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酸液滤失量是压裂液滤失量的数倍，在裂缝中穿透的距离将对酸化效果产生重大影响，在碳酸盐岩酸压施工的模拟计算中，它是必须考虑的因素。对碳酸盐岩酸压中酸液有效作用距离的预测方法进行了改进，通过考虑酸液流动过程中裂缝横截面积随时间和空间的变化，采用输运公式建立了酸液在缝中的流速分布方程，引入了δ函数，考虑了注入点的影响。同时，根据实际情况提出了根据酸液滤失判断有效作用距离的新方法，采用反应与滤失双重标准予以判定，使得酸液有效作用距离的计算更合理。模型考虑了同离子效应、温度场、酸岩反应热等因素的影响，较以前的模型更为准确地预测了酸液有效作用距离，从而为施工参数设计和施工效果预测提供了依据。
Acid filtrate loss is several times the amount of fluid loss of fracturing fluid, the penetration distance in the fracture will have a significant impact on the acidification effect, which is a factor that must be considered in the simulation of carbonate acid pressure construction . The method of predicting the effective working distance of acid solution in carbonate acid pressure was improved. By considering the change of the cross-sectional area of the fracture with time and space in the flow of acid solution, The velocity distribution equation introduced the delta function, taking into account the effect of the injection point. At the same time, according to the actual situation, a new method to judge the effective distance based on the acid filtrate loss is proposed. The double standard of reaction and filtration is used to judge the effective distance of acid solution. The model takes into account the influence of ion, temperature and acid heat of the acid rock. The model predicts the effective working distance of the acid more accurately than the previous model, which provides the basis for the construction parameter design and construction effect prediction.