注水开发油田开发层系划分与重组的定量原则和方法

Quantitative Rules and Way for Division and Recombination of Development Layer Systems in Water Flooding Oilfield

多层油藏笼统注水、合采时,由于对层间矛盾的本质认识不清,开发层系划分与重组时,常遵循几个大的定性原则,没有具体的定量原则和方法。从两相渗流理论出发,用数值方法求解,从理论上揭示了层间矛盾的本质是各层水驱油推进速度的差异,而不是贡献大小的不同,指出克服层间矛盾的根本做法是让一套开发层系内各层水驱油均匀推进,进而提出了开发层系划分与重组的完整定量原则和方法,同时结合油田生产实际,从控制见水时间差异入手,给出了简单、易操作的开发层系划分与重组的定量原则和方法,并在商河油田得到了较好的应用。

Based on the theory of two-phase flow, it is theoretically revealed that the essence of the interlayer contradiction is the differ- ence of the water driving velocity of different layers, but not the difference of the contribution of different layers. It is pointed out that the fundamental way to overcome the interlayer contradiction is to make the water driving fronts of a set of development layers uniformly ad- vance. Then the quantitative rules and method for the division and reorganization of the development layers are put forward. According to the production practice in Shanghe oilfield, the quantitative principles and methods for the division and reorganization of development layer systems are given based on the control of the difference of the water breakthrough time of different development layer systems, they are simple and easy to operate, and a good application result is achieved in Shanghe oilfield.