塔河油田奥陶系有机包裹体的油气指示意义

HYDROCARBON INDICATOR SIGNIFICANCE OF ORGANIC INCLUSIONS IN THE ORDOVICIAN RESERVOIR IN TAHE OIL FIELD

有机包裹体是烃类保存至今的原始样品,记录了烃类生成、运移和聚集等过程的丰富信息。文章针对塔河油田奥陶系储层具有多期油气充注的特点,对储层中的有机包裹体进行了岩石学显微观察、荧光显微观测以及均一温度显微测定等研究,以探讨有机包裹体所蕴涵的油气指示意义。结果表明,塔河油田奥陶系储层中捕获的有机包裹体有纯油两相包裹体、纯天然气单相包裹体、油+气+盐水三相包裹体和含烃盐水两相包裹体4类,指示了奥陶系储层分别发生过石油和天然气的充注。进一步分析表明,塔河油田奥陶系储层共经历了4期油充注和1期天然气充注。

The organic inclusion is the original sample of hydrocarbon′s being preserved up to now and it contains a wealth of information about the hydrocarbon generation,migration and accumulation.In light of the characteristics of hydrocarbon multistage charges in the Ordovician reservoir in Tahe oil field,the hydrocarbon indicator significance of organic inclusions is discussed in the paper on the basis of the researches on the petrologic microscopic examination,fluorescence microscopic examination and homogenization temperature measure of the organic inclusions in the reservoir.The results show that the organic inclusions contained by the Ordovician reservoir in Tahe oil field include four types,i.e.net oil single phase inclusions,net gas single phase inclusions,oil gas brine three phase inclusions and hydrocarbon bearing brine two phase inclusions,which indicates that there existed oil/gas multistage charges,i.e.four oil charges and one gas charge,in the Ordovician reservoir in Tahe oil field.