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Stratigraphic Cross Section of Measured Sections and Drill Holes of the Neslen Formation and Adjacent Formations, Book Cliffs Area, Colorado and Utah

	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 Neslen Formatio...
Thursday, January 03, 2013  Type: Publication

Geologic models and evaluation of undiscovered conventional and continuous oil and gas resources—Upper Cretaceous Austin Chalk, U.S. Gulf Coast

	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

Remaining Recoverable Petroleum in Giant Oil Fields of the Los Angeles Basin, Southern California

	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

Geologic Assessment of Undiscovered Conventional Oil and Gas Resources—Middle Eocene Claiborne Group, United States Part of the Gulf of Mexico Basin

	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

Assessment of undiscovered oil and gas resources of the Ordovician Utica Shale of the Appalachian Basin Province, 2012

	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

Geostatistical population-mixture approach to unconventional resource assessment with an application to the Woodford gas shale, Arkoma Basin, eastern Oklahoma

	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

2012 Assessment Update Maps and Tables Now Available

	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

Assessment of Potential Additions to Conventional Oil and Gas Resources in Discovered Fields of the United States from Reserve Growth, 2012

	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

Global Prediction of Continuous Hydrocarbon Accumulations in Self-Sourced Reservoirs

	This report was first presented as an abstract in poster format at the American Association of Petroleum Geologists (AAPG) 2012 Annual Convention and Exhibition, April 22‒25, Long Beach, Calif., as Search and Discovery Article no. 90142.   Shale resource plays occur in predictable tectonic...
Monday, August 13, 2012  Type: Publication

Analytic Resource Assessment Method for Continuous (Unconventional) Oil and Gas Accumulations—The "ACCESS" Method

	The U.S. Geological Survey (USGS) periodically assesses petroleum resources of areas within the United States and the world. The purpose of this report is to explain the development of an analytic probabilistic method and spreadsheet software system called Analytic Cell-Based Continuous Energy...
Thursday, August 09, 2012  Type: Publication

Overview

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

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