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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

click here to launch

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
link
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
Energy and Minerals Mission Area, Energy Resources Program, Central Energy Resources Science Center
link

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
link
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
Energy and Minerals Mission Area, Energy Resources Program, Central Energy Resources Science Center
link

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.
Learn More
link
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
Energy and Minerals Mission Area, Energy Resources Program, Central Energy Resources Science Center
link

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
link
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
Energy and Minerals Mission Area, Energy Resources Program, Central Energy Resources Science Center
link

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).
Learn More
link
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
Energy and Minerals Mission Area, Energy Resources Program, Central Energy Resources Science Center
link

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...
Learn More
link
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
Energy and Minerals Mission Area, Energy Resources Program, Central Energy Resources Science Center
link

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
link
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
Energy and Minerals Mission Area, Energy Resources Program, Central Energy Resources Science Center
link

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
link
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
Energy and Minerals Mission Area, Energy Resources Program, Central Energy Resources Science Center
link

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
link
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
Energy and Minerals Mission Area, Energy Resources Program, Central Energy Resources Science Center
link

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
link
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
Energy and Minerals Mission Area, Energy Resources Program, Central Energy Resources Science Center
link

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
link
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
Energy and Minerals Mission Area, Energy Resources Program, Central Energy Resources Science Center
link

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
link
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
Energy and Minerals Mission Area, Energy Resources Program, Central Energy Resources Science Center
link

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: 46

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 Survey Cor
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

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 defined wi
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)

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 also binned
By
Central Energy Resources Science Center

USGS National and Global Oil and Gas Assessment Project-Montana Thrust Belt 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 undiscovered gas resources in the Montana Thrust Belt province in 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 higher-level Total Petroleu
By
Central Energy Resources Science Center

USGS National and Global Oil and Gas Assessment Project - Resource Allocations for the BLM Carlsbad Planning Area

The U.S. Geological Survey Central Energy Science Center (CERSC) was asked to provide allocations of oil and gas resources and numbers of potential wells calculated from these allocated resources for the BLM Carlsbad Planning Area in New Mexico. The resource allocations were based on the most current USGS assessment of continuous (unconventional) oil and gas resources within eleven geologically de
By
Central Energy Resources Science Center

USGS National and Global Oil and Gas Assessment Project - Williston Basin, Bakken and Three Forks Formations Continuous Assessment Unit Boundaries and Assessment Input Data Forms

This data release contains the boundaries of assessment units and input data for the assessment of undiscovered oil and gas resources in the Bakken and Three Forks formations in the Williston Basin province in Montana, North Dakota and South Dakota. The Assessment Unit is the fundamental unit used in the National Assessment Project for the assessment of undiscovered oil and gas resources. The Asse
By
Central Energy Resources Science Center

Total organic carbon and pyrolysis analysis data for the U.S. Geological Survey Alcova AR-1-13 core hole, Natrona County, Wyoming

In 2013 the U.S. Geological Survey (USGS) drilled a continuous core in the southeastern part of the Wind River Basin, Wyoming to evaluate the source rock potential of the Lower and lowermost Upper Cretaceous marine shales . The well, named the Alcova Reservoir AR-1-13, located on the northeast flank of the Alcova anticline was spud in the lower part of the Frontier Formation and ended in the upper
By
Central Energy Resources Science Center

USGS National and Global Oil and Gas Assessment Project - Williston Basin, Lower Paleozoic Conventional Assessment Unit Boundaries and Assessment Input Data Forms

This data release contains the boundaries of assessment units and input data for the assessment of undiscovered oil and gas resources in the Lower Paleozoic of the Williston Basin province in Montana, North Dakota and South Dakota. 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 def
By
Central Energy Resources Science Center

USGS National and Global Oil and Gas Assessment Project - Williston Basin, Tyler Formation Assessment Unit Boundaries and Assessment Input Data Forms

This data release contains the boundaries of assessment units and input data for the assessment of undiscovered oil and gas resources in the Tyler formation of the Williston Basin province in Montana, North Dakota and South Dakota. 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 def
By
Central Energy Resources Science Center

USGS National and Global Oil and Gas Assessment Project - Williston Basin, Upper Paleozoic Conventional Assessment Unit Boundaries and Assessment Input Data Forms

This data release contains the boundaries of assessment units and input data for the assessment of undiscovered oil and gas resources in the Upper Paleozoic of the Williston Basin province in Montana, North Dakota and South Dakota. 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 def
By
Central Energy Resources Science Center

