| 川西坳陷复合-联合构造及其对油气的控制 |
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| 引用本文： | 李智武,刘树根,陈洪德,孙东,林杰,汤聪.川西坳陷复合-联合构造及其对油气的控制[J].石油勘探与开发,2011,38(5):7-8. |
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| 作者姓名： | 李智武 刘树根 陈洪德 孙东 林杰 汤聪 |
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| 作者单位： | 成都理工大学“油气藏地质及开发工程”国家重点实验室 |
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| 基金项目： | 国家自然科学基金项目（40739901; 40802049）；四川省教育厅自然科学青年基金项目（08ZB062） |
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| 摘 要： | 据不整合和岩相记录及古构造分析,川西坳陷中新生代陆相地层中至少存在11个构造运动界面.受西缘龙门山冲断带、北缘米仓山构造带和西南缘川滇构造带影响,川西坳陷发育北东向、近东西向和近南北向3组主要构造,其中北东向构造在多数构造活动中都有不同程度发育,而近东西向和近南北向构造则分别形成于燕山期和喜马拉雅期.同时,3组构造在多...
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| 关 键 词： | 川西坳陷 构造期次 构造叠加 油气聚集 |
Structural superimposition-and-conjunction and its effects on hydrocarbon accumulation in the Western Sichuan Depression |
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| Li Zhiwu,Liu Shugen,Chen Hongde,Sun Dong,Lin Jie,Tang Cong.Structural superimposition-and-conjunction and its effects on hydrocarbon accumulation in the Western Sichuan Depression[J].Petroleum Exploration and Development,2011,38(5):7-8. |
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| Authors: | Li Zhiwu Liu Shugen Chen Hongde Sun Dong Lin Jie Tang Cong |
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| Affiliation: | Institute of Sedimentary Geology, Chengdu University of Technology, Chengdu 610059, China;Institute of Sedimentary Geology, Chengdu University of Technology, Chengdu 610059, China;Institute of Sedimentary Geology, Chengdu University of Technology, Chengdu 610059, China;Institute of Sedimentary Geology, Chengdu University of Technology, Chengdu 610059, China;Institute of Sedimentary Geology, Chengdu University of Technology, Chengdu 610059, China;Institute of Sedimentary Geology, Chengdu University of Technology, Chengdu 610059, China |
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| Abstract: | Records of unconformities and lithologic facies and analysis of paleo-structure show that at least 11 tectonic boundaries exist in the Meso-Cenozoic continental strata in the Western Sichuan Depression. Affected by the Longmenshan thrust belt on the west side, Micangshan structural belt on the north side and Chuandian structural belt on the southwest side, NE-trending, sub-EW-trending and sub-NS-trending structures were developed correspondingly in the Western Sichuan Depression. The NE-trending structures were developed to different degrees in most tectonic movements, while the sub-EW-trending and sub-NS-trending structures were formed in the Yanshanian and Himalayan, respectively. The three groups of structures were superimposed by one another in multi-stage tectonic movements, producing mainly five types of structural complexes, i.e. coaxial superimposition, orthogonal superimposition, oblique superimposition, multi-direction superimposition and structural conjunction. Structural controls on hydrocarbon accumulation in the Western Sichuan Depression can be expressed as the following three aspects, i.e. timing, locating and modification. Hydrocarbon distribution and the formation of primary gas pools were mostly controlled by early structures (in the Indosinian and Yanshanian), whereas late structures (mainly in the Himalayan) only had modification effects on early gas pools, resulting in structural displacement, reservoir improvement, the destruction of primary gas pools and the formation of secondary oil pools. Accurate reconstruction of the Indosinian-Yanshanian paleo-structures and fracture behaviors during the multi-stage and multi-direction structural superimposition are two important aspects that need to be paid more attention to for the future hydrocarbon exploration in this region. |
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| Keywords: | Western Sichuan Depression tectonic stage structural superimposition hydrocarbon accumulation |
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