Publications
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Nahcolite resources in the Green River Formation, Piceance Basin, northwestern Colorado
The U.S. Geological Survey (USGS) recently completed an assessment of in-place nahcolite (NaHCO3) resources in the Piceance Basin, northwestern Colorado. Nahcolite is present in the oil shale deposits of the Parachute Creek Member of the Eocene Green River Formation. It occurs as disseminated aggregates, nodules, bedded units of disseminated brown crystals, and white crystalline beds associated wi
Authors
Michael E. Brownfield, Ronald C. Johnson, Jesse G. Self, Tracey J. Mercier
Gas, water, and oil production from the Wasatch Formation, Greater Natural Buttes Field, Uinta Basin, Utah
Gas, oil, and water production data were compiled from 38 wells with production commencing during the 1980s from the Wasatch Formation in the Greater Natural Buttes field, Uinta Basin, Utah. This study is one of a series of reports examining fluid production from tight gas reservoirs, which are characterized by low permeability, low porosity, and the presence of clay minerals in pore space. The ge
Authors
Philip H. Nelson, Eric L. Hoffman
Development of a probabilistic assessment methodology for evaluation of carbon dioxide storage
This report describes a probabilistic assessment methodology developed by the U.S. Geological Survey (USGS) for evaluation of the resource potential for storage of carbon dioxide (CO2) in the subsurface of the United States as authorized by the Energy Independence and Security Act (Public Law 110-140, 2007). The methodology is based on USGS assessment methodologies for oil and gas resources create
Authors
Robert A. Burruss, Sean T. Brennan, Philip A. Freeman, Matthew D. Merrill, Leslie F. Ruppert, Mark F. Becker, William N. Herkelrath, Yousif K. Kharaka, Christopher E. Neuzil, Sharon M. Swanson, Troy A. Cook, Timothy R. Klett, Philip H. Nelson, Christopher J. Schenk
Intertonguing of the lower part of the Uinta Formation with the upper part of the Green River Formation in the Piceance Creek Basin during the late stages of Lake Uinta
During most of middle Eocene time, a 1,500-mi2 area between the Colorado and White Rivers in northwestern Colorado was occupied by the Piceance lobe of Lake Uinta. This initially freshwater lake became increasingly saline throughout its history. Sediments accumulating in the lake produced mostly clay shale, limestone, and dolomite containing varying concentrations of organic matter.At the time of
Authors
John R. Donnell
Stratigraphy and age of the Frontier Formation and associated rocks, central and southern Bighorn Basin, Wyoming - surface to subsurface correlation
No abstract available.
Authors
Mark A. Kirschbaum, E. Allen Merewether, Steven M. Condon
Pore-throat sizes in sandstones, tight sandstones, and shales
Pore-throat sizes in silidclastic rocks form a continuum from the submillimeter to the nanometer scale. That continuum is documented in this article using previously published data on the pore and pore-throat sizes of conventional reservoir rocks, tight-gas sandstones, and shales. For measures of central tendency (mean, mode, median), pore-throat sizes (diameters) are generally greater than 2 μm i
Authors
Philip H. Nelson
Cutler Group alluvial, eolian, and marine deposystems: Permian facies relations and climatic variability in the Paradox Basin
No abstract available.
Authors
Russell F. Dubiel, Jacqueline E. Huntoon, John D. Stanesco, Steven M. Condon
Petroleum systems used to determine the assessment units in the San Joaquin Basin Province, California
For the San Joaquin Basin Province in California (fig. 8.1), six petroleum systems were identified, mapped, and described to provide the basis for the five total petroleum systems (TPS) and ten related assessment units (AU) used in the 2003 U.S. Geological Survey (USGS) National Oil and Gas Assessment (table 8.1; Gautier and others, 2004; Hosford Scheirer, 2007). The petroleum pools in the provinc
Authors
Leslie B. Magoon, Paul G. Lillis, Kenneth E. Peters
Fossils, lithologies, and geophysical logs of the Mancos Shale from core hole USGS CL-1 in Montrose County, Colorado
As part of a multidisciplinary investigation of Mancos Shale landscapes in the Gunnison Gorge National Conservation Area in Delta and Montrose Counties of western Colorado by the U.S. Geological Survey, Bureau of Land Management, and Bureau of Reclamation, a core of the Upper Cretaceous Mancos Shale was obtained from a borehole, USGS CL-1, in NE1/4 sec. 8, T. 50 N., R. 9 W. (approximately lat 38.6
Authors
Bridget A. Ball, W. A. Cobban, E. A. Merewether, R. I. Grauch, K.C. McKinney, K.E. Livo
An estimate of recoverable heavy oil resources of the Orinoco Oil Belt, Venezuela
The Orinoco Oil Belt Assessment Unit of the La Luna-Quercual Total Petroleum System encompasses approximately 50,000 km2 of the East Venezuela Basin Province that is underlain by more than 1 trillion barrels of heavy oil-in-place. As part of a program directed at estimating the technically recoverable oil and gas resources of priority petroleum basins worldwide, the U.S. Geological Survey estimate
Authors
Christopher J. Schenk, Troy A. Cook, Ronald R. Charpentier, Richard M. Pollastro, Timothy R. Klett, Marilyn E. Tennyson, Mark A. Kirschbaum, Michael E. Brownfield, Janet K. Pitman
Models for gas hydrate-bearing sediments inferred from hydraulic permeability and elastic velocities
Elastic velocities and hydraulic permeability of gas hydrate-bearing sediments strongly depend on how gas hydrate accumulates in pore spaces and various gas hydrate accumulation models are proposed to predict physical property changes due to gas hydrate concentrations. Elastic velocities and permeability predicted from a cementation model differ noticeably from those from a pore-filling model. A n
Authors
Myung W. Lee
Comparison of the modified Biot-Gassmann theory and the Kuster-Toksöz theory in predicting elastic velocities of sediments
Elastic velocities of water-saturated sandstones depend primarily on porosity, effective pressure, and the degree of consolidation. If the dry-frame moduli are known, from either measurements or theoretical calculations, the effect of pore water on velocities can be modeled using the Gassmann theory. Kuster and Toksoz developed a theory based on wave-scattering theory for a variety of inclusion sh
Authors
Myung W. Lee