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Improved characterization through joint hydrogeophysical inversion: Examples of three different approaches

Description: With the increasing application of geophysical methods to hydrogeological problems, approaches for obtaining quantitative estimates of hydrogeological parameters using geophysical data are in great demand. A common approach to hydrogeological parameter estimation using geophysical and hydrogeological data is to first invert the geophysical data using a geophysical inversion procedure, and subsequently use the resulting estimates together with available hydrogeological information to estimate a … more
Date: July 1, 2004
Creator: Linde, Niklas; Chen, Jinsong; Kowalsky, Michael; Finsterle,Stefan; Rubin, Yoram & Hubbard, Susan
Partner: UNT Libraries Government Documents Department
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Results of Electrical Resistivity and Electrical Induction Measurements at Abana Mine, Quebec, Canada: Explanation of Some Factors Associated with Induction Method

Description: Technical paper issued by the Bureau of Mines over studies conducted on electrical resistivity at the Abana Mine in Quebec. The methods used, and results of the studies are discussed. This paper includes tables, maps, and illustrations.
Date: 1931
Creator: Potter, E. Vernon & Lee, F. W.
Partner: UNT Libraries Government Documents Department
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Regional characterization of Western China

Description: Geological, geophysical, and seismic data are being assembled and organized into a knowledge base for Western China as part of the CTBT Research and Development regional characterization effort. We have begun our analysis using data from the station WMQ of the Chinese Digital Seismic Network (CDSN). Regional seismograms are being analyzed to construct travel time curves, velocity models, attenuation characteristics, and to quantify regional propagation effects such as phase blockages. Using loc… more
Date: September 1, 1995
Creator: Randall, G. E.; Weaver, T. A.; Hartse, H. E.; Taylor, S. R.; Warren, R. G. & Cogbill, A. H.
Partner: UNT Libraries Government Documents Department
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Post-Injection Geophysical Evaluation of the Winding Ridge Site CRADA 98-F012, Final Report

Description: Acid mine drainage (AMD) from underground mines is a major environmental problem. The disposal of coal combustion by-products (CCB) is also a major national problem due to the large volumes produced annually and the economics associated with transportation and environmentally safe disposal. The concept of returning large volumes of the CCB to their point of origin, underground mines, and using the typically alkaline and pozzolanic attributes of the waste material for the remediation of AMD has … more
Date: September 16, 1998
Creator: Lyons, Connie; Current, Richard & Ackman, Terry
Partner: UNT Libraries Government Documents Department
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Structural Model of the Basement in the Central Savannah River Area, South Carolina and Georgia

Description: Interpretation of several generations of seismic reflection data and potential field data suggests the presence of several crustal blocks within the basement beneath the Coastal Plain in the Central Savannah River Area (CSRA). The seismic reflection and refraction data include a grid of profiles that capture shallow and deep reflection events and traverse the Savannah River Site and vicinity. Potential field data includes aeromagnetic, ground magnetic surveys, reconnaissance and detailed gravit… more
Date: March 1992
Creator: Stephenson, D. & Stieve, A.
Partner: UNT Libraries Government Documents Department
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Measuring and predicting reservoir heterogeneity in complex deposystems. The fluvial-deltaic Big Injun Sandstone in West Virginia. Final report, September 20, 1991--October 31, 1993

Description: Non-uniform composition and permeability of a reservoir, commonly referred to as reservoir heterogeneity, is recognized as a major factor in the efficient recovery of oil during primary production and enhanced recovery operations. Heterogeneities are present at various scales and are caused by various factors, including folding and faulting, fractures, diagenesis and depositional environments. Thus, a reservoir consists of a complex flow system, or series of flow systems, dependent on lithology… more
Date: May 1, 1994
Creator: Hohn, M. E.; Patchen, D. G.; Heald, M.; Aminian, K.; Donaldson, A.; Shumaker, R. et al.
Partner: UNT Libraries Government Documents Department
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1995 Area 1 bird survey/Zone 1, Operable Unit 2, Robins Air Force Base, Georgia

Description: Robins Air Force Base is located in Warner Robins, Georgia, approximately 90 miles southeast of Atlanta, Georgia. As part of the Baseline Investigation (CDM Federal 1994) a two day bird survey was conducted by M. C. Wade (Oak Ridge National Laboratory) and B.A. Beatty (CDM Federal Programs) in May 1995. The subject area of investigation includes the sludge lagoon, Landfill No. 4, and the wetland area east of the landfill and west of Hannah Road (including two ponds). This is known as Area 1. Th… more
Date: August 1, 1995
Creator: Wade, M.C.
Partner: UNT Libraries Government Documents Department
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Neural network identifications of spectral signatures