USGS National and Global Oil and Gas Assessment Project - Williston Basin, Gas Assessment Unit Boundaries and Assessment Input Data Forms

This data release contains the boundaries of assessment units and input data for the assessment of undiscovered gas resources in the Williston Basin province in Montana, North Dakota and South Dakota. 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

USGS National and Global Oil and Gas Assessment Project - Northern Alaska Province, Western North Slope Assessment Unit Boundaries and Assessment Input Data Forms

This data release contains the boundaries of assessment units and input data for the assessment of undiscovered oil and gas resources of strata older than the Torok Formation of the Western North Slope in the Northern Alaska province. 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, Geology, Energy & Minerals Science Center

Below are publications associated with this project.

Filter Total Items: 98

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 W. Houseknecht, Tracey J. Mercier, Christopher J. Schenk, Thomas E. Moore, William A. Rouse, Julie A. Dumoulin, William H. Craddock, Richard O. Lease, Palma J. Botterell, Margaret M. Sanders, Rebecca A. Smith, Christopher D. Connors, Christopher P. Garrity, Katherine J. Whidden, Jared T. Gooley, John W. Counts, Joshua H. Long, Christina A. DeVera
By
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

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
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

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 M. Finn, Christopher J. Schenk, Tracey J. Mercier, Cheryl A. Woodall, Marilyn E. Tennyson, Kristen R. Marra, Phuong A. Le, Heidi M. Leathers-Miller, Geoffrey S. Ellis
By
Energy Resources Program, Central Energy Resources Science Center

Geologic assessment of undiscovered oil and gas resources in the Cherokee Platform area of Kansas, Oklahoma, and Missouri

In 2015, the U.S. Geological Survey completed a geology-based assessment to estimate the volumes of undiscovered, technically recoverable petroleum resources in the Cherokee Platform Province area of southeastern Kansas, northeastern Oklahoma, and southwestern Missouri. The U.S. Geological Survey identified four stratigraphic intervals that contain petroleum source rocks: (1) thin shales in the Mi
Authors
Ronald M. Drake, Joseph R. Hatch
By
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
By
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
By
Energy Resources Program, Central Energy Resources Science Center

Assessment of undiscovered oil and gas resources in the Mancos-Menefee composite and underlying Todilto Total Petroleum Systems of the San Juan Basin Province, New Mexico and Colorado, 2020

Using a geology-based assessment methodology, the U.S. Geological Survey estimated undiscovered, technically recoverable mean resources of 12 million barrels of oil and 27 trillion cubic feet of gas in the Mancos-Menefee Composite and underlying Todilto Total Petroleum Systems of the San Juan Basin Province, New Mexico and Colorado.
Authors
Kristen R. Marra, Christopher J. Schenk, Tracey J. Mercier, Heidi M. Leathers-Miller, Marilyn E. Tennyson, Thomas M. Finn, Cheryl A. Woodall, Michael E. Brownfield, Phuong A. Le, Ronald M. Drake
By
Energy Resources Program, Central Energy Resources Science Center

Assessment of undiscovered gas resources in the Lewis Shale Total Petroleum System of the San Juan Basin Province, New Mexico and Colorado, 2020

Using a geology-based assessment methodology, the U.S. Geological Survey estimated undiscovered, technically recoverable mean resources of 2.6 trillion cubic feet of gas in the Lewis Shale Total Petroleum System of the San Juan Basin Province, New Mexico and Colorado.
Authors
Kristen R. Marra, Christopher J. Schenk, Tracey J. Mercier, Heidi M. Leathers-Miller, Marilyn E. Tennyson, Thomas M. Finn, Cheryl A. Woodall, Michael E. Brownfield, Phuong A. Le, Ronald M. Drake
By
Energy Resources Program, Central Energy Resources Science Center

Assessment of undiscovered gas resources of the Fruitland Total Petroleum System, San Juan Basin Province, New Mexico and Colorado, 2020

Using a geology-based assessment methodology, the U.S. Geological Survey estimated undiscovered, technically recoverable mean resources of 39 trillion cubic feet of gas within continuous and conventional reservoirs of the Fruitland Total Petroleum System in the San Juan Basin Province, New Mexico and Colorado.
Authors
Kristen R. Marra, Christopher J. Schenk, Tracey J. Mercier, Heidi M. Leathers-Miller, Marilyn E. Tennyson, Thomas M. Finn, Cheryl A. Woodall, Michael E. Brownfield, Phuong A. Le, Ronald M. Drake
By
Energy Resources Program, Central Energy Resources Science Center

