Detection Of Subsurface Fractures And Permeable Zones By The Analysis Of Tube Waves
Name
1983.10 Beydoun et al.pdf
Size
500 KB
Format
Adobe PDF
Checksum (MD5)
44f79d947fe02ddcb7811353e3b6e138
Author(s)
Beydoun, W. B.
Cheng, C. H.
Toksoz, M. N.
Date Issued
1983
Publisher
Massachusetts Institute of Technology. Earth Resources Laboratory
Series/Report no.
Earth Resources Laboratory Industry Consortia Annual Report;1983-10
Abstract
In Vertical Seismic Profiling tube waves are generated by compressional
waves impinging on subsurface fractures or permeable zones. The amplitude of
tube waves is dependent upon the formation permeability, the length of the
fracture, and on the source frequency. The generation of tube waves is
formulated theoretically and the relative effects of these parameters are
studied individually. Field examples are shown for open fractures in granite.
From tube wave amplitudes normalized to P-wave amplitudes, calculated
permeabilities are on the order of 400 millidarcys.
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