合水东地区煤层气富集成藏的地质因素分析及有利区预测  

Geological factors’analysis of coalbed methane’s accumulation in Heshui east area and its prediction of favorable areas

作　　者：胡驰 李新虎[1,2,3] 李晓君 李健 郭杰 HU Chi;LI Xinhu;LI Xiaojun;LI Jian;GUO Jie(College of Geology and Environment, Xi’an University of Science and Technology, Xi’an 710054, China;Shaanxi Provincial Key Laboratory of Geological Support for Coal Green Exploitation, Xi’an 710054, China;Key Laboratory of Coal Resources Exploration and Comprehensive Utilization, Ministry of Land and Resources, Xi’an 710021, China;Gansu Coal Geological Exploration Institute, Lanzhou 730000, China)

机构地区：[1]西安科技大学地质与环境学院,西安710054 [2]陕西省煤炭绿色开发地质保障重点实验室,西安710054 [3]国土资源部煤炭资源勘查与综合利用重点实验室,西安710021 [4]甘肃煤炭地质勘查院,兰州730000

出　　处：《中国科技论文》2021年第9期984-991,共8页China Sciencepaper

基　　金：国家自然科学基金资助项目(41502159);国土资源部煤炭资源勘查与综合利用重点实验室开放课题项目(KF2018-4)。

摘　　要：为了确定合水东地区3个主要煤层含气量的主控因素,预测煤层气富集区,为后续煤层气的开发利用提供一定的理论指导,采用灰色关联分析方法,并结合化验、测井等地质资料探讨了合水东地区地质构造、煤层埋藏深度、煤变质作用、煤厚、顶板岩性、含水量和灰分产率对3个主要煤层含气量的影响。研究结果表明:地质构造和煤层埋藏深度是影响该区煤层含气量的主控因素;次级褶曲导致煤层埋深起伏较大,煤层含气量靠近向斜轴部增大,靠近背斜轴部减小;研究区南部区块Ⅰ处为煤层气富集最有利区域。In order to determine the main controlling factors of the three main coalbed methane(CBM)content in Heshui east area,and then predict the CBM enrichment area,and provide certain theoretical guidance for the subsequent development and utilization of CBM.The gray correlation analysis method was adopted to analyze the influence of geological structure,coal seam burial depth,coal metamorphism,coal thickness,roof lithology,water content and ash yield on the gas content of the three main coal seam in the study area on the basis of geological data such as assay and logging.The results indicates that geological structure and coal seam burial depth are the main controlling factors affecting the gas content of CBM in this area.The secondary folds cause large fluctuations in the buried depth of the coal seam,and the gas content of the coal seam increases near the syncline axis and decreases near the anticline axis;BlockⅠin the southern part of the study area is the most favorable area for CBM enrichment.

关 键 词：合水东地区 煤层气 灰色关联 主控因素 储层特征 

分 类 号：P618.11[天文地球—矿床学]