摘要
在页岩气储层评价中,岩石脆性的评价可用于指导压裂施工层位的选择、评价储层可压性及预测压裂效果。由于储层的非均质性及高昂的取心成本,需结合测井曲线构建脆性指数对页岩气储层进行评价。基于常规测井资料,在利用带约束的最小二乘优化算法反演矿物组分的基础上,构建了基于矿物岩石力学特征差异分析的脆性指数模型对XX1井五峰-龙马溪组储层脆性进行计算。评价结果表明,计算脆性与实验分析脆性一致性好,平均相对误差为4.69%,且其变化规律与岩心分析变化规律较为一致,能较好地运用于实际可压性评价。
In shale gas reservoir evaluation,the evaluation of rock brittleness can be used to guide the selection of fracturing construction horizon,evaluate reservoir compressibility and predict fracturing effects.Due to the heterogeneity of the reservoir and the high cost of coring,it is necessary to construct a brittleness index combined with the logging curve to evaluate the shale gas reservoir.Based on the conventional logging data,the inversion of mineral components by constrained least squares optimization algorithm,the brittleness index model based on the difference in the rock mechanical characteristics is constructed to calculate the brittleness of Wufeng-Longmaxi reservoir in well XX1.The evaluation results showed that the calculated brittleness was in good agreement with the experimental analysis.The average relative error is 4.96%,and the variation law is consistent with the core analysis change law,so it can be applied to the actual compressibility evaluation.
作者
刘伟男
王敏
LIU Wei-nan;WANG Min(Key Laboratory of Exploration Technologies for Oil and Gas Resources,Yangtze University,Hubei Wuhan 430100,China;Hubei Cooperative Innovation Center of Unconventional Oil and Gas,Yangtze University,Hubei Wuhan 430100,China;PetroChina Research Institute of Petroleum Exploration and Development,Beijing 100083,China;Beijing UltraDo Resources Technology Company Limited,Beijing 100083,China)
出处
《当代化工》
CAS
2020年第2期458-461,466,共5页
Contemporary Chemical Industry
基金
长江大学优秀博士、硕士学位论文培育计划资助项目
国家科技重大专项,项目号:2016ZX05060001-012、2017ZX05032-003-005.
关键词
页岩气储层
脆性指数
矿物组分
常规测井
最优化方法
岩石力学差异
shale gas reservoirs
brittleness index
mineral composition
conventional logging data
optimization method
rock mechanics difference
作者简介
刘伟男(1995-),男,湖北省天门市人,长江大学硕士研究生,研究方向:从事水平井测井综合评价、非常规储层测井综合解释工作。E-mail:lwn1995@126.com;通讯作者:王敏(1984-),女,工程师,研究方向:测井综合解释。E-mail:wangminlog@petrochina.com.cn。
