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Title: Seismic characterization of fracture properties

Seismic characterization of fracture properties The purpose of this paper is to show that there is a relationship, both empirical and theoretical, between the measured seismic response, the mechanical stiffness (also referred to as specific stiffness) of fractures and their hydraulic conductivity. Laboratory measurements of the mechanical stiffness, hydraulic conductivity and seismic properties of natural fractures are summarized. A theoretical model for the amplitude and group time delay for compressional and shear waves transmitted across a single fracture is presented. Predictions based on this model are compared with laboratory measurements. Finally, the results for a single fracture are extended to multiple parallel fractures. 13 refs., 6 figs.
Authors: ; ; ;
Publication Date:
OSTI Identifier:OSTI ID: 7260125
Report Number(s):LBL-28333; CONF-900406--36
ON: DE90007759; TRN: 90-008036
DOE Contract Number:AC03-76SF00098
Resource Type:Conference
Resource Relation:Conference: International conference for high-level radioactive waste management, Las Vegas, NV (USA), 8-12 Apr 1990
Research Org:Lawrence Berkeley Lab., CA (USA)
Sponsoring Org:DOE/ER; DOE/RW
Country of Publication:United States
Language:English
Subject: 12 MANAGEMENT OF RADIOACTIVE AND NON-RADIOACTIVE WASTES FROM NUCLEAR FACILITIES; 58 GEOSCIENCES; GEOLOGIC FRACTURES; MATHEMATICAL MODELS; PHYSICAL PROPERTIES; HIGH-LEVEL RADIOACTIVE WASTES; UNDERGROUND DISPOSAL; HYDRAULIC CONDUCTIVITY; CORRELATIONS; MECHANICAL PROPERTIES; SEISMIC EFFECTS; AMPLITUDES; CLOSURES; EXPERIMENTAL DATA; FLUID FLOW; SITE CHARACTERIZATION; STRESSES; THEORETICAL DATA; DATA; GEOLOGIC STRUCTURES; INFORMATION; MANAGEMENT; MATERIALS; NUMERICAL DATA; RADIOACTIVE MATERIALS; RADIOACTIVE WASTES; WASTE DISPOSAL; WASTE MANAGEMENT; WASTES 052002* -- Nuclear Fuels-- Waste Disposal & Storage; 580000 -- Geosciences