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Stephanie Gaswirth, Ph.D. (Former Employee)

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Province 5031 Williston Basin

Williston Basin Oil and Gas Assessments

The U.S. Geological Survey completed the following assessments of conventional and continuous oil and gas resources of the Devonian Three Forks Formation and Devonian and Mississippian Bakken Formation in the Williston Basin Province 5031 of North Dakota, Montana, and South Dakota.
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Energy and Minerals Mission Area, Energy Resources Program, Central Energy Resources Science Center
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Williston Basin Oil and Gas Assessments

The U.S. Geological Survey completed the following assessments of conventional and continuous oil and gas resources of the Devonian Three Forks Formation and Devonian and Mississippian Bakken Formation in the Williston Basin Province 5031 of North Dakota, Montana, and South Dakota.
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Province 5044 Permian Basin Oil and Gas Assessments

Permian Basin Oil and Gas Assessments

The USGS has conducted several assessments of undiscovered oil and gas in formations in the Permian Basin of western Texas. This inlcudes the following.
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Energy and Minerals Mission Area, Energy Resources Program, Central Energy Resources Science Center
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Permian Basin Oil and Gas Assessments

The USGS has conducted several assessments of undiscovered oil and gas in formations in the Permian Basin of western Texas. This inlcudes the following.
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USGS National and Global Oil and Gas Assessment Project - Permian Basin Province, Midland Basin, Wolfcamp Shale Assessment Unit Boundaries and Assessment Input Data Forms, Version 2.0

The Assessment Unit is the fundamental unit used in the National Assessment Project for the assessment of undiscovered oil and gas resources. The Assessment Unit is defined within the context of the higher-level Total Petroleum System. The Assessment Unit is shown herein as a geographic boundary interpreted, defined, and mapped by the geologist responsible for the province and incorporates a set o
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Energy Resources Program, Central Energy Resources Science Center

USGS National and Global Oil and Gas Assessment Project-Permian Basin Province, Delaware Basin, Wolfcamp Shale and Bone Spring Assessment Units and Input Data

This data release contains the boundaries of assessment units and input data for the assessment of undiscovered oil and gas in the Delaware Basin, Wolfcamp Shale and Bone Spring. The Assessment Unit is the fundamental unit used in the National Assessment Project for the assessment of undiscovered oil and gas resources. The Assessment Unit is defined within the context of the higher-level Total Pet
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Energy Resources Program, Central Energy Resources Science Center

USGS National and Global Oil and Gas Assessment Project-Permian Basin Province, Midland Basin, Wolfcamp Shale Assessment Units

The Assessment Unit is the fundamental unit used in the National Assessment Project for the assessment of undiscovered oil and gas resources. The Assessment Unit is defined within the context of the higher-level Total Petroleum System. The Assessment Unit is shown herein as a geographic boundary interpreted, defined, and mapped by the geologist responsible for the province and incorporates a set o
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Energy Resources Program, Central Energy Resources Science Center
Filter Total Items: 95

Assessment of continuous gas resources in the Horn River Basin, Cordova Embayment, and Liard Basin, Canada, 2019

Using a geology-based assessment methodology, the U.S. Geological Survey estimated undiscovered, technically recoverable mean resources of 135.4 trillion cubic feet of continuous gas in Devonian–Mississippian shales in the Horn River Basin, Cordova Embayment, and Liard Basin of Canada.
Authors
Christopher J. Schenk, Tracey J. Mercier, Cheryl A. Woodall, Thomas M. Finn, Phuong A. Le, Michael E. Brownfield, Kristen R. Marra, Stephanie B. Gaswirth, Heidi M. Leathers-Miller, Janet K. Pitman
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Energy Resources Program, Central Energy Resources Science Center

Structure contour and isopach maps of the Wolfcamp shale and Bone Spring Formation of the Delaware Basin, Permian Basin Province, New Mexico and Texas

A series of structure contour and isopach maps for the Wolfcamp shale and the Bone Spring Formation of the Delaware Basin, Permian Basin Province, were generated in support of the U.S. Geological Survey 2018 assessment of undiscovered continuous oil and gas resources. The interpreted formation tops used to generate the maps are from the IHS Markit® PRODFit™ database, a commercial proprietary datab
Authors
Stephanie B. Gaswirth
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Energy Resources Program, Central Energy Resources Science Center

Assessment of undiscovered oil and gas resources in the Upper Cretaceous Austin Chalk and Tokio and Eutaw Formations, U.S. Gulf Coast, 2019

