伊犁盆地二叠系烃源岩特征

Permian system hydrocarborn source rocks in Yili basin

综合运用有机岩石学、热解分析及有机地球化学等方法 ,以地表剖面暗色泥岩的分析资料为主 ,结合部分井下暗色泥岩样品分析数据 ,研究了伊犁盆地二叠系烃源岩的有机质生烃特征 ,并分析了控制烃源岩生烃条件的影响因素。研究表明 :中二叠统塔姆齐萨依组暗色泥岩为二叠系主要的烃源岩层系 ;有机质类型以 2 — 型为主 ,部分层段有机质类型较好 ,可达到 1型。认为二叠系烃源岩已不同程度进入成熟—高成熟阶段。

The features of hydrocarbon generating with the organic matters included in Permian system dark mudstones in YiLi basin are mainly researched.This research is based on the analysis of geochemical data of the dark mudstones on outcrop sections and bore hole specimens by means of organic petrology, Rock Evel, geochemistry and so on the comprehensive test. The factors of influence on controling hydrocarbon generating of hydrocarbon source rocks are analysed. The study shows as follows: (1) Tamqisayi formation dark mudstones are main kind of hydrocarbon source rocks in Permian system; (2) Most of the organic metters are typeⅡ 2 to Ⅲ,the better part of them are typeⅡ 1;(3) The organic matters are at maturity to higher maturity stage respectively.