物探与化探2025，Vol.49Issue(4)：826-837,12.DOI:10.11720/wtyht.2025.1506
基于叠前直接反演的页岩气储层脆性及裂缝参数预测方法
A method for predicting the brittleness and fracture parameters of shale gas reservoirs based on prestack direct inversion
摘要
Abstract
The conventional inversion of anisotropic media is often constrained by assumptions of narrow-angle incidence and weak changes in stratigraphic properties.Moreover,the prediction of rock elastic parameters typically involves linear inversion and indirect fit-ting,leading to less accurate and reliable inversion results of petrophysical parameters for anisotropic formations.Hence,this study de-rived the petrophysical models of Young's modulus,Poisson's ratio,and fracture parameters for vertical transverse isotropy(VTI)media.Based on the precise VTI reflection coefficient equation,this study proposed a Bayesian anisotropic nonlinear direct inversion method,constrained by the L1 norm,to predict the brittleness and fracture parameters of shale gas reservoirs through direct inversion.The pro-posed method yielded satisfactory application results in a study area of shale gas in Southwest China,offering a novel technique for char-acterizing shale gas reservoirs.关键词
VTI/非线性/直接反演/脆性参数/裂缝参数Key words
vertical transverse isotropy(VTI)/nonlinear/direct inversion/brittleness parameter/fracture parameter分类
天文与地球科学引用本文复制引用
石学文,王畅,张洞君,冯艳雯..基于叠前直接反演的页岩气储层脆性及裂缝参数预测方法[J].物探与化探,2025,49(4):826-837,12.基金项目
中国石油天然气股份有限公司科技项目(2023ZZ21YJ04) （2023ZZ21YJ04）
