河南省煤田构造格局对煤层气储层物性和渗流特征的影响  

Influence of structural framework of coalfield on physical properties and seepage characteristics of reservoir in Henan Province

作　　者：赵发军[1,2,3] 于兴腾 郝富昌 刘彦伟[1,2] ZHAO Fajun;YU Xingteng;HAO Fuchang;LIU Yanwei(School of Safety Science and Engineering,Henan Polytechnic University,Jiaozuo 454000,China;State Key Laboratory Cultivation Base for Gas Geology and Gas Control,Jiaozuo 454000,China;Collaborative Innovation Center of Coal Work Safety,Henan Province,Jiaozuo 454000)

机构地区：[1]河南理工大学安全科学与工程学院,河南焦作454000 [2]河南省瓦斯地质与瓦斯治理重点实验室–省部共建国家重点实验室培育基地,河南焦作454000 [3]煤炭安全生产河南省协同创新中心,河南焦作454000

出　　处：《煤田地质与勘探》2018年第4期61-66,71,共7页Coal Geology & Exploration

基　　金：国家自然科学基金项目(51404099;51604101);河北省矿井灾害防治重点实验室开放基金项目(KJZH2014K05)~~

摘　　要：为了查明河南省不同构造区内二1煤层中气体的流动特征和煤体受构造变形分异后的独特性,采用实验数据分析、瓦斯地质和渗流学理论,研究煤中孔容分布、孔径受应力影响后的变化以及煤体强度受构造应力作用下的变形和破坏特点。结果表明,煤层中甲烷连续流型占优的排序为:太行构造区、崤熊构造区、嵩萁构造区。煤中甲烷流型差异受区域构造变形体制控制,太行构造区的拉伸变形导致煤体强度值域分布广,最大体应变大于其他区域;嵩萁构造区的重力滑动、剪切和伸展变形使煤体强度和孔隙率最低、最大体应变最小;崤熊构造区内煤体的最大体应变介于两者之间。该结论对河南省煤层气开发有指导意义。In order to find out the characteristics of gas flow characteristics in coal seams in different tectonic zones in Henan Province and to discover the uniqueness of the structure and deformation of coal mass,based on the experimental data analysis and gas geology and seepage theory,the changes of pore volume distribution and pore sizes under the influence of stress as well as the deformation and failure characteristics of coal strength in coalfield under the action of tectonic stress were studied.The results of the study show that the ranking of the dominant sequence of methane flow in coalbed is Taihang tectonic belt>Xiaoxiong tectonic belt>Songqi tectonic belt.The differences of patterns of methane flow in coalbed were controlled by the regional tectonic deformation system,the tensile strain of coal mass in Taihang tectonic zones caused wide distribution rang of strength of coal mass,higher porosity and largest max volumetric strain,the gravity slide and shearing and extension deformation in Songqi tectonic belt brought out lowest strength of coal mass,lowest porosity and least maximum volumetric strain in the three coal seams,the maximum volumetric strain of coal mass in Xiaoxiong tectonic belt was between that of Taihang tectonic belt and Songqi tectonic belt.The conclusion has guiding significance for CBM development.

关 键 词：煤田构造 变形分异 甲烷流动 煤体强度 

分 类 号：P617.50[天文地球—矿床学]