摘要：In a fractured porous hydrocarbon reservoir, wave velocities and reflections depend on frequency and incident angle. A proper description of the frequency dependence of amplitude variations with offset (AVO) signatures should allow effects of fracture infills and attenuation and dispersion of fractured media. The novelty of this study lies in the introduction of an improved approach for the investigation of incident-angle and frequency variations-associated reflection responses. The improved AVO modeling method, using a frequency-domain propagator matrix method, is feasible to accurately consider velocity dispersion predicted from frequency-dependent elasticities from a rock physics modeling. And hence, the method is suitable for use in the case of an anisotropic medium with aligned fractures. Additionally, the proposed modeling approach allows the combined contributions of layer thickness, interbedded structure, impedance contrast and interferences to frequency-dependent reflection coefficients and, hence, yielding seismograms of a layered model with a dispersive and attenuative reservoir. Our numerical results show bulk modulus of fracture fluid significantly affects anisotropic attenuation, hence causing frequency-dependent reflection abnormalities. These implications indicate the study of amplitude versus angle and frequency (AVAF) variations provides insights for better interpretation of reflection anomalies and hydrocarbon identification in a layered reservoir with vertical transverse isotropy (VTI) dispersive media.

关键字：Seismic anisotropy; Fractured media; Attenuation and dispersion; AVO responses; Frequency dependence

ISSN号：1672-5107

卷、期、页：卷18 期3 页758-772

发表日期：2021-06-01

期刊分区（SCI为中科院分区）：二区

收录情况：SCI（科学引文索引印刷版）,CSCD（中国科技引文期刊）（核心）,SCIE（科学引文索引网络版）

发表期刊名称：Petroleum Science

参与作者：Chen, Mo

通讯作者：李鑫龙

第一作者：贺艳晓,唐跟阳,董春晖,王尚旭

论文类型：期刊论文

论文概要：贺艳晓,李鑫龙,唐跟阳,董春晖,Chen, Mo,王尚旭，Modeling the effects of fracture infill on frequency-dependent anisotropy and AVO response of a fractured porous layer，Petroleum Science，2021，卷18 期3 页758-772

论文题目：Modeling the effects of fracture infill on frequency-dependent anisotropy and AVO response of a fractured porous layer