塔里木盆地油气藏形成期分析

塔里木盆地具有多 期生排烃、成藏、调整和破坏的特点。综合利用圈闭形成与生排烃分析法、储集层有机岩石分析法、储集层成岩矿物生要是伊利石)同位素地质年代法、油气藏饱和压力或露点压力推算法,对塔里木盆地油气藏的形成期进行了系统的分析,结果认为,油气藏主要形成时期为印支运动期一喜马拉雅运动晚期,而且多为喜马拉雅运动中晚期。并通过对塔里木盆地不同的含油系统的归纳和分析,指出塔里木盆地具有晚期成藏的特点。

Analysis of the Formation Stages of Oil and Gas Reservoirs in Tarim Basin

Tarim basin is characterized by multistage hydrocarbon generation and migration,formation of reser-voir,regulation and destruction.This paper,by means of trap-forming and hydrocarbon generation/drainage analysis method,organic reservoir rock analysis method,diagenetic mineral(e.g.illite)isotopic dating method,and calculation by saturation pressure /dew point pressure in hydrocarbon reservoirs,makes a systematic analysis of reservoir formed stages in Tarim basin.The results show that the oil reservoirs are primarily formed in Indo-China-Late Himalayan movement ,dominated by Middle-Late Himalayan movement.In addition,the different petroleum systems in Tarim basin have been drawn and analyzed,pointing out that Tarim basin is characterized by forming reservoirs in late stage.