石油与天然气地质 ›› 2008, Vol. 29 ›› Issue (3): 312-319.doi: 10.11743/ogg20080305

• 油气地质 • 上一篇    下一篇

渤海湾盆地中南部上古生界生烃史与天然气勘探前景

胡宗全1, 朱建辉2, 周新科1, 王传刚1, 张玉兰1   

  1. 1. 中国石油化工股份有限公司, 石油勘探开发研究院, 北京, 100083;
    2. 中国石油化工股份有限公司, 石油勘探开发研究院, 无锡石油地质研究所, 江苏, 无锡, 214151
  • 收稿日期:2006-12-28 出版日期:2008-06-24 发布日期:2012-01-16
  • 基金资助:

    中国石油化工股份有限公司科技发展部项目(P03076).

Hydrocarbon generating history and exploration prospects of the Upper Paleozoic in the central and south Bohai Bay Basin

Hu Zongquan1, Zhu Jianhui2, Zhou Xinke1, Wang Chuangang1, Zhang Yulan1   

  1. 1. Research Institute of Exploration & Production, SINOPEC, Beijing 100083, China;
    2. Wuxi Branch of Petroleum Geology, Research Institute of Exploration & Production, SINOPEC, Wuxi, Jiangsu 214151, China
  • Received:2006-12-28 Online:2008-06-24 Published:2012-01-16

摘要:

渤海湾盆地古生界含油气系统以上古生界煤系为主力烃源岩。该套烃源岩经历了复杂的埋藏史、热史和生烃史,具有多期次的生烃过程。该地区上古生界含油气系统具晚期成藏特征,只有与古近纪以来有效成藏期相匹配的晚期生烃才具有现实的资源意义。通过建立上古生界烃源岩的生烃史地质模型,划分了3种生烃史类型。以东濮凹陷为代表的"燕山期抬升、喜马拉雅期强追加"最有利于晚期二次生烃;以东营凹陷为代表的"燕山期弱追加、喜马拉雅期强追加"也具有较大的晚期生烃潜力;以莘县凹陷为代表的"燕山期较强追加、喜马拉雅期较弱追加"晚期生烃潜力有限。通过生烃史数值模拟,预测了不同阶段的生烃强度。济阳坳陷在新生代生烃量占其总生烃量的60%;临清坳陷在新生代生烃量占其总生烃量的14%;东濮凹陷在新生代生烃量占其总生烃量的90%。生烃史模拟预测了侏罗纪—白垩纪和新生代生烃强度的平面分布,在此基础上预测了渤海湾盆地中南部地区上古生界的天然气资源前景和有利勘探方向。

关键词: 二次生烃, 数值模拟, 生烃史, 上古生界, 渤海湾盆地

Abstract:

The Upper Paleozoic coal-bearing formation in Bohai Bay Basin is the major source rock in the Paleozoic strata.It had experienced complicated history of bury,thermal maturation and hydrocarbon generation of multiple episodes.The petroleum system in the Upper Paleozoic of the areas features in late reservoiring and it is only meaningful when it happened in effective reservoiring period with later hydrocarbon generation.Three types of hydrocarbon generating history are classified by establishing the geologic model of hydrocarbon generation in the Upper Paleozoic.The areas such as Dongpu sag with a burial history of uplifting in Yanshanian period and deep burial in Yanshanian period are the most potential for secondary hydrocarbon generation,the areas such as Dongying sag with a burial history of shallow burial in Yanshanian period but deep burial in Himalayanian period have relatively large potential of secondary hydrocarbon generation,while the areas such as Shenxian sag expe-rienced relatively deep burial in Yanshanian period and relatively shallow burial in Yanshanian period have limi-ted potential of secondary hydrocarbon generation.Numerical simulation is carried out to evaluate the hydrocarbon generating intensity at different stages.It reveals that the quantity of hydrocarbons generated in Cenozoic accounts for 60% of the total in Jiyang depression,14% in Linqing depression,as high as 90% in Dongpu sag is.Simulation of hydrocarbon generation history indicates the plane distribution of hydrocarbon generating intensity in Jurassic-Cretaceous and Cenozoic,and the resource potential and exploration targets of the Upper Paleozoic natural gas in Bohai Bay Basin.

Key words: secondary hydrocarbon generation, numerical simulation, hydrocarbon generating history, Upper Paleozoic, Bohai Bay Basin

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