| 对孤岛油田西南缘断层活动性的新认识 |
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| 引用本文： | 渠芳,;陈清华.对孤岛油田西南缘断层活动性的新认识[J].西安地质学院学报,2009(4):394-399. |
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| 作者姓名： | 渠芳 ;陈清华 |
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| 作者单位： | [1]西南石油大学资源与环境学院,四川成都610500; [2]中国石油大学地球资源与信息学院,山东东营257061 |
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| 基金项目： | 国家自然科学基金项目（49972037）;十五国家科技攻关项目（2001GA605A-11） |
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| 摘 要： | 针对孤岛油田西南缘断层复杂、形成时期上认识模糊的问题，通过重新制定适合孤岛地区的断层分级原则，落实了研究区的断层级别和各级断层的展布规律，并通过断层活动速率法详细研究了主干生长断层的活动期次及发育特点。结果表明，主干生长断层新生代的活动性主要表现为由Es4-E82＋3-Es1逐渐减小的特点，Ed沉积期受东营运动影响多数活动性有所增强；Ng沉积期活动性普遍微弱。在后期的新构造运动影响下，早期活动的油源断层开始复活，重新具有活动性，并在新近系地层中产生大量新生活动断层。由此才促使研究区浅部地层在中新世末主排烃期能够聚集大量油气，这也是构成孤岛油田西南缘油气聚集的关键因素。
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| 关 键 词： | 断层活动性 新构造运动期 主干断层 油气聚集 主排烃期 |
New Recognitions About Southwestern Margin Fault Activity of the of Gudao Oilfield |
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| Institution: | QU Fang ,CHEN Qing-hua (1. School of Resources and Environment, Southwest Petroleum University, Chengdu 610500, Sichuan, China; 2. School of Geo-resources and Information, China University of Petroleum, Dongying 257061, Shandong, China) |
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| Abstract: | Aiming at solving the problems of the complicated faults and its ambiguous formation period, through re-establishing principle of fault grade classification, the grade and distribution of faults in the research area are recognized, and the active stages and development characteristics of the main faults are researched according to calculate the rate of fault activity. The results show that the activities of the faults in Cenozoic era decreased gradually in the order of Es4-Es2＋3-Es1 , then increased in Ed sedimentary period due to the Dongying tectonic movement, and only with slight activities at Guantao period. However, the source faults which were active in early stages revived again during the later Neotectonics and generated large number of new faults in Guantao formation. Thus, the shallow part can accumulate large quantity of hydrocarbon in the main hydrocarbon expulsion phase, which is the key factor for the migration and accumulation of hydrocarbon in the research area. |
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| Keywords: | fault activity Neotectonics main growth fault hydrocarbon accumulation main hydrocarbon expulsion phase |
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