柯克亚凝析油气藏的油源研究

Study on Oil Source of Kekeya Condensate Oil-Gas Pool

柯克亚原油成因复杂。笔者重点解剖了塔西南地区两套烃源岩侏罗系和二叠系的生物标志物特征 ,并厘定了区分两套烃源岩的指标 ,在此基础上 ,全面研究了柯克亚原油中生物标志物 ,认为柯克亚原油主要来源于二叠系烃源岩 ,同时原油中检测出微量的二萜类化合物 。

The origin of Kekeya crude oil is very complex. The author emphatically analyzes the biological marker features of two sets of hydrocarbon source rocks, i.e.Jurassic and Permian, in the Southwest of Tarim, and defines the standard that could differentiate the two sets of hydrocarbon source rocks. On this foundation, we have comprehensively scan the biological marker of Kekeya crude oil, and the result indicates that Kekeya crude oil mainly derived from Permian hydrocarbon source rock. Moreover, we measure tiny diterpenoid in crude oil, indicating that the Jurassic hydrocarbon source rock has important contribution.