摘要
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。
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.
出处
《实验力学》
CSCD
北大核心
2007年第2期161-165,共5页
Journal of Experimental Mechanics
基金
中国石油股份公司科技攻关项目:"注气机理及方案优化研究"的部分内容(项目合同号:020106-1)
关键词
长岩心
天然气驱
采收率
物理模拟
long-core
natural gas driving
recovery factor
physical modelling
