海相油气地质2025，Vol.30Issue(2)：177-184,8.DOI:10.3969/j.issn.1672-9854.2025.02.008
页岩油储层脆性指数贝叶斯叠前地震直接反演方法
Bayesian direct inversion method for brittleness index of shale oil reservoir based on prestack seismic data
张红杰 1杨光 1吴昊 1孙龙 1刘智军 1高巍 2乔传乡 2曾勇坚3
作者信息
- 1. 中国石油吉林油田公司地球物理勘探研究院
- 2. 中国石油吉林油田公司勘探事业部
- 3. 北京普瑞斯安能源科技有限公司
- 折叠
摘要
Abstract
Reasonable prediction of fracture parameters and brittleness index plays an indicative role in the hydraulic fracturing process in the exploration and development of shale oil reservoirs and lays the foundation for the comprehensive evaluation of sweet spots in a study area.Starting from the anisotropy theory,based on the linear sliding theory,scattering theory and Born approximation theory,this paper derives the anisotropic reflection coefficient equation of HTI media containing the brittleness index of Young's modulus to Poisson's ratio,Poisson's ratio,density,quasi-fracture normal weakness and quasi-fracture tangential weakness.And under the Bayesian framework,the expectation maximization algorithm introduces the conditional expectation value of the implicit variable into the random simulation of the model parameters at each iteration to solve the problem that the likelihood function can not take extreme values when the posterior distribution function of the model parameters is implicit or nonlinear.Compared with the traditional method of obtaining the maximum a posteriori probability solution,the introduction of the expectation maximization algorithm can obtain more stable model parameter inversion results,and finally realize the direct prestack seismic inversion of the brittleness index and fracture parameters of shale oil reservoirs.Model testing and actual data application verify the accuracy and applicability of the inversion method proposed in this paper.关键词
页岩油储层/裂缝参数/脆性指数/贝叶斯理论/直接反演Key words
shale oil reservoir/fracture parameters/brittleness index/Bayesian theory/direct inversion分类
地质学引用本文复制引用
张红杰,杨光,吴昊,孙龙,刘智军,高巍,乔传乡,曾勇坚..页岩油储层脆性指数贝叶斯叠前地震直接反演方法[J].海相油气地质,2025,30(2):177-184,8.
