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引用本文:陈科,翟刚毅,包书景,宋腾,林拓,李浩涵,金春爽,孟凡洋,唐显春,张焱林. 华南黄陵隆起构造演化及其对页岩气保存的控制作用[J]. 中国地质, 2020, 47(1): 161-172.
CHEN Ke,ZHAI Gangyi,BAO Shujing,SONG Teng,LIN Tuo,LI Haohan,JIN Chunshuang,MENG Fanyang,TANG Xianchun,ZHANG Yanlin. Tectonic evolution of the Huangling uplift and its control effect on shale gas preservation in South China[J]. Geology in China, 2020, 47(1): 161-172(in Chinese with English abstract).
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华南黄陵隆起构造演化及其对页岩气保存的控制作用
陈科1, 翟刚毅1, 包书景1, 宋腾1, 林拓1, 李浩涵1, 金春爽1, 孟凡洋1, 唐显春2, 张焱林3
1.中国地质调查局油气资源调查中心, 北京 100083;2.中国地质科学院, 北京 100037;3.湖北省地质调查院, 湖北 武汉 430022
摘要:
近期中国南方页岩气勘查在黄陵隆起南缘的下寒武统和震旦系取得重大突破,本文针对古老地层页岩气构造保存问题,研究黄陵隆起构造演化历史,反演钻井沉积地层埋藏史,通过二维地震剖面解析黄陵隆起南缘的构造学特征,统计分析相关地质年代学数据。认为该区域在约800 Ma经历了花岗岩侵入,形成了以花岗岩为主体的黄陵隆起基底;该区域在800~200 Ma构造较稳定,缺乏这一时期的构造年代学数据;中侏罗世震旦系陡山沱组埋深可达约8 km,晚侏罗世及以后经过多期抬升至现在的构造格局。本研究说明黄陵隆起的古老基底经过元古宙大量花岗岩侵入,可能均质性高而表现为刚性基底,后期所遭受构造改造程度较低,埋深相对较浅。因此,该地区页岩表现为演化程度适中,构造改造弱,后期热事件影响小,有利于页岩气的保存,是目前黄陵隆起南缘获得页岩气勘查突破的关键。并指出南方具有类似构造的雪峰山隆起、神农架背斜和汉南古陆周缘具有良好的下寒武统页岩气勘查潜力。
关键词:  页岩气  热演化程度  黄陵隆起  构造演化  保存条件  油气资源调查工程
DOI:10.12029/gc20200113
分类号:P618.13
基金项目:中国地质调查局项目“武陵山地区下古生界海相页岩气基础地质调查”(DD20160177),“鄂西—渝东地区油气地质调查”(DD20190081)共同资助。
Tectonic evolution of the Huangling uplift and its control effect on shale gas preservation in South China
CHEN Ke1, ZHAI Gangyi1, BAO Shujing1, SONG Teng1, LIN Tuo1, LI Haohan1, JIN Chunshuang1, MENG Fanyang1, TANG Xianchun2, ZHANG Yanlin3
1.Oil and Gas Survey, China Geological Survey, Beijing 100083, China;2.Chinese Academy of Geological Sciences, Beijing 100037, China;3.Hubei Geological Survey, Wuhan 430022, Hubei, China
Abstract:
Significant breakthrough of shale gas exploration has been made in Lower Cambrian and Sinian shale on the north margin of the Yangtze block, South China. In this paper, the authors focused on the preservation condition of shale gas, with the purpose of investigating the tectonic evolution history of the Huangling uplift by means of geological survey and 2D seismic, geochronological and drilling data. The results are as follows:at~800Ma, granite intrusion took place in the Huangling dome basement, primarily shown by granites replacing metamorphism rocks; during 800~200Ma, no significant tectonic movement occurred, with no geochorologic data; the Sinian shale was buried at the depth of about 8km during Middle Jurassic. This study indicates that the rigid basement of the Huangling uplift was mainly composed of homogeneous granite, without intensive deformation. As the main challenges of the widely distributed Lower Cambrians and Sinian shale are high-maturity and intensive deformation, a geological unit with a dome probably is a favorable zone for the old age shale gas. Therefore, it is shown that the adjacent zones of the the Xuefengshan, Shennongjia and Hannan are geological units with a dome and probably have potentials for the exploration of shale in the Lower Cambrian strata.
Key words:  shale gas  degree of thermal evolution  Huangling uplift  preservation conditions  oil san gas geological exploration engineering