Assessment of undiscovered gas resources of the Sacramento Basin Province in California, 2019

Using a geology-based assessment methodology, the U.S. Geological Survey estimated undiscovered, technically recoverable mean resources of 512 billion cubic feet of gas in the Upper Jurassic–Neogene Total Petroleum System of the Sacramento Basin Province in California.
Authors
Christopher J. Schenk, Tracey J. Mercier, Marilyn E. Tennyson, Cheryl A. Woodall, Kristen R. Marra, Heidi M. Leathers-Miller, Phuong A. Le
By
Energy Resources Program, Central Energy Resources Science Center

Steps taken for calculating estimated ultimate recoveries of wells in the Eagle Ford Group and associated Cenomanian–Turonian strata, U.S. Gulf Coast, Texas, 2018

In 2018, the U.S. Geological Survey published an assessment of technically recoverable continuous oil and gas resources of the Eagle Ford Group and associated Cenomanian–Turonian strata in the U.S. Gulf Coast of Texas. Estimated ultimate recoveries (EURs) were calculated with production data from IHS MarkitTM using DeclinePlus software in the Harmony interface. These EURs were a major component of
Authors
Heidi M. Leathers-Miller
By
Energy Resources Program, Central Energy Resources Science Center

Assessment of continuous oil and gas resources in the Ordovician Collingwood Formation and Utica Shale of the Michigan Basin Province, 2019

Using a geology-based assessment methodology, the U.S. Geological Survey estimated undiscovered, technically recoverable mean resources of 290 milllion barrels of shale oil and 7.9 trillion cubic feet of shale gas in the Ordovician Collingwood-Utica Shale Total Petroleum System of the Michigan Basin Province.
Authors
Christopher J. Schenk, Tracey J. Mercier, Cheryl A. Woodall, Heidi M. Leathers-Miller, Thomas M. Finn, Phuong A. Le, Michael E. Brownfield, Kristen R. Marra, Geoffrey S. 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 Ocean Energy Management (BOEM)

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
link
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
Energy and Minerals Mission Area, Energy Resources Program, Central Energy Resources Science Center
link

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
link
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
Energy and Minerals Mission Area, Energy Resources Program, Central Energy Resources Science Center
link

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.
Learn More
link
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).
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Energy and Minerals Mission Area, Energy Resources Program, Central Energy Resources Science Center
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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).
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Energy and Minerals Mission Area, Energy Resources Program, Central Energy Resources Science Center
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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...
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Energy and Minerals Mission Area, Energy Resources Program, Central Energy Resources Science Center
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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).
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Energy and Minerals Mission Area, Energy Resources Program, Central Energy Resources Science Center
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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).
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Energy and Minerals Mission Area, Energy Resources Program, Central Energy Resources Science Center
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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).
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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).
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Energy and Minerals Mission Area, Energy Resources Program, Central Energy Resources Science Center
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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).
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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).
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Energy and Minerals Mission Area, Energy Resources Program, Central Energy Resources Science Center
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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).
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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.
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Energy and Minerals Mission Area, Energy Resources Program, Central Energy Resources Science Center
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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.
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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.
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Energy and Minerals Mission Area, Energy Resources Program, Central Energy Resources Science Center
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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.
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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.
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Energy and Minerals Mission Area, Energy Resources Program, Central Energy Resources Science Center
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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.
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Below are datasets related to the National Oil and Gas Assessments.  

Legacy downloadable data
Filter Total Items: 46

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 Survey Cor
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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

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 defined wi
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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)

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 also binned
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Central Energy Resources Science Center

USGS National and Global Oil and Gas Assessment Project-Montana Thrust Belt 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 undiscovered gas resources in the Montana Thrust Belt province in 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 higher-level Total Petroleu
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Central Energy Resources Science Center

USGS National and Global Oil and Gas Assessment Project - Resource Allocations for the BLM Carlsbad Planning Area

The U.S. Geological Survey Central Energy Science Center (CERSC) was asked to provide allocations of oil and gas resources and numbers of potential wells calculated from these allocated resources for the BLM Carlsbad Planning Area in New Mexico. The resource allocations were based on the most current USGS assessment of continuous (unconventional) oil and gas resources within eleven geologically de
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Central Energy Resources Science Center

