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Multi-Attribute Seismic/Rock Physics Approach to Characterizing Fractured Reservoirs

Description: Most current seismic methods to seismically characterize fractures in tight reservoirs depend on a few anisotropic wave propagation signatures that can arise from aligned fractures. While seismic anisotropy can be a powerful fracture diagnostic, a number of situations can lessen its usefulness or introduce interpretation ambiguities. Fortunately, laboratory and theoretical work in rock physics indicates that a much broader spectrum of fracture seismic signatures can occur, including a decrease … more
Date: November 30, 2004
Creator: Mavko, Gary
Partner: UNT Libraries Government Documents Department
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Source characterization of selected North Caspian events from the relative excitation of regional phases. Final report

Description: Seismograms of seven recent events (presumed underground nuclear explosions) which occurred during 1976-1979 in the North Caspian Sea region of the western Soviet Kazakh are compared at regional distances for their relative source excitation characteristics. The body wave magnitude estimates of these events range from 5.1 to 6.0. The data consist of analog and digital records collected at stations ranging in instrumental sophistication from temporary sites with single component smoke drum capab… more
Date: November 1, 1981
Creator: Niazi, M.
Partner: UNT Libraries Government Documents Department
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Seismic data catalog and associated graphical capabilities

Description: To facilitate the use of the enormous amount of earthquake data presently available, Pacific Northwest Laboratory (PNL) formed an extensive data base of compiled seismic data. PNL also developed many useful and unique computer techniques for analysis and display of the data. These techniques could be used in many areas of the United States to support nuclear waste management and other energy-related activities. Software associated with the data base includes programs for editing earthquake file… more
Date: November 1, 1979
Creator: Bishop, T.N.; Foote, H.P. & Blair, S.C.
Partner: UNT Libraries Government Documents Department
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Rocking and overturning response of rigid bodies to earthquake motions: a report of an analytical and experimental study on the rocking and overturning response of rigid blocks to simultaneous horizontal and vertical accelerations

Description: A fundamental study of the rocking and overturning response of massive concrete blocks (with relatively high aspect ratio) to simultaneous horizontal and vertical earthquake ground motions is presented. This problem occurs when large concrete blocks are used as radiation shields in particle accelerators or similar nuclear installations. The results of this study also offer insight into the response of the rigid bodies (such as are approximated by some electrical machinery and mechanical equipme… more
Date: November 1, 1978
Creator: Aslam, M.; Godden, W.G. & Scalise, D.T.
Partner: UNT Libraries Government Documents Department
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Earthquake damage to underground facilities

Description: The potential seismic risk for an underground nuclear waste repository will be one of the considerations in evaluating its ultimate location. However, the risk to subsurface facilities cannot be judged by applying intensity ratings derived from the surface effects of an earthquake. A literature review and analysis were performed to document the damage and non-damage due to earthquakes to underground facilities. Damage from earthquakes to tunnels, s, and wells and damage (rock bursts) from minin… more
Date: November 1, 1978
Creator: Pratt, H.R. & Hustrulid, W.A. Stephenson, D.E.
Partner: UNT Libraries Government Documents Department
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Response to"Analysis of the Treatment, by the U.S. Department of Energy, of the FEP Hydrothermal Activity in the Yucca Mountain Performance Assessment" by Yuri Dublyansky

Description: This paper presents a rebuttal to Dublyansky (2007), which misrepresents technical issues associated with hydrothermal activity at the proposed Yucca Mountain nuclear waste repository and their importance to the long-term performance of the repository. In this paper, questions associated with hydrothermal activity are reviewed and the justification for exclusion of hydrothermal activity from performance assessment is presented. The hypothesis that hydrothermal upwelling into the present-day uns… more
Date: November 17, 2008
Creator: Houseworth, J.E. & Hardin, E.
Partner: UNT Libraries Government Documents Department
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Characterize Framework for Igneous Activity at Yucca Mountain, Nevada

Description: The purpose of this Analysis/Model (AMR) report is twofold. (1) The first is to present a conceptual framework of igneous activity in the Yucca Mountain region (YMR) consistent with the volcanic and tectonic history of this region and the assessment of this history by experts who participated in the Probabilistic Volcanic Hazard Analysis (PVHA) (CRWMS M&O 1996). Conceptual models presented in the PVHA are summarized and extended in areas in which new information has been presented. Alternat… more
Date: November 6, 2000
Creator: Perry, F. & Youngs, B.
Partner: UNT Libraries Government Documents Department
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Center for Volcanic and Tectonic Studies, Department of Geoscience annual report, October 1, 1989--September 30, 1990

