电磁加热解除近井地层凝析油堵塞的数学模型

MATHEMATICAL MODEL TO REMOVE CONDENSATE BLOCKAGE BY ELECTROMAGNETIC HEATING

文章针对凝析油堵塞严重影响凝析气井产能的问题,提出了用井下电磁感应加热技术来解除近井地层凝析油堵塞的方法,并建立了相应的数学模型。凝析气的非等温渗流是一个涉及复杂相态变化的过程,采用组分模型存在求解困难及计算所需参数难以获取的问题,文章中渗流模型采用了有限组分模型,既能模拟凝析气相态特征,又避免了复杂的相态计算,而且计算所需参数的获取相对容易。模型中考虑了凝析气的高速非达西渗流。用数值方法对数学模型求解,并研制了模拟软件。

Aiming at the problem of condensats gas well productivity influenced by condensate oil blockage severely, the method to remove the condensate oil blockage in the zones near the borehole by down-hole heating techniques of electromagnetic induction is proposed. And the corresponding mathematical model is developed. The non-isothermal percolation of condensate gas is a complicated process of phase state changing. It is difficult for the component model to solve and obtain the parameters needed by calculation. The finite component model is used as the percolation model in the article. It can not only simulate the phase state features of condensate gas and avoid the complicated calculation of phase state, but also easily obtain the parameters needed by calculation. The influence of non-Darcy flow of condensate gas with high flow rate is considered in the model, With numerical method, the mathematical model is solved. And the simulation software is developed.