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Thursday, November 02, 2017

Position-specific 13C distributions within propane from experiments and natural gas samples

Outside Publication: Geochimica et Cosmochimica Acta
Site-specific carbon isotope measurements of organic compounds potentially recover information that is lost in a conventional, ‘bulk’ isotopic analysis. Such measurements are useful because isotopically fractionating processes may have distinct effects at different molecular sites, and thermodynamically equilibrated populations...

Thursday, November 02, 2017

High-resolution seismic characterization of the gas and gas hydrate system at Green Canyon 955, Gulf of Mexico, USA

Outside Publication: Marine and Petroleum Geology
The Pliocene and Pleistocene sediments at lease block Green Canyon 955 (GC955) in the Gulf of Mexico include sand-rich strata with high saturations of gas hydrate; these gas hydrate accumulations and the associated geology have been characterized over the past decade using conventional industry three-dimensional...

Friday, October 27, 2017

Grade, tonnage, and location data for world calcrete-type surficial uranium deposits

USGS Publication: Data Release
Grade and tonnage data for calcrete-type surficial uranium deposits found in 11 different countries were compiled. Fifty-eight deposits with reported grade and tonnage, and thirty-five occurrences for which there is no reported resource are tabulated in separate Excel workbook spreadsheets...

Wednesday, August 23, 2017

A Database and Probabilistic Assessment Methodology for Carbon Dioxide-enhanced Oil Recovery and Associated Carbon Dioxide Retention in the United States

Outside Publication: Energy Procedia
The U.S. Geological Survey (USGS) has developed an assessment methodology for estimating the potential incremental technically recoverable oil resources resulting from carbon dioxide-enhanced oil recovery (CO2-EOR) in reservoirs with appropriate depth, pressure, and oil composition...

Wednesday, August 23, 2017

Chemical and Isotopic Evidence for CO2 Charge and Migration within Bravo Dome and Potential CO2 Leakage to the Southwest

Outside Publication: Energy Procedia
Gas analyses from northeastern New Mexico, USA indicate that previous interpretations of the location of gas charge into the northeastern portion of Bravo Dome are likely correct, and that there may be multiple migration pathways from the same source for different regions in northeastern New Mexico...

Monday, August 07, 2017

Mantle and crustal gases of the Colorado Plateau: Geochemistry, sources, and migration pathways

Outside Publication: Geochimica et Cosmochimica Acta

The Colorado Plateau hosts several large accumulations of naturally occurring, non-hydrocarbon gases, including CO2, N2, and the noble gases, making it a good field location to study the fluxes of these gases within the crust and to the atmosphere...


Wednesday, August 02, 2017

3D Pressure-limited approach to model and estimate CO2 injection and storage capacity: saline Mount Simon Formation

Outside Publication: Greenhouse Gases Science and Technology
To estimate the carbon dioxide (CO2) injection and storage capacity of saline formations, we used Tough2-ECO2N simulation software to develop a pressure-limited (dynamic) simulation approach based on applying three-dimensional (3D)...

Wednesday, July 19, 2017

Neutron Scattering Measurements of Carbon Dioxide Adsorption in Pores within the Marcellus Shale: Implications for Sequestration

Outside Publication: Environmental Science & Technology
Shale is an increasingly viable source of natural gas and a potential candidate for geologic CO2 sequestration. Understanding the gas adsorption behavior on shale is necessary for the design of optimal gas recovery and sequestration projects. In the present study neutron diffraction and small-angle neutron scattering measurements of adsorbed CO2 in Marcellus Shale...

Wednesday, May 31, 2017

Methane and Benzene in Drinking-Water Wells Overlying the Eagle Ford, Fayetteville, and Haynesville Shale Hydrocarbon Production Areas

Outside Publication: Environmental Science & Technology
Water wells (n = 116) overlying the Eagle Ford, Fayetteville, and Haynesville Shale hydrocarbon production areas were sampled for chemical, isotopic, and groundwater-age tracers to investigate the occurrence and sources of selected hydrocarbons in groundwater...

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