Using a geology-based assessment methodology, the U.S. Geological Survey estimated undiscovered, technically recoverable mean resources of 6.9 billion barrels of oil and 41.5 trillion cubic feet of natural gas in conventional and continuous accumulations in the Upper Cretaceous Austin Chalk and Tokio and Eutaw Formations onshore and in State waters of the U.S. Gulf Coast region.
Authors
Janet K. Pitman, Stanley T. Paxton, Scott A. Kinney, Katherine J. Whidden, Seth S. Haines, Brian A. Varela, Tracey J. Mercier, Cheryl A. Woodall, Christopher J. Schenk, Heidi M. Leathers-Miller, Ofori N. Pearson, Lauri A. Burke, Phuong A. Le, Justin E. Birdwell, Nicholas J. Gianoutsos, Katherine L. French, Ronald M. Drake, Thomas M. Finn, Geoffrey S. Ellis, Stephanie B. Gaswirth, Kristen R. Marra, Marilyn E. Tennyson, Chilisa M. Shorten
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Energy Resources Program, Central Energy Resources Science Center

Assessment of tight-gas resources in the Grand Erg/Ahnet Province of Algeria, 2019

Using a geology-based assessment methodology, the U.S. Geological Survey estimated undiscovered, technically recoverable mean resources of 30.5 trillion cubic feet of tight gas in the Grand Erg/Ahnet Province of Algeria.
Authors
Michael E. Brownfield, Christopher J. Schenk, Tracey J. Mercier, Marilyn E. Tennyson, Cheryl A. Woodall, Thomas M. Finn, Phuong A. Le, Janet K. Pitman, Ronald M. Drake, Stephanie B. Gaswirth, Heidi M. Leathers-Miller
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Energy Resources Program, Central Energy Resources Science Center

Assessment of undiscovered continuous oil and gas resources in the Upper Ordovician Point Pleasant Formation and Utica Shale of the Appalachian Basin Province, 2019

Using a geology-based assessment methodology, the U.S. Geological Survey estimated undiscovered, technically recoverable continuous mean resources of 1.8 billion barrels of oil and 117.2 trillion cubic feet of gas in the Upper Ordovician Point Pleasant Formation and Utica Shale of the Appalachian Basin Province.
Authors
Catherine B. Enomoto, Michael H. Trippi, Debra K. Higley, Ronald M. Drake, Stephanie B. Gaswirth, Tracey J. Mercier, Michael E. Brownfield, Heidi M. Leathers-Miller, Phuong A. Le, Kristen R. Marra, Marilyn E. Tennyson, Cheryl A. Woodall, Christopher J. Schenk
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Energy Resources Program, Geology, Energy & Minerals Science Center, Central Energy Resources Science Center

Assessment of undiscovered gas hydrate resources in the North Slope of Alaska, 2018

Using a geology-based assessment methodology, the U.S. Geological Survey estimated undiscovered, technically recoverable mean resources of about 54 trillion cubic feet of gas resources within gas hydrates in the North Slope of Alaska.
Authors
Timothy S. Collett, Kristen A. Lewis, Margarita V. Zyrianova, Seth S. Haines, Christopher J. Schenk, Tracey J. Mercier, Michael E. Brownfield, Stephanie B. Gaswirth, Kristen R. Marra, Heidi M. Leathers-Miller, Janet K. Pitman, Marilyn E. Tennyson, Cheryl A. Woodall, David W. Houseknecht
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Energy Resources Program, Central Energy Resources Science Center

Assessment of continuous oil resources in the Eastern Great Basin Province of Nevada, Utah, and Idaho, 2018

The U.S. Geological Survey (USGS) quantitatively assessed the potential for undiscovered, technically recoverable continuous oil and gas resources in the Eastern Great Basin Province (Anna and others, 2007) of Nevada, Utah, and Idaho (fig. 1). The assessment focused on the area of the province between the Roberts Mountains and Sevier thrust systems (Peterson, 1994). The major petroleum source rock
Authors
Christopher J. Schenk, Tracey J. Mercier, Cheryl A. Woodall, Thomas M. Finn, Stephanie B. Gaswirth, Kristen R. Marra, Phuong A. Le, Michael E. Brownfield, Heidi M. Leathers-Miller, Ronald M. Drake, Scott A. Kinney
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Energy Resources Program, Central Energy Resources Science Center

