石油物探2024，Vol.63Issue(4)：826-832,7.DOI:10.12431/issn.1000-1441.2024.63.04.011
基于Q弹性阻抗流体因子反演研究
Fluid factor inversion based on Q elastic impedance
摘要
Abstract
The problem of fluid factor inversion lies in the forward modeling using the reflectivities of inelastic media instead of e-lastic media for an accurate description of propagation.For seismic wave attenuation in inelastic media,a Q-based elastic fluid factor is obtained by disturbing the elastic fluid factor term with attenuation coefficient.The scattering equation of the Q elastic fluid fac-tor at the interface is derived under the assumptions of similar media and weak attenuation.The expression highly correlates with the P-velocity,S-velocity,and density terms in the context of complex number.The relationships between Q elastic fluid factor and P-and S-velocities are derived to obtain the equation of P-reflectivity of Q elastic fluid factor under above assumptions,and the re-lation between this equation and the reflectivity equation of perfectly elastic media is analyzed.Our method eliminates false bright spots on inversion sections,and thus it is possible to obtain accurate fluid responses under the assumption of attenuation elastic media.Field data application to Shengli oilfield shows more distinguishable fluid responses from surrounding rock responses com-pared with the routine method of fluid factor inversion.Our method mitigates the uncertainties of fluid detection to some extent and eliminates the artifacts generated by single-factor detection merely using amplitude.关键词
Q弹性阻抗/粘弹性介质/流体因子/储层反演/衰减系数/流体检测Key words
Q-elastic impedance/viscoelastic medium/fluid factor/reservoir inversion/attenuation cofficient/fluid detection分类
天文与地球科学引用本文复制引用
张如一,文欢,马永强,田建华,黄超,赵茂强..基于Q弹性阻抗流体因子反演研究[J].石油物探,2024,63(4):826-832,7.基金项目
国家自然科学基金项目(42174135,42074143)和国家重点研发计划变革性技术关键科学问题重点专项(2018YFA0702503)共同资助.This research is financially supported by the National Natural Science Foundation of China(Grant Nos.42174135,42074143)and the National Key R&D Program of China(Grant No.2018YFA0702503). （42174135,42074143）
