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Sound field in fluid-saturated porous medium is closely related to the viscosity of fluid and the heterogeneity of porous medium. In order to improve the physical mechanism of wave propagation in porous medium and expand its application in borehole acoustic field, the shear stress of porous fluid and the heterogeneity of pore structure are considered. The wave theory in porous medium containing viscous fluid is deduced based on the Biot theory. The influence of porous medium parameters on slow shear wave is analyzed, and the dispersion and attenuation of elastic wave caused by shear stress balance in porous fluid under the influence of inhomogeneous pore structure are studied. The analytical solution of borehole acoustic field in porous medium containing viscous fluid is further derived. The phase velocity and attenuation of borehole mode waves in heterogeneous porous medium, and the waveform of borehole full wave are calculated. The influence of pore fluid viscosity on borehole full wave is analyzed. The results show that there are slow shear waves in the porous medium containing viscous fluid. The slow shear wave is characterized by low velocity and large attenuation. In heterogeneous porous medium, the balance process of shear stress related to slow shear wave not only leads to the dispersion and attenuation of fast P-wave, but also affects the propagation characteristics of borehole pseudo Rayleigh wave and Stoneley wave. In addition, the pore fluid viscosity has a great influence on the borehole Stoneley wave. The present work improves the physical mechanism of acoustic wave propagation in porous medium and provides theoretical guidance for the explanation and application of borehole acoustic waves in porous formations.
[1] 李红星, 张嘉辉, 樊嘉伟, 陶春辉, 肖昆, 黄光南, 盛书中, 宫猛 2022 71 089101
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[9] 杨博, 章成广, 蔡明, 甘泉, 蔡德洋, 朱雷 2019 地球物理学进展 34 1127
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Yang B, Zhang C G, Cai M, Gan Q, Cai D Y, Zhu L 2019 Progress in Geophysics 34 1127
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[10] Qi Q M, Fu L Y, Deng J X, Cao J X 2021 Geophysics 86 1
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[11] Winkler K W 1985 J. Geophys. Res. Solid Earth 90 6793
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[12] Gist G A 1991 J. Acoust. Soc. Am. 90 2370
Google Scholar
[13] 邓继新, 史謌, 俞军 2003 北京大学学报(自然科学版) 39 835
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Deng J X, Shi X, Yu J 2003 Acta Scientiarum Naturalium Universitatis Pekinensis 39 835
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[14] Feng J X, Teng Q Z, He X H, Qing L B, Li Y 2018 Comput. Mater. Sci. 144 181
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[15] 陈培元, 杨辉廷, 贾兆扬 2018 中国海上油气 30 31
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[16] Liu Q R, Katsube N 1990 J. Acoust. Soc. Am. 88 1045
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[27] 邵婕, 唐杰, 孙成禹 2016 地球物理学进展 31 334
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Shao J, Tang J, Sun C Y 2016 Progr. Geophys. 31 334
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[29] Müller T M, Sahay P N 2011 Phys. Rev. E 84 026329
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Hu H S, Wang K X 2001 Chin. J. Geophys. 44 135
Google Scholar
[31] 卢明辉, 巴晶, 杨慧珠 2009 工程力学 26 36
Lu M H, Ba J, Yang H Z 2009 Eng. Mech. 26 36
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[33] Bourbie T, Coussy O, Zinszner B, Junger M C 1992 J. Acoust. Soc. Am. 91 3080
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图 1 四种体波的相速度与衰减 (a) 快纵波; (b) 快横波; (c) 慢纵波; (d) 慢横波
Figure 1. Phase velocity and attenuation of four kinds of body waves: (a) Fast P-wave; (b) fast S-wave; (c) slow P-wave; (d) slow S-wave.
图 2 慢横波的相速度与衰减随孔隙介质参数的变化 (a) 孔隙度; (b) 渗透率; (c) 流体黏度
Figure 2. Variation of phase velocity and attenuation of slow shear wave with porous media parameters: (a) Porosity; (b) permeability; (c) fluid viscosity.
