estimated technically recoverable gas (millions of cubic feet per square kilometer).
Coalbed			Estimated technically recoverable coal bed methane (millions of cubic feet per square kilometer).

DATA LINEAGE SUMMARY: 
The datasets were developed by the USGS and can be downloaded at http://energy.cr.usgs/gov and http://energy.usgs.gov/noga.  The Canadian values were taken from the Rem_oil and Rem_gas items of the tps_sumg layer.  The U.S. values were derived from the summary tables cbm.xls and total_oilgas_resources.xls. The plays and total petroleum systems within each province or region were merged together, and the estimates of oil, gas and coalbed methane for each were than divided by the area of the merged plays to calculate the amount of recoverable resource per square kilometer.

MAP PROJECTION PARAMETERS 
PROJECTION 			ALBERS CONICAL EQUAL AREA
DATUM 				NAD83
UNITS 				METERS
SPHEROID 			GRS1980
PARAMETERS
1st standard parallel		29 30  0.000
2nd standard parallel		45 30  0.000
central meridian		-96 00  0.000
latitude of projection's origin	37 30  0.000
false easting (meters)		0.00000
false northing (meters)		0.00000

DATA SOURCES CONTACT(S): 
Name: 			U.S. Geological Survey, Central Region Energy Team
Address:		U.S.G.S. MS939, Box 25046
			Denver, CO  80225
Phone:			(303) 236-7773
Web site: 	  	http://energy.usgs.gov/noga

Name:			U.S. Geological Survey
Address:		Box 25286, Building 810
			Denver Federal Center
			Denver, CO  80225
Phone:			1-888-275-8747          

HEADWATERS ECONOMICS CONTACT: 
Name:			Headwaters Economics Geographic Data Library
Abbr. Name:		HEGDL
Address:		Headwaters Economics
                        566 Highland St.
                        Helena, Montana 59601
Web site:		http://www.headwaterseconomics.org
Contact Person:   	Patty Gude	
Phone:   		(406)599-7425	
Email:   		patty@headwaterseconomics.org