微尺度下泡沫贾敏效应数值模拟分析

Numerical simulation analysis of Jamin effect of foam in microscale

为考察泡沫流体的注入速率、液相黏度、表面张力、曲率半径对通过孔喉时产生的贾敏效应阻力的影响,建立了孔喉几何模型,采用水平集方法追踪界面变化,研究了微尺度下贾敏效应下泡沫的运移规律。结果表明,注入速率越大,注入压力越大,贾敏效应阻力越大;液相黏度越大,泡沫液膜强度越大,贾敏效应阻力越大;贾敏效应阻力与表面张力呈正相关关系,表面张力越大,较难发生形变,所需的驱动力就越大;贾敏效应阻力与曲率半径呈负相关关系,曲率半径越大,贾敏效应阻力越小。该研究结果对油气田开发中合理利用贾敏效应具有一定的借鉴意义。

In order to explore the influence of injection speed,liquid viscosity,surface tension and radius of curvature on the Jamin effect resistance of foam through micro pores,a pore-throat model is established.By using the level set method to track interface changes,the migration law of foam under Jamin effect at microscale is studied.The results show that the greater the injection rate,the greater the injection pressure,and the greater the resistance of Jamin effect.The greater the liquid viscosity is,the greater the strength of the foam lamella is,and the greater the resistance of Jamin effect is.The resistance of Jamin effect is directly proportional to the surface tension.The higher the surface tension is,the more difficult it is to deform and the greater the driving force is needed.Jamin effect resistance is inversely proportional to the radius of curvature and the larger the radius of curvature,the smaller the resistance of Jamin effect.The research results have certain reference significance for the rational utilization of Jamin effect in oil and gas field development.