胜利油田稠油油藏氮气泡沫驱适应性研究

Study on the Adaptability of Nitrogen Foam Flooding for Heavy Oil Reservoir in Shengli Oilfield

针对胜利油田的油藏条件,利用物理模拟实验和油藏数值模拟技术,详细研究了油层非均质性,原油粘度,油层韵律性等油藏条件对氮气泡沫驱油效果的影响,并对起泡剂浓度,注入气液比,泡沫注入量,转驱时机等参数进行了优化.研究结果表明:氮气泡沫驱具有优良的封堵调剖能力,能很好地改善非均质性稠油油藏的开发效果.在此基础上,总结出了适合于氮气泡沫驱开采的油藏条件,所得结果对胜利油田选择合适的氮气泡沫区块具有一定的指导意义.

The influences of reservoir heterogeneity, the viscosity of crude oil and formation rhythm on nitrogen foam flooding efficiency have been investigated at length by means of laboratory experiments and numerical simulation in light of Shengli oilfield＇ s specific reservoir conditions. The operating parameters, including concentration of foaming agent solution, gas liquid injection ratio, foam injection volume and foam injection time, are optimized. The study shows that nitrogen foam flooding has excellent blocking ability and can improve the performance of heterogeneous heavy oil reservoirs very well. Based on the results test and simulation, the reservoir conditions which adapt to nitrogen foam presented. The results of this study have guidance to select suitable heavy oil nitrogen foam flooding in Shengli oilfield. development of laboratory flooding are reservoirs for