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United States Assessments of Undiscovered Oil and Gas Resources

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By Central Energy Resources Science Center August 6, 2024

Explore US Undiscovered Oil and Gas Assessment Provinces

Assessment results, publications, data and more are available

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USGS Energy Resources Program provides periodic assessments of the oil and natural gas endowment of the United States and the World.  This website provides access to new, prioritized, assessment results and supporting data for the United States, as part of the Energy Policy and Conservation Act (EPCA).

Assessment Overview

Image shows a map of the assessment units of the 2018 Delaware Basin oil and gas assessment

The USGS assesses potential for undiscovered oil and gas resources in priority geologic provinces in the United States.  This website highlights conventional and unconventional (continuous) oil and gas assessments.

Summary of Continuous Assessments

Interactive map and chart highlighting USGS Domestic Continuous (Unconventional) Oil & Gas Assessments, 2000-Present

This applications shows maps and tables of all continuous assessments in the United States.

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Recent Assessments

Below are the latest US Assessments:

Browse Assessments

National Oil and Gas Assessment Methodology

The U.S. Geological Survey Energy Resources Program assesses the potential for undiscovered oil and gas resources in priority geologic provinces in the United States and around the world (click here for information about World Oil and Gas Assessments). Two methodologies are used by the USGS; one for assessing conventional oil and gas resources and one for assessing unconventional (continuous) oil and gas resources (such as shale gas and coalbed gas).  USGS publications detailing and explaining the conventional and continuous assessment methodologies are provided below.  These methodologies have been subjected to rigorous peer reviews by non federal panels, and the two panel reports are provided on this page.

 

Conventional Resources

USGS Reports

U.S. Geological Survey Assessment Concepts for Conventional Petroleum Accumulations
By James W. Schmoker and T.R. Klett

U.S. Geological Survey Input-Data Form and Operational Procedure for the Assessment of Conventional Petroleum Accumulations
By T.R. Klett, James W. Schmoker, and Ronald R. Charpentier

A Monte Carlo Simulation Method for the Assessment of Undiscovered, Conventional Oil and Gas
By Ronald R. Charpentier and T.R. Klett

 

Continuous Resources

USGS Reports

U.S. Geological Survey Assessment Concepts for Continuous Petroleum Accumulations
By James W. Schmoker

U.S. Geological Survey Input-Data Form and Operational Procedure for the Assessment Of Continuous Petroleum Accumulations, 2002
By T.R. Klett and James W. Schmoker

Analytic Resource Assessment Method for Continuous Petroleum Accumulations—The ACCESS Assessment Method
By Robert A. Crovelli

FORSPAN Model Users Guide
By T.R. Klett, and Ronald R. Charpentier
 

Methodology Revisions

Improved USGS methodology for assessing continuous petroleum resources.
Charpentier, R.R., and Cook, T.A.

Applying Probabilistic Well-Performance Parameters to Assessments of Shale-Gas Resources
By Ronald R. Charpentier and Troy Cook

Assembling Probabilistic Performance Parameters of Shale-Gas Wells
By Cook, Troy, and Charpentier, R.R.

USGS Methodology for Assessing Continuous Petroleum Resources
By Ronald R. Charpentier and Troy Cook

New U.S. Geological Survey Method for the Assessment of Reserve Growth
By Timothy R. Klett, Emil D. Attanasi, Ronald R. Charpentier, Troy A. Cook, Philip A. Freeman, Donald L. Gautier, Phuong A. Le, Robert T. Ryder, Christopher J. Schenk, Marilyn E. Tennyson, and Mahendra K. Verma (Reserve Growth Assessment Team)

Variability of Distributions of Well-Scale Estimated Ultimate Recovery for Continuous (Unconventional) Oil and Gas Resources in the United States 
By U.S. Geological Survey Oil and Gas Assessment Team

Peer Review

American Association of Petroleum Geologists Committee on Resource Evaluation (CORE) Subcommittee to review the United States Onshore Continuous (Unconventional) Gas Assessment Methodology Used by the USGS

 

Reserve Growth Methodology

USGS Reports

New U.S. Geological Survey Method for the Assessment of Reserve Growth
By Reserve Growth Assessment Team

Reserve Growth of Oil and Gas Fields - Investigations and Applications
By Troy Cook

Peer Review

American Association of Petroleum Geologists Committee on Resource Evaluation (CORE) Subcommittee to review the Growth-to-Known Reserves

 

Below are a list of recent assessment areas.  You can also use the National Oil and Gas Assessment Map to browse these assessments.

Filter Total Items: 59
Province 5066 Cincinnati Arch, National Oil and Gas Assessments

Cincinnati Arch Oil and Gas Assessments

The U.S. Geological Survey completed the following assessments of undiscovered oil and gas resources of the Cincinnati Arch Province (5066) :
By
Geology, Energy, and Minerals Mission Area, Energy Resources Program, Central Energy Resources Science Center
Cincinnati Arch Oil and Gas Assessments

Cincinnati Arch Oil and Gas Assessments

The U.S. Geological Survey completed the following assessments of undiscovered oil and gas resources of the Cincinnati Arch Province (5066) :
Learn More
Province 5062 Arkoma Basin, National Oil and Gas Assessments

Arkoma Basin Oil and Gas Assessments

The U.S. Geological Survey completed the following assessments of undiscovered oil and gas resources of the Arkoma Basin Province 5062.
By
Geology, Energy, and Minerals Mission Area, Energy Resources Program, Central Energy Resources Science Center
Arkoma Basin Oil and Gas Assessments

Arkoma Basin Oil and Gas Assessments

The U.S. Geological Survey completed the following assessments of undiscovered oil and gas resources of the Arkoma Basin Province 5062.
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Province 5061 Southern Oklahoma Oil and Gas Assessments

Southern Oklahoma Oil and Gas Assessments

The U.S. Geological Survey completed the following assessments of undiscovered continuous oil and gas resources of the Southern Oklahoma Province (5061).
By
Geology, Energy, and Minerals Mission Area, Energy Resources Program, Central Energy Resources Science Center
Southern Oklahoma Oil and Gas Assessments

Southern Oklahoma Oil and Gas Assessments

The U.S. Geological Survey completed the following assessments of undiscovered continuous oil and gas resources of the Southern Oklahoma Province (5061).
Learn More
Province 5056 Forest City Basin Oil and Gas Assessment

Forest City Basin Oil and Gas Assessments

The U.S. Geological Survey completed the following assessments of undiscovered oil and gas potential of the Forest City Basin Province (5056).
By
Geology, Energy, and Minerals Mission Area, Energy Resources Program, Central Energy Resources Science Center
Forest City Basin Oil and Gas Assessments

Forest City Basin Oil and Gas Assessments

The U.S. Geological Survey completed the following assessments of undiscovered oil and gas potential of the Forest City Basin Province (5056).
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Province 5059 Sedgwick Basin, Oil and Gas Assessments

Sedgwick Basin Oil and Gas Assessments

Province Code: 5059 The Salina Basin Province (5059), covers an area of about 45,000 sq mi, consisting of the eastern half of Nebraska and the north-central portion of Kansas. The basin lies between the Cambridge Arch-Central Kansas Uplift Province (5053) on the west, the Nemaha Uplift Province (5055) to the east, the Sioux Arch Province (5032) to the north, and a poorly defined structural saddle...
By
Geology, Energy, and Minerals Mission Area, Energy Resources Program, Central Energy Resources Science Center
Sedgwick Basin Oil and Gas Assessments

