基于底板构造曲率的煤层高渗区预测  

Prediction of higher-permeability region of coalbed methane based on tectonic curvature of coal-seam floor

作　　者：黄波 郑启明 秦勇[2] 石松林 HUANG Bo;ZHENG Qiming;QIN Yong;SHI Songlin(College of Resources and Environment,Henan University of Engineering,Zhengzhou 451191,Henan,China;Key Laboratory of Calbed Methane Resources and Reservoir Formation Process,Ministry of Education,China University of Mining and Technology,Xuzhou 221008,Jiangsu,China)

机构地区：[1]河南工程学院资源与环境学院,河南郑州451191 [2]中国矿业大学煤层气资源与成藏过程教育部重点实验室,江苏徐州221008

出　　处：《河南理工大学学报（自然科学版）》2020年第6期43-50,共8页Journal of Henan Polytechnic University（Natural Science）

基　　金：国家科技重大专项课题(2016ZX05066-001);国家自然科学基金资助项目(41502154);河南省科技攻关项目(182102310016)。

摘　　要：为预测古交区块8号煤层渗透率,基于最大构造曲率预测煤层裂缝渗透率原理,采用差分法计算煤层底板最大构造曲率,通过分析最大构造曲率、煤层厚度和裂缝间距之间的关系,构建预测煤层渗透率的数值模型。预测结果表明:古交区块煤层渗透率介于0.002~0.650 mD,北部煤层渗透率最高,东部最低;采用该模型预测的煤层渗透率明显高于试验测试的孔隙渗透率,而与试井、试验测试裂缝渗透的结果较为吻合,表明采用此模型预测煤层裂缝渗透率是可行的。To predict the permeability of No.8 coal seam in Gujiao block,the principle of calculation of coal seam fracture permeability by maximum tectonic curvature was elobrated.The maximum tectonic curvature of coal-seam floor was calculated by the difference method,and a numerical model for predicting coal-seam permeability was established by analyzing the relationship among the maximum tectonic curvature,coal seam thickness and fracture spacing.The prediction results showed that the coal seam permeability in the Gujiao block was between 0.002~0.650 mD,with the highest in the north and the lowest in the East.The permeability of the coal seam predicted by this model was significantly higher than that of the pore permeability tested by the experiment,which was consistent with the result of well test and fracture permeability.It showed that it was feasible to use this model to predict the coal seam fracture permeability.

关 键 词：煤层裂缝渗透率 底板最大构造曲率 古交区块 

分 类 号：P678.11[天文地球—海洋地质]