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我们对Berea砂岩岩心进行了一系列的钻井泥浆侵入实验，以测量由泥浆滤液和泥浆颗粒引起的油层损害的程度和深度。本研究中使用了一种专门设计的动态滤液岩心夹持器。当泥浆循环时，我们可以使用岩心夹持器上的测压点测量岩心三个部分的渗透率。不同矿化程度和不同流速的七种泥浆通过岩心表面循环10h，泥浆循环过后，测量盐水和原油的恢复渗透率。实验结果表明：皂土浓度、有效的颗粒粒径、絮凝种度、聚合物添加剂浓度以及岩心内原油的饱和度对油的损害程度有影响。
We performed a series of drilling mud invasion experiments on Berea sandstone cores to measure the extent and depth of reservoir damage caused by mud filtrate and mud particles. A specially designed dynamic filtrate core holder was used in this study. When the mud circulates, we can measure the permeability of the three parts of the core using the pressure-measuring point on the core holder. Seven muds with different degrees of mineralization and different velocities circulated through the core surface for 10h. After the mud was recycled, the recovery permeability of the brine and crude oil was measured. The experimental results show that the concentration of bentonite, effective particle size, flocculation degree, polymer additive concentration and the saturation of crude oil in core have an impact on the degree of oil damage.