摘要
宿县矿区煤层气资源丰富,但开采难度较大,在研究淮北宿县矿区构造特征的基础上,探讨构造演化对矿区构造煤发育及煤层气赋存的控制。研究表明,研究区成煤期后经历了印支期、燕山期和喜马拉雅期等3期,尤以燕山期构造对区域内构造煤及煤层气赋存影响显著;按照构造煤形成机制将矿区构造煤分为9类3个变形系列,其中上盘宿东向斜构造煤发育程度要高于下盘的宿南向斜,且距构造发育区越近煤体变形越强。分析认为,宿县矿区煤层气分布受构造控制明显且与构造型态密切相关,以西寺坡逆冲断层为界,上盘煤层气含量高于下盘,但两盘构造及构造煤发育的差异性致使下盘煤储层渗透率高于上盘,宿南向斜区域更有利于煤层气开发。
CBM resources are abundant in the Suxian mining area, but hard to exploit. Based on mining area structural characteristic study in Suxian, Huaibei, discussed the controlling of tectonic evolution on tectonically deformde coal（TDC） development and CBM hosting. The study has shown that after coal-forming stage, the study area has experienced Indosinian, Yanshanian and Himalayan 3movements, especially the Yanshanian structures evidently impacted tectonically deformde coal（TDC） and CBM hosting in the area. According to tectonically deformde coal（TDC） formation mechanism divided the tectonically deformde coal（TDC） in the mining area into 9categories and 3 deformation series. In which, tectonically deformde coal（TDC） development degree in upper side Sudong syncline is higher than in under side Sunan syncline; the nearer the distance from structure developed area, the stronger the coal mass deformation. The analysis considered that structural controlling of CBM distribution in Suxian mining area is obvious and closely related to structural forms. Taking the Xisipo thrust as a boundary, upper side CBM content is higher than under side, but the discrepancy between structures and tectonically deformde coal（TDC） development in two sides caused permeability of under side coal reservoir is higher than upper side, thus Sunan syncline area more favorable to CBM exploitation.
出处
《中国煤炭地质》
2014年第11期26-30,共5页
Coal Geology of China
基金
国家科技重大专项(2011ZX05034)
江苏省普通高校研究生科研创新计划项目(CXZZ13-0944)
煤层气资源与成藏过程教育部重点实验室(中国矿业大学)开放基金(2013-007)资助
关键词
构造煤
煤层气
构造
瓦斯
宿县矿区
tectonoclastic coal
CBM
structure
gas
Suxian mining area
