Crosswell seismic measurement of transverse isotropy in V/sub p/ and Q/sup p/

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Crosswell seismic measurements of apparent seismic Q/sub p/, V/sub p/, and V/sub s/ were made at the DOE Multi-Well Experiment (MWX) site near Rifle, Colorado. The MWX wells penetrate gas-bearing low permeability sandstones in the Mesa Verde formation at depths between 1950-2010 meters. Numerous measurements of Q/sub p/ were made between angles of 45 and 135 degrees measured from vertical using a modification of the technique of Fehler and Pearson (1984) in which measurement of P-wave amplitude permits the calculation of Q/sub p/, once compensation has been made for the radiation pattern of the source and geometric spreading. The magnitude ... continued below

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Pages: 13

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Johnson, P.A.; Albright, J.N. & Phillips, W.S. January 1, 1986.

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Description

Crosswell seismic measurements of apparent seismic Q/sub p/, V/sub p/, and V/sub s/ were made at the DOE Multi-Well Experiment (MWX) site near Rifle, Colorado. The MWX wells penetrate gas-bearing low permeability sandstones in the Mesa Verde formation at depths between 1950-2010 meters. Numerous measurements of Q/sub p/ were made between angles of 45 and 135 degrees measured from vertical using a modification of the technique of Fehler and Pearson (1984) in which measurement of P-wave amplitude permits the calculation of Q/sub p/, once compensation has been made for the radiation pattern of the source and geometric spreading. The magnitude of Q/sub p/ and V/sub p/ are found to change with propagation angle. Minimum values of Q/sub p/ and maximum values of V/sub p/ were measured parallel to sedimentary layering (15 and 4.75 km/s, respectively). A roughly linear increase in Q/sub p/ and a decrease in V/sub p/ occurs with increasing inclination of propagation paths to horizontal bedding planes. At 50 degrees from vertical a 90 percent increase in Q/sub p/ and a 7 percent decrease in V/sub p/ relative to values in the horizontal direction were measured. No change in V/sub s/ was observed. 12 refs., 3 figs., 1 tab.

Physical Description

Pages: 13

Notes

NTIS, PC A02/MF A01; 1.

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  • 56. annual international meeting and expo of the Society of Exploration Geophysicists, Houston, TX, USA, 2 Nov 1986

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  • Other: DE86010166
  • Report No.: LA-UR-86-1160
  • Report No.: CONF-861108-3
  • Grant Number: W-7405-ENG-36
  • Office of Scientific & Technical Information Report Number: 5211856
  • Archival Resource Key: ark:/67531/metadc1060328

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Office of Scientific & Technical Information Technical Reports

Reports, articles and other documents harvested from the Office of Scientific and Technical Information.

Office of Scientific and Technical Information (OSTI) is the Department of Energy (DOE) office that collects, preserves, and disseminates DOE-sponsored research and development (R&D) results that are the outcomes of R&D projects or other funded activities at DOE labs and facilities nationwide and grantees at universities and other institutions.

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  • January 1, 1986

Added to The UNT Digital Library

  • Jan. 22, 2018, 7:23 a.m.

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  • Feb. 1, 2018, 7:02 p.m.

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Johnson, P.A.; Albright, J.N. & Phillips, W.S. Crosswell seismic measurement of transverse isotropy in V/sub p/ and Q/sup p/, article, January 1, 1986; New Mexico. (digital.library.unt.edu/ark:/67531/metadc1060328/: accessed November 13, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.