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天然气地球科学

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川北地区大隆组烃源岩地球化学特征与生气潜力初探

陈瑞银，朱光有，周文宝，李伟，胡国艺   

  1. 中国石油勘探开发研究院，北京 100083
  • 收稿日期:2012-08-21 修回日期:2012-09-29 出版日期:2013-02-10 发布日期:2013-02-10
  • 通讯作者: 陈瑞银chenry@petrochina.com.cn. E-mail:chenry@petrochina.com.cn.
  • 作者简介:陈瑞银(1976-)，男，山东泰安人，高级工程师，博士,主要从事生排烃与成藏动力学研究.E-mail:chenry@petrochina.com.cn.
  • 基金资助:

    国家重点基础研究发展计划项目(编号:2007CB209500)；中国石油科技创新基金(编号:2009D50060102)；中国石油勘探开发研究院中青年创新基金(编号:2010-A-26-03)联合资助.

Geochemical Characteristics and Hydrocarbon Resource Potential of Dalong Formation Permian，Northeast Sichuan

CHEN Rui-yin，ZHU Guang-you，ZHOU Wen-bao，LI Wei，HU Guo-yi   

  1. Research Institute of Petroleum Exploration and Development, PetroChina, Beijing 100083
  • Received:2012-08-21 Revised:2012-09-29 Online:2013-02-10 Published:2013-02-10

PDF (PC)

597

摘要：

岩石化学、有机地球化学和地质证据表明，四川盆地川北地区二叠系顶部发育一套富含Ⅱ型有机质的硅质岩段，厚度约为30m，有机碳含量均值为4.08%，热解生烃潜力均值为12.55mg/g，等效镜质体反射率值为1.2%~2.0%，是一套长期被忽视,但应该被充分重视的气源岩层段。根据排出和滞留于烃源岩的液态烃裂解成气两端元条件下的热成熟度与产烃率关系，计算平均生油强度为(17.6~22.3)×104t/km2 ，平均生气强度为(1.65~1.98)×108m3/km,总体评价为一套优质气源岩层段，生气潜力值得高度重视。

关键词: 大隆组, 硅质岩, 元素分析, 生烃热模拟实验, 资源潜力, 川北地区

Abstract:

The data of rock element and organic geochemistry confirm that a set of organic rich siliceous marine formation is distributed at the top of Permian in the northeast of Sichuan basin, whose thickness is 30 meters, and the sedimentary facies belongs to platform depression.The formation had type Ⅱ organic matter feature and the mean TOC  and potential hydrocarbon ratio is 4.08% and 12.55mg/g, respectively, and the RO is 1.2%-2.0%.Thus, this formation can be cognized as excellent source sediment formation with oil yields（17.6-22.3）×104t/km2 and gas yields （1.65-1.98）×108m3/km2.Much more exploration attention should be paid to it. 

 

Key words: Dalong Formation, Siliceous rock, Element analysis, Pyrolysis, Resource potential, Northeast of Sichuan basin

中图分类号: 

  • TE122.1+13

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