Frequency-dependent reflection of elastic wave from thin bed in porous media

doi:10.1088/1674-1056/ab888b

中国物理B ›› 2020, Vol. 29 ›› Issue (6): 64301-064301.doi: 10.1088/1674-1056/ab888b

• ELECTROMAGNETISM, OPTICS, ACOUSTICS, HEAT TRANSFER, CLASSICAL MECHANICS, AND FLUID DYNAMICS • 上一篇下一篇

Frequency-dependent reflection of elastic wave from thin bed in porous media

Hong-Xing Li(李红星), Chun-Hui Tao(陶春辉), Cai Liu(刘财), Guang-Nan Huang(黄光南), Zhen-An Yao(姚振岸)

1 State Key Laboratory of Nuclear Resources and Environment, East China University of Technology, Nanchang 330013, China;
2 Key Laboratory of Submarine Geosciences, Second Institute of Oceanography, Ministry of Natural Resources, Hangzhou 310012, China;
3 School of Oceanography, Shanghai Jiao Tong University, Shanghai 200240, China;
4 Department of Geophysics, Jilin University, Changchun 130026, China

收稿日期:2020-01-15 修回日期:2020-03-31 出版日期:2020-06-05 发布日期:2020-06-05
通讯作者: Chun-Hui Tao E-mail:taochunhuimail@163.com
基金资助:
Project supported by the National Natural Science Foundation of China (Grant Nos. 41764006, 41364004, and 41504095), the Chinese Study Abroad Fund (Grant No. 201508360117), the National Key Research and Development Program of China (Grant No. 2018YFC0309901), and the COMRA Major Project, China (Grant No. DY135-S1-01-01).

Frequency-dependent reflection of elastic wave from thin bed in porous media

Hong-Xing Li(李红星)¹, Chun-Hui Tao(陶春辉)^2,3, Cai Liu(刘财)⁴, Guang-Nan Huang(黄光南)¹, Zhen-An Yao(姚振岸)¹

1 State Key Laboratory of Nuclear Resources and Environment, East China University of Technology, Nanchang 330013, China;
2 Key Laboratory of Submarine Geosciences, Second Institute of Oceanography, Ministry of Natural Resources, Hangzhou 310012, China;
3 School of Oceanography, Shanghai Jiao Tong University, Shanghai 200240, China;
4 Department of Geophysics, Jilin University, Changchun 130026, China

Received:2020-01-15 Revised:2020-03-31 Online:2020-06-05 Published:2020-06-05
Contact: Chun-Hui Tao E-mail:taochunhuimail@163.com
Supported by:
Project supported by the National Natural Science Foundation of China (Grant Nos. 41764006, 41364004, and 41504095), the Chinese Study Abroad Fund (Grant No. 201508360117), the National Key Research and Development Program of China (Grant No. 2018YFC0309901), and the COMRA Major Project, China (Grant No. DY135-S1-01-01).

摘要/Abstract

摘要： The reflection of elastic wave from thin bed in porous media is important for oil and gas reservoir seismic exploration. The equations for calculating frequency-dependent reflection amplitude versus incident angle (FDAVA) from thin bed in porous media are obtained based on porous media theory. Some conclusions are obtained from numerical analysis, specifically, slow compression wave may be ignored when considering boundary conditions in most situations; the dispersion of reflection from thin bed is much higher than that from thick layer and is periodic in frequency domain, which is affected by the thickness of thin bed, velocity, and incident angle; the reflection amplitude envelope in frequency domain decays exponentially, which is affected by the thickness of thin bed, attenuation, and incident angle; the reflection amplitude increases with thickness of thin bed increasing, and then it decreases when the thickness reaches to a quarter of wavelength.

关键词: frequency-dependent reflection, porous media, thin bed, reservoir

Abstract: The reflection of elastic wave from thin bed in porous media is important for oil and gas reservoir seismic exploration. The equations for calculating frequency-dependent reflection amplitude versus incident angle (FDAVA) from thin bed in porous media are obtained based on porous media theory. Some conclusions are obtained from numerical analysis, specifically, slow compression wave may be ignored when considering boundary conditions in most situations; the dispersion of reflection from thin bed is much higher than that from thick layer and is periodic in frequency domain, which is affected by the thickness of thin bed, velocity, and incident angle; the reflection amplitude envelope in frequency domain decays exponentially, which is affected by the thickness of thin bed, attenuation, and incident angle; the reflection amplitude increases with thickness of thin bed increasing, and then it decreases when the thickness reaches to a quarter of wavelength.

Key words: frequency-dependent reflection, porous media, thin bed, reservoir

中图分类号: (Reflection, refraction, diffraction, interference, and scattering of elastic and poroelastic waves)

43.20.Gp

43.20.El (Reflection, refraction, diffraction of acoustic waves) 82.33.Ln (Reactions in sol gels, aerogels, porous media)

李红星, 陶春辉, 刘财, 黄光南, 姚振岸. Frequency-dependent reflection of elastic wave from thin bed in porous media[J]. 中国物理B, 2020, 29(6): 64301-064301.

Hong-Xing Li(李红星), Chun-Hui Tao(陶春辉), Cai Liu(刘财), Guang-Nan Huang(黄光南), Zhen-An Yao(姚振岸). Frequency-dependent reflection of elastic wave from thin bed in porous media[J]. Chin. Phys. B, 2020, 29(6): 64301-064301.

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Frequency-dependent reflection of elastic wave from thin bed in porous media

Frequency-dependent reflection of elastic wave from thin bed in porous media

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