SCREENED TRAPS DEVELOPED ON THE FOOTWALL OF OVERTHRUST IN THE TARIM BASIN
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摘要: 塔里木盆地长期处于挤压背景,由此引起的逆冲(掩)断层和断层遮挡圈闭发育。在盆地的演化历史中,早二叠世末的晚海西运动和渐新世末的喜马拉雅运动形成了两个世代的逆冲-逆掩断裂系统。这两期构造也是油气的主要成藏期。逆冲断层遮挡圈闭是逆冲断层形成过程中或形成后的次级应力所形成,上、下盘属两个不同的变形范畴,上盘属外来体,而下盘属相对原地体。因此,逆冲断层下盘遮挡圈闭更有利于油气保存。Abstract: There are a lot of overthrusts and screened traps developed on footwall of the overthrusts in the Tarim basin as a result of its long existence of compressional stress in the area.Two regimes of overthrust systems were formed during the Hercynian movement in the end of Early Permian and the Himalayan movement in the end of Oligocene respectively.Main hydrocarbon accumulation was happened during the two tectonic movements.The screened traps developed on footwall of overthrust were formed by secondary stress that was formed during the syn-thrusting or post-thrusting.Two walls of an overthrust showed different deformation with the hanging wall belong to allochthonous block and the footwall relatively unmoved and more or less is in situ.Therefore,traps on the foot wall of thrust are more favourable for hydrocarbon preservation.
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Key words:
- overthrust /
- screened traps /
- footwall of thrust /
- hydrocarbon accumulation /
- Tarim Basin
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[1] 丁道桂,汤良杰.塔里木盆地形成与演化[M].南京:河海大学出版社,1996 [2] 丁道桂.基底拆离作用与含油气盆地的改造——以塔里木盆地构造分析为例[J].石油实验地质,1990,12(增):17～21 [3] 丁道桂,刘伟新,崔可锐等.塔里木中新生代前陆盆地构造分析与油气领域[J].石油实验地质,1997,19(2):97～107 [4] 汤良杰.塔里木盆地多层次滑脱构造与含油气远景探讨[J].地质学报,1992 [5] 杨克绳.从中国沉积盆地结构看塔里木盆地找油方向[J].石油实验地质,1994,16(3):243～249 [6] 董秀芳,伍泓.按封闭机理划分塔里木盆地的圈闭类型[J].石油实验地质,1995,17(3):229～237 [7] 段铁军,徐宏节,伍泓等.塔里木盆地与断裂作用有关的圈闭类型特征[J].石油实验地质,1998,20(3):217～222 [8] 高长林,叶德潦,张玉箴等.塔里木中新生代盆地扩张和盆地俯冲与地幔柱[J].石油实验地质,2003,25(6):661～669 [9] 龚铭,邵鸿良,王泽厚等.塔里木盆地断裂世代初探[J].石油实验地质1995,17(2):105～113 [10] 范小林.塔里木盆地潜在的油气区带:构造楔[J].石油实验地质,1996,18(2):146～154 [11] 杨福忠,张恺.塔里木盆地北缘构造演化及其含油气远景[J].石油实验地质1991,13(2):143～151 [12] 汤良杰.塔里木盆地北部背冲断块构造与油气聚集[J].石油实验地质,1989,11(4):320～330 [13] 黄泽光,刘光祥,潘文蕾等.塔里木盆地塔西南与库车坳陷形变特征的对比分析[J].石油实验地质,2002,24(6):701～707 [14] 胡望水,刘学锋,陈毓遂等.塔里木西南坳陷新生代构造演化与油气的关系[J].石油实验地质,1996,18(3):244～251 -
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