Energy Resources Program

Energy Resources Program Home

National Oil and Gas Assessment

DOI and  USGS link and privacy policies apply.



Article Thumbnail Image The Wind River Basin is a large Laramide (Late Cretaceous through Eocene) structural and sedimentary basin that encompasses about 7,400 square miles in central Wyoming. The basin is bounded by the Washakie Range and Owl Creek and southern Bighorn Mountains on the north, the Casper arch on...
Monday, February 04, 2013  Type: Publication

Article Thumbnail Image Shale is an increasingly important source of natural gas in the United States. The gas is held in fine pores that need to be accessed by horizontal drilling and hydrofracturing techniques. Understanding the nature of the pores may provide clues to making gas extraction more efficient. We have...
Tuesday, January 29, 2013  Type: Outside Publication

Article Thumbnail Image This study updates a stratigraphic cross section published as plate 2 in USGS Digital Data Series 69-G. The datum is a marine/tidal ravinement surface within the Cozzette Sandstone Member of the Iles Formation and the Thompson Canyon Sandstone and Sulphur Canyon Sandstone Beds of the...
Thursday, January 03, 2013  Type: Publication

Article Thumbnail Image The Upper Cretaceous Austin Chalk forms a low-permeability, onshore Gulf of Mexico reservoir that produces oil and gas from major fractures oriented parallel to the underlying Lower Cretaceous shelf edge. Horizontal drilling links these fracture systems to create an interconnected network that...
Thursday, December 20, 2012  Type: Publication

Article Thumbnail Image Using a probabilistic geology-based methodology, a team of U.S. Geological Survey (USGS) scientists recently assessed the remaining recoverable oil in 10 oil fields of the Los Angeles Basin in southern California. The results of the assessment suggest that between 3.2 and 5.6 billion barrels...
Wednesday, November 28, 2012  Type: Publication

Article Thumbnail Image The Middle Eocene Claiborne Group was assessed using established U.S. Geological Survey (USGS) assessment methodology for undiscovered conventional hydrocarbon resources as part of the 2007 USGS assessment of Paleogene-Neogene strata of the United States part of the Gulf of...
Wednesday, October 24, 2012  Type: Publication

Article Thumbnail Image The U.S. Geological Survey assessed unconventional oil and gas resources of the Upper Ordovician Utica Shale and adjacent units in the Appalachian Basin Province. The assessment covers parts of Maryland, New York, Ohio, Pennsylvania, Virginia, and West Virginia. The geologic concept is that black...
Thursday, October 04, 2012  Type: Press Release & Publication

Article Thumbnail Image Evaluation of resources such as tight sands and gas shales has required the formulation of different assessment models than those used for the inference of conventional resources. Formulations in present use are based in classical statistics that ignore the partly organized and partly random geograp...
Monday, October 01, 2012  Type: Outside Publication

Article Thumbnail Image The main objective of the National Assessment of Oil and Gas Project is to assess the potential for undiscovered oil and natural gas resources of the onshore United States. The last comprehensive National Assessment was completed by the USGS in 1995, and since 2000 the USGS has been re-assessing...
Wednesday, September 05, 2012  Type: Site News

Article Thumbnail Image The U.S. Geological Survey estimated volumes of technically recoverable, conventional petroleum resources that have the potential to be added to reserves from reserve growth in 70 discovered oil and gas accumulations of the United States, excluding Federal offshore areas.
Tuesday, August 14, 2012  Type: Press Release & Publication
Page 2 of 6First   Previous   1  [2]  3  4  5  6  Next   Last   


The USGS Energy Resources Program provides periodic assessments of the oil and natural gas endowment of the United States. New, prioritized, assessment results, as part of the Energy Policy and Conservation Act (EPCA) and the current National Assessment are shown above. Additional EPCA and priority basin assessment results will be posted as they become available.

Christopher Schenk
Project Chief



USGS Economic Analysis Updated for the National Petroleum Reserve in Alaska (NPRA)

Content on this page requires a newer version of Adobe Flash Player.

Get Adobe Flash player

Download Directly | See Podcast Transcript


3 to 4.3 Billion Barrels of Oil in North Dakota and Montana

Content on this page requires a newer version of Adobe Flash Player.

Get Adobe Flash player

Download Directly | See Podcast Transcript




Get Adobe Flash player



Page Last Modified: Monday, January 13, 2014



Publications Database
Publications & Advanced Search
A searchable database of thousands of published sources, dating back several decades
USGS Energy Data Finder
Find Data
USGS Energy Data Finder:  Download GIS and tabular data, databases, geospatial web services (ArcGIS, WMS, KML)
A single map viewer portal incorporating a range of maps, data and services
National Coal Resources Data System
National Coal Resources Data System
USGS coal resources databases of national scope