评价粘土膨胀与微粒运移对储层渗透率影响的数值方法

The numerical method for estimating the effect of clay swelling and fines migration on permeability

钻井过程对储层的损害,主要是粘土膨胀和微粒运移造成的。本文提出了一个比较实用又便于数值化的数学模型,它综合考虑了粘士膨胀、微粒运移以及岩石对微粒的吸附作用等因素对渗透率的影响,运用这种数值方法可以预测钻井完井液对储层的损害,对保护油气层具有重要的实际意义。

Invasion of drilling fluid and completion fluid causes clay swelling and fines migration, which leads to formation damage. The paper established a mathematical model for estimating the variations on permeability, with a numerical method given. This method could be used to minimize formation damage by optimizing the performance of drilling fluid and completion fluid.