HYDROCARBON ACCUMULATION AND OIL-SOURCE CORRELATION IN THE FRONT OF JIANGNAN-XUEFENG MOUNTAIN——SERIES 3 OF THE SOUTHERN STRUCTURE STUDIES
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摘要: 江南—雪峰隆起带是在中三叠世末印支运动形成的由SE向NW、由S向N基底拆离的推覆体,它使扬子海相中古生界盆地发生了由强及弱的递进(衰减)变形改造。在江南—雪峰推覆体前缘的冲断层—断弯褶皱带(B带),下古生界地层中形成如通山县半坑、凤凰县水打田、阿拉营、慈利县南山坪、麻江等一系列裂隙—背斜型(沥青)古油藏。在逆掩断层—断展褶皱带(C带),上古生界地层中形成赤壁市北门岔、慈利县苗市等断展背斜型油藏及油苗。通过油源对比分析,这些古油藏(沥青)的形成是在印支—早燕山期接受了中扬子早古生代克拉通周边坳陷的盆地中,斜坡相下寒武统、下志留统及下二叠统烃源岩生成的油气,在向台地方向运移时,聚集在推覆体前缘的"X"形裂隙带及断展背斜中成藏。Abstract: The Jiangnan-Xuefeng uplifted belt is a nappe formed by basement decoupling from southeast to northwest and from south to north at the end of Middle Triassic Indosinian movement.It caused the Middle Palaeozoic marine sedimentary basins to be deformed with the intensity decreasing progressively.A series of palaeo-asphalt oil pool of fracture-anticline type,such as Tongjiang Bankeng,Fenghuang Shuidatian,Alaying,Cili Nanshanping,Majiang,etc.,formed in the overthrust-fault curve folding belt(B zone) in the front of Jiangnan-Xuefeng mountain,in the Lower Palaeozoic.In overthrust fault,i.e.faulted unfurl folding belt(C zone),the oil pools of faulted unfurl anticline type and surface oil formed in the Upper Paleozoic strata in Chibi Beimencha,Cili Miaoshi,etc.Oil-source correlation shows that these palaeo-asphalt oil pools accept the oil from the Lower Camberian,Lower Silurian and Lower Permian slope facies source rock in the Early Palaeozoic cratonic marginal subsidence in Indosinian-Early Yanshan period.They migrate to platform and accumulate in the "X" type fracture belt and compressional anticline in the front of nappe.
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[1] 丘元禧,张渝昌,马文璞等.雪峰山的构造性地质与演化:一个陆内造山带的形成演化模式[M].北京:地质出版社,1999.1～155 [2] 朱夏.试论古全球构造与古生代油气盆地[J].石油与天然气地质,1983,4(1):1～33 [3] 丁道桂,朱樱,陈凤良等.中、下扬子区古生代盆地基底拆离式改造与油气领域[J].石油与天然气地质,1991,12(4):376～385 [4] 丁道桂.鄂西-渝东区膝折构造[J].石油实验地质,2005,27(3):205～210 [5] 孙肇才,郭正吾.中国南方中古生界海相油气勘查研究[M].北京:科学出版社,1993.1～256 [6] 丁道桂,郭彤楼,胡明霞等.论江南-雪峰基底拆离式构造:南方构造问题之一[J].石油实验地质,2007,29(2):120～127,132 [7] 丁道桂,刘光祥.扬子板内递进变形:南方构造问题之二[J].石油实验地质,2007,29(3):238～246,252 [8] 陈能贵,杨斌.中国南方海相地层区烃源岩有机质热演化特征[J].海相油气地质,1999,4(1):1～6 [9] 张义纲.油气运移及其聚集成藏模式[M].南京:河海大学出版社,1997.1～123 [10] 杨斌,贺晓苏,徐云俊等.中国南方下寒武统烃源岩评价与油气资源潜力[J].海相油气地质,1996,1(3):31～38 [11] 郑秀才,郭成贤.中扬子地区下寒武统清虚洞组斜坡带沉积特征及其含油气性[J].湖南地质,1995,14(3):140～144,158 [12] 徐克定.康山"沥青脉"的成因[J].海相油气地质,1997,2(3):54～59 -
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