用集总参数模型预测砂岩酸化效果

PREDICTION OF RESULTS OF SANDSTONE ACIDIZATION BY LUMPED PARAMETER MODEL

使用土酸处理砂岩地层,解除井壁附近地层伤害,是广泛采用的一种增产措施。但怎样预测砂岩酸化效果,选择最佳施工参数,仍未得到很好的解决。本文利用集总参数模型计算酸沿地层的浓度分布,用数值方法求解酸化增产倍比,从而给出了一套简便而适用的砂岩酸化效果预测方法。文中给出了求解方法并进行了示例计算。

The method of using mixture of HF and HCL to treat sandstone formations of remove formation damage near the wellbore is a widely used stimulation treatment. However, how to predict the results of sandstone acidization and select optimal job parameters is still an open question. Using lumped parameter model to calculate the distribution of acid concentration along the formation, this paper presents a set of simple methods available for predicting sandstone acidization by using numerical solution to calculate the acidizing stimulation ratio. This paper also gives out the solution and calculations of some examples.