天然气地球科学 ›› 2008, Vol. 19 ›› Issue (05): 587–592.doi: 10.11764/j.issn.1672-1926.2008.05.587

• 天然气地质学 • 上一篇    下一篇

渤海湾盆地东营凹陷胜坨地区油气运聚与成藏研究

周建林   

  1. (中国石油大学(北京),北京 102249)
  • 收稿日期:2008-04-08 修回日期:2008-08-08 出版日期:2008-10-10 发布日期:2008-10-10

Migration and Accumulation of Oil-Gas in Shengtuo Areasof Dongying Depression, Bohai Bay Basin

ZHOU Jian-lin   

  1. (China University of Petroleum (Beijing), Beijing 102249, China)
  • Received:2008-04-08 Revised:2008-08-08 Online:2008-10-10 Published:2008-10-10

摘要:

通过对渤海湾盆地济阳坳陷东营凹陷胜坨地区勘探成果和地质资料进行系统综合分析,并应用油气地质新理论和新方法,研究了该区构造演化史、沉积史与油气运移的有机联系,发现主干边界断层及其上盘主要同向调节断层的相对陡倾斜部位,往往是构造岩性圈闭相对发育的部位,而相对缓倾斜部位多是构造圈闭相对发育的部位;砂体展布及物性特征对油气运移与储集有着重要控制作用,沙二段和沙三段的砂体厚度大、分布范围广,并且直接与烃源岩相接触,是良好的油气运移通道或聚集场所,而沙四段厚砂体基本上都分布在凹陷的边缘,但是也与烃源岩相接触,也是油气运移的通道和场所;研究区水下扇及浊积扇砂体本身就处在生油岩的包围之中,因上下被生油岩夹持,油气可以直接进入砂岩体成藏;生油洼陷深部的超压环境为油气运移提供了充足的动力,油气生成后在油源断层、优质砂体以及不整合面组成的输导系统内分别向浅部和侧向运移形成各类油气藏,运移过程中又受次级断层和层内砂岩非均质性的影响,使其运移路径复杂化。

关键词: 圈闭模式, 运移通道, 水下扇及浊积扇, 隐蔽油气藏

Abstract:

Based on new theories and methods of petroleum geology, the relationship between tectonics and sedimentary history was researched using comprehensive exploration achievements and geological data. Most structural lithologic traps were found in the relatively steep slope positions of the hanging wall of the principle boundary faults and its major co\|rotating adjustment faults, while most structural traps were found in the relatively slow slope positions. The control of sand body distribution and physical property characteristics on oil\|gas migration and accumulation are very important. The sandbodies in Es2 and Es3 which were so thick and widely spread, contacting directly with the hydrocarbon source rocks in the sag, were great oil\|gas migration channels and traps; the thick sandbodies in Es4 which were also contacting with hydrocarbon source rocks, were also the oil\|gas migration channels and traps, though they were basically distributed at the edge of the depression. The subaqueous fan and turbidite fan in the area were surrounded by oil source rocks, so oil and gas could enter the sandbodies directly. The main power for oil\|gas migration was from overpressure environment in the deep sag. After generation, oil and gas migrated to shallow and lateral parts in the conducting system composed by oil source faults, reservoir sandbodies and unconformity surface, thus various reservoirs were formed. During migration, pathways were complicated because of secondary faults and heterogeneity of sandstones.

Key words: Trap pattern, Migration channel, Subaqueous fan, Turbidite fan, Subtle reservoirs.

中图分类号: 

  • TE122.1+2

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