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.
Below are data or web applications associated with this project.
USGS Gulf Coast Source Rock Database (ver. 2.0, October 2023)
Data Release for "Comparability and reproducibility of biomarker ratio values measured by GC-QQQ-MS"
Input forms for 2019 water and proppant assessment of the Eagle Ford Group, Gulf Coast, Texas
Oil-source rock correlation studies in the unconventional Upper Cretaceous Tuscaloosa marine shale petroleum system, Mississippi and Louisiana, USA (2019)
USGS Gulf Coast Petroleum Systems and National and Global Oil and Gas Assessment Projects-Louisiana-Mississippi Salt Basins and Western Gulf Provinces, Upper Cretaceous Tuscaloosa Marine Shale Assessment Unit Boundaries and Assessment Input Data Forms
Geochemistry data for the USGS Gulf Coast #1 West Woodway core - A thermally immature core of the Eagle Ford Group in central Texas (ver. 1.1, April 2025)
Below are publications associated with this project.
Quantitative modeling of secondary migration: Understanding the origin of natural gas charge of the Haynesville Formation in the Sabine Uplift area of Louisiana and Texas
Geochemical and mineralogical properties of Boquillas Shale geochemical reference material ShBOQ-1
Multivariate classification of the crude oil petroleum systems in southeast Texas, USA, using conventional and compositional data analysis of biomarkers
Characterization of the unconventional Tuscaloosa marine shale reservoir in southwestern Mississippi, USA: Insights from optical and SEM petrography
Trends in thermal maturity indicators for the organic sulfur-rich Eagle Ford Shale
Detrital zircon age spectra of middle and upper Eocene outcrop belts, U.S. Gulf Coast region
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.
Below are data or web applications associated with this project.
USGS Gulf Coast Source Rock Database (ver. 2.0, October 2023)
Data Release for "Comparability and reproducibility of biomarker ratio values measured by GC-QQQ-MS"
Input forms for 2019 water and proppant assessment of the Eagle Ford Group, Gulf Coast, Texas
Oil-source rock correlation studies in the unconventional Upper Cretaceous Tuscaloosa marine shale petroleum system, Mississippi and Louisiana, USA (2019)
USGS Gulf Coast Petroleum Systems and National and Global Oil and Gas Assessment Projects-Louisiana-Mississippi Salt Basins and Western Gulf Provinces, Upper Cretaceous Tuscaloosa Marine Shale Assessment Unit Boundaries and Assessment Input Data Forms
Geochemistry data for the USGS Gulf Coast #1 West Woodway core - A thermally immature core of the Eagle Ford Group in central Texas (ver. 1.1, April 2025)
Below are publications associated with this project.
Quantitative modeling of secondary migration: Understanding the origin of natural gas charge of the Haynesville Formation in the Sabine Uplift area of Louisiana and Texas
Geochemical and mineralogical properties of Boquillas Shale geochemical reference material ShBOQ-1
Multivariate classification of the crude oil petroleum systems in southeast Texas, USA, using conventional and compositional data analysis of biomarkers
Characterization of the unconventional Tuscaloosa marine shale reservoir in southwestern Mississippi, USA: Insights from optical and SEM petrography
Trends in thermal maturity indicators for the organic sulfur-rich Eagle Ford Shale
Detrital zircon age spectra of middle and upper Eocene outcrop belts, U.S. Gulf Coast region
Below are news stories associated with this project.