USGS National and Global Oil and Gas Assessment Project - Williston Basin, Bakken and Three Forks Formations Continuous Assessment Unit Boundaries and Assessment Input Data Forms

This data release contains the boundaries of assessment units and input data for the assessment of undiscovered oil and gas resources in the Bakken and Three Forks formations in the Williston Basin province in Montana, North Dakota and South Dakota. The Assessment Unit is the fundamental unit used in the National Assessment Project for the assessment of undiscovered oil and gas resources. The Asse
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Central Energy Resources Science Center

Total organic carbon and pyrolysis analysis data for the U.S. Geological Survey Alcova AR-1-13 core hole, Natrona County, Wyoming

In 2013 the U.S. Geological Survey (USGS) drilled a continuous core in the southeastern part of the Wind River Basin, Wyoming to evaluate the source rock potential of the Lower and lowermost Upper Cretaceous marine shales . The well, named the Alcova Reservoir AR-1-13, located on the northeast flank of the Alcova anticline was spud in the lower part of the Frontier Formation and ended in the upper
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Central Energy Resources Science Center

USGS National and Global Oil and Gas Assessment Project - Williston Basin, Lower Paleozoic Conventional Assessment Unit Boundaries and Assessment Input Data Forms

This data release contains the boundaries of assessment units and input data for the assessment of undiscovered oil and gas resources in the Lower Paleozoic of the Williston Basin province in Montana, North Dakota and South Dakota. 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 def
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Central Energy Resources Science Center

USGS National and Global Oil and Gas Assessment Project - Williston Basin, Tyler Formation Assessment Unit Boundaries and Assessment Input Data Forms

This data release contains the boundaries of assessment units and input data for the assessment of undiscovered oil and gas resources in the Tyler formation of the Williston Basin province in Montana, North Dakota and South Dakota. 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 def
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Central Energy Resources Science Center

USGS National and Global Oil and Gas Assessment Project - Williston Basin, Upper Paleozoic Conventional Assessment Unit Boundaries and Assessment Input Data Forms

This data release contains the boundaries of assessment units and input data for the assessment of undiscovered oil and gas resources in the Upper Paleozoic of the Williston Basin province in Montana, North Dakota and South Dakota. 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 def
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Central Energy Resources Science Center

USGS National and Global Oil and Gas Assessment Project - Williston Basin, Gas Assessment Unit Boundaries and Assessment Input Data Forms

This data release contains the boundaries of assessment units and input data for the assessment of undiscovered gas resources in the Williston Basin province in Montana, North Dakota and South Dakota. 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
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Central Energy Resources Science Center

USGS National and Global Oil and Gas Assessment Project - Northern Alaska Province, Western North Slope Assessment Unit Boundaries and Assessment Input Data Forms

This data release contains the boundaries of assessment units and input data for the assessment of undiscovered oil and gas resources of strata older than the Torok Formation of the Western North Slope in the Northern Alaska province. 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, Geology, Energy & Minerals Science Center

Below are publications associated with this project.

Filter Total Items: 98

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 W. Houseknecht, Tracey J. Mercier, Christopher J. Schenk, Thomas E. Moore, William A. Rouse, Julie A. Dumoulin, William H. Craddock, Richard O. Lease, Palma J. Botterell, Margaret M. Sanders, Rebecca A. Smith, Christopher D. Connors, Christopher P. Garrity, Katherine J. Whidden, Jared T. Gooley, John W. Counts, Joshua H. Long, Christina A. DeVera
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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

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
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

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 M. Finn, Christopher J. Schenk, Tracey J. Mercier, Cheryl A. Woodall, Marilyn E. Tennyson, Kristen R. Marra, Phuong A. Le, Heidi M. Leathers-Miller, Geoffrey S. Ellis
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Energy Resources Program, Central Energy Resources Science Center

Geologic assessment of undiscovered oil and gas resources in the Cherokee Platform area of Kansas, Oklahoma, and Missouri

In 2015, the U.S. Geological Survey completed a geology-based assessment to estimate the volumes of undiscovered, technically recoverable petroleum resources in the Cherokee Platform Province area of southeastern Kansas, northeastern Oklahoma, and southwestern Missouri. The U.S. Geological Survey identified four stratigraphic intervals that contain petroleum source rocks: (1) thin shales in the Mi
Authors
Ronald M. Drake, Joseph R. Hatch
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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
By
Energy Resources Program, Central Energy Resources Science Center

