粘弹性聚合物驱油的数学模型

为了研究粘弹性聚合物驱油规律,建立了粘弹性聚合物驱油数学模型。从弹性效应和粘性效应两个方面描述聚合物驱油机理。聚合物弹性能够降低残余油饱和度,聚合物粘性改善油水流度比,扩大波及体积。该模型能够模拟聚合物驱油具有的提高微观驱油效率和流度控制驱油机理以及所发生的对流、弥散、扩散、吸附等一系列物化现象。利用该模型拟合了实验室聚合物岩心驱油过程。数值模拟结果与实际岩心驱油过程基本一致,表明该模型可以进行聚合物驱油的机理研究、实际应用可行性研究、矿场方案优选和开发效果预测。

Mathematical model of enhanced oil recovery for viscous-elastic polymer flooding

A mathematical model of viscous-elastic polymer flooding was developed to study enhanced oil recovery mechanisms and to forecast oil exploitation performance.The model simulates both the elasticity effect and the viscosity mobility control effect.Polymer elasticity can reduce residual oil saturation,while polymer viscosity will improve the mobility ratio between the oleic and aqueous phases, which will expand the volumetric sweep efficiency.The main process mechanisms include increasing the displacement efficiency and mobility control.The model incorporates various physicochemical phenomena such as convection,dispersion,diffusion,and adsorption.Simulations of known core flooding data show that the model can simulate viscous-elastic polymer flooding mechanisms for use in feasibility evaluations,pilot plan optimization,and performance predictions for viscous-elastic polymer enhanced oil recovery.