西南石油大学学报(自然科学版) ›› 2008, Vol. 30 ›› Issue (6): 18-21.DOI: 10.3863/j.issn.1000-2634.2008.06.005

• 地质勘探 • 上一篇    下一篇

开放体系下干酪根生烃动力学研究

张辉1,2 彭平安1   

  1. 1.中国科学院广州地球化学研究所有机地球化学国家重点实验室,广东 广州 510640; 2.中国科学院研究生院,北京 100038
  • 收稿日期:1900-01-01 修回日期:1900-01-01 出版日期:2008-12-20 发布日期:2008-12-20

KINETICS STUDY ON HYDROCARBON GENERATION OF KEROGEN IN OPENSYSTEM

ZHANG Hui1,2 PENG Ping-an1

  

  1.  1.The State key laboratory of Organic Geochemistry,Guangzhou Institute of Geochemistry,Chinese Academy of Sciences,Guangzhou Guangdong 510640,China;2.Graduate School ,Chinese Academy of Sciences,Beijing 100038
  • Received:1900-01-01 Revised:1900-01-01 Online:2008-12-20 Published:2008-12-20

摘要: 以生烃动力学方法对烃源岩进行定量评价是近些年发展起来的一种新方法。通过对Ⅰ、Ⅱ型干酪根在开放体系下的热解模拟实验,研究了Ⅰ、Ⅱ型干酪根热解生烃演化特征,获得了Ⅰ、Ⅱ型干酪根的生烃动力学参数。Ⅰ型干酪根生烃的活化能分布范围为230~276kJ?mol-1;Ⅱ型干酪根活化能分布范围为234~276kJ?mol-1。在此基础上,结合专用Kinetics软件,将此动力学参数应用于实际地质中。结果表明,Ⅰ型干酪根主要生烃期在130~180℃(Ro在0.80%~1.63%);Ⅱ型干酪根主生烃期在141~177℃(Ro在0.92%~1.56%)。生烃动力学方法可较好地将实验数据外推到地质实际过程,在烃源岩评价与勘探中具有广泛的应用价值。

关键词: 开放体系, 干酪根, 模拟实验, 生烃动力学, 主生烃期

Abstract:

Qualitatively evaluating hydrocarbon source rocks by means of hydrocarbon generation dynamics is the latest way developed in recent years.A new method for the

quantitative assessment of source rocks by means of the chemical reaction Kinetics is developed gradually over the recent years.In this paper,the characteristics of

hydrocarbon generation of KerogenⅠandⅡare studied,and the kinetics parameters of hydrocarbon generation are determined and calibrated in opensystem with thermal

simulating experiment.The activate energy values of KerogenⅠandⅡrange from 230 to 276kJ•mol-1 and from 234 to 276kJ•mol-1 respectively.The kinetics

parameters then are extrapolated to geological condition by using the special kinetics software.The result shows that the main hydrocarbongeneration periods for Kerogen

I is from 130℃ to 180℃(Ro between 0.80% and 1.63%),while the main hydrocarbongeneration periods are from 141℃ to 177℃(Ro between 0.92% and 1.56%)for

KerogenⅡ.Kinetics of hydrocarbon generation can make experimental data better extrapolate to geological process,thus there is broad prospective in assessment and

exploration of source rock.

Key words: opensystem, Kerogen, simulating experiment, Kinetics of hydrocarbon generation, main hydrocarbongeneration periods

中图分类号: