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 • Previous Articles     Next Articles

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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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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