United States Assessments of Undiscovered Oil and Gas Resources Active
Explore US Undiscovered Oil and Gas Assessment Provinces
Assessment results, publications, data and more are available
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
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.
Recent Assessments
Below are the latest US 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
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
Below are a list of recent assessment areas. You can also use the National Oil and Gas Assessment Map to browse these assessments.
Bend Arch-Fort Worth Basin Oil and Gas Assessments
Denver Basin Oil and Gas Assessments
Raton Basin-Sierra Grande Uplift Oil and Gas Assessments
Southwestern Wyoming Oil and Gas Assessments
Wyoming Thrust Belt Oil and Gas Assessments
Wind River Basin Oil and Gas Assessments
Bighorn Basin Oil and Gas Assessments
Montana Thrust Belt Oil and Gas Assessments
North-Central Montana Oil and Gas Assessments
Hanna, Laramie, Shirley Basins Oil and Gas Assessments
San Juan Basin Oil and Gas Assessments
Paradox Basin Oil and Gas Assessments
Below are datasets related to the National Oil and Gas Assessments.
USGS Gulf Coast Petroleum Systems, and National and Global Oil and Gas Assessment Projects - USGS Province 50 Assessment Unit Boundaries and Assessment Input Forms
The Assessment Unit is the fundamental unit used in the National Assessment Project for the assessment of undiscovered oil and gas resources. The Assessment Unit is defined within the context of the higher-level Total Petroleum System. The Assessment Unit is shown herein as a geographic boundary interpreted, defined, and mapped by the geologist responsible for the province and incorporates a set o
USGS National and Global Oil and Gas Assessment Project-Appalachian Basin Province, Upper Devonian Shales Assessment Unit Boundaries and Assessment Input Forms
USGS National and Global Oil and Gas Assessment Project - Sunbury and Chattanooga Shales Assessment Unit Boundaries and Assessment Input Forms
USGS National and Global Oil and Gas Assessment Project-Permian Basin Province, Midland Basin, Spraberry Formation Assessment Units
USGS Alaska Petroleum Systems Project: Northern Alaska Province, Nanushuk and Torok Formations Assessment Units and Assessment Input Forms
USGS National and Global Oil and Gas Assessment Project-Gulf Coast Mesozoic Province, Bossier Formation Assessment Units
USGS National and Global Oil and Gas Assessment Project-Permian Basin Province, Val Verde Basin, Canyon Sandstones Assessment Units
USGS National and Global Oil and Gas Assessment Project-Permian Basin Province, Midland Basin, Wolfcamp Shale Assessment Units
Below are publications associated with this project.
Assessment of undiscovered oil and gas resources in the Eagle Ford Group and associated Cenomanian–Turonian Strata, U.S. Gulf Coast, Texas, 2018
Multiple stacked plays to drive continued Permian development
Assessment of undiscovered conventional oil and gas resources in the downdip Paleogene formations, U.S. Gulf Coast, 2017
Assessment of undiscovered oil and gas resources of the Susitna Basin, southern Alaska, 2017
Assessment of undiscovered continuous gas resources in Upper Devonian Shales of the Appalachian Basin Province, 2017
Assessment of continuous gas resources in the Phosphoria Formation of the Wyoming Thrust Belt Province, Wyoming, Idaho, and Utah, 2017
Assessment of undiscovered conventional oil and gas resources in the Wyoming Thrust Belt Province, Wyoming, Idaho, and Utah, 2017
Assessment of undiscovered oil and gas resources in the North-Central Montana Province, 2017
Assessment of undiscovered oil and gas resources in the Cretaceous Nanushuk and Torok Formations, Alaska North Slope, and summary of resource potential of the National Petroleum Reserve in Alaska, 2017
Procedure for calculating estimated ultimate recoveries of wells in the Mississippian Barnett Shale, Bend Arch–Fort Worth Basin Province of north-central Texas
U.S. Geological Survey input-data forms for the assessment of the Spraberry Formation of the Midland Basin, Permian Basin Province, Texas, 2017
Assessment of undiscovered oil and gas resources in the Ventura Basin Province, California, 2016
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.
- Overview
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 OverviewThe 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.
