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对于天然微裂缝比较发育，液体漏失严惩的低渗透碳酸盐岩储层，酸液有效作用有效距离主要是受酸液滤失控制，但是由于酸的反应特性，酸液滤失相对于压裂液来说复杂得多，迄今为止尚未建立完善的酸液滤失模型，使得在制定施工方案时，难以科学确定酸压施工酸液用量。文章介绍了一种酸液动态滤失实验研究方法，分析了酸液滤失特征，通过对滤失实验数据的分析与处理，确定出“酸蚀蚓孔”形成时间，将其作为酸压施工注酸时间的参考值，从而避开复杂的酸液滤失计算，合理确定实施酸压作业的用酸量。将实验研究结果与现场酸压施工分析对比，结果证明具有较好的吻合性。

DETERMINATION OF THE ACID VOLUME IN ACIDIZING AND FRACTURING OPERATIONS BY EXPERIMENTIZING DYNAMIC FILTER LOSS OF ACIDIZING FLUID

The effective action radius of acidizing fluid is mainly controlled by its filter loss for the low-permeability carbonate reservoirs with relatively developed microfractures and serious fluid loss. However, the filter loss of acidizing fluid is much complex as compared with the fracturing fluid due to its specific reaction property,and a perfect model of the filter loss of acidizing fluid is not set up yet to this day, making the acid volume difficult to determine scientifically in drawing up an operation plan. In this paper,an experimental method for the dynamic filter loss of acidizing fluid is presented,the characteristics of the filter loss of acidizing fluid are analyzed and the forming time of "acid etched wormhole" is determined and taken as a reference to the acid-injected time in acidizing and fracturing operations through analysis and processing of the filter loss experiment data. Thus, the acid volume for acidizing and fracturing operations can be rationally determined, avoiding complex calculation for acidizing fluid loss. Through a comparative analysis of the experimental results with the site operation,it is proved that the results are well coincident.