Sedgwick Basin Oil and Gas Assessments

Province Code: 5059 The Salina Basin Province (5059), covers an area of about 45,000 sq mi, consisting of the eastern half of Nebraska and the north-central portion of Kansas. The basin lies between the Cambridge Arch-Central Kansas Uplift Province (5053) on the west, the Nemaha Uplift Province (5055) to the east, the Sioux Arch Province (5032) to the north, and a poorly defined structural saddle...
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Province 5057 Ozark Uplift Province, Oil and Gas Assessments

Ozark Uplift Oil and Gas Assessments

The U.S. Geological Survey completed the following assessments of undiscovered oil and gas potential of the Ozark Uplift Province (5057).
By
Geology, Energy, and Minerals Mission Area, Energy Resources Program, Central Energy Resources Science Center
Ozark Uplift Oil and Gas Assessments

Ozark Uplift Oil and Gas Assessments

The U.S. Geological Survey completed the following assessments of undiscovered oil and gas potential of the Ozark Uplift Province (5057).
Learn More
Nemaha Uplift Province 5055 National Oil and Gas Assessment

Nemaha Uplift Province Oil and Gas Assessment

The U.S. Geological Survey completed the following assessments of undiscovered oil and gas potential of the Nemaha Uplift Province (5055).
By
Geology, Energy, and Minerals Mission Area, Energy Resources Program, Central Energy Resources Science Center
Nemaha Uplift Province Oil and Gas Assessment

Nemaha Uplift Province Oil and Gas Assessment

The U.S. Geological Survey completed the following assessments of undiscovered oil and gas potential of the Nemaha Uplift Province (5055).
Learn More
Cambridge Arch-Central Kansas Uplift (5053) National Oil and Gas Assessment

Cambridge Arch-Central Kansas Uplift Oil and Gas Assessment

The U.S. Geological Survey completed the following assessments of undiscovered oil and gas potential of the Cambridge Arch/Central Kansas Uplift Province (5053).
By
Geology, Energy, and Minerals Mission Area, Energy Resources Program, Central Energy Resources Science Center
Cambridge Arch-Central Kansas Uplift Oil and Gas Assessment

Cambridge Arch-Central Kansas Uplift Oil and Gas Assessment

The U.S. Geological Survey completed the following assessments of undiscovered oil and gas potential of the Cambridge Arch/Central Kansas Uplift Province (5053).
Learn More
Province 5052 Iowa Shelf Basin - National Oil and Gas Assessment

Iowa Shelf Oil and Gas Assessments

The U.S. Geological Survey completed the following assessments of undiscovered oil and gas potential of the Iowa Shelf Province (5052).
By
Geology, Energy, and Minerals Mission Area, Energy Resources Program, Central Energy Resources Science Center
Iowa Shelf Oil and Gas Assessments

Iowa Shelf Oil and Gas Assessments

The U.S. Geological Survey completed the following assessments of undiscovered oil and gas potential of the Iowa Shelf Province (5052).
Learn More
Province 5046 Marathon Thrust Belt National Oil and Gas Assessments

Marathon Thrust Belt Oil and Gas Assessments

The U.S. Geological Survey completed the following assessments of undiscovered oil and gas resources of the Marathon Thrust Belt province 5046 in southwestern Texas.
By
Geology, Energy, and Minerals Mission Area, Energy Resources Program, Central Energy Resources Science Center
Marathon Thrust Belt Oil and Gas Assessments

Marathon Thrust Belt Oil and Gas Assessments

The U.S. Geological Survey completed the following assessments of undiscovered oil and gas resources of the Marathon Thrust Belt province 5046 in southwestern Texas.
Learn More
Superior 5051 Oil and Gas Assessment Basin

Superior Oil and Gas Assessments

The U.S. Geological Survey completed the following assessment of undiscovered oil and gas potential of the Superior Province 5051.
By
Geology, Energy, and Minerals Mission Area, Energy Resources Program, Central Energy Resources Science Center
Superior Oil and Gas Assessments

Superior Oil and Gas Assessments

The U.S. Geological Survey completed the following assessment of undiscovered oil and gas potential of the Superior Province 5051.
Learn More
Province 5043 Palo Duro Basin National Oil and Gas Assessments

Palo Duro Basin Oil and Gas Assessments

The U.S. Geological Survey completed the following assessments of undiscovered oil and gas resources of the Palo Duro Basin Province 5043 in Texas, New Mexico, and Oklahoma.
By
Geology, Energy, and Minerals Mission Area, Energy Resources Program, Central Energy Resources Science Center
Palo Duro Basin Oil and Gas Assessments

Palo Duro Basin Oil and Gas Assessments

The U.S. Geological Survey completed the following assessments of undiscovered oil and gas resources of the Palo Duro Basin Province 5043 in Texas, New Mexico, and Oklahoma.
Learn More

Below are datasets related to the National Oil and Gas Assessments.  

Legacy downloadable data
Filter Total Items: 55

USGS National and Global Oil and Gas Assessment Project- Gulf Coast Smackover Conventional Oil and Gas Assessment Unit Boundaries, Assessment Input Data, and Fact Sheet Data Tables USGS National and Global Oil and Gas Assessment Project- Gulf Coast Smackover Conventional Oil and Gas Assessment Unit Boundaries, Assessment Input Data, and Fact Sheet Data Tables

This data release contains the boundaries of assessment units and input data for the assessment of undiscovered conventional oil and gas resources in the Smackover formation in the U.S. Gulf Coast. 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...
By
Central Energy Resources Science Center

New Source Rock Data for the Niobrara and Sage Breaks intervals of the lower Cody Shale in the Wyoming part of the Bighorn Basin New Source Rock Data for the Niobrara and Sage Breaks intervals of the lower Cody Shale in the Wyoming part of the Bighorn Basin

In 2019 the U.S. Geological Survey (USGS) quantitively assessed the potential for undiscovered, technically recoverable continuous (unconventional) oil and gas resources in the Niobrara interval of the Cody Shale in the Bighorn Basin Province (Finn and others, 2019). Leading up to the assessment, in 2017, the USGS collected samples from the Niobrara and underlying Sage Breaks intervals...
By
Central Energy Resources Science Center

New Source Rock Data for the Lewis Shale from the eastern part of the Southwestern Wyoming Province, Wyoming and Colorado New Source Rock Data for the Lewis Shale from the eastern part of the Southwestern Wyoming Province, Wyoming and Colorado

In 2021 the United States Geological Survey (USGS) sampled the lower part of the Upper Cretaceous Lewis Shale in the eastern part of the Southwestern Wyoming Province to better characterize its petroleum source rock potential for an upcoming resource assessment. Ninety-five samples from 24 wells were collected from well cuttings of the lower part of the Lewis Shale stored at the U.S...
By
Central Energy Resources Science Center

USGS Gulf Coast Geologic Energy Assessments and Research Project-Upper Jurassic Smackover Formation Continuous Resources: Assessment Unit Boundaries, Assessment Input Data, and Fact Sheet Data Tables USGS Gulf Coast Geologic Energy Assessments and Research Project-Upper Jurassic Smackover Formation Continuous Resources: Assessment Unit Boundaries, Assessment Input Data, and Fact Sheet Data Tables

This data release contains the boundaries of assessment units and input data for the assessment of undiscovered continuous oil and gas resources in the Smackover formation in the U.S. Gulf Coast. 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...
By
Central Energy Resources Science Center