Recent AssessmentsBelow are the latest US 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. KlettU.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. CharpentierA Monte Carlo Simulation Method for the Assessment of Undiscovered, Conventional Oil and Gas
By Ronald R. Charpentier and T.R. KlettContinuous Resources
USGS Reports
U.S. Geological Survey Assessment Concepts for Continuous Petroleum Accumulations
By James W. SchmokerU.S. Geological Survey Input-Data Form and Operational Procedure for the Assessment Of Continuous Petroleum Accumulations, 2002
By T.R. Klett and James W. SchmokerAnalytic Resource Assessment Method for Continuous Petroleum Accumulations—The ACCESS Assessment Method
By Robert A. CrovelliFORSPAN 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 CookAssembling 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 CookNew 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 TeamPeer Review
Reserve Growth Methodology
USGS Reports
New U.S. Geological Survey Method for the Assessment of Reserve Growth
By Reserve Growth Assessment TeamReserve Growth of Oil and Gas Fields - Investigations and Applications
By Troy CookPeer Review
- Science
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: 59Bend Arch-Fort Worth Basin Oil and Gas Assessments
The U.S. Geological Survey completed the following assessments of undiscovered oil and gas potential of the Bend Arch-Fort Worth Basin Province 5045, north-central Texas and southwestern Oklahoma.Denver Basin Oil and Gas Assessments
The U.S. Geological Survey completed the following assessments of undiscovered oil and gas resources of the Denver Basin Province 5039 in Colorado, Kansas, Nebraska, South Dakota, and Wyoming.Raton Basin-Sierra Grande Uplift Oil and Gas Assessments
The U.S. Geological Survey completed the following assessments of undiscovered oil and gas potential of the Raton Basin–Sierra Grande Uplift Province 5041 of northeastern New Mexico and southeastern Colorado.Southwestern Wyoming Oil and Gas Assessments
The U.S. Geological Survey completed the following assessments of undiscovered oil and gas potentional of the Southwestern Wyoming Province 5037 of southwestern Wyoming, northwestern Colorado, and northeastern Utah.Wyoming Thrust Belt Oil and Gas Assessments
The U.S. Geological Survey completed the following assessments of undiscovered oil and gas resources of the Wyoming Thrust Belt Province 5036 in Wyoming, Idaho, and Utah.Wind River Basin Oil and Gas Assessments
The U.S. Geological Survey completed the following assessments of undiscovered oil and gas potential of the Wind River Basin Province 5035 in central Wyoming.Bighorn Basin Oil and Gas Assessments
The U.S. Geological Survey completed the following assessments of undiscovered oil and gas potential of the Bighorn Basin Province 5034.Montana Thrust Belt Oil and Gas Assessments
The U.S. Geological Survey completed the following assessments of undiscovered oil and gas resources of the Montana Thrust Belt Province 5027 of northwestern Montana.North-Central Montana Oil and Gas Assessments
The U.S. Geological Survey completed the following assessments of undiscovered oil and gas resources of the North-Central Montana and Williston Basin Provinces 5028 of central Montana and western North Dakota.Hanna, Laramie, Shirley Basins Oil and Gas Assessments
The U.S. Geological Survey completed the following assessments of undiscovered oil and gas resource potential of the Hanna, Laramie, and Shirley Basins Province 5030 in Wyoming and northeastern Colorado.San Juan Basin Oil and Gas Assessments
The U.S. Geological Survey completed the following assessments of undiscovered oil and gas resources of the San Juan Basin Province of northwestern New Mexico and southwestern Colorado 5022.Paradox Basin Oil and Gas Assessments
The U.S. Geological Survey completed the following assessments of undiscovered oil and gas resources of the Paradox Basin Province of Utah, Colorado, New Mexico and Arizona 5021. - Data
Below are datasets related to the National Oil and Gas Assessments.
