多层复杂断块油藏剩余油表征方法研究

Remaining Oil Characterization Method Research in Complicated Multilayer Fault-block Reservoir

深层多层复杂断块油藏因其地质、油藏的复杂性以及开发过程中长期多层合采合注的生产特点,开发后期剩余油分布极其复杂。以高深油藏为例,在油藏数值模拟的基础上,综合运用剩余油饱和度、储量丰度、水淹级别等指标表征了其剩余油潜力分布。同时,对各小层剩余油指标进行叠加得到砂组、油组及整体的潜力区分布,并绘制了各种指标的过井剖面。通过以上方法,从平面和纵向上精细描述了剩余油的分布,确定了油藏局部及整体剩余油潜力,为该油藏开发后期调整方案的设计奠定了基础,并为同类型油藏的剩余油分布研究提供借鉴。

For the reason of geology,reservoir complexity and multilayer commingled production injection during the field development,the deep multilayer fault-block reservoir＇s remaining oil distribution is very complex.Taking Gaoshen reservoir as an example,based on the reservoir numerical simulation,remaining oil saturation,reserves abundance and water flooded grade to analyze the remaining oil distribution are used.Meanwhile,through stacking each layer＇s remaining oil index,all index＇s through-well profile is protracted,got the potential distribution of sand group,oil group and reservoir.Using this method,the remaining oil distribution is finely described both in plane profile and portrait profile.Local reservoir and all reservoir＇s remaining oil can be got potential which is the basement to make adjust development plan in this reservoir＇s late development stage.And it also has great reference value to study other similar reservoir＇ remaining oil distribution.