縫洞单元注水开发物理模拟

Physical simulation of water flooding in fractured-vuggy unit

关键词:  缝洞单元  井网模型  相似准则  注水开发  剩余油

Key words:  fractured-vuggy unit  well pattern model  simiUrity criteria  water flooding  residual oil

摘要:

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铟;通过对该模型进行 单相流动试验,研究模甩各口生产并对应通道的阻力；通过对该模型进行的水驱油试验，研究不同注入流速下模墦 的采收率、含水率、注水压力及水驱后的剩余油分布?结果忐明:注入流速越大，模型采收率越卨,剩余油越少;并打 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。

Abstract:

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 phaae flow. The oil recovery efficien> cy，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 ihe vug and around the vug edge after water flooding. When the flow path goes through the vug, there is iittle residual oil after water flooding.