17 research outputs found
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Bloating characteristics of east Texas clays
Bureau Publication GC6501 - to purchase a print copy please go to: https://store.beg.utexas.edu/geologic-circulars/383-gc6501.htmlIncidence of bloating among approximately 600 clay samples from East Texas, ranging in age from Gulfian (Late Cretaceous) to Recent, correlates principally with clay mineralogy-and pH--together an indication of bulk composition--and to a lesser extent with texture, loss on ignition, and content of nonclay refractory minerals. Clay-mineral and pH data permit prediction of bloating with an accuracy of about 80 percent. Montmorillonitic and illitic clays are the best bloaters; bloating occurs in more than 80 percent of clays consisting of less than 30 percent kaolinite, more than l 0 percent illite, and between 20 and 90 percent montmorillonite. Only 10 percent of the high-alumina clays (more than 50 percent kaolinite) bloat; these generally are plastic and carbonaceous. Value of pH is an index of the amount of certain flux and gas-forming materials in clays; accordingly, bloating incidence generally increases with increase in pH. Incidence of bloating also increases slightly with decrease in grain size, increase in plasticity, increase in loss on ignition, and decrease in content of nonclay refractory minerals.Bureau of Economic GeologyUT Librarie
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An Assessment of the Oil Resource Base of the United States
A select panel of oil resource analysts, convened in August 1992 by the Bureau of Economic Geology, The University of Texas at Austin, and the National Institute for Petroleum and Energy Research (NIPER) at the request of the U.S. Department of Energy, concludes that the remaining, recoverable volume of crude oil in the United States ranges from 99 to 204 billion barrels, inclusive of 25 billion barrels of oil carried as proved reserves by the Energy Information Administration at the end of 1991. The range in estimates reflects different assumptions of price and technology (including the geological ability to apply that technology). The lower estimate assumes a stable oil price of 27 per barrel (1992 dollars) but with advanced technology. The range in estimates of the remaining resource base recoverable under the given assumptions is equivalent to 35 to 75 years of continued U.S. crude oil production at the current annual rate of 2.7 billion barrels.Bureau of Economic Geolog
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An Assessment of the Natural Gas Resource Base of the United States
The distribution of natural gas in the United States comprises proved reserves in known reservoirs, inferred reserves, undeveloped resources within these reservoirs, and undiscovered resources. Beyond proved reserves, all volumes of future natural gas supply are estimates based on information derived from past and current experience in gas production and reservoir development. Even proved reserves are subject to periodic revision. This assessment begins with an understanding of major components of the natural gas supply derived from existing resource estimates that use established methodologies. In addition to historically defined elements of the resource base, a new component—reserve growth in heterogeneous reservoirs—is quantified in this study.
Resource assessments proceed in their planning and compilation from reasonably well-known quantities (proved reserves) to increasingly less well-known quantities (undiscovered resources). Furthermore, natural gas reservoirs termed unconventional are typically given separate consideration and include gas in low-permeability reservoirs, gas in shale formations such as the Devonian of the Eastern U.S., and coalbed methane resources. This approach has been followed in this assessment. Special note was made of Alaskan gas reserves as they are significant and proven, but transportation for North Slope gas to the Lower 48 states is lacking.Bureau of Economic Geolog
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Depositional systems in the Wilcox Group of Texas and their relationship to occurrence of oil and gas
Reprinted from Transactions of the Gulf Coast Association of Geological Societies, v. 17, 1967UT Librarie
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Depositional systems in the Jackson Group of Texas : their relationship to oil, gas, and uranium
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Evolution of Athleta petrosa stock (Eocene, gastropoda) of Texas
Accompanied by 6 foldout plates -- Plate 1 : Occurrence of Athleta petrosa stock in Texas. Plate 2 : Evolution of Athleta petrosa stock. Plate 3 : Summary histograms of measured and computed data. Plate 4 : Fortran Program I for calculating statistical summary of primary and secondary data. Plate 5 : Fortran Program II for plotting scatter diagrams and cumulative curves. Plate 6 : Contoured scatter diagrams of Athleta petrosa stockUT Librarie
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Rock and mineral resources of East Texas
This study was made under contract no. Cc-5949 with the Area Redevelopment Administration, Technical Assistance Project, U.S. Dept. of Commerce.UT Librarie
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Lower Cretaceous sands of Texas ; stratigraphy and resources
Accompanied by 3 plates. Plate I : Geologic map of Lower Cretaceous sands and associated formations, Texas. Plate II : Stratigraphic and nomenclatural units, basal Cretaceous rocks of Texas. Plate III : Areal characteristics (mean grain size and sorting) of principal Lower Cretaceous sands, TexasUT Librarie
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Texas energy reserves and resources
"This report is based on testimony originally presented to the Texas House of Representatives Interim Committee on Energy Resources, February 16, 1978."UT Librarie