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

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,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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