断块油田井控储量与水驱采收率关系研究——以南海西部断块油田为例

摘要

It summarizes and simplifies the irregular injection production well network of the water injection development oilfields in Beibu Gulf Basin of the west of the South China Sea,gets that it mainly uses two kinds of water injection well networks:central water injection and side injection well pattern.It induces and regresses the injection and production characteristic parameters of these two kinds of well networks,deduces the relationship between well controlled reserves and water drive recovery efficiency,obtains unknown parameters in relationship with different parameter calculation method according to the different recognition and development stage of oilfields.It calculates the typical fault-block oil fields in the west of the South China Sea with the formula and gets that the predicting method of recovery efficiency in this paper is high accuracy and convenient which shows that this method can be used to forecast the recovery efficiency of fault-block oilfields in Western South China Sea under different well control reserves,and then guides the overall planning and development work of fault-block oilfields.%将南海西部北部湾盆地断块注水开发油田非规则注采井网进行总结简化,得到南海西部北部湾断块油田主要采用两种注水开发井网:中部注水与边部注水注采井网.对两种井网的注采特征参数进行归纳回归,推导井控储量与水驱采收率关系式,根据油田不同认识与开发阶段采用不同的参数求取方法得到关系式中未知参数.利用该公式对南海西部断块油田进行实例计算,得到该方法预测断块油田不同井控储量下的采收率具有较高精度且方便快捷,进而指导断块油田的整体规划开发工作.