Low-frequency asymptotic analysis of seismic reflection from afluid-saturated medium

Journal Article · Wed Apr 14 04:00:00 EDT 2004 · Transport in Porous Media

OSTI ID:929075

Silin, D B; Korneev, V A; Goloshubin, G M; Patzek, T W

Reflection of a seismic wave from a plane interface betweentwo elastic media does not depend on the frequency. If one of the mediais poroelastic and fluid-saturated, then the reflection becomesfrequency-dependent. This paper presents a low-frequency asymptoticformula for the reflection of seismic plane p-wave from a fluid-saturatedporous medium. The obtained asymptotic scaling of the frequency-dependentcomponent of the reflection coefficient shows that it is asymptoticallyproportional to the square root of the product of the reservoir fluidmobility and the frequency of the signal. The dependence of this scalingon the dynamic Darcy's law relaxation time is investigated as well.Derivation of the main equations of the theory of poroelasticity from thedynamic filtration theory reveals that this relaxation time isproportional to Biot's tortuosity parameter.

• Research Organization: Ernest Orlando Lawrence Berkeley NationalLaboratory, Berkeley, CA (US)
• Sponsoring Organization: USDOE Director, Office of Science
• DOE Contract Number: AC02-05CH11231
• OSTI ID: 929075
• Report Number(s): LBNL--54955; BnR: YN0100000
• Journal Information: Transport in Porous Media, Journal Name: Transport in Porous Media Journal Issue: 3 Vol. 62; ISSN TPMEEI
• Country of Publication: United States
• Language: English

Related Subjects

58 GEOSCIENCES
FILTRATION
REFLECTION
RELAXATION TIME
RESERVOIR FLUIDS
SEISMIC WAVES