辽河油田大民屯凹陷下第三系生油岩排烃研究

采用高温高压半封闭实验体系,对大民屯凹陷下第三系生油岩进行了排烃热模拟实验,结果表明制约生油岩排烃量的因素是有机质丰度,而制约生油岩排烃效率的因素则是有机质类型。排烃作用对原油族组成烷烃和非烃和沥青质的含量影响较大,对芳烃含量影响较小。两类生油岩的排烃模式均具有无突发性排油高峰的特征。

INVESTIGATION OF HYDROCARBON EXPULSION FROM EOGENE SOURCE ROCK IN DAMINTUN DEPRESSION,LIAOHE OILFIELD

Thermal simulation of hydrocarbon expulsion from Eogene source rock in Damintun Depression were mnde with high temperature-pressure semi-closed experimental system.The results show that the factor controlling hydrocarbon expulsion amounts is organic matter abundance of the source rock, but the factor controlling expulsion efficiency is the type of organic matter. Higher expulsion amount does not always mesn higher expulsion effciency. The content of alkanes and NSO compounds in crude oil is remarkably affected by hydrocarbon expulsion, while that of aromatics is only slightly affected. Hydrocarbon expulsion models of the souree rocks in the depression are characterized by no abrupt peak of petroleum expulsion.