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用动态滤失实验研究了压裂液的滤失行为,滤饼的性质,滤饼对岩心渗透率的伤害及其解除方法。动态滤失及其伤害数据能够最大程度地模拟实际情况。实际的动态滤失行为、滤饼性质和渗透率伤害受到聚合物加量、液体类型与组成、温度及剪切速率、滤失压差和岩心物性等多方面因素的影响,其它因素的影响效果都与岩心物性密切相关。滤饼溶解剂FCS可用在压裂的预前置液或后处理液中,有效恢复由于聚合物在地层浓缩形成滤饼等造成的渗透率伤害。
The dynamic fluid loss experiments were carried out to study the fluid loss behavior of the fracturing fluid, the properties of the filter cake, the damage of the filter cake to the permeability of the core and the way to release it. Dynamic filtration and its damage data to the maximum extent possible to simulate the actual situation. The actual dynamic fluid loss behavior, filter cake properties and permeability damage are affected by various factors such as polymer loading, type and composition of liquids, temperature and shear rate, differential pressure loss and core material properties, and the effects of other factors Both are closely related to core physical properties. The filter cake dissolving agent FCS can be used in fracturing preflush or after-treatment fluid to effectively recover the permeability damage caused by polymer concentration in the formation of filter cake and the like.