收稿日期: 2011-11-21
修回日期: 2011-12-27
网络出版日期: 2012-02-10
基金资助
国家自然科学基金项目（编号:40472071)资助.
Kinetics of Hydrocarbon Generation for Jurassic Source Rocks and Application in Northern Qaidam Basin:Take Saishenteng Depression as an Example
Received date: 2011-11-21
Revised date: 2011-12-27
Online published: 2012-02-10
采用黄金管—高压釜限定体系生烃动力学设备，对柴北缘侏罗系烃源岩进行生烃动力学模拟实验研究，获得烃源岩的生烃动力学参数。结果表明甲烷生成的活化能范围分布较宽，主要介于49～67kcal/mol之间，有2个高峰，分别为57kcal/mol和66kcal/mol，频率因子A为1×1012/s；C1-5生成的活化能范围分布较甲烷的窄，主要介于52～66kcal/mol之间，只有1个高峰为59kcal/mol，频率因子A为1.10×1015/s。然后结合建立在赛什腾凹陷中心和斜坡上的模拟井，运用Kinetics软件研究赛什腾凹陷烃源岩的生气史，认为凹陷中心下侏罗统烃源岩在29.8Ma（N1)进入生烃门限，对应的RO值为0.67%；而斜坡上的烃源岩在23.8Ma(N12)之后才进入生气门限，对应的RO值为0.87%。
邢蓝田,张晓宝,张瑞,徐丽,李伟 . 柴北缘侏罗系烃源岩生烃动力学及其应用——以赛什腾凹陷为例[J]. 天然气地球科学, 2012 , 23(1) : 161 -166 . DOI: 10.11764/j.issn.1672-1926.2012.01.161
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.C1-5activation 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(RO is 0.67%) and 23.8Ma (RO is 0.87%),respectively.
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