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Title: Low-frequency fluid waves in fractures and pipes

Low-frequency analytical solutions have been obtained for phase velocities of symmetrical fluid waves within both an infinite fracture and a pipe filled with a viscous fluid. Three different fluid wave regimes can exist in such objects, depending on the various combinations of parameters, such as fluid density, fluid viscosity, walls shear modulus, channel thickness, and frequency. Equations for velocities of all these regimes have explicit forms and are verified by comparisons with the exact solutions. The dominant role of fractures in rock permeability at field scales and the strong amplitude and frequency effects of Stoneley guided waves suggest the importance of including these wave effects into poroelastic theories.
Authors:
Publication Date:
OSTI Identifier:
1017065
Report Number(s):
LBNL-4615E
Journal ID: ISSN 0016-8033; TRN: US201112%%533
DOE Contract Number:
DE-AC02-05CH11231
Resource Type:
Journal Article
Resource Relation:
Journal Name: Geophysics; Journal Volume: 75; Journal Issue: 6; Related Information: Journal Publication Date: 2010
Research Org:
Ernest Orlando Lawrence Berkeley National Laboratory, Berkeley, CA (US)
Sponsoring Org:
Earth Sciences Division
Country of Publication:
United States
Language:
English
Subject:
54; 58; AMPLITUDES; ANALYTICAL SOLUTION; EXACT SOLUTIONS; FRACTURES; PERMEABILITY; SHEAR; THICKNESS; VISCOSITY