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为了使钻井液和完井液引起的地层损害最小化 ,桥堵剂体积必须足够大 ,使得钻井液和完井液不被挤入岩石中 ,同时桥堵剂体积也必须足够小 ,使之能够形成泥饼 ,将进入地层的泥浆中的钻屑和聚合物过滤出来。原文介绍了一种预测由钻井液和完井液中存在的粒径大小不同的岩屑引起的地层受损深度和程度的数学模型。泥浆侵入和回流后 ,该模型对地层受损深度和渗透率损失进行了计算 ,得出的结果与泥浆过滤实验结果吻合得很好
In order to minimize formation damage caused by drilling fluids and completion fluids, the volume of bridging agent must be large enough that drilling fluid and completion fluid are not forced into the rock, and the volume of bridging agent must also be small enough to enable The mudcake is formed and the cuttings and polymer entering the mud in the formation are filtered out. This paper presents a mathematical model that predicts the depth and extent of formation damage caused by cuttings of different particle sizes present in drilling fluids and completion fluids. After the mud invasion and backflow, the model calculated the damage depth and permeability loss of the formation, and the results are in good agreement with the experimental results of mud filtration