新疆石油地质

新疆石油地质 ›› 2008, Vol. 29 ›› Issue (2): 170-171.

• 油气勘探 • 上一篇    下一篇

油气沿断裂向下幕式运移的机理

罗群1, 宋子学2   

  1. 1.中国石油大学盆地与油藏研究中心, 北京, 102200;
    2.中国石油大庆油田有限责任公司勘探开发研究院, 黑龙江大庆, 163712
  • 收稿日期:2007-06-11 发布日期:2020-08-17
  • 作者简介:罗群(1963-), 男, 四川乐山人, 副教授, 博士, 石油数学地质,(Tel)010-69743979(E-mail)luoqun2002@263.net.

Mechanism of Episode Petroleum Migration Along Faults Down

LUO Qun1, SONG Zi-xue2   

  1. 1. Research Center of Basin and Reservoir, China University of Petroleum, Beijing 102200, China;
    2. Research Institute of Exploration and Development, Daqing Oilfield Company Ltd., PetroChina, Daqing, Heilongjiang 163712, China
  • Received:2007-06-11 Published:2020-08-17

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摘要： 通过分析松辽盆地北部扶扬油层断裂活动与油气运聚成藏特征, 认为扶扬油层油气藏的形成不能简单地用“断裂超压倒灌机理模式”来解释, 青山口组烃源岩排出的成熟油气能够沿断裂向下长距离倒灌运移的主要原因是超压的间歇释放, 即泄压区断裂不断活动而形成的泄压区流体流失和压力降低, 是导致憋压区流体长距离沿断裂向下倒灌至泄压区的根本原因和动力机制;“超压间歇释放断裂幕式倒灌成藏机理模式”不仅解释了断裂在上覆超压下运载油气向下运移的机理, 而且为油气沿断裂向下长距离“倒灌”运移提供了理论依据, 同时也为在超压发育区下伏地层及其深层油气勘探提供了思路。

关键词: 松辽盆地, 超压, 油气运移, 断裂活动, 机理, 扶扬油层

Abstract: The analysis of fault activity and hydrocarbon migration and accumulation in Fuyang reservoir in northern Songliao basin suggests that this reservoir could not be explained simply by overpressure allowing hydrocarbon to migrate down along faults rather than by the model of intermittent overpressure releasing along faults and episodic counterflow/accumulation, which is the main reason of mature hydrocarbon from Qinshankou source rock migrating down along faults for a long distance. Such a model can not only explain that it is the fault that carried the oil and gas migrating down in condition of overpressure, but also provides theoretic basis for petroleum long-distance counterflow migrating down along faults. Also, it is pointed out that the underlying strata and the deep strata with overpressure in this area are favourable for petroleum exploration.

Key words: Songliao basin, overpressure, petroleum migrating down, fault activity, mechanism, Fuyang reservoir

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