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 for September 2001 ...

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By ROBERT D. BENSON and THOMAS L. DAVIS
The Geophysical Corner is a regular column in the EXPLORER, edited by R. Randy Ray. This month's column is titled "Multi-Component, Time-Lapse Seismology for Monitoring Reservoir Production Processes."

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S-Waves Detect Reservoir Flows
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Figure 2
Figure 3
Figure 4

Figure 1.

Shear-wave polarization and splitting in a fractured material. As an S-wave with an arbitrary polarization direction enters an anisotropic material, the wave splits into S1 and S2 components with different polarizations and different velocities. The wave polarized parallel to the fractures travels faster and is less attenuated that the wave polarized perpendicular to the fractures. After the S-waves emerge from the anisotropic material, they continue to propagate as two S-waves with different polarization directions.

 for September 2001 ...

AAPG Home > EXPLORER > Geophysical Corner > S-Waves Detect Reservoir Flows > Figure 1 2 3 4