Assessment of undiscovered oil and gas resources in the Mancos-Menefee composite and underlying Todilto Total Petroleum Systems of the San Juan Basin Province, New Mexico and Colorado, 2020

Using a geology-based assessment methodology, the U.S. Geological Survey estimated undiscovered, technically recoverable mean resources of 12 million barrels of oil and 27 trillion cubic feet of gas in the Mancos-Menefee Composite and underlying Todilto Total Petroleum Systems of the San Juan Basin Province, New Mexico and Colorado.
Authors
Kristen R. Marra, Christopher J. Schenk, Tracey J. Mercier, Heidi M. Leathers-Miller, Marilyn E. Tennyson, Thomas M. Finn, Cheryl A. Woodall, Michael E. Brownfield, Phuong A. Le, Ronald M. Drake
By
Energy Resources Program, Central Energy Resources Science Center

Assessment of undiscovered gas resources in the Lewis Shale Total Petroleum System of the San Juan Basin Province, New Mexico and Colorado, 2020

Using a geology-based assessment methodology, the U.S. Geological Survey estimated undiscovered, technically recoverable mean resources of 2.6 trillion cubic feet of gas in the Lewis Shale Total Petroleum System of the San Juan Basin Province, New Mexico and Colorado.
Authors
Kristen R. Marra, Christopher J. Schenk, Tracey J. Mercier, Heidi M. Leathers-Miller, Marilyn E. Tennyson, Thomas M. Finn, Cheryl A. Woodall, Michael E. Brownfield, Phuong A. Le, Ronald M. Drake
By
Energy Resources Program, Central Energy Resources Science Center

Assessment of undiscovered gas resources of the Fruitland Total Petroleum System, San Juan Basin Province, New Mexico and Colorado, 2020

Using a geology-based assessment methodology, the U.S. Geological Survey estimated undiscovered, technically recoverable mean resources of 39 trillion cubic feet of gas within continuous and conventional reservoirs of the Fruitland Total Petroleum System in the San Juan Basin Province, New Mexico and Colorado.
Authors
Kristen R. Marra, Christopher J. Schenk, Tracey J. Mercier, Heidi M. Leathers-Miller, Marilyn E. Tennyson, Thomas M. Finn, Cheryl A. Woodall, Michael E. Brownfield, Phuong A. Le, Ronald M. Drake
By
Energy Resources Program, Central Energy Resources Science Center

Assessment of undiscovered gas resources of the Sacramento Basin Province in California, 2019

Using a geology-based assessment methodology, the U.S. Geological Survey estimated undiscovered, technically recoverable mean resources of 512 billion cubic feet of gas in the Upper Jurassic–Neogene Total Petroleum System of the Sacramento Basin Province in California.
Authors
Christopher J. Schenk, Tracey J. Mercier, Marilyn E. Tennyson, Cheryl A. Woodall, Kristen R. Marra, Heidi M. Leathers-Miller, Phuong A. Le
By
Energy Resources Program, Central Energy Resources Science Center

Steps taken for calculating estimated ultimate recoveries of wells in the Eagle Ford Group and associated Cenomanian–Turonian strata, U.S. Gulf Coast, Texas, 2018

In 2018, the U.S. Geological Survey published an assessment of technically recoverable continuous oil and gas resources of the Eagle Ford Group and associated Cenomanian–Turonian strata in the U.S. Gulf Coast of Texas. Estimated ultimate recoveries (EURs) were calculated with production data from IHS MarkitTM using DeclinePlus software in the Harmony interface. These EURs were a major component of
Authors
Heidi M. Leathers-Miller
By
Energy Resources Program, Central Energy Resources Science Center

Assessment of continuous oil and gas resources in the Ordovician Collingwood Formation and Utica Shale of the Michigan Basin Province, 2019

Using a geology-based assessment methodology, the U.S. Geological Survey estimated undiscovered, technically recoverable mean resources of 290 milllion barrels of shale oil and 7.9 trillion cubic feet of shale gas in the Ordovician Collingwood-Utica Shale Total Petroleum System of the Michigan Basin Province.
Authors
Christopher J. Schenk, Tracey J. Mercier, Cheryl A. Woodall, Heidi M. Leathers-Miller, Thomas M. Finn, Phuong A. Le, Michael E. Brownfield, Kristen R. Marra, Geoffrey S. 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 Ocean Energy Management (BOEM)

U.S. Department of Energy (DOE)

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