Compilation of total organic carbon and pyrolysis analysis data for Cretaceous marine shales in the Raton Basin-Sierra Grande Uplift Province, Colorado and New Mexico Compilation of total organic carbon and pyrolysis analysis data for Cretaceous marine shales in the Raton Basin-Sierra Grande Uplift Province, Colorado and New Mexico

This compilation presents total organic carbon and pyrolysis analysis data for the Pierre Shale, Niobrara Formation, and other Cretaceous marine shales in the Raton Basin-Sierra Grande Uplift Province. The data was used to characterize these potential source rock intervals in support of the oil and gas resource assessment in the province. The data was compiled from the publicly available...
By
Central Energy Resources Science Center

USGS National and Global Oil and Gas Assessment Project - Raton Basin-Sierra Grande Uplift Province: Assessment Unit Boundaries, Assessment Input Data, and Fact Sheet Data Tables USGS National and Global Oil and Gas Assessment Project - Raton Basin-Sierra Grande Uplift Province: Assessment Unit Boundaries, Assessment Input Data, and Fact Sheet Data Tables

This data release contains the boundaries of assessment units and input data for the assessment of coalbed gas resources in the Raton Basin-Sierra Grande Uplift Province, Colorado and New Mexico. 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...
By
Central Energy Resources Science Center

USGS National and Global Oil and Gas Assessment Project—Northwest Montana Bakken Formation: Assessment Unit Boundaries, Assessment Input Data, and Fact Sheet Data Tables USGS National and Global Oil and Gas Assessment Project—Northwest Montana Bakken Formation: Assessment Unit Boundaries, Assessment Input Data, and Fact Sheet Data Tables

This data release contains the boundaries of assessment units and input data for the assessment of undiscovered continuous oil and gas resources in the Bakken formation of Northwest Montana. 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...
By
Central Energy Resources Science Center

Data release for the 3D petroleum systems model of the Williston Basin, USA Data release for the 3D petroleum systems model of the Williston Basin, USA

This data release contains data associated with the journal article "Modeling the maturation history of the stacked petroleum systems of the Williston Basin, USA". Collectively, the data release includes 13 child items and metadata files that provide detailed descriptions of the attributes, processing steps, and original data sources. There is also a data table, "Williston_Basin_Data...
By
Central Energy Resources Science Center

New source rock data for the Mowry and Thermopolis Shales in the Wind River Basin, Wyoming New source rock data for the Mowry and Thermopolis Shales in the Wind River Basin, Wyoming

In 2020, the U.S. Geological Survey (USGS) assessed the potential for undiscovered, technically recoverable continuous (unconventional) oil and gas resources in the Mowry Shale in the Wind River Basin Province (Finn and others, 2021). To better characterize the source rock potential of the Mowry Shale and associated strata, 129 samples were collected from 45 wells from the well cuttings...
By
Central Energy Resources Science Center

Total organic carbon and pyrolysis analysis data for the Rock Well Petroleum core #8, southern Casper arch, Natrona County, Wyoming Total organic carbon and pyrolysis analysis data for the Rock Well Petroleum core #8, southern Casper arch, Natrona County, Wyoming

In 2006, Rock Well Petroleum drilled and logged nearly 1,600 feet (ft) of continuous core on the southern part of the Casper arch in Natrona County, Wyoming (see fig1.png). The core hole, named the Poison Spider core #8 penetrated the interval extending from the Upper Cretaceous Frontier Formation to the Triassic Alcova Limestone. The core was subsequently donated to the U.S. Geological...
By
Central Energy Resources Science Center

USGS National and Global Oil and Gas Assessment Project-U.S. Gulf Coast, Deep Tuscaloosa Conventional Gas: Assessment Unit Boundary, Assessment Input Data, and Fact Sheet Data Tables USGS National and Global Oil and Gas Assessment Project-U.S. Gulf Coast, Deep Tuscaloosa Conventional Gas: Assessment Unit Boundary, Assessment Input Data, and Fact Sheet Data Tables

This data release contains the boundaries of assessment units and input data for the assessment of undiscovered Deep Tuscaloosa Group sandstones conventional gas resources in the U.S. Gulf Coast in Louisiana and Mississippi. 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...
By
Energy Resources Program, Central Energy Resources Science Center, Geology, Energy & Minerals Science Center

Aggregated Oil and Natural Gas Drilling and Production History of the United States (ver. 1.1, April 2023) Aggregated Oil and Natural Gas Drilling and Production History of the United States (ver. 1.1, April 2023)

This data release provides several datasets that provide an overview of oil and gas well history and production of the United States, from 1817 to September 1, 2022. Well history data is aggregated into 1- and 10-mile squares indicating the total number of wells and counts of wells classified as oil, gas, dry, injection, hydraulically fractured, and/or horizontal wells. Well history is...
By
Central Energy Resources Science Center

Below are publications associated with this project.

Filter Total Items: 107

Assessment of coalbed gas resources in the Raton Basin-Sierra Grande Uplift Province, Colorado and New Mexico, 2022 Assessment of coalbed gas resources in the Raton Basin-Sierra Grande Uplift Province, Colorado and New Mexico, 2022

Using a geology-based assessment methodology, the U.S. Geological Survey estimated a mean of 5.2 trillion cubic feet of coalbed gas in the Vermejo Formation and Raton Formation of the Raton Basin-Sierra Grande Uplift Province.
Authors
Christopher Schenk, Thomas Finn, Tracey J. Mercier, Cheryl Woodall, Phuong A. Le, Andrea Cicero, Ronald M. Drake, Geoffrey Ellis, Michael Gardner, Sarah Gelman, Jane Hearon, Benjamin Johnson, Jenny Lagesse, Heidi M. Leathers-Miller, Kristen Marra, Kira Timm, Scott Young
By
Energy Resources Program, Central Energy Resources Science Center

Assessment of continuous oil and gas resources in the Bakken Formation of northwest Montana, 2022 Assessment of continuous oil and gas resources in the Bakken Formation of northwest Montana, 2022

Using a geology-based assessment methodology, the U.S. Geological Survey estimated means of 220 million barrels of continuous oil and 1 trillion cubic feet of continuous gas in the Bakken Formation of northwest Montana.
Authors
Christopher Schenk, Michael Gardner, Tracey J. Mercier, Cheryl Woodall, Phuong A. Le, Andrea Cicero, Ronald M. Drake, Geoffrey Ellis, Thomas Finn, Sarah Gelman, Jane Hearon, Benjamin Johnson, Jenny Lagesse, Heidi M. Leathers-Miller, Kristen Marra, Kira Timm, Scott Young
By
Energy Resources Program, Central Energy Resources Science Center

Assessment of undiscovered conventional gas resources in the Deep Tuscaloosa Group Sandstones of the Western Gulf Basin Province, U.S. Gulf Coast region, 2021 Assessment of undiscovered conventional gas resources in the Deep Tuscaloosa Group Sandstones of the Western Gulf Basin Province, U.S. Gulf Coast region, 2021

Using a geology-based assessment methodology, the U.S. Geological Survey estimated undiscovered, technically recoverable mean resources of 14,785 billion cubic feet of gas resources in the Western Gulf Basin Province, U.S. Gulf Coast region.
Authors
Matthew D. Merrill, Catherine Enomoto
By
Energy Resources Program, Central Energy Resources Science Center, Geology, Energy & Minerals Science Center

