天然气驱长岩心室内实验研究

低渗透油藏注水开发效果差、采收率低,而采用气驱技术是动用此类难采储量的有效方法之一。本文利用长岩心实验模型,进行了物理模拟研究,得到了该油藏在纯气驱、纯水驱、完全水驱后气水交替驱、原始状态下气水交替驱和油藏目前注水倍数下气水交替驱等方式下的采收率和压力等变化情况,为油藏选择合理的开采方式提供了依据,并且为进一步的数值模拟工作提供了基础数据。

A Study on Long-Core Experiment of Natural Gas Driving

The efficiency of oil recovery with water flooding process is poor in low-permeability oil reservoirs.In contrast,gas flooding is a more efficient technology to recover the reserve of such reservoirs.In this paper,the experiments of physical model is performed using the long-core flow test,and the variations of recovery factor and pressure are obtained under the different flooding processes,including pure gas flooding,pure water flooding,WAG after water flooding,WAG from very beginning and WAG at present reservoir situation.The research provides the principle for selection of reasonable development manner of low permeability reservoirs and basic data for further numerical simulation.