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Geophysical and transport properties of reservoir rocks. Final report for task 4: Measurements and analysis of seismic properties

Description: The principal objective of research on the seismic properties of reservoir rocks is to develop a basic understanding of the effects of rock microstructure and its contained pore fluids on seismic velocities and attenuation. Ultimately, this knowledge would be used to extract reservoir properties information such as the porosity, permeability, clay content, fluid saturation, and fluid type from borehole, cross-borehole, and surface seismic measurements to improve the planning and control of oil … more
Date: May 1, 1993
Creator: Cook, N. G. W.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Elastic-Wavefield Seismic Stratigraphy: A New Seismic Imaging Technology Progress Report

Description: The focus of elastic-wavefield seismic stratigraphy research shifted from onshore prospects to marine environments during this report period. Four-component ocean-bottom-cable (4-C OBC) seismic data acquired in water depths of 2400 to 2500 feet across Green Canyon Block 237 in the Gulf of Mexico were processed and analyzed. The P-P and P-SV images of strata immediately below the seafloor exhibit amazing differences in P-P and P-SV seismic facies. These data may be one of the classic examples of… more
Date: May 6, 2004
Creator: Hardage, Bob A.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Thermal and seismic impacts on the North Ramp at Yucca Mountain

Description: The impacts of thermal and seismic loads on the stability of the Exploratory Studies Facility North Ramp at Yucca Mountain were assessed using both empirical and analytical approaches. This paper presents the methods and results of the analyses. Thermal loads were first calculated using the computer code STRES3D. This code calculates the conductive heat transfer through a semi-infinite elastic, isotropic, homogeneous solid and the rafts thermally-induced stresses. The calculated thermal loads, … more
Date: May 1, 1994
Creator: Lin, M.; Hardy, M.P. & Jung, J.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Study effects of geopressured-geothermal subsurface environment on elastic properties of Texas Gulf Coast sandstones and shales using well logs, core data, and velocity surveys. Final report

Description: Relations between porosity and permeability for the Pleasant Bayou wells were determined from conventional core data. Porosities from the time average equations required compaction correction factors of 1.9 in hydropressured sandstones and 1.0 in geopressured sandstones. Best average prmeabilities in the geopressured zone were found in the primary production interval 14,687 to 14,716 ft (4477 to 4485 m). Average density gradients were 2.106 x 10/sup -3/ and 2.688 x 10/sup -3/ (gm/cm/sup 3/)/100… more
Date: May 1, 1980
Creator: Gregory, A. R.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Seismological investigations in geothermal regions

Description: Seismological methods, including studies of microearthquakes, P- and S-wave velocities and P-wave attenuation were investigated as tools for the exploration and delineation of geothermal resources. Seismograms from explosions and microearthquakes were examined for changes in frequency content and relative arrival times across a known geothermal area, The Geysers, California, and a potential geothermal region, Grass Valley, Nevada. Microearthquakes within the two regions were examined for eviden… more
Date: May 1, 1978
Creator: Majer, E. L.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Convolution-deconvolution in DIGES

Description: Convolution and deconvolution operations is by all means a very important aspect of SSI analysis since it influences the input to the seismic analysis. This paper documents some of the convolution/deconvolution procedures which have been implemented into the DIGES code. The 1-D propagation of shear and dilatational waves in typical layered configurations involving a stack of layers overlying a rock is treated by DIGES in a similar fashion to that of available codes, e.g. CARES, SHAKE. For certa… more
Date: May 1, 1995
Creator: Philippacopoulos, A.J. & Simos, N.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Application of seismic tomographic techniques in the investigation of geothermal systems

Description: The utility of microearthquake data for characterizing the Northwest Geysers geothermal field and the Long Valley Caldera (LVC) was investigated. Three-dimensional (3-D) P- and S-wave seismic velocity models were estimated for the Coldwater Creek Steam Field (CCSF) in the Northwest Geysers region. Hypocenters relocated using these 3-D models appear to be associated with the steam producing zone, with a deeper cluster of hypocenters beneath an active injection well. Spatial and temporal patterns… more
Date: May 1, 1995
Creator: Romero, A. E., Jr.
Item Type: Refine your search to only Thesis or Dissertation
Partner: UNT Libraries Government Documents Department
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