Assessment of undiscovered conventional oil and gas resources of the Montana Thrust Belt Province, 2021 Assessment of undiscovered conventional oil and gas resources of the Montana Thrust Belt Province, 2021

Using a geology-based assessment methodology, the U.S. Geological Survey estimated means of 783 million barrels of conventional oil and 17,606 billion (17.6 trillion) cubic feet of conventional gas in the Montana Thrust Belt Province.
Authors
Christopher Schenk, Tracey J. Mercier, Cheryl Woodall, Phuong A. Le, Andrea Cicero, Ronald M. Drake, Geoffrey Ellis, Thomas Finn, Michael Gardner, Sarah Gelman, Jane Hearon, Benjamin Johnson, Jenny Lagesse, Heidi M. Leathers-Miller, Kristen Marra, Kira Timm, Scott Young
By
Energy Resources Program, Central Energy Resources Science Center

Assessment of undiscovered continuous oil resources in the Bakken and Three Forks Formations of the Williston Basin Province, North Dakota and Montana, 2021 Assessment of undiscovered continuous oil resources in the Bakken and Three Forks Formations of the Williston Basin Province, North Dakota and Montana, 2021

Using a geology-based assessment methodology, the U.S. Geological Survey estimated undiscovered, technically recoverable mean resources of 4.3 billion barrels of oil and 4.9 trillion cubic feet of gas (associated) in the Bakken and Three Forks Formations of the Williston Basin Province, North Dakota and Montana.
Authors
Kristen Marra, Tracey J. Mercier, Sarah Gelman, Christopher Schenk, Cheryl Woodall, Andrea Cicero, Ronald M. Drake, Geoffrey Ellis, Thomas Finn, Michael Gardner, Jane Hearon, Benjamin Johnson, Jenny Lagesse, Phuong A. Le, Heidi M. Leathers-Miller, Kira Timm, Scott Young
By
Energy Resources Program, Central Energy Resources Science Center

Assessment of undiscovered gas resources in the Williston Basin Province, 2020 Assessment of undiscovered gas resources in the Williston Basin Province, 2020

Using a geology-based assessment methodology, the U.S. Geological Survey estimated a mean of 2,438 billion (2.4 trillion) cubic feet of gas resources in the Williston Basin Province, in North Dakota, Montana, and South Dakota.
Authors
Christopher Schenk, Tracey J. Mercier, Cheryl Woodall, Geoffrey Ellis, Thomas Finn, Phuong A. Le, Kristen Marra, Heidi Leathers-Miller, Ronald M. Drake
By
Energy Resources Program, Central Energy Resources Science Center

Assessment of undiscovered conventional oil and gas resources in the lower Paleozoic of the Williston Basin Province, 2020 Assessment of undiscovered conventional oil and gas resources in the lower Paleozoic of the Williston Basin Province, 2020

Using a geology-based assessment methodology, the U.S. Geological Survey estimated undiscovered, technically recoverable mean resources of 83 million barrels of oil and 351 billion cubic feet of gas in lower Paleozoic strata of the Williston Basin Province, North Dakota, Montana, and South Dakota.
Authors
Christopher Schenk, Tracey Mercier, Cheryl Woodall, Geoffrey Ellis, Thomas Finn, Phuong Le, Kristen Marra, Heidi Leathers-Miller, Ronald M. Drake
By
Energy Resources Program, Central Energy Resources Science Center

Assessment of undiscovered oil and gas resources in the Pennsylvanian Tyler Formation of the Williston Basin Province, 2020 Assessment of undiscovered oil and gas resources in the Pennsylvanian Tyler Formation of the Williston Basin Province, 2020

Using a geology-based assessment methodology, the U.S. Geological Survey estimated undiscovered, technically recoverable mean resources of 161 million barrels of oil and 93 billion cubic feet of gas in the Tyler Formation of the Williston Basin Province, North Dakota.
Authors
Christopher Schenk, Tracey Mercier, Cheryl Woodall, Thomas Finn, Phuong Le, Kristen Marra, Geoffrey Ellis, Heidi M. Leathers-Miller, Ronald M. Drake
By
Energy Resources Program, Central Energy Resources Science Center

Assessment of undiscovered conventional oil and gas resources of upper Paleozoic strata in the Williston Basin Province, 2020 Assessment of undiscovered conventional oil and gas resources of upper Paleozoic strata in the Williston Basin Province, 2020

Using a geology-based assessment methodology, the U.S. Geological Survey estimated undiscovered, technically recoverable mean oil and gas resources of 134 million barrels of oil and 81 billion cubic feet of gas in upper Paleozoic strata of the Williston Basin Province in North Dakota, Montana, and South Dakota.
Authors
Christopher Schenk, Tracey J. Mercier, Cheryl Woodall, Geoffrey Ellis, Thomas Finn, Phuong A. Le, Kristen Marra, Heidi Leathers-Miller, Ronald M. Drake
By
Energy Resources Program, Central Energy Resources Science Center

Assessment of undiscovered gas resources in Upper Devonian to Lower Cretaceous strata of the western North Slope, Alaska, 2021 Assessment of undiscovered gas resources in Upper Devonian to Lower Cretaceous strata of the western North Slope, Alaska, 2021

Using a geology-based assessment methodology, the U.S. Geological Survey estimated a mean of 1,407 billion (1.4 trillion) cubic feet of gas in conventional accumulations in Upper Devonian to Lower Cretaceous strata of the western North Slope, Alaska.
Authors
David Houseknecht, Tracey Mercier, Christopher Schenk, Thomas Moore, William Rouse, Julie Dumoulin, William Craddock, Richard Lease, Palma Botterell, Margaret Sanders, Rebecca Smith, Christopher Connors, Christopher Garrity, Katherine Whidden, Jared Gooley, John Counts, Joshua Long, Christina DeVera
By
Geology, Energy, and Minerals Mission Area, Ecosystems Mission Area, Energy Resources Program, Alaska Science Center, Central Energy Resources Science Center, Geology, Energy & Minerals Science Center

Assessment of continuous gas resources in the Horn River Basin, Cordova Embayment, and Liard Basin, Canada, 2019 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 Schenk, Tracey J. Mercier, Cheryl Woodall, Thomas Finn, Phuong A. Le, Michael Brownfield, Kristen Marra, Stephanie Gaswirth, Heidi Leathers-Miller, Janet K. Pitman
By
Energy Resources Program, Central Energy Resources Science Center

Assessment of continuous oil and gas resources in the Mowry Shale, Wind River Basin Province, Wyoming, 2020 Assessment of continuous oil and gas resources in the Mowry Shale, Wind River Basin Province, Wyoming, 2020

Using a geology-based assessment methodology, the U.S. Geological Survey estimated undiscovered, technically recoverable mean resources of 288 million barrels of oil and 2.6 trillion cubic feet of gas in the Mowry Shale in the Wind River Basin Province, Wyoming.
Authors
Thomas Finn, Christopher Schenk, Tracey J. Mercier, Cheryl Woodall, Marilyn Tennyson, Kristen Marra, Phuong A. Le, Heidi Leathers-Miller, Geoffrey Ellis
By
Energy Resources Program, Central Energy Resources Science Center

Below are datasets related to the National Oil and Gas Assessments.  

Below are news stories associated with this project.

Below are FAQ associated with this project.

Below are partners associated with this project.

