Publications
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U.S. Geological Survey assessment of reserve growth outside of the United States
The U.S. Geological Survey estimated volumes of potential additions to oil and gas reserves for the United States by reserve growth in discovered accumulations. These volumes were derived by using a new methodology developed by the U.S. Geological Survey and reviewed by the American Association of Petroleum Geologists Committee on Resource Evaluation. This methodology was used to assess reserve gr
Authors
Timothy R. Klett, Troy A. Cook, Ronald R. Charpentier, Marilyn E. Tennyson, Phuong A. Le
Assessment of undiscovered shale gas and shale oil resources in the Mississippian Barnett Shale, Bend Arch–Fort Worth Basin Province, North-Central Texas
Using a geology-based assessment methodology, the U.S. Geological Survey estimated mean volumes of 53 trillion cubic feet of shale gas, 172 million barrels of shale oil, and 176 million barrels of natural gas liquids in the Barnett Shale of the Bend Arch–Fort Worth Basin Province of Texas.
Authors
Kristen R. Marra, Ronald R. Charpentier, Christopher J. Schenk, Michael D. Lewan, Heidi M. Leathers-Miller, Timothy R. Klett, Stephanie B. Gaswirth, Phuong A. Le, Tracey J. Mercier, Janet K. Pitman, Marilyn E. Tennyson
Radiometric dating of marine-influenced coal using Re–Os geochronology
Coal deposits are integral to understanding the structural evolution and thermal history of sedimentary basins and correlating contemporeous estuarine and fluvial delatic strata with marine sections. While marine shales may readily lend themselves to Re–Os dating due to the dominance of hydrogenous Re and Os, the lack of a chronometer for near-shore sedimentary environments hampers basinwide corr
Authors
Gyana Ranjan Tripathy, Judith L. Hannah, Holly J. Stein, Nicholas J. Geboy, Leslie F. Ruppert
Architecture and evolution of an Early Permian carbonate complex on a tectonically active island in east-central California
The newly named Upland Valley Limestone represents a carbonate complex that developed on and adjacent to a tectonically active island in east-central California during a brief interval of Early Permian (late Artinskian) time. This lithologically unique, relatively thin limestone unit lies within a thick sequence of predominantly siliciclastic rocks and is characterized by its high concentration of
Authors
Calvin H. Stevens, Robert T. Magginetti, Paul Stone
Stratigraphy and paleogeographic significance of a Late Pennsylvanian to Early Permian channeled slope sequence in the Darwin Basin, southern Darwin Hills, east-central California
The complex stratigraphy of late Paleozoic rocks in the southern Darwin Hills consists of regionally extensive Mississippian and Early to Middle Pennsylvanian rocks overlain by latest Pennsylvanian to Early Permian rocks, herein called the Darwin Hills sequence. Deposition of this latter sequence marked the beginning of the Darwin Basin. In Mississippian time, a carbonate platform prograded westwa
Authors
Calvin H. Stevens, Paul Stone, Robert T. Magginetti, Scott M. Ritter
Regional implications of new chronostratigraphic and paleogeographic data from the Early Permian Darwin Basin, east-central California
The Darwin Basin developed in response to episodic subsidence of the western margin of the Cordilleran continental shelf from Late Pennsylvanian (Gzhelian) to Early Permian (late Artinskian) time. Subsidence of the basin was initiated in response to continental truncation farther to the west and was later augmented by thrust emplacement of the Last Chance allochthon. This deep-water basin was fill
Authors
Calvin H. Stevens, Paul Stone, Robert T. Magginetti
Assessment of undiscovered sandstone-hosted uranium resources in the Texas Coastal Plain, 2015
The U.S. Geological Survey estimated a mean of 220 million pounds of recoverable uranium oxide (U3O8 ) remaining as potential undiscovered resources in southern Texas. This estimate used a geology-based assessment method for Tertiary sandstone-hosted uranium deposits in the Texas Coastal Plain sedimentary strata (fig.1).
Authors
Mark J. Mihalasky, Susan M. Hall, Jane M. Hammarstrom, Kathleen R. Tureck, Mark T. Hannon, George N. Breit, Robert A. Zielinski, Brent Elliott
Petrology and reservoir quality of the Gaikema Sandstone: Initial impressions
The Division of Geological & Geophysical Surveys (DGGS) and Division of Oil & Gas (DOG) are currently conducting a study of the hydrocarbon potential of Cook Inlet basin (LePain and others, 2011). The Tertiary stratigraphic section of the basin includes coal-bearing units that are prolific gas reservoirs, particularly the Neogene sandstones. The Paleogene sandstones are locally prolific oil reserv
Authors
Kenneth P. Helmold, Richard G. Stanley
Probabilistic 3-D time-lapse inversion of magnetotelluric data: Application to an enhanced geothermal system
Surface-based monitoring of mass transfer caused by injections and extractions in deep boreholes is crucial to maximize oil, gas and geothermal production. Inductive electromagnetic methods, such as magnetotellurics, are appealing for these applications due to their large penetration depths and sensitivity to changes in fluid conductivity and fracture connectivity. In this work, we propose a 3-D M
Authors
Marina Rosas-Carbajal, Nicolas Linde, Jared R. Peacock, F. I. Zyserman, Thomas Kalscheuer, Stephan Thiel
A practical guide to the use of major elements, trace elements, and isotopes in compositional data analysis: Applications for deep formation brine geochemistry
In the geosciences, isotopic ratios and trace element concentrations are often used along with major element concentrations to help determine sources of and processes affecting geochemical variation. Compositional Data Analysis (CoDA) is a set of tools, generally attuned to major element data, concerned with the proper statistical treatment and removal of spurious correlations from compositional d
Authors
Madalyn S. Blondes, Mark A. Engle, Nicholas Geboy
Unconventional energy resources: 2015 review. Shale gas and liquids
Introduction
As the source rocks from which petroleum is generated, organic-rich shales have always been considered an important component of petroleum systems. Over the last few years, it has been realized that in some mudrocks, sufficient hydrocarbons remain in place to allow for commercial development, although advanced drilling and completion technology is typically required to access hydro
Authors
Neil S. Fishman, Kent Bowker, Harris Cander, Brian Cardott, Marc Charette, Kenneth Chew, Thomas Chidsey, Russell F. Dubiel, Sven O. Egenhoff, Catherine B. Enomoto, Ursula Hammes, William Harrison, Shu Jiang, Julie A. LeFever, Jock McCracken, Stephen Nordeng, Richard Nyahay, Stephen Sonnenberg, Michael Vanden Berg
Persistent U(IV) and U(VI) following in-situ recovery (ISR) mining of a sandstone uranium deposit, Wyoming, USA
Drill-core samples from a sandstone-hosted uranium (U) deposit in Wyoming were characterized to determine the abundance and distribution of uranium following in-situ recovery (ISR) mining with oxygen- and carbon dioxide-enriched water. Concentrations of uranium, collected from ten depth intervals, ranged from 5 to 1920 ppm. A composite sample contained 750 ppm uranium with an average oxidation st
Authors
Tanya J. Gallegos, Kate M. Campbell, Robert A. Zielinski, P.W. Reimus, J.T. Clay, N. Janot, J. J. Bargar, William Benzel