用开放体系的热解方法对烃源岩生烃动力学的研究:以东营凹陷某生油岩为例  

Hydrocarbon generation kinetics of source rocks in open system based on pyrolysis simulation experiment:A case study of the Dongying Depression

作　　者：高喜龙[1] 肖贤明[1] 刘中云[1] 王建宝[1] 郭汝泰[1] 鹿洪友[1] Tang Yongchun 

机构地区：[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]美国加里福尼亚州理工学院

出　　处：《地球化学》2003年第5期485-490,共6页Geochimica

基　　金：国家自然科学基金(40072043)

摘　　要：近年来,烃源岩生烃热模拟实验与生烃动力学研究主要采用封闭体系。然而,在某些地质条件下,烃源岩所处的地质环境更接近于开放体系。应用美国加里福尼亚州理工学院环境能源研究中心多冷阱热解气相色谱仪,结合Kinetics生烃动力学专用软件,对取自东营凹陷的1块ES3页岩生油岩在开放体系条件下进行了生烃动力学研究。结果表明,该生油岩C1～5、C13+、C6～12及C1+生成活化能分别为:238～339、205～268、222～272和251～285kJ/mol。在此基础上,结合利津洼陷埋藏史与受热史,对烃源岩生烃史、生成烃类油气比等成烃特征进行了研究。本研究为生烃动力学方法在油气评价中的应用提供了一个范例。Thermal simulation experiments to model hydrocarbon generation of a sou rce rocks and to determine its kinetic parameters are mainly carried out in a closed system.However,in some petroleum-bearing basins,the geological conditions of source roc ks are more similar to an open system.In this paper,the instrument multi -cool traps GC,a patented product of Calif ornian Institute of Technology,is a pplied,with the combination of the s oftware Kinetics,to model the petroleum gen eration of an Early Tertiary source r ock taken from the Dongying Depression.The results show that the activated e nergy distribution of the source rock for the generation of C 1～5 ,C 13 + ,C 6～12 and C 1 + are 238～339,205～268,222～272and 251～285kJ /mol,respectively.On the b asis of this,the burial and geothermal history of the source roc k is used to model the petroleum generation history,oil /gas ratio and different composition ratio of the ES 4 source rock from the well LJ101,located at the depression center.A method has been suggested for evaluation of hydroca rbon generation amount of source rocks in a petroleum-bearing basin,whi ch is based on the source rocks kinetic parameters.A case study is provided for the investigation of the hydrocarbon generation kinetic parameters of a s ource rock in open system and their th e application to source rock evaluation.

关 键 词：开放体系 烃源岩 生烃动力学 东营凹陷 油气评价 热解 

分 类 号：P593[天文地球—地球化学] P618.13[天文地球—地质学]