Squirt flow influence on sonic log parameters

被引:16
作者
Markova, I. [1 ]
Ronquillo Jarillo, G. [1 ]
Markov, M. [1 ]
Gurevich, B. [2 ]
机构
[1] Mexican Oil Inst, Mexico City 07730, DF, Mexico
[2] Curtin Univ Technol, Dept Explorat Geophys, Perth, WA 6845, Australia
关键词
Downhole methods; Body waves; Guided waves; Acoustic properties; WAVE-PROPAGATION; BOREHOLE; MEDIA; ATTENUATION; DISPERSION; ROCKS;
D O I
10.1093/gji/ggt442
中图分类号
P3 [地球物理学]; P59 [地球化学];
学科分类号
0708 ; 070902 ;
摘要
Most sedimentary rocks contain movable fluid in the pores. Hydrodynamic effects due to wave-induced oscillatory fluid flow can lead to significant changes of velocities and attenuations of elastic waves in these rocks. In this paper, we consider the influence of a squirt flow (local flow between the pores of different compressibility) on the sonic log response. The calculations are performed using a unified model describing the joint influence of squirt flow and Biot's global flow. The results show that the influence of the squirt flow increases with increase of a signal frequency. This influence is relatively small in the case of the Stoneley wave but it is significant in the case of P and S waves.
引用
收藏
页码:1082 / 1091
页数:10
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