用模型组合实验研究注水油层驱油效率的变化

为解决油层注水时层间非均质性对油田开发的影响 ,用油层岩心制作的真实砂岩微观组合模型实验 ,研究了注水对油层驱油效率的变化情况。实验表明 ,在合并注水层段中高、低渗油层驱油效率的变化规律为 :随注水的继续 ,好油层驱油效率越好 ,差油层驱油效率越差 ;非渗透性夹层的存在能控制注入水的层流性 ,对提高驱油效率有益。探讨了在透镜状砂岩体不同部位注水时驱油效率的特点 ,认为在透镜状砂体边部注水、中部采油 ,高于中部注水、边部采油的驱油效率

A study on the change of efficiency in water flood reservoirs by using multimodel experiment

Multimodel experiment that simulates, the development of water injected reservoirs were made by using the micromodel of real stone. It is proved that the high permeability reservoirs will have high recovery while the low permeability reservoirs will have low recovery at the mean time when they were injected together. Large impermeabile thin bodies are helpful to improve the efficiency of water flood.The experiments show us the efficiency difference when water is injected in different part of reservoirs.