沁南东古城区块3~#煤储层显微孔裂隙特征及其成因  

Characteristics and Genesis of Micro-pore and Fracture in No.3 Coal Reservoir from Gucheng Block in Southeast of Qinshui Basin

作　　者：刘会虎 桑树勋[3] 薛俊华[1] 吴海燕 徐宏杰 兰天贺[2] 任波 黄艳辉 LIU Hui-hu;SANG Shu-xun;XUE Jun-hua;WU Hai-yan;XU Hong-jie;LAN Tian-he;REN Bo;HUANG Yan-hui(State Key Laboratory of Deep Coal Mining and Environment Protection,Huainan Mining Industry (Group)Co.,Ltd.,Huainan232001,China;School of Earth and Environment,Anhui University of Science and Technology,Huainan 232001,China;School of Resource and Earth Science,China University of Mining and Technology,Xuzhou 221116,China;School of Foreign Language,Anhui University of Science and Technology,Huainan 232001,China)

机构地区：[1]准南矿业集团有限责任公司深部煤层开采和环境保护国家重点实验室,安徽淮南232001 [2]安徽理工大学地球环境学院,安徽淮南232001 [3]中国矿业大学资源与地球科学学院,江苏徐州221116 [4]安徽理工大学外国语学院,安徽淮南232001

出　　处：《煤炭技术》2018年第12期86-88,共3页Coal Technology

基　　金：国家自然科学基金(41330638;41727801;41302129);中国博士后科学基金(2016M601992);安徽省自然科学基金(1608085QD81)

摘　　要：通过对沁南东古城区块3^#煤中显微孔裂隙观察研究了煤储层中显微孔裂隙特征及其成因。结果表明区内储层孔隙整体发育一般,主要为气孔、铸模孔,偶见变形组织孔、零星气孔和不规则孔隙;裂隙整体不发育,内生裂隙常见有静压裂隙、张裂隙和缩聚裂隙,外生裂隙常见直交裂隙、平行裂隙、斜交裂隙;铸模孔和组织孔及裂隙多出现充填现象,导致孔裂隙连通性能较差、储层渗透性下降。The characteristics and its genesis of micro-pore and fracture from No.3coal reservoir of Gucheng block in southeast of Qinshui basin were studied based on the observation of micro-pore and micro-fracture on the microscope.The results show that pore in coal reservoir develops in general,the main type of pore is gas pore,molded pore,and occasional distortional tissue pore,sporadic gas pore and irregular gas pore exist in coal sample.The fracture in coal reservoir develops poorly;the common types of the endogenic fracture are the static pressure fissure,the tension fracture,the shrinkage fracture respectively.The common types of exogenous fracture are the orthogonal fracture,the parallel fracture,the heterotropic fracture respectively.Most of molded pore and tissue pore,exogenous fractures are filled with the mineral,which leads to worsening the connectivity of the micro-pore and fracture,and reducing the permeability of coal reservoir.

关 键 词：古城区块 3^#煤储层 显微孔裂隙 

分 类 号：P618.11[天文地球—矿床学]