新疆石油地质

新疆石油地质 ›› 2007, Vol. 28 ›› Issue (3): 307-311.

• 油气勘探 • 上一篇    下一篇

济阳坳陷早古生代层序划分与石油地质条件

谭俊敏1,2, 李明娟1   

  1. 1.中国石化 石油勘探开发科学研究院, 北京 100083;
    2.中国石油大学 石油天然气工程学院, 北京 102200
  • 收稿日期:2006-04-21 修回日期:2006-09-15 出版日期:2007-06-01 发布日期:2020-07-31
  • 作者简介:谭俊敏(1964-), 女, 山东潍坊人, 博士, 地球物理与石油地质,(Tel) 010-82312038(E-mail) tanjm@pepris.com.
  • 基金资助:
    中国石油化工集团油田事业部先导项目, 环渤海湾盆地前第三系油气资源评价(P02087)资助

The Sequence Stratigraphic Division and Petroleum Geologic Condition of Lower Paleozoic in Jiyang Depression

TAN Jun-min1,2, LI Ming-juan1   

  1. 1. Research Institute of Petroleum Exploration and Development, Sinopec, Beijing 100083, China;
    2. College of Oil and Gas Engineering, China University of Petroleum, Beijing 102200, China
  • Received:2006-04-21 Revised:2006-09-15 Online:2007-06-01 Published:2020-07-31

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摘要： 济阳坳陷下古生界整体表现为两大基准面旋回,即寒武系馒头组至奥陶系冶里-亮甲山组和奥陶系下马家沟组至八陡组,两大旋回对应2个超层序8个层序,每个层序均由海侵体系域和高位体系域组成。生储盖配置关系研究表明,超层序A烃源岩总体不发育,而其顶部亮甲山组白云岩是重要的潜山油气藏储集层;超层序B顶部的风化壳发育多期岩溶作用,储集层条件优越,是潜山油气藏的主要储集层,马家沟组沉积期的泥灰岩和厚层灰岩有机质含量较高,是潜在的烃源岩。该区上古生界下部的厚层暗色泥岩是一套优质的区域性盖层,与下伏的寒武系和奥陶系可构成优越的生储盖组合,对形成原生油气藏十分有利。

关键词: 济阳坳陷, 早古生代, 地层层序, 油气勘探, 油气远景

Abstract: The Lower Paleozoic in Jiyang depression could be divided into two supper sequences (Sequence A and Sequence B) or two big datum-level cycles which were Cambrian Mantou group to Ordovician Yeli-Liangjiashang group and Ordovician Lower Majiagou group to Badou group. They correspond to eight sequences that are made up of transgressive system tract and high system tract for each one. The assembled relations among source-reservoir-cap rocks show that the source rocks in Sequence A are not developed as a whole, but the dolomite of its Liangjiashan group is an important buried hill reservoir rock. The multi-stage karstifications are found in the weathering crust in top of Sequence B, with superior reservoir condition, and can be as major reservoir rock in the buried hill reservoir. The argillaceous limestone and thick limestone of Majiagou group should be as potential source rocks for the reason of higher content of organic matter. The thick dark mudstone beneath the Upper Paleozoic acts as a preferable regional cap formation, forming a good sourcereservoir-cap rock assemblage along with underlying Cambrian and Ordovician systems. These are the favorable conditions for shaping original oil-gas reservoirs in this area.

Key words: Jiyang depression, Lower Paleozoic, sequence stratigraphy, petroleum exploration, hydrocarbon prospect

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