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

Abstract

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 and gas recovery. This thesis presents laboratory ultrasonic measurements for three granular materials and attempts to relate the microstructural properties and the properties of the pore fluids to P- and S-wave velocities and attenuation. These experimental results show that artificial porous materials with sintered grains and a sandstone with partially cemented grains exhibit complexities in P- and S-wave attenuation that cannot be adequately explained by existing micromechanical theories. It is likely that some of the complexity observed in the seismic attenuation is controlled by details of the rock microstructure, such as the grain contact area and grain shape, and by the arrangement of the grain packing. To examine these effects, a numerical method was developed for analyzing wave propagation in a grain packing. The method is based onmore » a dynamic boundary integral equation and incorporates generalized stiffness boundary conditions between individual grains to account for viscous losses and grain contact scattering.« less

Authors:
Publication Date:
Research Org.:
California Univ., Berkeley, CA (United States)
Sponsoring Org.:
USDOE, Washington, DC (United States)
OSTI Identifier:
10159675
Report Number(s):
DOE/BC/14475-12
ON: DE93000139
DOE Contract Number:
AC22-89BC14475
Resource Type:
Technical Report
Resource Relation:
Other Information: PBD: May 1993
Country of Publication:
United States
Language:
English
Subject:
02 PETROLEUM; RESERVOIR ROCK; WAVE PROPAGATION; SANDSTONES; MATHEMATICAL MODELS; SEISMIC P WAVES; SEISMIC S WAVES; ULTRASONIC WAVES; PROGRESS REPORT; FLUID FLOW; HETEROGENEOUS EFFECTS; RESERVOIR ENGINEERING; INTEGRAL EQUATIONS; BOUNDARY CONDITIONS; VELOCITY; ATTENUATION; BENCH-SCALE EXPERIMENTS; GRANULAR MATERIALS; POROUS MATERIALS; FORECASTING; EXPERIMENTAL DATA; MICROSTRUCTURE; GLASS; 020200; 020300; RESERVES, GEOLOGY, AND EXPLORATION; DRILLING AND PRODUCTION

Citation Formats

Cook, N.G.W.. Geophysical and transport properties of reservoir rocks. Final report for task 4: Measurements and analysis of seismic properties. United States: N. p., 1993. Web. doi:10.2172/10159675.
Cook, N.G.W.. Geophysical and transport properties of reservoir rocks. Final report for task 4: Measurements and analysis of seismic properties. United States. doi:10.2172/10159675.
Cook, N.G.W.. Sat . "Geophysical and transport properties of reservoir rocks. Final report for task 4: Measurements and analysis of seismic properties". United States. doi:10.2172/10159675. https://www.osti.gov/servlets/purl/10159675.
@article{osti_10159675,
title = {Geophysical and transport properties of reservoir rocks. Final report for task 4: Measurements and analysis of seismic properties},
author = {Cook, N.G.W.},
abstractNote = {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 and gas recovery. This thesis presents laboratory ultrasonic measurements for three granular materials and attempts to relate the microstructural properties and the properties of the pore fluids to P- and S-wave velocities and attenuation. These experimental results show that artificial porous materials with sintered grains and a sandstone with partially cemented grains exhibit complexities in P- and S-wave attenuation that cannot be adequately explained by existing micromechanical theories. It is likely that some of the complexity observed in the seismic attenuation is controlled by details of the rock microstructure, such as the grain contact area and grain shape, and by the arrangement of the grain packing. To examine these effects, a numerical method was developed for analyzing wave propagation in a grain packing. The method is based on a dynamic boundary integral equation and incorporates generalized stiffness boundary conditions between individual grains to account for viscous losses and grain contact scattering.},
doi = {10.2172/10159675},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Sat May 01 00:00:00 EDT 1993},
month = {Sat May 01 00:00:00 EDT 1993}
}

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