水驱多层砂岩油田注采关系定量评价方法研究

Evaluation of Injection-production Relation of Multilayer Sandstone Oilfields

针对喇萨杏油田油层多、非均质性严重、开发时间长、层系井网复杂的特点,以精细地质研究成果和渗流理论为基础,首先提出了一套油水井注采关系的自动划分方法,实现了多套层系不同开发阶段油水井注采关系划分的自动化;其次研究形成了改进的水驱控制程度统计方法,并提出了水驱控制程度构成的概念,最终形成了水驱砂岩油田注采关系的自动评价技术。提出的方法具有操作简便、实用、效率高的优点,可广泛应用于水驱砂岩油田的注采关系评价和油层动用状况研究。通过喇萨杏油田11个水驱区块的应用,水驱控制程度统计精度达到98.6%,极好地满足了油田需要。

In consideration of the characteristics of multi-layers,serious heterogeneity,long time of development and complex well pattern,based on fine geologic research result and the percolation theory,a set of methods were proposed for automatically dividing the injection-production relation,and automatic division of the injection-production relation of different stratum series at different development stages was realized.An improved waterflooding controlled statistic method was created,and a concept of waterflooding control level was proposed,by which an automatic evaluating technique for waterflooded sandstone oilfield was established.The method is easy operation,practical and high efficiency and it can be deployed widely for evaluating the injection-production relation and the reservoir performance of waterflooded sandstone oilfields.It is used in 11 waterflooded blocks of Lasaxing Oilfield with the accuracy of waterflooding controlled level of 98.6%.It could satisfy the field requirements.