Description: We have investigated the application of neural nets to the determination of fundamental leaf canopy parameters from synthetic spectra. We describe some preliminary runs in which we separately determine leaf chemistry, leaf structure, leaf area index, and soil characteristics, and then we perform a simultaneous determination of all these parameters in a single neural network run with synthetic six-band Landsat data. We find that neural nets offer considerable promise in the determination of fund… more
Date: February 1, 1996
Creator: Gisler, G. & Borel, C.
Partner: UNT Libraries Government Documents Department
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Joint inversion of geophysical data for site characterization and restoration monitoring

Description: The purpose of this project is to develop a computer code for joint inversion of seismic and electrical data, to improve underground imaging for site characterization and remediation monitoring. The computer code developed in this project will invert geophysical data to obtain direct estimates of porosity and saturation underground, rather than inverting for seismic velocity and electrical resistivity or other geophysical properties. This is intended to be a significant improvement in the state… more
Date: May 28, 1998
Creator: Berge, P. A.
Partner: UNT Libraries Government Documents Department
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Geophysical Surveys of a Known Karst Feature, Oak Ridge Y-12 Plant, Oak Ridge, Tennessee

Description: Geophysical data were acquired at a site on the Oak Ridge Reservation, Tennessee to determine the characteristics of a mud-filled void and to evaluate the effectiveness of a suite of geophysical methods at the site. Methods that were used included microgravity, electrical resistivity, and seismic refraction. Both microgravity and resistivity were able to detect the void as well as overlying structural features. The seismic data provide bedrock depth control for the other two methods, and show o… more
Date: November 14, 1999
Creator: Carpenter, P.J.; Carr, B.J.; Doll, W.E.; Kaufmann, R.D. & Nyquist, J.E.
Partner: UNT Libraries Government Documents Department
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A Hydrologic-Geophysical Method for Characterizing Flow and Transport Processes within the Vadose Zone

Description: The objective of this study is to analyze flow within the vadose zone during a mid-scale hydrologic test to and to characterize transport processes in-situ. This project will employ numerical and experimental tools that have been developed under a previously funded EMSP proposal (project number 55332). Geophysical imaging techniques will be employed to image the changes produced by the transport experiments in-situ as they occur. Results will help to better understand flow and transport modes w… more
Date: June 1, 2000
Creator: Alumbaugh, David L. & Brainard, James R.
Partner: UNT Libraries Government Documents Department
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Environmental Geophysics at Kings Creek Disposal Site and 30th Street Landfill, Aberdeen Proving Ground, Maryland

Description: Geophysical studies on the Bush River Peninsula in the Edgewood Area of Aberdeen Proving Ground, Maryland, delineate landfill areas and provide diagnostic signatures of the hydrogeologic framework and possible contaminant pathways. These studies indicate that, during the Pleistocene Epoch, alternating stands of high and low seal levels resulted in a complex pattern of shallow channel-fill deposits in the Kings Creek area. Ground-penetrating radar studies reveal a paleochannel greater than 50 ft… more
Date: January 1, 1995
Creator: Davies, B. E.; Miller, S. F.; McGinnis, L. D.; Daudt, C. R.; Thompson, M. D.; Stefanov, J. E. et al.
Partner: UNT Libraries Government Documents Department
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Review of Geophysical Techniques to Define the Spatial Distribution of Subsurface Properties or Contaminants

Description: This is a letter report to Fluor Hanford, Inc. The purpose of this report is to summarize state-of-the-art, minimally intrusive geophysical techniques that can be used to clarify subsurface geology, structure, moisture, and chemical composition. The technology review focused on geophysical characterization techniques that provide two- or three-dimensional information about the spatial distribution of subsurface properties and/or contaminants.
Date: August 22, 2005
Creator: Murray, Christopher J.; Last, George V. & Truex, Michael J.
Partner: UNT Libraries Government Documents Department
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Corrective Action Investigation Plan for Corrective Action Unit 555: Septic Systems Nevada Test Site, Nevada, Rev. No.: 0 with Errata

