考虑滞后效应的水气交替近混相驱数值模拟

Numerical simulation of near-miscible flooding of water alternating gas considered
hysteresis effect

刘子雄 刘德华 李菊花 汪亚蓉

长江大学石油工程学院，湖北 荆州 434023

School of PetroleumEngineering, Yangtze University, Jingzhou 434023, China

受众多因素的影响，油藏注气难以达到物理意义上的混相。针对水气交替注入方式中气水切换困难的实际情况，在组分数值模拟方法中引入三相相渗滞后模型，结合某油田水气交替混相驱矿场试验，进行了数值模拟计算。结果表明，采用混相驱组分模型、考虑相渗滞后效应的模拟结果，与常规模拟相比，采收率有所降低，而采用近混相驱模拟，采收率降低幅度更大。新模型为准确预测注气开发及有效控制注气参数提供了新思路，在未来的历史拟合中能起到重要作用。

This paper introduces a triphase relative permeability hysteresis model in compositional numerical simulation in view of the
gas-water switching difficulty in water alternating gas way by the influence of various factors. The paper combines with the miscible
water-alternating-gas field example in a oilfield and numerical simulation calculation is taken. A new viewpoint about influence of
relative permeability hysteresis on the water-alternating-gas injectability is presented in this paper. A new model considering threephase
relative permeability hysteresis on compositional model is used in Pubei Oilfield. The simulation result shows the influence of
the hysteresis model on oil production. A new thought about production forecasts and injection control is provided and it will play an
important role for history matching in future.