图 3 均匀及不同非均匀孔隙介质中快纵波的相速度与衰减
Figure 3. The phase velocity and attenuation of fast P wave in homogeneous porous medium and different inhomogeneous porous media
图 4 k(ω)的归一化幅值与相位
Figure 4. Normalized amplitude and phase of
$ k(\omega ) $ .
图 5 非均匀孔隙介质地层井孔模型
Figure 5. Borehole model of heterogeneous porous media formation.
图 6 模式波的相速度与衰减 (a) 斯通利波; (b) 一阶伪瑞利波; (c) 二阶伪瑞利波
Figure 6. Phase velocity and attenuation of mode waves: (a) Stoneley wave; (b) the first order pseudo Rayleigh wave; (c) the second order pseudo Rayleigh wave.
图 7 全波波形 (a) 源距为4 m时的单道波形; (b) 8道阵列全波波形
Figure 7. Full wave waveform: (a) Single channel waveform at source distance of 4 m; (b) 8-channel array full wave waveform.
图 8 低频斯通利波测井(a)及常规单极子测井(b)的全波波形
Figure 8. Full wave waveform of low-frequency Stoneley wave logging (a) and conventional monopole logging (b).
图 9 斯通利波的相速度与衰减随孔隙流体黏度的变化
Figure 9. Phase velocity and attenuation of Stoneley wave changing with pore fluid viscosity.
表 1 孔隙介质参数
Table 1. Parameters of porous media.
参
数${\rho _{\rm{s}}}$/(kg·m–3) ${\rho _{\rm{f}}}$/(kg·m–3) $ {k_0} $/D $ \eta $/% ${\mu _{\rm{f}}}$/(Pa·s) $ {S^\infty } $ ${K_{\rm{f}}}$/GPa $ {K_0} $/GPa ${K_{\rm{s}}}$/GPa $ {\mu _0} $/GPa ${\mu _{\rm{s}}}$/GPa 值 2650 1000 1 20 10–3 3 2.25 14.39 35.7 14 44 
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表 2 水在不同温度下的黏度
Table 2. Viscosity of water at different temperatures.
温度/℃ 20 50 150 黏度/(10–3 Pa·s) 1.00 0.55 0.21
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[1] 李红星, 张嘉辉, 樊嘉伟, 陶春辉, 肖昆, 黄光南, 盛书中, 宫猛 2022 71 089101
Google Scholar
Li H X, Zhang J H, Fan J W, Tao C H, Xiao K, Huang G N, Sheng S Z, Gong M 2022 Acta Phys. Sin. 71 089101
Google Scholar
[2] 乔厚, 何锃, 张恒堃, 彭伟才, 江雯 2019 68 128101
Google Scholar
Qiao H, He Y, Zhang H K, Peng W C, Jiang W 2019 Acta Phys. Sin. 68 128101
Google Scholar
[3] Benoit G, Heinkélé C, Gourdon E 2013 J. Acoust. Soc. Am. 134 4782
Google Scholar
[4] Biot M A 1956 J. Acoust. Soc. Am. 28 168
Google Scholar
[5] Biot M A 1956 J. Acoust. Soc. Am. 28 179
Google Scholar
[6] Biot M A 1962 J. Appl. Phys. 33 1482
Google Scholar
[7] Rosenbaum J H 1974 Geophysics 39 14
Google Scholar
[8] Li K S, Gao J, Ju X D, Sun H F 2018 J. Geophys. Eng. 15 2266
Google Scholar
[9] 杨博, 章成广, 蔡明, 甘泉, 蔡德洋, 朱雷 2019 地球物理学进展 34 1127
Google Scholar
Yang B, Zhang C G, Cai M, Gan Q, Cai D Y, Zhu L 2019 Progress in Geophysics 34 1127
Google Scholar
[10] Qi Q M, Fu L Y, Deng J X, Cao J X 2021 Geophysics 86 1
Google Scholar