Filter Total Items: 44USGS Gulf Coast Petroleum Systems, and National and Global Oil and Gas Assessment Projects - USGS Province 50 Assessment Unit Boundaries and Assessment Input Forms
The Assessment Unit is the fundamental unit used in the National Assessment Project for the assessment of undiscovered oil and gas resources. The Assessment Unit is defined within the context of the higher-level Total Petroleum System. The Assessment Unit is shown herein as a geographic boundary interpreted, defined, and mapped by the geologist responsible for the province and incorporates a set o
USGS National and Global Oil and Gas Assessment Project-Appalachian Basin Province, Upper Devonian Shales Assessment Unit Boundaries and Assessment Input Forms
The Assessment Unit is the fundamental unit used in the National Assessment Project for the assessment of undiscovered oil and gas resources. The Assessment Unit is defined within the context of the higher-level Total Petroleum System. The Assessment Unit is shown herein as a geographic boundary interpreted, defined, and mapped by the geologist responsible for the province and incorporates a set oUSGS National and Global Oil and Gas Assessment Project - Sunbury and Chattanooga Shales Assessment Unit Boundaries and Assessment Input Forms
The Assessment Unit is the fundamental unit used in the National Assessment Project for the assessment of undiscovered oil and gas resources. The Assessment Unit is defined within the context of the higher-level Total Petroleum System. The Assessment Unit is shown herein as a geographic boundary interpreted, defined, and mapped by the geologist responsible for the province and incorporates a set oUSGS National and Global Oil and Gas Assessment Project-Permian Basin Province, Midland Basin, Spraberry Formation Assessment Units
The Assessment Unit is the fundamental unit used in the National Assessment Project for the assessment of undiscovered oil and gas resources. The Assessment Unit is defined within the context of the higher-level Total Petroleum System. The Assessment Unit is shown herein as a geographic boundary interpreted, defined, and mapped by the geologist responsible for the province and incorporates a set oUSGS Alaska Petroleum Systems Project: Northern Alaska Province, Nanushuk and Torok Formations Assessment Units and Assessment Input Forms
The Assessment Unit is the fundamental unit used in the National Assessment Project for the assessment of undiscovered oil and gas resources. The Assessment Unit is defined within the context of the higher-level Total Petroleum System. The Assessment Unit is shown herein as a geographic boundary interpreted, defined, and mapped by the geologist responsible for the province and incorporates a set oUSGS National and Global Oil and Gas Assessment Project-Gulf Coast Mesozoic Province, Bossier Formation Assessment Units
The Assessment Unit is the fundamental unit used in the National Assessment Project for the assessment of undiscovered oil and gas resources. The Assessment Unit is defined within the context of the higher-level Total Petroleum System. The Assessment Unit is shown herein as a geographic boundary interpreted, defined, and mapped by the geologist responsible for the province and incorporates a set oUSGS National and Global Oil and Gas Assessment Project-Permian Basin Province, Val Verde Basin, Canyon Sandstones Assessment Units
The Assessment Unit is the fundamental unit used in the National Assessment Project for the assessment of undiscovered oil and gas resources. The Assessment Unit is defined within the context of the higher-level Total Petroleum System. The Assessment Unit is shown herein as a geographic boundary interpreted, defined, and mapped by the geologist responsible for the province and incorporates a set oUSGS National and Global Oil and Gas Assessment Project-Permian Basin Province, Midland Basin, Wolfcamp Shale Assessment Units
The Assessment Unit is the fundamental unit used in the National Assessment Project for the assessment of undiscovered oil and gas resources. The Assessment Unit is defined within the context of the higher-level Total Petroleum System. The Assessment Unit is shown herein as a geographic boundary interpreted, defined, and mapped by the geologist responsible for the province and incorporates a set o - Publications
Below are publications associated with this project.
