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U.S. Geological Survey
Open-File Report 02-439
Version 1.0
Online Only

U.S. Geological Survey 2002 Petroleum Resource Assessment of the National Petroleum Reserve in Alaska (NPRA): GIS Play Maps

By Christopher P. Garrity, David W. Houseknecht, and Kenneth J. Bird


This report provides digital GIS files of maps for each of the 24 plays evaluated in the U.S. Geological Survey (USGS) 2002 petroleum resource assessment of the NPRA (Bird and Houseknecht, 2002a). These are the same maps released in pdf format by Bird and Houseknecht (2002b).

The USGS released in 2002 a summary of the estimated volume of technically recoverable, undiscovered oil and nonassociated gas resources for 24 plays in NPRA (Bird and Houseknecht, 2002b). The NPRA assessment study area includes Federal and Native onshore land and adjacent State offshore areas. A map showing the areal extent of each play was prepared by USGS geologists as a preliminary step in the assessment process. Boundaries were drawn on the basis of a variety of information, including seismic reflection data, results of previous exploration drilling, and regional patterns of rock properties. Play boundary polygons were captured by digitizing the play maps prepared by USGS geologists. Federal, Native, and State areas were later clipped from the play boundary polygons, allowing for acreages to be calculated for entire plays and for various subareas within plays.

References Cited

Bird, K.J., and Houseknecht, D.W., 2002a, U.S. Geological Survey 2002 petroleum resource assessment of the National Petroleum Reserve in Alaska (NPRA): U.S. Geological Survey Fact Sheet 045-02, 6 p. Available online at:

Bird, K.J., and Houseknecht, D.W., 2002b, U.S. Geological Survey 2002 petroleum resource assessment of the National Petroleum Reserve in Alaska (NPRA): Play maps and technically recoverable resource estimates: U.S. Geological Survey Open-File Report 02-207, 18 p. Available online at:

Online Links

National Petroleum Reserve in Alaska - 2002 Assessment:

Download Online Files

GIS Play Maps (Compressed) [28.8 MB]

Accessing the Assessment Maps on Your Computer

This ArcView project has a compressed directory strucuture and should be extracted to the user's hard drive by following the directions below:

System Requirements (minimum)

Microsoft Windows:


This publication was prepared by an agency of the United States Government. Neither the United States Government nor any agency thereof, nor any of their employees, makes any warranty, expressed or implied, or assumes any legal liability or responsibility for the accuracy, completeness, or usefulness of any information, apparatus, product, or process disclosed in this report, or represents that its use would not infringe privately owned rights. Reference therein to any specific commercial product, process, or service by trade name, trademark, manufacturer, or otherwise does not constitute or imply its endorsement, recommendation, or favoring by the United States Government or any agency thereof. Although data from this publication has been used by the U.S. Geological Survey, no warranty, expressed or implied, is made by the U.S. Geological Survey as to the accuracy of the data. The act of distribution shall not constitute any such warranty, and no responsibility is assumed by the U.S. Geological Survey in the use of this data.

Licensing Information

ESRI and ArcView are registered trademarks of Environmental Systems Research Institute, Inc., in the United States and are either trademarks or registered trademarks in all other countries where they are used. ArcView software is the intellectual property of ESRI and is provided under license agreement. Copyright (c) 1992-2000 ESRI. All rights reserved. ESRI retains exclusive rights, title, and ownership of the ArcView Data Publisher software (Software and Related Materials) and grants to Licensee a personal, nonexclusive, nontransferable license right to use the underlying Software and Related Materials. Licensee shall not reverse engineer, decompile, or disassemble the Software, or make any attempt to unlock or bypass the Software locking mechanism used herein. Software and Related Materials are provided "AS IS" without warranty of any kind, either express or implied. ESRI shall not be liable for direct, indirect, special, incidental, or consequential damages related to Licensee's user of the Software and Related Materials, even if ESRI is advised of the possibility of such damage.

Contact Information

For questions about the scientific content of this report, contact Chris Garrity or Dave Houseknecht.

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