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Title: Characterization of fracture networks for fluid flow analysis

Abstract

The analysis of fluid flow through fractured rocks is difficult because the only way to assign hydraulic parameters to fractures is to perform hydraulic tests. However, the interpretation of such tests, or ''inversion'' of the data, requires at least that we know the geometric pattern formed by the fractures. Combining a statistical approach with geophysical data may be extremely helpful in defining the fracture geometry. Cross-hole geophysics, either seismic or radar, can provide tomograms which are pixel maps of the velocity or attenuation anomalies in the rock. These anomalies are often due to fracture zones. Therefore, tomograms can be used to identify fracture zones and provide information about the structure within the fracture zones. This structural information can be used as the basis for simulating the degree of fracturing within the zones. Well tests can then be used to further refine the model. Because the fracture network is only partially connected, the resulting geometry of the flow paths may have fractal properties. We are studying the behavior of well tests under such geometry. Through understanding of this behavior, it may be possible to use inverse techniques to refine the a priori assignment of fractures and their conductances such that wemore » obtain the best fit to a series of well test results simultaneously. The methodology described here is under development and currently being applied to several field sites. 4 refs., 14 figs.« less

Authors:
; ; ; ; ; ; ; ;
Publication Date:
Research Org.:
Lawrence Berkeley Lab., CA (USA)
OSTI Identifier:
6200769
Report Number(s):
LBL-26868; CONF-8806169-3
ON: DE89013423
DOE Contract Number:  
AC03-76SF00098
Resource Type:
Conference
Resource Relation:
Conference: 4. annual Canadian/American conference on hydrogeology, Banff, Canada, 22 Jun 1988; Other Information: Portions of this document are illegible in microfiche products
Country of Publication:
United States
Language:
English
Subject:
58 GEOSCIENCES; FLUID FLOW; FRACTURE MECHANICS; DATA ANALYSIS; FLOW MODELS; FRACTURES; GEOPHYSICAL SURVEYS; HYDRAULICS; ROCK MECHANICS; WELL LOGGING; FAILURES; FLUID MECHANICS; MATHEMATICAL MODELS; MECHANICS; SURVEYS; 580300* - Mineralogy, Petrology, & Rock Mechanics- (-1989); 580100 - Geology & Hydrology- (-1989)

Citation Formats

Long, J C.S., Billaux, D, Hestir, K, Majer, E L, Peterson, J, Karasaki, K, Nihei, K, Gentier, S, and Cox, L. Characterization of fracture networks for fluid flow analysis. United States: N. p., 1989. Web.
Long, J C.S., Billaux, D, Hestir, K, Majer, E L, Peterson, J, Karasaki, K, Nihei, K, Gentier, S, & Cox, L. Characterization of fracture networks for fluid flow analysis. United States.
Long, J C.S., Billaux, D, Hestir, K, Majer, E L, Peterson, J, Karasaki, K, Nihei, K, Gentier, S, and Cox, L. 1989. "Characterization of fracture networks for fluid flow analysis". United States. https://www.osti.gov/servlets/purl/6200769.
@article{osti_6200769,
title = {Characterization of fracture networks for fluid flow analysis},
author = {Long, J C.S. and Billaux, D and Hestir, K and Majer, E L and Peterson, J and Karasaki, K and Nihei, K and Gentier, S and Cox, L},
abstractNote = {The analysis of fluid flow through fractured rocks is difficult because the only way to assign hydraulic parameters to fractures is to perform hydraulic tests. However, the interpretation of such tests, or ''inversion'' of the data, requires at least that we know the geometric pattern formed by the fractures. Combining a statistical approach with geophysical data may be extremely helpful in defining the fracture geometry. Cross-hole geophysics, either seismic or radar, can provide tomograms which are pixel maps of the velocity or attenuation anomalies in the rock. These anomalies are often due to fracture zones. Therefore, tomograms can be used to identify fracture zones and provide information about the structure within the fracture zones. This structural information can be used as the basis for simulating the degree of fracturing within the zones. Well tests can then be used to further refine the model. Because the fracture network is only partially connected, the resulting geometry of the flow paths may have fractal properties. We are studying the behavior of well tests under such geometry. Through understanding of this behavior, it may be possible to use inverse techniques to refine the a priori assignment of fractures and their conductances such that we obtain the best fit to a series of well test results simultaneously. The methodology described here is under development and currently being applied to several field sites. 4 refs., 14 figs.},
doi = {},
url = {https://www.osti.gov/biblio/6200769}, journal = {},
number = ,
volume = ,
place = {United States},
year = {Thu Jun 01 00:00:00 EDT 1989},
month = {Thu Jun 01 00:00:00 EDT 1989}
}

Conference:
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