石油地球物理勘探2024，Vol.59Issue(4)：875-886,12.DOI:10.13810/j.cnki.issn.1000-7210.2024.04.025
VTI介质流体因子及各向异性参数直接反演方法
Direct inversion method for fluid factors and anisotropy parameters in VTI media
摘要
Abstract
Reservoir fluid identification is an important research direction in the field of oil and gas exploration.Shale reservoirs have strong transverse isotropy with a vertical axis of symmetry(VTI),undeniably impacting fluid factor estimation.Based on the Rüger longitudinal wave reflection coefficient equation,this paper pro-poses an inversion method for fluid factor,Young's modulus,and anisotropy parameters based on the elastic impedance of VTI media.Firstly,a reflection coefficient approximate formula and an elastic impedance equa-tion represented by Russell fluid factor,Young's modulus,and equivalent anisotropic parameters are derived.Then,the fluid factor,Young's modulus,and anisotropic parameters are estimated through elastic impedance inversion,and the influence of anisotropic parameters on the inversion results is compared.Model testing and practical application of work area data show that this method can reasonably and accurately predict fluid factors,Young's modulus,and anisotropic parameters,providing a new method for identifying shale reservoir fluids,predicting brittle parameters,and predicting the anisotropic development degree.关键词
储层/流体识别/等效各向异性/叠前反演/弹性阻抗Key words
Reservoir/fluid identifying/equivalent anisotropy/prestack inversion/elastic impedance分类
天文与地球科学引用本文复制引用
潘菲,李胜军,秦德文,陈康,高建虎,张广智..VTI介质流体因子及各向异性参数直接反演方法[J].石油地球物理勘探,2024,59(4):875-886,12.基金项目
本项研究受国家自然科学基金项目"高精度地震导向钻井关键技术及软件"(U23B6010)、"基于深度学习的深层裂缝储层参数地震反演方法"(42074136)和中国石油前瞻性基础性项目"复杂气藏地震识别与预测技术研究"(2021DJ0606)联合资助. （U23B6010）
