裂缝性低渗透油藏空气泡沫驱方案优化

Scheme Optimization of Air-foam Flooding in Fractured Low Permeability Reservoirs

红河105井区是镇泾低渗透油田主力含油区块,但储层裂缝发育,目前存在水驱开发效果差、产能下降快等问题。为了进一步提高红河105井区的开发效果,在储层特征和原油渗流特性研究的基础上,利用油藏数值模拟技术,优化了空气泡沫驱注入方式以及注入速度、气液比、注入周期等参数,并对空气泡沫驱开发指标进行了预测。由模拟研究可知,采用优化的空气泡沫驱开发方案增油效果明显,有利于提高原油采收率,该研究对同类油藏注空气泡沫开采具有指导意义。

Wellblock Honghe 105was the main oil-bearing block of Zhenjing Oilfield,fractures were developed.It had some problems at present,such as poor waterflooding effect and low oil productivity and so on.In order to further enhance the development effect in the wellblock and based on the study of the reservoir characteristics and feature of crude oil percolation,a numerical reservoir simulation was carried out for optimizing the parameters of injection method of air foam flooding,injection rate,gas-liquid ratio,injection cycle and foaming agent concentration for air-foam flooding.Also its development index was forecasted.The numerical simulation results show that the optimezed development scheme is air-foam flooding and obvious stimulation effect is obtained,it is beneficial for enhancing oil recovery,it provides guidance for air-foam flooding in similar reservoirs.