Assessment of shale-oil resources of the Sirte Basin Province, Libya, 2019

Using a geology-based assessment methodology, the U.S. Geological Survey estimated undiscovered, technically recoverable mean resources of 23.7 billion barrels of shale oil and 23 trillion cubic feet of associated gas in the onshore part of the Sirte Basin Province of Libya.
Authors
Christopher J. Schenk, Tracey J. Mercier, Cheryl A. Woodall, Phuong A. Le, Janet K. Pitman, Ronald M. Drake, Michael E. Brownfield, Stephanie B. Gaswirth, Thomas M. Finn
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Energy Resources Program, Geology, Energy & Minerals Science Center, Central Energy Resources Science Center

Assessment of undiscovered conventional oil and gas resources of the Grand Erg/Ahnet Province, Algeria, 2018

Using a geology-based assessment methodology, the U.S. Geological Survey estimated undiscovered, technically recoverable mean resources of 378 million barrels of oil and 7 trillion cubic feet of gas in the Grand Erg/Ahnet Province of Algeria.
Authors
Christopher J. Schenk, Tracey J. Mercier, Marilyn E. Tennyson, Thomas M. Finn, Phuong A. Le, Janet K. Pitman, Ronald M. Drake, Michael E. Brownfield, Stephanie B. Gaswirth, Heidi M. Leathers-Miller
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Energy Resources Program, Central Energy Resources Science Center

Assessment of Undiscovered Oil and Gas Resources of the Reggane Basin Province, Algeria, 2018

Using a geology-based assessment methodology, the U.S. Geological Survey estimated undiscovered, technically recoverable mean resources of 1.3 billion barrels of oil and 63 trillion cubic feet of gas in the Reggane Basin Province of Algeria.
Authors
Christopher J. Schenk, Michael E. Brownfield, Tracey J. Mercier, Cheryl A. Woodall, Phuong A. Le, Marilyn E. Tennyson, Thomas M. Finn, Kristen R. Marra, Stephanie B. Gaswirth, Heidi M. Leathers-Miller, Janet K. Pitman, Ronald M. Drake
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Energy Resources Program, Central Energy Resources Science Center

Assessment of undiscovered continuous tight-gas resources in the Mesaverde Group and Wasatch Formation, Uinta-Piceance Province, Utah and Colorado, 2018

Using a geology-based assessment methodology, the U.S. Geological Survey estimated undiscovered, technically recoverable mean resources of 24 trillion cubic feet of gas in the Mesaverde Group and Wasatch Formation of the Uinta-Piceance Province in northeast Utah and northwest Colorado.
Authors
Ronald M. Drake, Christopher J. Schenk, Tracey J. Mercier, Phuong A. Le, Thomas M. Finn, Ronald C. Johnson, Cheryl A. Woodall, Stephanie B. Gaswirth, Kristen R. Marra, Janet K. Pitman, Heidi M. Leathers-Miller, Seth S. Haines, Marilyn E. Tennyson
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Energy Resources Program, Central Energy Resources Science Center

Assessment of undiscovered oil and gas resources in the Tindouf Basin Province, North Africa, 2018

Using a geology-based assessment methodology, the U.S. Geological Survey estimated undiscovered, technically recoverable mean resources of 2.6 billion barrels of oil and 123.9 trillion cubic feet of gas in the Tindouf Basin Province of North Africa.
Authors
Michael E. Brownfield, Christopher J. Schenk, Tracey J. Mercier, Cheryl A. Woodall, Phuong A. Le, Marilyn E. Tennyson, Thomas M. Finn, Stephanie B. Gaswirth, Janet K. Pitman, Kristen R. Marra, Heidi M. Leathers-Miller, Ronald M. Drake
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Energy Resources Program, Central Energy Resources Science Center
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USGS Announces Largest Continuous Oil Assessment in Texas and New Mexico

Estimates Include 46.3 Billion Barrels of Oil, 281 Trillion Cubic feet of Natural Gas, and 20 Billion Barrels of Natural Gas Liquids in Texas and New...

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USGS Estimates 20 Billion Barrels of Oil in Texas’ Wolfcamp Shale Formation

This is the largest estimate of continuous oil that USGS has ever assessed in the United States.

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Image: Bakken Drill Rig
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Image: Bakken Drill Rig
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Science and Products

*Disclaimer: Listing outside positions with professional scientific organizations on this Staff Profile are for informational purposes only and do not constitute an endorsement of those professional scientific organizations or their activities by the USGS, Department of the Interior, or U.S. Government