Description: This Corrective Action Investigation Plan (CAIP) contains project-specific information including facility descriptions, environmental sample collection objectives, and criteria for conducting site investigation activities at Corrective Action Unit (CAU) 555: Septic Systems, Nevada Test Site (NTS), Nevada. This CAIP has been developed in accordance with the ''Federal Facility Agreement and Consent Order'' (FFACO) (1996) that was agreed to by the State of Nevada, the U.S. Department of Energy (DO… more
Date: December 1, 2005
Creator: Pastor, Laura
Partner: UNT Libraries Government Documents Department
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Crosshole EM for oil field characterization and EOR monitoring: Field examples

Description: Crosshole and surface-to-borehole electromagnetic (EM) imaging is applied to reservoir characterization and steam flood monitoring in a central California oil field. Steam was injected into three stacked, eastward-dipping, unconsolidated oil sands within the upper 200 in. The steam plume is expected to develop as an ellipse aligned with the regional northwest-southeast strike. EM measurements were made from two flberglass-cased observation wells straddling the steam injector on a northeast-sout… more
Date: September 1, 1994
Creator: Wilt, M.; Schenkel, C.; Torres-Verdin, C.; Lee, Ki Ha & Tseng, Hung-Wen
Partner: UNT Libraries Government Documents Department
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Improved Oil Recovery in Fluvial Dominated Deltaic Reservoirs of Kansas Near Term

Description: The objective of this project is to address waterflood problems of the type found in Morrow sandstone reservoirs in southwestern Kansas and Cherokee Group reservoirs in southeastern Kansas. Two demonstration sites operated by different independent oil operators are involved in this project. The Stewart Field is located in Finney County, Kansas and is operated by North American Resources Company. The Nelson Lease is located in Allen County, Kansas, in the N.E. Savonburg Field and is operated by … more
Date: April 15, 1997
Creator: Green, D.W.; Willhlte, C.P.; Walton, A.; Schoeling, L.; Reynolds, R.; Michnick, M. et al.
Partner: UNT Libraries Government Documents Department
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Case studies of geophysical search methods relevant to the continuation phase of an on-Site inspection

Description: Part II of the Protocol of the Comprehensive Test Ban Treaty prescribes the use of geophysical methods such as active seismic surveys and electrical conductivity measurements to search for and locate underground anomalies, including cavities and rubble zones, during the continuation phase of an on-site inspection. In this paper the application of spontaneous potential, magnetotelluric, active seismic, and gas sampling studies at the US Nevada Test Site associated with underground nuclear explos… more
Date: April 20, 1999
Creator: Sweeney, J. J.
Partner: UNT Libraries Government Documents Department
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Paleoclimatic Drilling at Washoe Lake, November 1991 to March 1993. Final report

Description: A lacustrine sediment sequence in Washoe Lake in western Nevada was drilled in 1992 for paleoclimatic and paleohydrologic studies. In late June, 1991, the lake completely dried up for the first time since 1933-34 and only the second time in recorded history, offering a rare opportunity to obtain long continuous sections from a quasi-permanent lake in a climatically sensitive region. The lake is nominally 31 km{sup 2} in size and averages 3-4 m in depth. During the Pleistocene, the water depth w… more
Date: December 1, 1998
Creator: Winkler, P.
Partner: UNT Libraries Government Documents Department
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Bibliography, geophysical data locations, and well core listings for the Mississippi Interior Salt Basin

Description: To date, comprehensive basin analysis and petroleum system modeling studies have not been performed on any of the basins in the northeastern Gulf of Mexico. Of these basins, the Mississippi Interior Salt Basin has been selected for study because it is the most petroliferous basin in the northeastern Gulf of Mexico, small- and medium-size companies are drilling the majority of the exploration wells. These companies do not have the resources to perform basin analysis or petroleum system modeling … more
Date: May 1, 1998
Partner: UNT Libraries Government Documents Department
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Gypsy Field project in reservoir characterization

Description: The overall objective of this project was to use extensive Gypsy Field Laboratory and data as a focus for developing and testing reservoir characterization methods that are targeted at improved recovery of conventional oil. This report describes progress since project report DOE/BC/14970-7 and covers the period June 1997-September 1998 and represents one year of funding originally allocated for the year 1996. During the course of the work previously performed, high resolution geophysical and ou… more
Date: January 12, 2000
Creator: Castagna, John P. & O'Meara, Daniel J., Jr.
Partner: UNT Libraries Government Documents Department
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