郯庐断裂带(安徽段)周缘盆地页岩气资源成因与勘探前景  

ORIGIN AND EXPLORATION PROSPECT OF SHALE GAS IN THE PERIPHERAL BASINS OF THE TAN-LU FAULT ZONE(ANHUI SECTION)

作　　者：李双应[1] 谢伟 赵丽丽[2] 魏星[1] 李敏 胡博 杨栋栋[1] 李红 张玲玲 朱义坤[3] 章中九[4] 周琛龙 孙贵[5] 丁海[5] LI Shuang-ying;XIE Wei;ZHAO Li-li;WEI Xing;LI Min;HU Bo;YANG Dong-dong;LI Hong;ZHANG Lingling;ZHU Yi-kun;ZHANG Zhong-jiu;ZHOU Chen-long;SUN Gui;DING Hai(School of Resources and Environmental Engineering,Hefei University of Technology,Hefei,Anhui 230009,China;Public Geological Survey Management Center of Anhui Province,Hefei,Anhui 230001,China;Institute of Exploration Technology of Anhui Province,Hefei,Anhui 230041,China;No.325 Unit,Bureau of Geology and Mineral Exploration of Anhui Province,Huaibei,Anhui 235000,China;Institute of Exploration and Research,Bureau of Coal Geology of Anhui Province,Hefei,Anhui 230088,China)

机构地区：[1]合肥工业大学资源与环境工程学院,安徽合肥230009 [2]安徽省公益性地质调查管理中心,安徽合肥230001 [3]安徽省勘查技术院,安徽合肥230041 [4]安徽省地质矿产勘查局325地质队,安徽淮北235000 [5]安徽省煤田地质局勘查研究院,安徽合肥230088

出　　处：《安徽地质》2020年第4期255-264,共10页Geology of Anhui

基　　金：安徽省公益性地质调查项目(2015-g-24)的成果;国家自然科学基金项目(41772098);中国地质调查局项目(12120113094300)的资助。

摘　　要：沿郯庐断裂带(安徽段)及其两侧中、新生代盆地发育,主要有潜山-望江盆地、合肥盆地、蒿沟-固镇盆地和来安-天长盆地。通过野外地质调查和剖面测量,地球物理、钻探和地球化学等方法,对盆地的页岩气资源进行潜力评价。初步查明这些盆地属于叠合盆地,即中—新生代陆相盆地叠加在古生代海相盆地之上。中—新生代盆地经历了坳陷-断陷-坳陷阶段。郯庐断裂带(安徽段)周缘盆地页岩气总资源量为3.711×1012m^3,有利远景区包括望江凹陷,合肥盆地的晓天-舒城凹陷、定远凹陷和颖上凹陷,来安-天长盆地的滁州凹陷。深湖相泥岩和海相(泥)灰岩是最主要的烃源岩层位,主要包括中—新生代的黑石渡组、朱巷组、阜宁组、戴南组,以及古生代的凤台组、杨柳岗组、栖霞组、孤峰组、大隆组和三叠纪的南陵湖组等。沿郯庐断裂带和晓天-磨子潭断裂发育的断陷盆地和下伏的古生代原型盆地具有更大的勘探潜力。Mesozoic-Cenozoic basins develop along the Tan-Lu fault zone(Anhui section)and on both sides of it,mainly consisting of the Qianshan-Wangjiang basin,Hefei basin,Haogou-Guzhen basin and Lai’an-Tianchang basin.Through field geological survey and profile survey,geophysical,drilling,and geochemical methods,we evaluate the potential of shale gas resources in the basins,which are preliminarily identified as superimposed basins,i.e.,Mesozoic-Cenozoic continental basins superimposed on the Paleozoic marine basins.The Mesozoic-Cenozoic basins have experienced the stages of depression,faultdown and depression again.The shale gas resources total 3.711×1012m^3 in the basins around the Tan-Lu fault zone(Anhui section)and the favorable potential areas include the Wangjiang sag,the Xiaotian-Shucheng,Dingyuan and Yingshang sags of the Hefei Basin,and the Chuzhou sag of the Laian-Tianchang basin.The hydrocarbon source rocks are mostly composed of deep lacustrine mudstones and marine limestones or marlites,which develop in the Heishidu,Zhuxiang,Funing and Dainan Formations of Mesozoic-Cenozoic time,the Fengtai,Yangliugang,Qixia,Gufeng and Dalong Formations of Paleozoic,and the Nanlinghu Formation of Triassic.The faulted basins that develop along the Tan-Lu fault zone and the Xiaotian-Mozitan fault,and the underlying Paleozoic prototype basins exhibit greater potential for exploration of shale gas.

关 键 词：页岩气 烃源岩 成因规律 勘探前景 郯庐断裂带 安徽 

分 类 号：P5[天文地球—地质学]