Bureau of Land Management (BLM) Bureau of Land Management (BLM)

Bureau of Ocean Energy Management (BOEM) Bureau of Ocean Energy Management (BOEM)

U.S. Department of Energy (DOE) U.S. Department of Energy (DOE)

USGS Energy Resources Program provides periodic assessments of the oil and natural gas endowment of the United States and the World.  This website provides access to new, prioritized, assessment results and supporting data for the United States, as part of the Energy Policy and Conservation Act (EPCA).

Assessment Overview

Image shows a map of the assessment units of the 2018 Delaware Basin oil and gas assessment

The USGS assesses potential for undiscovered oil and gas resources in priority geologic provinces in the United States.  This website highlights conventional and unconventional (continuous) oil and gas assessments.

Summary of Continuous Assessments

Interactive map and chart highlighting USGS Domestic Continuous (Unconventional) Oil & Gas Assessments, 2000-Present

This applications shows maps and tables of all continuous assessments in the United States.

Click here to launch

Recent Assessments

Below are the latest US Assessments:

Browse Assessments

National Oil and Gas Assessment Methodology

The U.S. Geological Survey Energy Resources Program assesses the potential for undiscovered oil and gas resources in priority geologic provinces in the United States and around the world (click here for information about World Oil and Gas Assessments). Two methodologies are used by the USGS; one for assessing conventional oil and gas resources and one for assessing unconventional (continuous) oil and gas resources (such as shale gas and coalbed gas).  USGS publications detailing and explaining the conventional and continuous assessment methodologies are provided below.  These methodologies have been subjected to rigorous peer reviews by non federal panels, and the two panel reports are provided on this page.

 

Conventional Resources

USGS Reports

U.S. Geological Survey Assessment Concepts for Conventional Petroleum Accumulations
By James W. Schmoker and T.R. Klett

U.S. Geological Survey Input-Data Form and Operational Procedure for the Assessment of Conventional Petroleum Accumulations
By T.R. Klett, James W. Schmoker, and Ronald R. Charpentier

A Monte Carlo Simulation Method for the Assessment of Undiscovered, Conventional Oil and Gas
By Ronald R. Charpentier and T.R. Klett

 

Continuous Resources

USGS Reports

U.S. Geological Survey Assessment Concepts for Continuous Petroleum Accumulations
By James W. Schmoker

U.S. Geological Survey Input-Data Form and Operational Procedure for the Assessment Of Continuous Petroleum Accumulations, 2002
By T.R. Klett and James W. Schmoker

Analytic Resource Assessment Method for Continuous Petroleum Accumulations—The ACCESS Assessment Method
By Robert A. Crovelli

FORSPAN Model Users Guide
By T.R. Klett, and Ronald R. Charpentier
 

Methodology Revisions

Improved USGS methodology for assessing continuous petroleum resources.
Charpentier, R.R., and Cook, T.A.

Applying Probabilistic Well-Performance Parameters to Assessments of Shale-Gas Resources
By Ronald R. Charpentier and Troy Cook

Assembling Probabilistic Performance Parameters of Shale-Gas Wells
By Cook, Troy, and Charpentier, R.R.

USGS Methodology for Assessing Continuous Petroleum Resources
By Ronald R. Charpentier and Troy Cook

New U.S. Geological Survey Method for the Assessment of Reserve Growth
By Timothy R. Klett, Emil D. Attanasi, Ronald R. Charpentier, Troy A. Cook, Philip A. Freeman, Donald L. Gautier, Phuong A. Le, Robert T. Ryder, Christopher J. Schenk, Marilyn E. Tennyson, and Mahendra K. Verma (Reserve Growth Assessment Team)

Variability of Distributions of Well-Scale Estimated Ultimate Recovery for Continuous (Unconventional) Oil and Gas Resources in the United States 
By U.S. Geological Survey Oil and Gas Assessment Team

Peer Review

American Association of Petroleum Geologists Committee on Resource Evaluation (CORE) Subcommittee to review the United States Onshore Continuous (Unconventional) Gas Assessment Methodology Used by the USGS

 

Reserve Growth Methodology

USGS Reports

New U.S. Geological Survey Method for the Assessment of Reserve Growth
By Reserve Growth Assessment Team

Reserve Growth of Oil and Gas Fields - Investigations and Applications
By Troy Cook

Peer Review

American Association of Petroleum Geologists Committee on Resource Evaluation (CORE) Subcommittee to review the Growth-to-Known Reserves

 

Below are a list of recent assessment areas.  You can also use the National Oil and Gas Assessment Map to browse these assessments.

Filter Total Items: 59
Province 5066 Cincinnati Arch, National Oil and Gas Assessments

Cincinnati Arch Oil and Gas Assessments

The U.S. Geological Survey completed the following assessments of undiscovered oil and gas resources of the Cincinnati Arch Province (5066) :
By
Geology, Energy, and Minerals Mission Area, Energy Resources Program, Central Energy Resources Science Center
Cincinnati Arch Oil and Gas Assessments

Cincinnati Arch Oil and Gas Assessments

The U.S. Geological Survey completed the following assessments of undiscovered oil and gas resources of the Cincinnati Arch Province (5066) :
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Province 5062 Arkoma Basin, National Oil and Gas Assessments

Arkoma Basin Oil and Gas Assessments

The U.S. Geological Survey completed the following assessments of undiscovered oil and gas resources of the Arkoma Basin Province 5062.
By
Geology, Energy, and Minerals Mission Area, Energy Resources Program, Central Energy Resources Science Center
Arkoma Basin Oil and Gas Assessments

Arkoma Basin Oil and Gas Assessments

The U.S. Geological Survey completed the following assessments of undiscovered oil and gas resources of the Arkoma Basin Province 5062.
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Province 5061 Southern Oklahoma Oil and Gas Assessments

Southern Oklahoma Oil and Gas Assessments

The U.S. Geological Survey completed the following assessments of undiscovered continuous oil and gas resources of the Southern Oklahoma Province (5061).
By
Geology, Energy, and Minerals Mission Area, Energy Resources Program, Central Energy Resources Science Center
Southern Oklahoma Oil and Gas Assessments

Southern Oklahoma Oil and Gas Assessments

The U.S. Geological Survey completed the following assessments of undiscovered continuous oil and gas resources of the Southern Oklahoma Province (5061).
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Province 5056 Forest City Basin Oil and Gas Assessment

Forest City Basin Oil and Gas Assessments

The U.S. Geological Survey completed the following assessments of undiscovered oil and gas potential of the Forest City Basin Province (5056).
By
Geology, Energy, and Minerals Mission Area, Energy Resources Program, Central Energy Resources Science Center
Forest City Basin Oil and Gas Assessments

Forest City Basin Oil and Gas Assessments

The U.S. Geological Survey completed the following assessments of undiscovered oil and gas potential of the Forest City Basin Province (5056).
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Province 5059 Sedgwick Basin, Oil and Gas Assessments

Sedgwick Basin Oil and Gas Assessments

Province Code: 5059 The Salina Basin Province (5059), covers an area of about 45,000 sq mi, consisting of the eastern half of Nebraska and the north-central portion of Kansas. The basin lies between the Cambridge Arch-Central Kansas Uplift Province (5053) on the west, the Nemaha Uplift Province (5055) to the east, the Sioux Arch Province (5032) to the north, and a poorly defined structural saddle...
By
Geology, Energy, and Minerals Mission Area, Energy Resources Program, Central Energy Resources Science Center
Sedgwick Basin Oil and Gas Assessments

