Biot inversion for in-situ velocity and attenuation data A case study in Hawaii, USA

TAO Chun-hui; BAFFI S; WILKENS R H; FU S S; RICHARDSON M D; JIN Xiang-long

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TAO Chun-hui, BAFFI S, WILKENS R H, FU S S, RICHARDSON M D, JIN Xiang-long. Biot inversion for in-situ velocity and attenuation data A case study in Hawaii, USA[J]. Haiyang Xuebao, 2005, 27(3): 80-84.

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TAO Chun-hui, BAFFI S, WILKENS R H, FU S S, RICHARDSON M D, JIN Xiang-long. Biot inversion for in-situ velocity and attenuation data A case study in Hawaii, USA[J]. Haiyang Xuebao, 2005, 27(3): 80-84.

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Biot inversion for in-situ velocity and attenuation data A case study in Hawaii, USA

1.
Geoscience Department, Zhejiang University, Hangzhou 310014;Key Laboratory of Submarine Geosciences of State Oceanic Administration, Hangzhou 310012, China
2.
School of Ocean and Earth Science and Technology, University of Hawaii, Honolulu HI 96822, USA
3.
Marine Geosciences Division, Naval Research Laboratory, Stennis Space Center, MS 39529, USA
4.
Key Laboratory of Submarine Geosciences of State Oceanic Administration, Hangzhou 310012, China

Received Date: 2003-05-26
Rev Recd Date: 2004-03-12

Abstract

Abstract

In situ compressional wave velocity and attenuation measurements were made at 2 carbonate sediment sites over a frequency interval between 20 and 100 kHz.Velocity dispersion,while slight,appears in the data.Velocities increase from 1691 to 1708 m/s at Site H3 and from 1579 to 1585 m/s at Site H4 as the frequency increased.Effective at tenuation ranges from 15 to 75 dB/m at Site H3 and from 22 to 62 dB/m at Site H4.Parameters determined by core analysis were fixed in Biot-Stoll models and inversion of velocity and at tenuation data was used to evaluate the 6 unmeasurable parameters.It is found that Site H3 (porosity is 44%) has lower tortuosity,higher permeability and average pore radius than Site H4 (porosity is 56%) after inversion.Good fits were achieved for both velocity datasets,but corresponding modeled attenuation is low.An increase in the low frequency logarithmic decrement well above Stoll's recommended values allowed fits to both velocity and attenuation very well.
- Biot inversion,
- in-situ measurement,
- velocity,
- attenuation

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References(18)

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