Fracture Characterization From Attenuation And Generation Of Tube Waves
Name
1986.11 Hardin et al.pdf
Size
1.31 MB
Format
Adobe PDF
Checksum (MD5)
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Author(s)
Hardin, E. L.
Cheng, C. H.
Paillet, F. L.
Mendelson, J. D.
Date Issued
1986
Publisher
Massachusetts Institute of Technology. Earth Resources Laboratory
Series/Report no.
Earth Resources Laboratory Industry Consortia Annual Report;1986-11
Abstract
Results are presented from experiments carried out in conjunction with the USGS at
the Hubbard Brook Experimental Forest near Mirror Lake, New Hampshire. The study
focuses on our ability to obtain orientation and transmissivity estimates of naturally
occuring fractures. The collected dataset includes a four-offset hydrophone vertical
seismic profile, full waveform acoustic logs at 5, 15 and 35 kHz, borehole televiewer,
temperature, resistivity, and SP logs, and well-to-well pu,mp test data. While the basic
assumptions of the VSP generation model are found to be tenable, fracture aperture
estimates from VSP were generally one order of magnitude lower than corresponding
pump test or Stoneley wave attenuation results. A new model for tube wave generation
which makes use of fracture stiffnes (stress/length) is presented.
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