Sedgwick Basin Oil and Gas Assessments

Province Code: 5059 The Salina Basin Province (5059), covers an area of about 45,000 sq mi, consisting of the eastern half of Nebraska and the north-central portion of Kansas. The basin lies between the Cambridge Arch-Central Kansas Uplift Province (5053) on the west, the Nemaha Uplift Province (5055) to the east, the Sioux Arch Province (5032) to the north, and a poorly defined structural saddle...
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Province 5057 Ozark Uplift Province, Oil and Gas Assessments

Ozark Uplift Oil and Gas Assessments

The U.S. Geological Survey completed the following assessments of undiscovered oil and gas potential of the Ozark Uplift Province (5057).
By
Geology, Energy, and Minerals Mission Area, Energy Resources Program, Central Energy Resources Science Center
Ozark Uplift Oil and Gas Assessments

Ozark Uplift Oil and Gas Assessments

The U.S. Geological Survey completed the following assessments of undiscovered oil and gas potential of the Ozark Uplift Province (5057).
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Nemaha Uplift Province 5055 National Oil and Gas Assessment

Nemaha Uplift Province Oil and Gas Assessment

The U.S. Geological Survey completed the following assessments of undiscovered oil and gas potential of the Nemaha Uplift Province (5055).
By
Geology, Energy, and Minerals Mission Area, Energy Resources Program, Central Energy Resources Science Center
Nemaha Uplift Province Oil and Gas Assessment

Nemaha Uplift Province Oil and Gas Assessment

The U.S. Geological Survey completed the following assessments of undiscovered oil and gas potential of the Nemaha Uplift Province (5055).
Learn More
Cambridge Arch-Central Kansas Uplift (5053) National Oil and Gas Assessment

Cambridge Arch-Central Kansas Uplift Oil and Gas Assessment

The U.S. Geological Survey completed the following assessments of undiscovered oil and gas potential of the Cambridge Arch/Central Kansas Uplift Province (5053).
By
Geology, Energy, and Minerals Mission Area, Energy Resources Program, Central Energy Resources Science Center
Cambridge Arch-Central Kansas Uplift Oil and Gas Assessment

Cambridge Arch-Central Kansas Uplift Oil and Gas Assessment

The U.S. Geological Survey completed the following assessments of undiscovered oil and gas potential of the Cambridge Arch/Central Kansas Uplift Province (5053).
Learn More
Province 5052 Iowa Shelf Basin - National Oil and Gas Assessment

Iowa Shelf Oil and Gas Assessments

The U.S. Geological Survey completed the following assessments of undiscovered oil and gas potential of the Iowa Shelf Province (5052).
By
Geology, Energy, and Minerals Mission Area, Energy Resources Program, Central Energy Resources Science Center
Iowa Shelf Oil and Gas Assessments

Iowa Shelf Oil and Gas Assessments

The U.S. Geological Survey completed the following assessments of undiscovered oil and gas potential of the Iowa Shelf Province (5052).
Learn More
Province 5046 Marathon Thrust Belt National Oil and Gas Assessments

Marathon Thrust Belt Oil and Gas Assessments

The U.S. Geological Survey completed the following assessments of undiscovered oil and gas resources of the Marathon Thrust Belt province 5046 in southwestern Texas.
By
Geology, Energy, and Minerals Mission Area, Energy Resources Program, Central Energy Resources Science Center
Marathon Thrust Belt Oil and Gas Assessments

Marathon Thrust Belt Oil and Gas Assessments

The U.S. Geological Survey completed the following assessments of undiscovered oil and gas resources of the Marathon Thrust Belt province 5046 in southwestern Texas.
Learn More
Superior 5051 Oil and Gas Assessment Basin

Superior Oil and Gas Assessments

The U.S. Geological Survey completed the following assessment of undiscovered oil and gas potential of the Superior Province 5051.
By
Geology, Energy, and Minerals Mission Area, Energy Resources Program, Central Energy Resources Science Center
Superior Oil and Gas Assessments

Superior Oil and Gas Assessments

The U.S. Geological Survey completed the following assessment of undiscovered oil and gas potential of the Superior Province 5051.
Learn More
Province 5043 Palo Duro Basin National Oil and Gas Assessments

Palo Duro Basin Oil and Gas Assessments

The U.S. Geological Survey completed the following assessments of undiscovered oil and gas resources of the Palo Duro Basin Province 5043 in Texas, New Mexico, and Oklahoma.
By
Geology, Energy, and Minerals Mission Area, Energy Resources Program, Central Energy Resources Science Center
Palo Duro Basin Oil and Gas Assessments

Palo Duro Basin Oil and Gas Assessments

The U.S. Geological Survey completed the following assessments of undiscovered oil and gas resources of the Palo Duro Basin Province 5043 in Texas, New Mexico, and Oklahoma.
Learn More

Below are datasets related to the National Oil and Gas Assessments.  

Legacy downloadable data
Filter Total Items: 55

USGS National and Global Oil and Gas Assessment Project- Gulf Coast Smackover Conventional Oil and Gas Assessment Unit Boundaries, Assessment Input Data, and Fact Sheet Data Tables USGS National and Global Oil and Gas Assessment Project- Gulf Coast Smackover Conventional Oil and Gas Assessment Unit Boundaries, Assessment Input Data, and Fact Sheet Data Tables

This data release contains the boundaries of assessment units and input data for the assessment of undiscovered conventional oil and gas resources in the Smackover formation in the U.S. Gulf Coast. 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...
By
Central Energy Resources Science Center

New Source Rock Data for the Niobrara and Sage Breaks intervals of the lower Cody Shale in the Wyoming part of the Bighorn Basin New Source Rock Data for the Niobrara and Sage Breaks intervals of the lower Cody Shale in the Wyoming part of the Bighorn Basin

In 2019 the U.S. Geological Survey (USGS) quantitively assessed the potential for undiscovered, technically recoverable continuous (unconventional) oil and gas resources in the Niobrara interval of the Cody Shale in the Bighorn Basin Province (Finn and others, 2019). Leading up to the assessment, in 2017, the USGS collected samples from the Niobrara and underlying Sage Breaks intervals...
By
Central Energy Resources Science Center

New Source Rock Data for the Lewis Shale from the eastern part of the Southwestern Wyoming Province, Wyoming and Colorado New Source Rock Data for the Lewis Shale from the eastern part of the Southwestern Wyoming Province, Wyoming and Colorado

In 2021 the United States Geological Survey (USGS) sampled the lower part of the Upper Cretaceous Lewis Shale in the eastern part of the Southwestern Wyoming Province to better characterize its petroleum source rock potential for an upcoming resource assessment. Ninety-five samples from 24 wells were collected from well cuttings of the lower part of the Lewis Shale stored at the U.S...
By
Central Energy Resources Science Center

USGS Gulf Coast Geologic Energy Assessments and Research Project-Upper Jurassic Smackover Formation Continuous Resources: Assessment Unit Boundaries, Assessment Input Data, and Fact Sheet Data Tables USGS Gulf Coast Geologic Energy Assessments and Research Project-Upper Jurassic Smackover Formation Continuous Resources: Assessment Unit Boundaries, Assessment Input Data, and Fact Sheet Data Tables

This data release contains the boundaries of assessment units and input data for the assessment of undiscovered continuous oil and gas resources in the Smackover formation in the U.S. Gulf Coast. 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...
By
Central Energy Resources Science Center

