西南石油大学学报(自然科学版) ›› 2009, Vol. 31 ›› Issue (1): 9-13.DOI: 10.3863/j.issn.1674-5086.2009.01.003

• 地质勘探 • 上一篇    下一篇

塔里木盆地煤系烃源岩产气率变化特征

肖芝华1a,1b 胡国艺2 钟宁宁1a,1b 李志生2   

  1. 1.中国石油大学:a.资源与信息学院，b.油气资源与探测国家重点实验室,北京 昌平 102249;2.中国石油勘探开发研究院廊坊分院,河北 廊坊 065007
  • 收稿日期:1900-01-01 修回日期:1900-01-01 出版日期:2009-02-20 发布日期:2009-02-20

THE CHANGING CHARACTERISTICS OF HYDROCARBON GENERATION RATE OF COAL-MEAS-URE SOURCE ROCKS IN TARIM BASIN

XIAO Zhi-hua1a，1b HU Guo-yi2 ZHONG Ning-ning1a，1b LI Zhi-sheng2

  

  1. 1.China University of Petroleum：a.Resource and Information School，b.Key Laboratory for Hydrocarbon Accumulation Mechanism，Ministry of Education，Changping Beijing 102249，China；2.Langfang Branch of Research Institute of Petroleum Exploration and Development，Langfang Hebei 065007，China
  • Received:1900-01-01 Revised:1900-01-01 Online:2009-02-20 Published:2009-02-20

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摘要：

采用开放体系下进行的全岩热模拟实验，对塔里木盆地侏罗系的煤系烃源岩开展了产气率变化特征的研究。模拟实验结果表明：在Ro低于1.0%或1.2％时，煤型烃源岩产气率非常低，一般不到总产气量的5%~10%，有时甚至更低，煤型烃源岩大量产气阶段一般始于Ro为1.2％，在2.2％或2.4%之前这段演化期间产气量很大，一般占总产气量的85%以上，但在Ro等于2.2%或2.4%之后，煤型烃源岩产气量很低，一般不足5%~10%。煤系泥岩累计产气率为179m3/t·TOC，在Ro为2.4%之后，产气率降低很快，接近生烃死亡线。

关键词: 开放体系, 热模拟, 产气率, 煤系烃源岩, 塔里木盆地

Abstract:

By means of thermal simulating experiment in the open system,the authors of this paper study the hydrocarbon generation characteristic of Jurassic coal-measure source rocks in Tarim Basin.The result of experiment indicate that hydrocarbon generation of coal source rock is very low when the value of Ro is below 1.0% or 1.2％，it cannot reach to 5%～10% of the total gas yield，even more lower.The period of large quantity of generation ordinary begins at the value of Ro equal to 1.2％,the gas yield is very high（bove 85％ of the total gas yield） in this evolution period the value of Ro is below 2.2% or 2.4％，while the value of Ro is above 2.2% or 2.4％，the gas yield of coal source rock is very low（below 5％~10% of the total gas yield）.According to the result of experiment,the accumulative hydrocarbon generation of coal mudstone is 179m3/t·TOC，when the value of Ro is exceed 2.4％,the hydrocarbon generation decrease very fast,which close to the threshold of hydrocarbon generation.

Key words: open system, thermal simulation, hydrocarbon generation rate, coalmeasure source rock, Tarim Basin

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