SEISMIC ATTENUATION FOR RESERVOIR CHARACTERIZATION | Zendy

Joel Walls | Zendy; M. Turhan Taner | Zendy; Gary Mavko | Zendy; Jack Dvorkin | Zendy

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SEISMIC ATTENUATION FOR RESERVOIR CHARACTERIZATION

Author(s) -

Joel Walls,

M. Turhan Taner,

Gary Mavko,

Jack Dvorkin

Publication year - 2002

Publication title -

osti oai (u.s. department of energy office of scientific and technical information)

Language(s) - English

Resource type - Reports

DOI - 10.2172/834454

Subject(s) - attenuation , saturation (graph theory) , anelastic attenuation factor , bulk modulus , modulus , geology , mechanics , mineralogy , materials science , physics , optics , composite material , mathematics , combinatorics

Wave-induced variations of pore pressure in a partially-saturated reservoir result in oscillatory liquid flow. The viscous losses during this flow are responsible for wave attenuation. The same viscous effects determine the changes in the dynamic bulk modulus of the system versus frequency. These changes are necessarily linked to attenuation via the causality condition. We analytically quantify the frequency dependence of the bulk modulus of a partially saturated rock by assuming that saturation is patchy and then link these changes to the inverse quality factor. As a result, the P-wave attenuation is quantitatively linked to saturation and thus can serve as a saturation indicator

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