Filter Total Items: 97Assessment of undiscovered oil and gas resources in the Eagle Ford Group and associated Cenomanian–Turonian Strata, U.S. Gulf Coast, Texas, 2018
Using a geology-based assessment methodology, the U.S. Geological Survey estimated undiscovered, technically recoverable mean resources of 8.5 billion barrels of oil and 66 trillion cubic feet of gas in continuous accumulations in the Upper Cretaceous Eagle Ford Group and associated Cenomanian–Turonian strata in onshore lands of the U.S. Gulf Coast region, Texas.AuthorsKatherine J. Whidden, Janet K. Pitman, Ofori N. Pearson, Stanley T. Paxton, Scott A. Kinney, Nicholas J. Gianoutsos, Christopher J. Schenk, Heidi M. Leathers-Miller, Justin E. Birdwell, Michael E. Brownfield, Lauri A. Burke, Russell F. Dubiel, Katherine L. French, Stephanie B. Gaswirth, Seth S. Haines, Phuong A. Le, Kristen R. Marra, Tracey J. Mercier, Marilyn E. Tennyson, Cheryl A. WoodallMultiple stacked plays to drive continued Permian development
The exploitation of unconventional (continuous) resource plays with horizontal drilling and fracturing techniques continues to spur renewed development in mature producing basins in the US. The Permian basin of west Texas has emerged as a particularly strong prospect due to the potential for multiple stacked resource plays in formations such as the Wolfcamp shale and Spraberry and Bone Spring formAuthorsKristen R. Marra, Stephanie B. GaswirthAssessment of undiscovered conventional oil and gas resources in the downdip Paleogene formations, U.S. Gulf Coast, 2017
Using a geology-based assessment methodology, the U.S. Geological Survey estimated mean undiscovered, technically recoverable conventional resources of 100 million barrels of oil and 16.5 trillion cubic feet of gas in the downdip Paleogene formations in onshore lands and State waters of the U.S. Gulf Coast region.AuthorsMarc L. Buursink, Colin A. Doolan, Catherine B. Enomoto, William H. Craddock, James L. Coleman, Michael E. Brownfield, Stephanie B. Gaswirth, Timothy R. Klett, Phuong A. Le, Heidi M. Leathers-Miller, Kristen R. Marra, Tracey J. Mercier, Ofori N. Pearson, Janet K. Pitman, Christopher J. Schenk, Marilyn E. Tennyson, Katherine J. Whidden, Cheryl A. WoodallAssessment of undiscovered oil and gas resources of the Susitna Basin, southern Alaska, 2017
The U.S. Geological Survey (USGS) recently completed an assessment of undiscovered, technically recoverable oil and gas resources in the Susitna Basin of southern Alaska. Using a geology-based methodology, the USGS estimates that mean undiscovered volumes of about 2 million barrels of oil and nearly 1.7 trillion cubic feet of gas may be found in this area.AuthorsRichard G. Stanley, Christopher J. Potter, Kristen A. Lewis, Paul G. Lillis, Anjana K. Shah, Peter J. Haeussler, Jeffrey D. Phillips, Zenon C. Valin, Christopher J. Schenk, Timothy R. Klett, Michael E. Brownfield, Ronald M. Drake, Thomas M. Finn, Seth S. Haines, Debra K. Higley, David W. Houseknecht, Phuong A. Le, Kristen R. Marra, Tracey J. Mercier, Heidi M. Leathers-Miller, Stanley T. Paxton, Ofori N. Pearson, Marilyn E. Tennyson, Cheryl A. Woodall, Margarita V. ZyrianovaAssessment of undiscovered continuous gas resources in Upper Devonian Shales of the Appalachian Basin Province, 2017
Using a geology-based assessment methodology, the U.S. Geological Survey estimated mean undiscovered, technically recoverable continuous resources of 10.7 trillion cubic feet of natural gas in Upper Devonian shales of the Appalachian Basin Province.AuthorsCatherine B. Enomoto, Michael H. Trippi, Debra K. Higley, William A. Rouse, Frank T. Dulong, Timothy R. Klett, Tracey J. Mercier, Michael E. Brownfield, Heidi M. Leathers-Miller, Thomas M. Finn, Kristen R. Marra, Phuong A. Le, Cheryl A. Woodall, Christopher J. SchenkAssessment of continuous gas resources in the Phosphoria Formation of the Wyoming Thrust Belt Province, Wyoming, Idaho, and Utah, 2017
Using a geology-based assessment methodology, the U.S. Geological Survey estimated mean undiscovered, technically recoverable resources of 198 billion cubic feet of continuous gas in the Phosphoria Formation of the Wyoming Thrust Belt Province, Wyoming, Idaho, and Utah.AuthorsChristopher J. Schenk, Tracey J. Mercier, Marilyn E. Tennyson, Cheryl A. Woodall, Thomas M. Finn, Janet K. Pitman, Stephanie B. Gaswirth, Kristen R. Marra, Phuong A. Le, Timothy R. Klett, Heidi M. Leathers-MillerAssessment of undiscovered conventional oil and gas resources in the Wyoming Thrust Belt Province, Wyoming, Idaho, and Utah, 2017
