Gulf Coast Geologic Energy Research
USGS Research Drilling Rig in Kinney County, TX, in 2018
Vista of Buda, Eagle Ford, and Austin Formations, Terrell County, TX
The Gulf Coast Geologic Energy Assessments and Research (GEAR) project also conducts research on the properties and processes relevant to the Gulf Coast Jurassic-Cretaceous-Tertiary composite total petroleum system (TPS). This research aims to improve ongoing and future undiscovered, technically recoverable hydrocarbon resources assessments on the onshore and State waters portion of the Gulf Coast basin. Important research avenues include the nature and distribution of source rocks, reservoirs, traps, and seals as well as how the temporal evolution of the TPS affected petroleum migration and accumulations.
Research efforts on the Gulf Coast GEAR project include a focus on Jurassic and Cretaceous petroleum source intervals and charged reservoirs to support the prioritization of hydrocarbon resources assessments in Mesozoic strata. The project also plans to investigate potential energy resources in the Atlantic Coastal Plain provinces and adjacent offshore areas as they are analogous to the Gulf Coast region.
The Gulf Coast GEAR project is also constructing a subsurface geoscience database that will include type logs across the U.S. Gulf Coast basin and contain geophysical logs, interpreted geologic formation top depths, and paleontological data. This effort is a response to the 2018 review of the USGS Energy Resources Program by the U.S. National Academies of Sciences, Engineering, and Medicine, which indicated that the program should improve its ability to make petroleum resource data publicly available in a timely manner. Data from the subsurface geoscience and source rock databases are vital for the characterization of hydrocarbon plays by the stakeholder as well as for potential geologic carbon sequestration, subsurface energy store, or paleoclimate reconstruction.
Another research goal is to conduct more robust and interdisciplinary source rock studies on organic-rich mudstones, which can be considered the foundations of petroleum systems. Source rock properties vary both vertically within a stratigraphic unit and geographically across a basin or region. These spatial patterns of source rock composition variability influence the development of hydrocarbon assessment unit boundaries. Increased understanding of controls on source rock formation, compositional variability, and thermal maturity trends can inform the development of geologic models used in USGS petroleum resource assessments. This research on organic-rich mudstone source rocks may also provide insights into paleoclimate, carbon cycling, and oceanic conditions to better understand how conditions in the past varied and changed over time.
Below are other science projects associated with this project.
Gulf Coast Geologic Energy Assessments
Below are data or web applications associated with this project.
Detrital Zircon U-Pb data from selected Appalachian rivers and Outer Banks-area coastal sediments Detrital Zircon U-Pb data from selected Appalachian rivers and Outer Banks-area coastal sediments
Delta log R total organic carbon estimates for the Tuscaloosa marine shale, U.S.A. Delta log R total organic carbon estimates for the Tuscaloosa marine shale, U.S.A.
United States Gulf Coast Basin Curated Wells and Logs Database (ver. 4.0, September 2025) United States Gulf Coast Basin Curated Wells and Logs Database (ver. 4.0, September 2025)
Wireline geophysical logging curves and infrared spectral data for the USGS Gulf Coast #1 West Woodway research wellbore, McLennan County, Texas Wireline geophysical logging curves and infrared spectral data for the USGS Gulf Coast #1 West Woodway research wellbore, McLennan County, Texas
Apatite and zircon U/Pb and fission track geochronologic and thermochronologic data along the Fall Line of the southeastern United States Apatite and zircon U/Pb and fission track geochronologic and thermochronologic data along the Fall Line of the southeastern United States
U-Pb ages of detrital zircons in Paleogene strata of the Gulf Coast U-Pb ages of detrital zircons in Paleogene strata of the Gulf Coast
Below are publications associated with this project.
Regional characterization of coal resources in the U.S. Gulf Coast Regional characterization of coal resources in the U.S. Gulf Coast
Estimated ultimate recovery (EUR) Prediction for Eagle Ford Shale using integrated datasets and artificial neural networks Estimated ultimate recovery (EUR) Prediction for Eagle Ford Shale using integrated datasets and artificial neural networks
Discerning sediment provenance in the Outer Banks (USA) through detrital zircon geochronology Discerning sediment provenance in the Outer Banks (USA) through detrital zircon geochronology
Comparison of measured versus modeled TOC in the Tuscaloosa marine shale of Southwestern Mississippi, U.S.A. Comparison of measured versus modeled TOC in the Tuscaloosa marine shale of Southwestern Mississippi, U.S.A.
Spatial distribution of API gravity and gas/oil ratios for petroleum accumulations in Upper Cretaceous strata of the San Miguel, Olmos, and Escondido Formations of the south Texas Maverick Basin—Implications for petroleum migration and charge history Spatial distribution of API gravity and gas/oil ratios for petroleum accumulations in Upper Cretaceous strata of the San Miguel, Olmos, and Escondido Formations of the south Texas Maverick Basin—Implications for petroleum migration and charge history
Defining the hafnium isotopic signature of the Appalachian orogen through analysis of detrital zircons from modern fluvial sediments Defining the hafnium isotopic signature of the Appalachian orogen through analysis of detrital zircons from modern fluvial sediments
Below are news stories associated with this project.
