Kinetics of Hydrocarbon Generation for Jurassic Source Rocks and Application in Northern Qaidam Basin:Take Saishenteng Depression as an Example

Xing Lan-tian,Zhang Xiao-bao,Zhang Rui.Xu Li,Li Wei

doi:10.11764/j.issn.1672-1926.2012.01.161

2012 , Vol. 23 >Issue 1: 161 - 166

DOI: https://doi.org/10.11764/j.issn.1672-1926.2012.01.161

Kinetics of Hydrocarbon Generation for Jurassic Source Rocks and Application in Northern Qaidam Basin:Take Saishenteng Depression as an Example

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1.Key Laboratory of Petroleum Resources Research,Institute of Geology and Geophysics,CAS,Lanzhou 730000,China;
2.Graduate University of Chinese Academy of Sciences,Beijing 100049,China；
3.Liaoning Technical University,Fuxin 123000,China

Received date: 2011-11-21

Revised date: 2011-12-27

Online published: 2012-02-10

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Abstract

A pyrolysis experiment of gas generation of source rock sampling from Qaidam basin was carried out with a high pressure and closed gold tube reaction system.The kinetic parameters of gaseous hydrocarbon generation were also obtained.The results show that activation energy of CH₄ ranges from 49kcal/mol to 67kcal/mol with two peaks of 57kcal/mol and 66kcal/mol in a diagram of activation energy distribution if its frequency factor of1×10¹²/sis assumed.C_1-5activation energy ranges from 52kcal/mol to 66kcal/mol with a unique peak of 59kcal/mol in the diagram and its frequency factor of 1.10×10¹⁵/s.Based on gas generation history simulated by kinetics software and two artificial simulation wells at the centre of Saishenteng depression and its slope,it is suggested that the Lower Jurassic source rock in the central Saishiteng depression and its slope entered the gas generation threshold at 29.8Ma(R_O is 0.67%) and 23.8Ma (R_O is 0.87%),respectively.

Key words： Hydrocarbon generation kinetics; Kinetic parameter; Qaidam basin; Jurassic; Saishiteng depression.

Cite this article

Xing Lan-tian,Zhang Xiao-bao,Zhang Rui.Xu Li,Li Wei . Kinetics of Hydrocarbon Generation for Jurassic Source Rocks and Application in Northern Qaidam Basin:Take Saishenteng Depression as an Example[J]. Natural Gas Geoscience, 2012 , 23(1) : 161 -166 . DOI: 10.11764/j.issn.1672-1926.2012.01.161

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