油气藏研究中流体包裹体应用的几点体会

Experiences on Application of Fluid Inclusion in Research of Reservoir

储层流体包裹体蕴涵着丰富的油气成藏信息,被广泛应用在含油气盆地热史分析、油气成藏研究等领域。值得注意的是,含油储层流体包裹体均一温度高于其正常的埋藏温度,据此计算的成藏时间较晚、流体古压力偏高;含烃流体包裹体多形成于油气充注早中期,有机质成熟度一般低于储层原油的成熟度;早期少量油气充注与晚期大量油气快速充注均难以形成较多的含烃流体包裹体。流体包裹体丰度法确定的古油水界面和成藏期次偏少;盆地晚期高温热液活动有利于驱动油气输导通道中吸附烃的运聚。这些认识对于深化流体包裹体形成机制和油气成藏机理具有重要的理论意义。

Fluid inclusion in reservoir implies abundant information of reservoir-forming,which is widely used in research of thermal history,reservoir-forming,and more territories in petroliferous basin.It is revealed that homogenization temperature of fluid inclusion in oiliness reservoir is more than its normal burial temperature.Reservoir calculated in view of the above is usually formed in late stage with relative high fluid paleopressure.Hydrocarbon-bearing fluid inclusions are mainly trapped in the early and middle period of petroleum migration and accumulation.The maturity of organic material is ordinarily lower than that of crude oil in reservoir.It is difficult to form abundant hydrocarbon-bearing fluid inclusions in the early stage of a little petroleum migration and in late period of a great quantity of petroleum migration speedily.Paleo-OWC and reservoir-forming stages assured by abundance of fluid inclusion are less.The hypothermal fluid action in the late evolution period is favourable for the migration and accumulation of adsorbed hydrocarbon in migration pathway.The results have great significance to study formation mechanisim of fluid inclusion and reservoir.