天然气地球科学

• 天然气地质学 • 上一篇    下一篇

鄂尔多斯盆地马家沟组烃源岩有效排烃有机质丰度下限探讨——以龙探1井为例

陈义才1,杨知敏1,王思航1,郑海桥1,童小俊1,胡润1,任军峰2,包洪平2   

  1. 1.成都理工大学,四川 成都 610059;2.长庆石油勘探局,陕西 西安 710001
  • 收稿日期:2014-01-02 修回日期:2014-03-28 出版日期:2014-11-10 发布日期:2014-11-10
  • 作者简介:陈义才(1963-),男,四川彭州人,副教授,博士,主要从事油气藏地质研究.E-mail:cdlgcyc@126.com.
  • 基金资助:
    中国地调局资源部项目(编号:1212011220757)资助.

Discussion on the Lower Limit of Organic Abundance of Effective Hydrocarbon Expulsion for the Source Rock from Majiagou Formation in Ordos Basin: Taking the Well Longtan 1 as an Example

CHEN Yi-cai1,YANG Zhi-min1,WANG Si-hang1,ZHENG Hai-qiao1,TONG Xiao-jun1,HU Run1,REN Jun-feng2,BAO Hong-ping2   

  1. 1.Chengdu University of Technology,Chengdu 610059,China;
    2.Changqing Bureau of Petroleum Exploration,Xi′an 710001,China
  • Received:2014-01-02 Revised:2014-03-28 Online:2014-11-10 Published:2014-11-10

摘要: 烃源岩残余有机碳含量下限值是划分有效烃源岩的重要指标之一。目前关于碳酸盐岩有效烃源岩有机碳含量下限值主要由经验分析来确定,取值高低存在比较大的分歧。鄂尔多斯盆地马家沟组碳酸盐岩热演化程度高、有机质类型好。笔者针对马家沟组烃源岩生成油气具有近距离运聚的成藏特征,从烃源岩吸附气定量分析出发,结合典型井不同有机碳含量的烃源岩排烃史模拟计算,综合分析认为以0.25%作为高成熟—过成熟碳酸盐岩有效排烃的烃源岩残余有机碳含量下限值。

关键词: 碳酸盐岩烃源岩, 有机碳含量下限值, 排烃史, 马家沟组, 鄂尔多斯盆地

Abstract: The lower limit of residual organic carbon is an important indicator to determine effective source rocks.At present,the lower limit of organic carbon content of effective carbonate source rock is mainly determined by empirical analysis and great differences exist.The carbonate of Majiagou Formation in Ordos Basin has high thermal maturity and good organic matter.According to the feature that the hydrocarbon generated by the source rock of Majiagou Formation migrated and accumulated in short distance,based on the quantitative analyses of source rock absorbed gas,combined with the simulated calculation of hydrocarbon expulsion of source rocks with different level of organic matter from typical wells,it is concluded that the lower limit of residual organic matter is 0.25% for the effective hydrocarbon expulsion of high-over mature carbonates.

Key words: Carbonate source rocks, Lower limit values of organic carbon content, Hydrocarbon expulsion history, Majiagou Formation, Ordos Basin

中图分类号: 

  • TE122.1+12

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