石油科学通报2025，Vol.10Issue(6)：1167-1187,21.DOI:10.3969/j.issn.2096-1693.2025.01.031
基于反射率法的黏弹各向异性介质地震响应分析
Seismic response analysis of viscoelastic and anisotropic media based on reflectivity method
摘要
Abstract
With the continued expansion of oil and gas exploration into deep and ultra-deep formations,the refined characteri-zation of reservoir anisotropy and viscoelastic behavior has become an urgent and critical challenge.Systematic investigation of the seismic response of viscoelastic anisotropic formations is essential for improving the accuracy of reservoir prediction.In this study,an equivalent petrophysical model incorporating a multi-scale fracture system is introduced to elucidate the mechanisms by which reservoir physical parameters influence P-wave attenuation and dispersion.Subsequently,by enforcing stress-strain continuity at each interface and applying the composite matrix method,reflection coefficients are recursively computed for layered media and convolved with a source wavelet to generate synthetic seismic records.A forward-modeling formulation for viscoelastic anisotropic media is derived from the analytical solution of the one-dimensional wave equation.Traditional AVO forward modeling typically assumes that the media above and below a reflection boundary are infinite half-spaces,that is,the sin-gle-interface assumption.The proposed method overcomes this limitation by enabling a comprehensive description of amplitude variations with both incidence angle and azimuth,while simultaneously accounting for fluid-induced dispersion and attenuation as well as propagation effects such as interbed multiple reflections,mode conversions,and transmission losses.This leads to a more realistic representation of seismic-wave propagation in complex media.Finally,the developed viscoelastic anisotropic forward-modeling framework is applied to both simplified layered models and well-log-constrained models to investigate seismic responses under varying reservoir conditions.The results clarify how reservoir parameters such as oil saturation and fracture density influence seismic signatures,providing new theoretical support and technical guidance for fracture characterization and fluid prediction in complex reservoirs.关键词
黏弹各向异性/裂缝储层/地震正演/解析求解/岩石物理模型Key words
viscoelastic and anisotropic/fractured reservoir/seismic modeling/analytical solution/petrophysical model分类
能源科技引用本文复制引用
WANG Yongping,LI Jingye,YANG Qiyu,HAN Lei,ZHANG Yuning..基于反射率法的黏弹各向异性介质地震响应分析[J].石油科学通报,2025,10(6):1167-1187,21.基金项目
中国石油天然气集团有限公司关键核心技术攻关项目"碳酸盐岩储层裂缝识别与表征关键技术研究"(2024ZG21)资助 （2024ZG21）
