缝洞单元注水开发物理模拟

结合现场资料,根据相似理论确定物理模拟模型参数及试验条件,制作缝洞单元井网模型;通过对该模型进行单相流动试验,研究模型各口生产井对应通道的阻力;通过对该模型进行的水驱油试验,研究不同注入流速下模型的采收率、含水率、注水压力及水驱后的剩余油分布。结果表明:注入流速越大,模型采收率越高,剩余油越少;井打在洞上部时,水驱过后,剩余油存在于溶洞上部的周边位置;渗流通道经过溶洞时,水驱过后,溶洞内几乎不存在剩余油。

Physical simulation of water flooding in fractured-vuggy unit

The model parameters and experimental conditions of physical simulation were gotten based on the field data and similarity theory.A well pattern model of fractured-vuggy unit was established.Using above model,the resistance of every channel corresponding to every production well was studied by the experiment of single phase flow.The oil recovery efficiency,water cut and injection pressure and the distribution rule of residual oil of the model at different injection rate were studied by experiment of water flooding.The results show that the oil recovery efficiency of model increases and the residual oil decreases with the injection rate increasing.When the well is drilled on the top of vug,the residual oil locates on the top of the vug and around the vug edge after water flooding.When the flow path goes through the vug,there is little residual oil after water flooding.