Description: This report summarizes our activities during the period October 1, 1989 to September 30, 1990. Our goal was to develop an understanding of late-Miocene and Pliocene volcanism in the Great Basin by studying Pliocene volcanoes in the vicinity of the proposed high-level nuclear waste repository at Yucca Mountain, Nevada. Field studies during this period concentrated on the Quaternary volcanoes in Crater Flat, Yucca Mountain, Fortification Hill, at Buckboard Mesa and Sleeping Butte, and in the Reve… more
Date: November 1, 1990
Creator: Smith, E.I.
Partner: UNT Libraries Government Documents Department
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Structural fabric and in-situ stress analyses of the Roosevelt Hot Springs KGRA

Description: The Roosevelt Hot Springs Known Geothermal Resource Area (KGRA) is a hot-water dominated system in fractured plutonic and metamorphic rock. A principal purpose of this study was to determine the geometry and origin of fractures as an aid to developing a structural model for the reservoir. The results may also be useful for the design of hydrofracture experiments at the Roosevelt KGRA. Three major normal fault trends are present in the Mineral Mountains. North-northeast trending faults, includin… more
Date: November 1, 1979
Creator: Yusas, M.R. & Bruhn, R.L.
Partner: UNT Libraries Government Documents Department
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Seismic Studies in Austin-Pleasant Bayou and Cuero Prospects - a Summary of Research Activities

Description: Studies based partly on pre-existing or recently acquired seimic data were designed to confirm or improve the geological interpretation and resource assessment of geopressure geothermal prospect areas in Texas. Other objectives were (1) to evaluate seismic signatures as indicators of lithologic properties, (2) to assist in projecting structural and stratigraphic information beyond the limits of well control, and (3) to investigate processing techniques that enhance data displays by improving si… more
Date: November 1980
Creator: Morton, R. A.; Winker, C. D. & Garcia, D. A.
Partner: UNT Libraries Government Documents Department
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Surface-wave generation by underground nuclear explosions releasing tectonic strain

Description: Seismic surface-wave generation by underground nuclear explosions releasing tectonic strain is studied through a series of synthetic radiation-pattern calculations based on the earthquake-trigger model. From amplitude and phase radiation patterns for 20-s Rayleigh waves, inferences are made about effects on surface-wave magnitude, M/sub s/, and waveform character. The focus of this study is a comparison between two mechanisms of tectonic strain release: strike-slip motion on vertical faults and… more
Date: November 3, 1980
Creator: Patton, H. J.
Partner: UNT Libraries Government Documents Department
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Geothermal reservoir assessment case study: Northern Dixie Valley, Nevada

Description: Two 1500 foot temperature gradient holes and two deep exploratory wells were drilled and tested. Hydrologic-hydrochemical, shallow temperature survey, structural-tectonic, petrologic alteration, and solid-sample geochemistry studies were completed. Eighteen miles of high resolution reflection seismic data were gathered over the area. The study indicates that a geothermal regime with temperatures greater than 400/sup 0/F may exist at a depth of approximately 7500' to 10,000' over an area more th… more
Date: November 1980
Creator: Denton, Jere M.; Bell, Elaine J. & Jodry, Richard L.
Partner: UNT Libraries Government Documents Department
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IGPP-LLNL 1998 annual report

Description: The Institute of Geophysics and Planetary Physics (IGPP) is a Multicampus Research Unit of the University of California (UC). IGPP was founded in 1946 at UC Los Angeles with a charter to further research in the earth and planetary sciences and related fields. The Institute now has branches at UC campuses in Los Angeles, San Diego, and Riverside, and at Los Alamos and Lawrence Livermore national laboratories. The University-wide IGPP has played an important role in establishing interdisciplinary… more
Date: November 19, 1999
Creator: Ryerson, Frederick J.; Cook, Kem H. & Tweed, Jan
Partner: UNT Libraries Government Documents Department
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Bulletin of the Seismological Laboratory, January 1, 1975-December 31, 1979

Description: The determination of epicenters for earthquakes located in the western Great Basin, Nevada and eastern California, for the period 1975 to 1979 is summarized. The Laboratory attempts to identify and locate all earthquakes with M/sub L/ greater than about 2.5 in this region.
Date: November 1, 1980
Creator: Smith, G M & Ryall, F D
Partner: UNT Libraries Government Documents Department
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Seismic Exploration for Shallow Magma Bodies in the Vicinity of Socorro, New Mexico. (Final Report: 1/1/77 - 12/31/77)