Using a geology-based assessment methodology, the U.S. Geological Survey estimated mean undiscovered, technically recoverable resources of 26 million barrels of oil and 700 billion cubic feet of gas in the Wyoming Thrust Belt Province, Wyoming, Idaho, and Utah.AuthorsChristopher J. Schenk, Tracey J. Mercier, Marilyn E. Tennyson, Cheryl A. Woodall, Michael E. Brownfield, Phuong A. Le, Timothy R. Klett, Stephanie B. Gaswirth, Thomas M. Finn, Kristen R. Marra, Heidi M. Leathers-MillerAssessment of undiscovered oil and gas resources in the North-Central Montana Province, 2017
Using a geology-based assessment methodology, the U.S. Geological Survey estimated mean undiscovered, technically recoverable resources of 55 million barrels of oil and 846 billion cubic feet of gas in the North-Central Montana Province.AuthorsChristopher J. Schenk, Tracey J. Mercier, Michael E. Brownfield, Marilyn E. Tennyson, Cheryl A. Woodall, Phuong A. Le, Timothy R. Klett, Stephanie B. Gaswirth, Thomas M. Finn, Janet K. Pitman, Kristen R. Marra, Heidi M. Leathers-MillerAssessment of undiscovered oil and gas resources in the Cretaceous Nanushuk and Torok Formations, Alaska North Slope, and summary of resource potential of the National Petroleum Reserve in Alaska, 2017
The U.S. Geological Survey estimated mean undiscovered, technically recoverable resources of 8.7 billion barrels of oil and 25 trillion cubic feet of natural gas (associated and nonassociated) in conventional accumulations in the Cretaceous Nanushuk and Torok Formations in the National Petroleum Reserve in Alaska, adjacent State and Native lands, and State waters. The estimated undiscovered oil reAuthorsDavid W. Houseknecht, Richard O. Lease, Christopher J. Schenk, Tracey J. Mercier, William A. Rouse, Palma J. Botterell, Katherine J. Whidden, Christopher P. Garrity, Kristen A. Lewis, Samuel J. Heller, William H. Craddock, Timothy R. Klett, Phuong A. Le, Rebecca A. Smith, Marilyn E. Tennyson, Stephanie B. Gaswirth, Cheryl A. Woodall, Michael E. Brownfield, Heidi M. Leathers-Miller, Thomas M. FinnProcedure for calculating estimated ultimate recoveries of wells in the Mississippian Barnett Shale, Bend Arch–Fort Worth Basin Province of north-central Texas
In 2015, the U.S. Geological Survey published an assessment of technically recoverable continuous oil and gas resources of the Mississippian Barnett Shale in the Bend Arch–Fort Worth Basin Province of north-central Texas. Of the two assessment units involved in the overall assessment, one included a roughly equal number of oil wells and gas wells as classified by the U.S. Geological Survey’s standAuthorsHeidi M. Leathers-MillerU.S. Geological Survey input-data forms for the assessment of the Spraberry Formation of the Midland Basin, Permian Basin Province, Texas, 2017
In 2017, the U.S. Geological Survey (USGS) completed an updated assessment of undiscovered, technically recoverable oil and gas resources in the Spraberry Formation of the Midland Basin (Permian Basin Province) in southwestern Texas (Marra and others, 2017). The Spraberry Formation was assessed using both the standard continuous (unconventional) and conventional methodologies established by the USAuthorsKristen R. MarraAssessment of undiscovered oil and gas resources in the Ventura Basin Province, California, 2016
The U.S. Geological Survey (USGS) completed a geology-based assessment of undiscovered, technically recoverable conventional and continuous oil and gas resources in the part of the Ventura Basin Province that lies onshore or within State waters (within 3 miles of the shoreline) of California (fig. 1). Conventional oil and gas resources are those that have migrated upward into structural or stratigAuthorsMarilyn E. Tennyson, Christopher J. Schenk, Janet K. Pitman, Paul G. Lillis, Timothy R. Klett, Michael E. Brownfield, Thomas M. Finn, Stephanie B. Gaswirth, Sarah J. Hawkins, Kristen R. Marra, Tracey J. Mercier, Phuong A. Le, Heidi M. Leathers-Miller - Web Tools
Below are datasets related to the National Oil and Gas Assessments.
- News
Below are news stories associated with this project.
- FAQ
Below are FAQ associated with this project.
- Partners
Below are partners associated with this project.