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

doi:10.1088/1674-1056/ab888b

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.

Keywords: frequency-dependent reflection porous media thin bed reservoir

Received: 15 January 2020
Revised: 31 March 2020
Accepted manuscript online:

PACS:	43.20.Gp	(Reflection, refraction, diffraction, interference, and scattering of elastic and poroelastic waves)
	43.20.El	(Reflection, refraction, diffraction of acoustic waves)
	82.33.Ln	(Reactions in sol gels, aerogels, porous media)

Fund: 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).

Corresponding Authors: Chun-Hui Tao
E-mail: taochunhuimail@163.com

Cite this article:

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 2020 Chin. Phys. B 29 064301

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