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Title: Frame moduli of unconsolidated sands and sandstones

Abstract

In this study, the authors investigate the elastic moduli of the empty grain framework (the frame moduli) in unconsolidated sands and consolidated sandstones. The work was done to improve the interpretation of seismic amplitude anomalies and amplitude variations with offset (AVO) associated with hydrocarbon reservoirs. They developed a laboratory apparatus to measure the frame Poisson's ratio and Young's modulus of unconsolidated sands at seismic frequencies (0.2 to 155 Hz) in samples approximately 11 cm long. They used ultrasonic pulse velocity measurements to measure the frame moduli of consolidated sandstones. They found that the correlation coefficient between the frame Poisson's ratio [sigma][sub A] and the mineral Poisson's ratio [sigma][sub M] is 0.84 in consolidated sandstones and only 0.28 in unconsolidated sands. The range of [sigma][sub A] values in unconsolidated sands is 0.115 to 0.237 (mean = 0.187, standard deviation = 0.030), and [sigma][sub A] cannot be estimated without core or log analyses. Frame moduli analyses of core samples can be used to calibrate the interpretation of seismic amplitude anomalies and AVO effects. For use in areas without core or log analyses, the authors developed an empirical relation that can be used to estimate [sigma][sub A] in unconsolidated sands and sandstones frommore » [sigma][sub M] and the frame P-wave modulus.« less

Authors:
; ;  [1]
  1. Chevron Petroleum Technology Co., La Habra, CA (United States)
Publication Date:
OSTI Identifier:
6782687
Resource Type:
Journal Article
Journal Name:
Geophysics; (United States)
Additional Journal Information:
Journal Volume: 59:9; Journal ID: ISSN 0016-8033
Country of Publication:
United States
Language:
English
Subject:
02 PETROLEUM; 03 NATURAL GAS; 58 GEOSCIENCES; NATURAL GAS DEPOSITS; SEISMIC SURVEYS; PETROLEUM DEPOSITS; RESERVOIR ROCK; ELASTICITY; DATA ANALYSIS; GEOLOGIC DEPOSITS; GEOPHYSICAL SURVEYS; MECHANICAL PROPERTIES; MINERAL RESOURCES; RESOURCES; SURVEYS; TENSILE PROPERTIES; 020200* - Petroleum- Reserves, Geology, & Exploration; 030200 - Natural Gas- Reserves, Geology, & Exploration; 580000 - Geosciences

Citation Formats

Spencer, Jr, J W, Cates, M E, and Thompson, D D. Frame moduli of unconsolidated sands and sandstones. United States: N. p., 1994. Web. doi:10.1190/1.1443694.
Spencer, Jr, J W, Cates, M E, & Thompson, D D. Frame moduli of unconsolidated sands and sandstones. United States. https://doi.org/10.1190/1.1443694
Spencer, Jr, J W, Cates, M E, and Thompson, D D. Thu . "Frame moduli of unconsolidated sands and sandstones". United States. https://doi.org/10.1190/1.1443694.
@article{osti_6782687,
title = {Frame moduli of unconsolidated sands and sandstones},
author = {Spencer, Jr, J W and Cates, M E and Thompson, D D},
abstractNote = {In this study, the authors investigate the elastic moduli of the empty grain framework (the frame moduli) in unconsolidated sands and consolidated sandstones. The work was done to improve the interpretation of seismic amplitude anomalies and amplitude variations with offset (AVO) associated with hydrocarbon reservoirs. They developed a laboratory apparatus to measure the frame Poisson's ratio and Young's modulus of unconsolidated sands at seismic frequencies (0.2 to 155 Hz) in samples approximately 11 cm long. They used ultrasonic pulse velocity measurements to measure the frame moduli of consolidated sandstones. They found that the correlation coefficient between the frame Poisson's ratio [sigma][sub A] and the mineral Poisson's ratio [sigma][sub M] is 0.84 in consolidated sandstones and only 0.28 in unconsolidated sands. The range of [sigma][sub A] values in unconsolidated sands is 0.115 to 0.237 (mean = 0.187, standard deviation = 0.030), and [sigma][sub A] cannot be estimated without core or log analyses. Frame moduli analyses of core samples can be used to calibrate the interpretation of seismic amplitude anomalies and AVO effects. For use in areas without core or log analyses, the authors developed an empirical relation that can be used to estimate [sigma][sub A] in unconsolidated sands and sandstones from [sigma][sub M] and the frame P-wave modulus.},
doi = {10.1190/1.1443694},
url = {https://www.osti.gov/biblio/6782687}, journal = {Geophysics; (United States)},
issn = {0016-8033},
number = ,
volume = 59:9,
place = {United States},
year = {1994},
month = {9}
}