The Gulf Coast Geologic Energy Assessments and Research (GEAR) project also conducts research on the properties and processes relevant to the Gulf Coast Jurassic-Cretaceous-Tertiary composite total petroleum system (TPS). This research aims to improve ongoing and future undiscovered, technically recoverable hydrocarbon resources assessments on the onshore and State waters portion of the Gulf Coast basin. Important research avenues include the nature and distribution of source rocks, reservoirs, traps, and seals as well as how the temporal evolution of the TPS affected petroleum migration and accumulations.
Research efforts on the Gulf Coast GEAR project include a focus on Jurassic and Cretaceous petroleum source intervals and charged reservoirs to support the prioritization of hydrocarbon resources assessments in Mesozoic strata. The project also plans to investigate potential energy resources in the Atlantic Coastal Plain provinces and adjacent offshore areas as they are analogous to the Gulf Coast region.
The Gulf Coast GEAR project is also constructing a subsurface geoscience database that will include type logs across the U.S. Gulf Coast basin and contain geophysical logs, interpreted geologic formation top depths, and paleontological data. This effort is a response to the 2018 review of the USGS Energy Resources Program by the U.S. National Academies of Sciences, Engineering, and Medicine, which indicated that the program should improve its ability to make petroleum resource data publicly available in a timely manner. Data from the subsurface geoscience and source rock databases are vital for the characterization of hydrocarbon plays by the stakeholder as well as for potential geologic carbon sequestration, subsurface energy store, or paleoclimate reconstruction.
Another research goal is to conduct more robust and interdisciplinary source rock studies on organic-rich mudstones, which can be considered the foundations of petroleum systems. Source rock properties vary both vertically within a stratigraphic unit and geographically across a basin or region. These spatial patterns of source rock composition variability influence the development of hydrocarbon assessment unit boundaries. Increased understanding of controls on source rock formation, compositional variability, and thermal maturity trends can inform the development of geologic models used in USGS petroleum resource assessments. This research on organic-rich mudstone source rocks may also provide insights into paleoclimate, carbon cycling, and oceanic conditions to better understand how conditions in the past varied and changed over time.
Below are other science projects associated with this project.
Gulf Coast Geologic Energy Assessments
Below are data or web applications associated with this project.
Detrital Zircon U-Pb data from selected Appalachian rivers and Outer Banks-area coastal sediments Detrital Zircon U-Pb data from selected Appalachian rivers and Outer Banks-area coastal sediments
Delta log R total organic carbon estimates for the Tuscaloosa marine shale, U.S.A. Delta log R total organic carbon estimates for the Tuscaloosa marine shale, U.S.A.
United States Gulf Coast Basin Curated Wells and Logs Database (ver. 4.0, September 2025) United States Gulf Coast Basin Curated Wells and Logs Database (ver. 4.0, September 2025)
Wireline geophysical logging curves and infrared spectral data for the USGS Gulf Coast #1 West Woodway research wellbore, McLennan County, Texas Wireline geophysical logging curves and infrared spectral data for the USGS Gulf Coast #1 West Woodway research wellbore, McLennan County, Texas
Apatite and zircon U/Pb and fission track geochronologic and thermochronologic data along the Fall Line of the southeastern United States Apatite and zircon U/Pb and fission track geochronologic and thermochronologic data along the Fall Line of the southeastern United States
U-Pb ages of detrital zircons in Paleogene strata of the Gulf Coast U-Pb ages of detrital zircons in Paleogene strata of the Gulf Coast
Below are publications associated with this project.
Regional characterization of coal resources in the U.S. Gulf Coast Regional characterization of coal resources in the U.S. Gulf Coast
Estimated ultimate recovery (EUR) Prediction for Eagle Ford Shale using integrated datasets and artificial neural networks Estimated ultimate recovery (EUR) Prediction for Eagle Ford Shale using integrated datasets and artificial neural networks
Discerning sediment provenance in the Outer Banks (USA) through detrital zircon geochronology Discerning sediment provenance in the Outer Banks (USA) through detrital zircon geochronology
Comparison of measured versus modeled TOC in the Tuscaloosa marine shale of Southwestern Mississippi, U.S.A. Comparison of measured versus modeled TOC in the Tuscaloosa marine shale of Southwestern Mississippi, U.S.A.
Spatial distribution of API gravity and gas/oil ratios for petroleum accumulations in Upper Cretaceous strata of the San Miguel, Olmos, and Escondido Formations of the south Texas Maverick Basin—Implications for petroleum migration and charge history Spatial distribution of API gravity and gas/oil ratios for petroleum accumulations in Upper Cretaceous strata of the San Miguel, Olmos, and Escondido Formations of the south Texas Maverick Basin—Implications for petroleum migration and charge history
Defining the hafnium isotopic signature of the Appalachian orogen through analysis of detrital zircons from modern fluvial sediments Defining the hafnium isotopic signature of the Appalachian orogen through analysis of detrital zircons from modern fluvial sediments
Below are news stories associated with this project.