[11] Winkler K W 1985 J. Geophys. Res. Solid Earth 90 6793
Google Scholar
[12] Gist G A 1991 J. Acoust. Soc. Am. 90 2370
Google Scholar
[13] 邓继新, 史謌, 俞军 2003 北京大学学报(自然科学版) 39 835
Google Scholar
Deng J X, Shi X, Yu J 2003 Acta Scientiarum Naturalium Universitatis Pekinensis 39 835
Google Scholar
[14] Feng J X, Teng Q Z, He X H, Qing L B, Li Y 2018 Comput. Mater. Sci. 144 181
Google Scholar
[15] 陈培元, 杨辉廷, 贾兆扬 2018 中国海上油气 30 31
Google Scholar
Chen P Y, Yang H T, Jia Z Y 2018 Chin. Offshore Oil Gas 30 31
Google Scholar
[16] Liu Q R, Katsube N 1990 J. Acoust. Soc. Am. 88 1045
Google Scholar
[17] 魏修成, 卢明辉, 巴晶, 杨慧珠 2008 地球 51 213
Google Scholar
Wei X C, Lu M H, Ba J, Yang H Z 2008 Chin. J. Geophys. 51 213
Google Scholar
[18] Gao W 2016 SEG Technical Program Expanded Abstracts 2016 Dallas, Texas, October 16-21, 2016 pp3871–3875
[19] Sahay P N 2008 Geophysics 73 N19
Google Scholar
[20] Ciz R, Gurevich B, Markov M 2006 Geophys. J. Int. 165 957
Google Scholar
[21] Müller T M, Gurevich B 2005 J. Acoust. Soc. Am. 117 2732
Google Scholar
[22] Mavko G, Nur A 1975 J. Geophys. Res. 80 1444
Google Scholar
[23] Dvorkin J, Nur A 1993 Geophysics 58 524
Google Scholar
[24] 崔志文, 刘金霞, 王春霞, 王克协 2010 59 8655
Google Scholar
Cui Z W, Liu J X, Wang C X, Wang K X 2010 Acta Phys. Sin. 59 8655
Google Scholar
[25] Berryman J G, Wang H F 2000 Int. J. Rock Mech. Min. Sci. 37 63
Google Scholar
[26] 赵延林, 曹平, 唐劲舟, 马文豪, 李树清, 王卫军 2017 中南大学学报(自然科学版) 48 168
Google Scholar
Zhao Y L, Cao P, Tang J Z, Ma W H, Li S Q, Wang W J 2017 J. Cent. South Univ. (Sci. Technol.) 48 168
Google Scholar
[27] 邵婕, 唐杰, 孙成禹 2016 地球物理学进展 31 334
Google Scholar
Shao J, Tang J, Sun C Y 2016 Progr. Geophys. 31 334
Google Scholar
[28] Müller T M, Sahay P N 2011 J. Acoust. Soc. Am. 129 2785
Google Scholar
[29] Müller T M, Sahay P N 2011 Phys. Rev. E 84 026329
[30] 胡恒山, 王克协 2001 地球 44 135
Google Scholar
Hu H S, Wang K X 2001 Chin. J. Geophys. 44 135
Google Scholar
[31] 卢明辉, 巴晶, 杨慧珠 2009 工程力学 26 36
Lu M H, Ba J, Yang H Z 2009 Eng. Mech. 26 36
[32] Zhang X M, Müller T M 2019 Geophysics 84 WA1
Google Scholar
[33] Bourbie T, Coussy O, Zinszner B, Junger M C 1992 J. Acoust. Soc. Am. 91 3080
Google Scholar
[34] Müller T M, Sahay P N 2011 Appl. Phys. Lett. 98 168
Google Scholar
[35] 崔志文, 刘金霞, 王克协 2005 吉林大学学报(理学版) 43 803
Cui Z W, Liu J X, Wang K X 2005 J. Jilin Univ. (Sci. Ed.) 43 803
[36] Markova I, Ronquillo J G, Markov M, Gurevich B 2014 Geophys. J. Int. 196 1082
Google Scholar
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