低含油饱和度砂岩油藏水驱特征实验

针对胜利油区低含油饱和度砂岩油藏开发初期在油藏含油层段出现油水同出的现象,进行了物理模拟实验,通过水驱过程中模型内含水饱和度的变化以及模型出口含水率的变化研究了低含油饱和度砂岩油藏水驱油特征.研究结果表明,低含油饱和度油藏初始含水率存在一个稳定波动阶段,其初始含水率是由油藏原始含水饱和度决定的,并且可以根据室内相对渗透率实验得到的一维模型的含水率与含水饱和度的关系曲线和油藏原始含水饱和度来预测油井初始含水率.

Experiment:water flooding characteristics of low oil saturation sandstone reservoirs

Physical simulation experiment was made to make clear the reasons of oil-and-water come together in the oil-bearing intervals of low oil saturation sandstone reservoirs in early development stage. Through testing the change of water saturation and exit water cut of the model,the characteristics of water flooding were researched. The results reveal that the initial water cut of low saturation sandstone reservoirs may experience a stable fluctuating phase, which is determined by initial oil saturation, and ca...