Compilation of total organic carbon and pyrolysis analysis data for Cretaceous marine shales in the Raton Basin-Sierra Grande Uplift Province, Colorado and New Mexico Compilation of total organic carbon and pyrolysis analysis data for Cretaceous marine shales in the Raton Basin-Sierra Grande Uplift Province, Colorado and New Mexico

This compilation presents total organic carbon and pyrolysis analysis data for the Pierre Shale, Niobrara Formation, and other Cretaceous marine shales in the Raton Basin-Sierra Grande Uplift Province. The data was used to characterize these potential source rock intervals in support of the oil and gas resource assessment in the province. The data was compiled from the publicly available...
By
Central Energy Resources Science Center

USGS National and Global Oil and Gas Assessment Project - Raton Basin-Sierra Grande Uplift Province: Assessment Unit Boundaries, Assessment Input Data, and Fact Sheet Data Tables USGS National and Global Oil and Gas Assessment Project - Raton Basin-Sierra Grande Uplift Province: Assessment Unit Boundaries, Assessment Input Data, and Fact Sheet Data Tables

This data release contains the boundaries of assessment units and input data for the assessment of coalbed gas resources in the Raton Basin-Sierra Grande Uplift Province, Colorado and New Mexico. 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...
By
Central Energy Resources Science Center

USGS National and Global Oil and Gas Assessment Project—Northwest Montana Bakken Formation: Assessment Unit Boundaries, Assessment Input Data, and Fact Sheet Data Tables USGS National and Global Oil and Gas Assessment Project—Northwest Montana Bakken Formation: Assessment Unit Boundaries, Assessment Input Data, and Fact Sheet Data Tables

This data release contains the boundaries of assessment units and input data for the assessment of undiscovered continuous oil and gas resources in the Bakken formation of Northwest Montana. 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...
By
Central Energy Resources Science Center

Data release for the 3D petroleum systems model of the Williston Basin, USA Data release for the 3D petroleum systems model of the Williston Basin, USA

This data release contains data associated with the journal article "Modeling the maturation history of the stacked petroleum systems of the Williston Basin, USA". Collectively, the data release includes 13 child items and metadata files that provide detailed descriptions of the attributes, processing steps, and original data sources. There is also a data table, "Williston_Basin_Data...
By
Central Energy Resources Science Center

New source rock data for the Mowry and Thermopolis Shales in the Wind River Basin, Wyoming New source rock data for the Mowry and Thermopolis Shales in the Wind River Basin, Wyoming

In 2020, the U.S. Geological Survey (USGS) assessed the potential for undiscovered, technically recoverable continuous (unconventional) oil and gas resources in the Mowry Shale in the Wind River Basin Province (Finn and others, 2021). To better characterize the source rock potential of the Mowry Shale and associated strata, 129 samples were collected from 45 wells from the well cuttings...
By
Central Energy Resources Science Center

Total organic carbon and pyrolysis analysis data for the Rock Well Petroleum core #8, southern Casper arch, Natrona County, Wyoming Total organic carbon and pyrolysis analysis data for the Rock Well Petroleum core #8, southern Casper arch, Natrona County, Wyoming

In 2006, Rock Well Petroleum drilled and logged nearly 1,600 feet (ft) of continuous core on the southern part of the Casper arch in Natrona County, Wyoming (see fig1.png). The core hole, named the Poison Spider core #8 penetrated the interval extending from the Upper Cretaceous Frontier Formation to the Triassic Alcova Limestone. The core was subsequently donated to the U.S. Geological...
By
Central Energy Resources Science Center

USGS National and Global Oil and Gas Assessment Project-U.S. Gulf Coast, Deep Tuscaloosa Conventional Gas: Assessment Unit Boundary, Assessment Input Data, and Fact Sheet Data Tables USGS National and Global Oil and Gas Assessment Project-U.S. Gulf Coast, Deep Tuscaloosa Conventional Gas: Assessment Unit Boundary, Assessment Input Data, and Fact Sheet Data Tables

This data release contains the boundaries of assessment units and input data for the assessment of undiscovered Deep Tuscaloosa Group sandstones conventional gas resources in the U.S. Gulf Coast in Louisiana and Mississippi. 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...
By
Energy Resources Program, Central Energy Resources Science Center, Geology, Energy & Minerals Science Center

Aggregated Oil and Natural Gas Drilling and Production History of the United States (ver. 1.1, April 2023) Aggregated Oil and Natural Gas Drilling and Production History of the United States (ver. 1.1, April 2023)

This data release provides several datasets that provide an overview of oil and gas well history and production of the United States, from 1817 to September 1, 2022. Well history data is aggregated into 1- and 10-mile squares indicating the total number of wells and counts of wells classified as oil, gas, dry, injection, hydraulically fractured, and/or horizontal wells. Well history is...
By
Central Energy Resources Science Center

Below are publications associated with this project.

Filter Total Items: 107

Assessment of coalbed gas resources in the Raton Basin-Sierra Grande Uplift Province, Colorado and New Mexico, 2022 Assessment of coalbed gas resources in the Raton Basin-Sierra Grande Uplift Province, Colorado and New Mexico, 2022

Using a geology-based assessment methodology, the U.S. Geological Survey estimated a mean of 5.2 trillion cubic feet of coalbed gas in the Vermejo Formation and Raton Formation of the Raton Basin-Sierra Grande Uplift Province.
Authors
Christopher Schenk, Thomas Finn, Tracey J. Mercier, Cheryl Woodall, Phuong A. Le, Andrea Cicero, Ronald M. Drake, Geoffrey Ellis, Michael Gardner, Sarah Gelman, Jane Hearon, Benjamin Johnson, Jenny Lagesse, Heidi M. Leathers-Miller, Kristen Marra, Kira Timm, Scott Young
By
Energy Resources Program, Central Energy Resources Science Center

Assessment of continuous oil and gas resources in the Bakken Formation of northwest Montana, 2022 Assessment of continuous oil and gas resources in the Bakken Formation of northwest Montana, 2022

Using a geology-based assessment methodology, the U.S. Geological Survey estimated means of 220 million barrels of continuous oil and 1 trillion cubic feet of continuous gas in the Bakken Formation of northwest Montana.
Authors
Christopher Schenk, Michael Gardner, Tracey J. Mercier, Cheryl Woodall, Phuong A. Le, Andrea Cicero, Ronald M. Drake, Geoffrey Ellis, Thomas Finn, Sarah Gelman, Jane Hearon, Benjamin Johnson, Jenny Lagesse, Heidi M. Leathers-Miller, Kristen Marra, Kira Timm, Scott Young
By
Energy Resources Program, Central Energy Resources Science Center

Assessment of undiscovered conventional gas resources in the Deep Tuscaloosa Group Sandstones of the Western Gulf Basin Province, U.S. Gulf Coast region, 2021 Assessment of undiscovered conventional gas resources in the Deep Tuscaloosa Group Sandstones of the Western Gulf Basin Province, U.S. Gulf Coast region, 2021

Using a geology-based assessment methodology, the U.S. Geological Survey estimated undiscovered, technically recoverable mean resources of 14,785 billion cubic feet of gas resources in the Western Gulf Basin Province, U.S. Gulf Coast region.
Authors
Matthew D. Merrill, Catherine Enomoto
By
Energy Resources Program, Central Energy Resources Science Center, Geology, Energy & Minerals Science Center

Assessment of undiscovered conventional oil and gas resources of the Montana Thrust Belt Province, 2021 Assessment of undiscovered conventional oil and gas resources of the Montana Thrust Belt Province, 2021

