石油与天然气地质 ›› 2023, Vol. 44 ›› Issue (5): 1300-1307.doi: 10.11743/ogg20230518

• 方法技术 • 上一篇    下一篇

断裂诱发砂体输导油气变径部位预测方法及其应用

何春波1(), 张亚雄2, 于英华1(), 袁红旗1   

  1. 1.东北石油大学 地球科学学院,黑龙江 大庆 163318
    2.中国石化 石油勘探开发研究院,北京 102206
  • 收稿日期:2023-02-07 修回日期:2023-08-02 出版日期:2023-10-19 发布日期:2023-10-19
  • 通讯作者: 于英华 E-mail:hechunbo@nepu.edu.cn;42530546@qq.com
  • 第一作者简介:何春波(1980—),男,博士、讲师,盆地构造分析。E-mail:hechunbo@nepu.edu.cn
  • 基金项目:
    国家自然科学基金项目(41572126);黑龙江省自然科学基金项目(LH2022D013);黑龙江省中央支持地方高校青年骨干人才项目(14011202101);黑龙江省重点研发计划项目(JD22A022)

A method for predicting fault-induced changes of hydrocarbon migration pathways along sand carrier beds and its application

Chunbo HE1(), Yaxiong ZHANG2, Yinghua YU1(), Hongqi YUAN1   

  1. 1.School of Earth Sciences,Northeast Petroleum University,Daqing,Heilongjiang 163318,China
    2.Petroleum Exploration and Production Research Institute,SINOPEC,Beijing 102206,China
  • Received:2023-02-07 Revised:2023-08-02 Online:2023-10-19 Published:2023-10-19
  • Contact: Yinghua YU E-mail:hechunbo@nepu.edu.cn;42530546@qq.com

摘要:

为了揭示含油气盆地斜坡区浅层油气分布规律,研究了断裂在改变砂体输导油气运移路径方面的作用。通过将盖层渗漏部位、断裂输导油气优势运移路径和砂体输导油气优势运移路径三者叠合,建立了一套预测断裂诱发砂体输导油气运移路径变化(变径)部位的方法,并将其应用于渤海湾盆地歧口凹陷,预测赵北断裂诱发沙河街组一段下亚段(沙一下亚段)砂体输导的油气变径进入浅层馆陶组的部位。结果表明:赵北断裂诱发的变径部位仅有1处,分布在沙一下亚段的中部,沙一下亚段砂体输导的油气在此处变径沿赵北断裂运移至上覆的浅层馆陶组中汇聚成藏。这一预测结果与赵北断裂附近浅层馆陶组已发现油气主要分布在中部相吻合,表明该方法用于预测断裂诱发砂体输导油气变径部位是可行的。

关键词: 砂体输导油气, 变径部位, 预测方法, 断裂, 油气运移, 歧口凹陷, 渤海湾盆地

Abstract:

To reveal the distribution patterns of shallow hydrocarbons in slope zones of petroliferous basins, we explore the role of faults in changing the pathways for hydrocarbon migration along sand carrier beds, as well as the exact change. By matching the hydrocarbon leakage location of the cap rock with the dominant migration pathway along faults and sand carrier beds, we establish a method for predicting the fault-induced changes of hydrocarbon migration pathways along the sand carrier beds. By applying this method to the Qikou Sag in the Bohai Bay Basin, we predict the Zhaobei fault-induced change of pathways for hydrocarbon migration along the sand carrier beds in the lower submember of the 1st member of the Shahejie Formation where hydrocarbons migrate into the shallow Guantao Formation. The results indicate only one change in the migration pathways induced by the Zhaobei fault, lying in the middle of the lower submember of the 1st member of the Shahejie Formation. In this part, hydrocarbons migrating via the sand carrier beds in the lower submember migrate upward along the Zhaobei fault and accumulate in the overlying shallow Guantao Formation. This prediction result aligns with the fact that hydrocarbons found in the shallow Guantao Formation near the Zhaobei fault are predominantly distributed in the middle of the lower submember. Therefore, the method proposed in this study is feasible in predicting fault-induced changes of the hydrocarbon migration pathways along the sand carrier beds.

Key words: hydrocarbon migration along sand carrier bed, change of hydrocarbon migration pathway, prediction method, fault, hydrocarbon migration, Qikou Sag, Bohai Bay Basin

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