Description: This report contains the following articles: Characteristics of Rio Grande rift in vicinity of Socorro, New Mexico, from geophysical studies; Exploration framework of the Socorro Geothermal Area, New Mexico; a study of Poisson's ratio in the upper crust in the Socorro, New Mexico, Area; and Microearthquake frequency attenuation of S phases in the Rio Grande rift near Socorro. (ACR)
Date: November 1, 1980
Creator: Sanford, Allan R. & Schlue, John
Partner: UNT Libraries Government Documents Department
open access

Lithospheric processes

Description: This is the final report of a three-year, Laboratory Directed Research and Development (LDRD) project at the Los Alamos National Laboratory (LANL). The main objective was to improve understanding of the origin and evolution of the Earth`s lithosphere by studying selected processes, such as deformation and magmatic intrusion during crustal extension, formation and extraction of mantle melts, fluid transport of heat and mass, and surface processes that respond to deep-seated events. Additional ob… more
Date: November 1, 1997
Creator: Baldridge, W. S.; Wohletz, K. & Fehler, M. C.
Partner: UNT Libraries Government Documents Department
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Bedrock geologic map of the Yucca Mountain area, Nye County, Nevada

Description: Yucca Mountain, Nye County, Nevada, has been identified as a potential site for underground storage of high-level radioactive nuclear waste. Detailed bedrock geologic maps form an integral part of the site characterization program by providing the fundamental framework for research into the geologic hazards and hydrologic behavior of the mountain. This bedrock geologic map provides the geologic framework and structural setting for the area in and adjacent to the site of the potential repository… more
Date: November 1, 1998
Creator: Day, W. C.; Potter, C. J.; Sweetkind, D. S.; Fridrich, C. J.; Dickerson, R. P.; San Juan, C. A. et al.
Partner: UNT Libraries Government Documents Department
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Bedrock geologic map of the central block area, Yucca Mountain, Nye County, Nevada

Description: Bedrock geologic maps form the foundation for investigations that characterize and assess the viability of the potential high-level radioactive waste repository at Yucca Mountain, Nevada. This study was funded by the US Department of Energy Yucca Mountain Project to provide a detailed (1:6,000-scale) bedrock geologic map for the area within and adjacent to the potential repository area at Yucca Mountain, Nye County, Nevada. Prior to this study, the 1:12,000-scale map of Scott and Bon, (1984) wa… more
Date: November 1, 1998
Creator: Day, W. C.; Potter, C. J.; Sweetkind, D. S.; Dickerson, R. P. & San Juan, C. A.
Partner: UNT Libraries Government Documents Department
open access

Status report of propagation models: Middle East and North Africa (S5.3)

Description: An improved understanding of the influence that tectonic structure has on regional seismic phases is needed to improve the current performance of regional discriminants and their transportability to the Middle East and North Africa. In the case that the crustal structure can be approximated by a flat layered laterally invariant medium, layer-cake reflectivity modeling can be used to obtain an accurate representation of regional phases. However, a laterally heterogeneous crust is just as common … more
Date: November 1, 1995
Creator: Schultz, C. A.; Patton, H. J. & Goldstein, P.
Partner: UNT Libraries Government Documents Department
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Unpublished letter from US Geological Survey Scientists to the editor of the New York Times Magazine regarding William J. Broads` November 18, 1990 article on Yucca Mountain

Description: This letter documents objections of a group of US Geological Survey Scientists to an article appearing November 18, 1990 in New York Times Magazine. The article was written by William J. Broad and dealt with a hypothesis of Jerry S. Szymanski. The letter addressed areas of concern; including hydrology, geology, tectonics, and the integrity of the scientists and their conclusions. (SM)
Date: November 28, 1990
Creator: Dudley, W. W. Jr.; Buono, A.; Carr, M. D.; Downey, J. S.; Ervin, E. M.; Fox, K. F. Jr. et al.
Partner: UNT Libraries Government Documents Department
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BASIN ANALYSIS AND PETROLEUM SYSTEM CHARACTERIZATION AND MODELING, INTERIOR SALT BASINS, CENTRAL AND EASTERN GULF OF MEXICO

Description: The principal research effort for Year 1 of the project is data compilation and the determination of the tectonic and depositional histories of the North Louisiana Salt Basin. In the first three (3) to six (6) months of Year 1, the research focus is on data compilation and the remainder of the year the emphasis is on the tectonic and depositional histories of the basin. No major problems have been encountered to date, and the project is on schedule.
Date: November 11, 2003
Creator: Mancini, Ernest A.
Partner: UNT Libraries Government Documents Department
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