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天然气地球科学

• 天然气地质学 • 上一篇    下一篇

渤海湾盆地沾化凹陷断层活动与新近系油气成藏关系

刘培，蒋有录，刘华，熊伟，李克成，朱荣伟   

  1. (1.中国石油大学（华东）地球科学与技术学院,山东 青岛 266580； 2.中国石化胜利油田地质科学研究院，山东 东营 257015
  • 收稿日期:2012-08-06 修回日期:2012-09-14 出版日期:2013-06-10 发布日期:2013-06-10
  • 通讯作者: 刘培upcliupei@126.com. E-mail:upcliupei@126.com.
  • 作者简介:刘培(1986-)，男，四川内江人,硕士研究生,主要从事油气成藏机理与分布规律研究.E-mail：upcliupei@126.com.
  • 基金资助:

    国家油气重大专项课题（编号：2011ZX05006-003）；山东省自然科学基金（编号：ZR2011DL009）联合资助.

The Relationship between Fault-activity and Hydrocarbon Accumulation of Neogene in Zhanhua Depression，Bohai Bay Basin

LIU Pei，JIANG You-lu，LIU Hua，XIONG Wei，LI Ke-cheng，ZHU Rong-wei   

  1. 1.School of Geosciences,China University of Petroleum (East China),Qingdao 266580,China；
    2.Research Institute of Geological Sciences,Shengli Oilfield Company,SINOPEC,Dongying 257015,China
  • Received:2012-08-06 Revised:2012-09-14 Online:2013-06-10 Published:2013-06-10

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摘要： 通过对沾化凹陷断层平剖面样式及其活动性、油气成藏期及新近系油气分布规律等方面的研究，探讨了断层活动与新近系油气成藏的关系。结果表明，研究区断层活动强度具有在沙三段沉积期前“西强东弱”、沙三段沉积期后“东强西弱”的特点，且北东向及近东西向断层活动时间与油气充注期匹配性好。控烃期和控运期是断层活动影响油气成藏的2个关键时期，其中控烃期断层活动为油气成藏提供良好的物质基础，控运期断层活动为油气输导提供优越的通道条件；根据控烃期和控运期断层活动速率，将研究区主要断层的控油级别分为Ⅰ级、Ⅱ级、Ⅲ级，其中Ⅰ级、Ⅱ级断层控制的披覆构造带新近系油气较为富集，断层控油级别决定新近系油气富集程度。

关键词: 断层活动, 油气成藏, 渤海湾盆地, 沾化凹陷, 新近系

Abstract:

Based on the study of the plannar and profile styles of faults and their activity,the pool forming stage and the hydrocarbon distribution of Neogene,the relationship between fault activity and Neogene reservoir formation in Zhanhua Depression was discussed.The results show that the intensity of fault activity in the study area has a prominent feature of “strong in the west but weak in the east” before the deposition of  Es3 ,while it has a contrary feature after the deposition of Es3,and the active phase of the NE trending and nearly EW trending faults matches well with the hydrocarbon filling periods.The periods when fault controls hydrocarbon and when fault controls migration are the two key stages which demonstrate the influence of fault activity on hydrocarbon accumulation.When fault controls hydrocarbon,fault activity provides good material basis for oil and gas accumulation while when fault controls migration,fault activity provides efficient migration pathways for the transportation of hydrocarbon.According to the activity velocity of fault during the two stages,the faults controlling the distribution of petroleum were divided into three degrees named Ⅰ,Ⅱ and Ⅲ.The degree Ⅰ and degree Ⅱ faults lead to richer accumulation of Neogene hydrocarbon in drape structural belt,and the degree of the control of fault on oil determines the petroleum richness of Neogene.

Key words: Fault activity, Hydrocarbon accumulation, Bohai Bay Basin, Zhanhua Depression, Neogene

中图分类号: 

  • TE121.3
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