Using a geology-based assessment methodology, the U.S. Geological Survey estimated means of 783 million barrels of conventional oil and 17,606 billion (17.6 trillion) cubic feet of conventional gas in the Montana Thrust Belt Province.
Authors
Christopher Schenk, Tracey J. Mercier, Cheryl Woodall, Phuong A. Le, Andrea Cicero, Ronald M. Drake, Geoffrey Ellis, Thomas Finn, Michael Gardner, Sarah Gelman, Jane Hearon, Benjamin Johnson, Jenny Lagesse, Heidi M. Leathers-Miller, Kristen Marra, Kira Timm, Scott Young
By
Energy Resources Program, Central Energy Resources Science Center

Assessment of undiscovered continuous oil resources in the Bakken and Three Forks Formations of the Williston Basin Province, North Dakota and Montana, 2021 Assessment of undiscovered continuous oil resources in the Bakken and Three Forks Formations of the Williston Basin Province, North Dakota and Montana, 2021

Using a geology-based assessment methodology, the U.S. Geological Survey estimated undiscovered, technically recoverable mean resources of 4.3 billion barrels of oil and 4.9 trillion cubic feet of gas (associated) in the Bakken and Three Forks Formations of the Williston Basin Province, North Dakota and Montana.
Authors
Kristen Marra, Tracey J. Mercier, Sarah Gelman, Christopher Schenk, Cheryl Woodall, Andrea Cicero, Ronald M. Drake, Geoffrey Ellis, Thomas Finn, Michael Gardner, Jane Hearon, Benjamin Johnson, Jenny Lagesse, Phuong A. Le, Heidi M. Leathers-Miller, Kira Timm, Scott Young
By
Energy Resources Program, Central Energy Resources Science Center

Assessment of undiscovered gas resources in the Williston Basin Province, 2020 Assessment of undiscovered gas resources in the Williston Basin Province, 2020

Using a geology-based assessment methodology, the U.S. Geological Survey estimated a mean of 2,438 billion (2.4 trillion) cubic feet of gas resources in the Williston Basin Province, in North Dakota, Montana, and South Dakota.
Authors
Christopher Schenk, Tracey J. Mercier, Cheryl Woodall, Geoffrey Ellis, Thomas Finn, Phuong A. Le, Kristen Marra, Heidi Leathers-Miller, Ronald M. Drake
By
Energy Resources Program, Central Energy Resources Science Center

Assessment of undiscovered conventional oil and gas resources in the lower Paleozoic of the Williston Basin Province, 2020 Assessment of undiscovered conventional oil and gas resources in the lower Paleozoic of the Williston Basin Province, 2020

Using a geology-based assessment methodology, the U.S. Geological Survey estimated undiscovered, technically recoverable mean resources of 83 million barrels of oil and 351 billion cubic feet of gas in lower Paleozoic strata of the Williston Basin Province, North Dakota, Montana, and South Dakota.
Authors
Christopher Schenk, Tracey Mercier, Cheryl Woodall, Geoffrey Ellis, Thomas Finn, Phuong Le, Kristen Marra, Heidi Leathers-Miller, Ronald M. Drake
By
Energy Resources Program, Central Energy Resources Science Center

Assessment of undiscovered oil and gas resources in the Pennsylvanian Tyler Formation of the Williston Basin Province, 2020 Assessment of undiscovered oil and gas resources in the Pennsylvanian Tyler Formation of the Williston Basin Province, 2020

Using a geology-based assessment methodology, the U.S. Geological Survey estimated undiscovered, technically recoverable mean resources of 161 million barrels of oil and 93 billion cubic feet of gas in the Tyler Formation of the Williston Basin Province, North Dakota.
Authors
Christopher Schenk, Tracey Mercier, Cheryl Woodall, Thomas Finn, Phuong Le, Kristen Marra, Geoffrey Ellis, Heidi M. Leathers-Miller, Ronald M. Drake
By
Energy Resources Program, Central Energy Resources Science Center

Assessment of undiscovered conventional oil and gas resources of upper Paleozoic strata in the Williston Basin Province, 2020 Assessment of undiscovered conventional oil and gas resources of upper Paleozoic strata in the Williston Basin Province, 2020

Using a geology-based assessment methodology, the U.S. Geological Survey estimated undiscovered, technically recoverable mean oil and gas resources of 134 million barrels of oil and 81 billion cubic feet of gas in upper Paleozoic strata of the Williston Basin Province in North Dakota, Montana, and South Dakota.
Authors
Christopher Schenk, Tracey J. Mercier, Cheryl Woodall, Geoffrey Ellis, Thomas Finn, Phuong A. Le, Kristen Marra, Heidi Leathers-Miller, Ronald M. Drake
By
Energy Resources Program, Central Energy Resources Science Center

Assessment of undiscovered gas resources in Upper Devonian to Lower Cretaceous strata of the western North Slope, Alaska, 2021 Assessment of undiscovered gas resources in Upper Devonian to Lower Cretaceous strata of the western North Slope, Alaska, 2021

Using a geology-based assessment methodology, the U.S. Geological Survey estimated a mean of 1,407 billion (1.4 trillion) cubic feet of gas in conventional accumulations in Upper Devonian to Lower Cretaceous strata of the western North Slope, Alaska.
Authors
David Houseknecht, Tracey Mercier, Christopher Schenk, Thomas Moore, William Rouse, Julie Dumoulin, William Craddock, Richard Lease, Palma Botterell, Margaret Sanders, Rebecca Smith, Christopher Connors, Christopher Garrity, Katherine Whidden, Jared Gooley, John Counts, Joshua Long, Christina DeVera
By
Geology, Energy, and Minerals Mission Area, Ecosystems Mission Area, Energy Resources Program, Alaska Science Center, Central Energy Resources Science Center, Geology, Energy & Minerals Science Center

Assessment of continuous gas resources in the Horn River Basin, Cordova Embayment, and Liard Basin, Canada, 2019 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 Schenk, Tracey J. Mercier, Cheryl Woodall, Thomas Finn, Phuong A. Le, Michael Brownfield, Kristen Marra, Stephanie Gaswirth, Heidi Leathers-Miller, Janet K. Pitman
By
Energy Resources Program, Central Energy Resources Science Center

Assessment of continuous oil and gas resources in the Mowry Shale, Wind River Basin Province, Wyoming, 2020 Assessment of continuous oil and gas resources in the Mowry Shale, Wind River Basin Province, Wyoming, 2020

Using a geology-based assessment methodology, the U.S. Geological Survey estimated undiscovered, technically recoverable mean resources of 288 million barrels of oil and 2.6 trillion cubic feet of gas in the Mowry Shale in the Wind River Basin Province, Wyoming.
Authors
Thomas Finn, Christopher Schenk, Tracey J. Mercier, Cheryl Woodall, Marilyn Tennyson, Kristen Marra, Phuong A. Le, Heidi Leathers-Miller, Geoffrey Ellis
By
Energy Resources Program, Central Energy Resources Science Center

Below are datasets related to the National Oil and Gas Assessments.  

Below are news stories associated with this project.

Below are FAQ associated with this project.

Below are partners associated with this project.

Bureau of Land Management (BLM) Bureau of Land Management (BLM)

Bureau of Ocean Energy Management (BOEM) Bureau of Ocean Energy Management (BOEM)

U.S. Department of Energy (DOE) U.S. Department of Energy (DOE)

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