In YB carbonate gas reservoirs, taking acidizing measures for horizontal wells is a common practice. In heterogeneous carbonate reservoirs, the acid injection profile of a horizontal well determines the acid distribution along the horizontal well. However, the present methods are not suitable for reservoirs with high temperatures and strong heterogeneity such as YB carbonate gas reservoirs. This work presents an experimental evaluation method for the acid injection profile of horizontal wells during the carbonate acidizing process. Based on the status of horizontal wells in YB carbonate gas reservoirs, an injection experimental apparatus with horizontal wells was designed and implemented. Experiments on the fluid injection profiles of horizontal wells with different formation types in an YB carbonate gas reservoir were performed, and the effects of the permeability combination, drawdown pressure, and wellbore pressure drop on the fluid injection profiles were studied. From the experimental results, a chart of the experimental drawdown‒permeability‒fluid injection volume was generated. By combining this chart with the creation of a permeability‒pore volume multiplier chart, an experimental evaluation method was developed to evaluate horizontal well acid injection profiles. The findings in this research provide a method for acid injection evaluation and selection of target well segments for acidizing horizontal wells in YB carbonate gas reservoirs and similar oil/gas reservoirs.

在YB碳酸盐岩气藏中，对水平井采取酸化措施是一种常见的做法。在非均质碳酸盐岩油藏中，水平井的酸注入曲线决定了沿水平井的酸分布。然而，本方法不适用于具有高温和强非均质性的储层，例如YB碳酸盐气储层。这项工作为碳酸盐酸化过程中水平井的注酸曲线提供了一种实验评估方法。根据YB碳酸盐岩气藏水平井的现状，设计并实现了水平井注入实验装置。对YB碳酸盐岩气藏中不同地层类型水平井的注水剖面进行了实验，并研究了渗透率组合，压降压力和井眼压降对流体注入剖面的影响。根据实验结果，生成了实验回落率，渗透率，流体注入量的图表。通过将此图与渗透率/孔体积乘数图的创建相结合，开发了一种实验评估方法来评估水平井注酸剖面。这项研究的发现为YB碳酸盐岩气藏和类似油气藏的水平井的酸注入评估和目标井段的选择提供了一种方法。产生了实验回落率，渗透率，流体注入量的图表。通过将此图与渗透率/孔体积乘数图的创建相结合，开发了一种实验评估方法来评估水平井注酸剖面。这项研究的发现为YB碳酸盐岩气藏和类似油气藏的水平井的酸注入评估和目标井段的选择提供了一种方法。产生了实验回落率，渗透率，流体注入量的图表。通过将此图与渗透率/孔体积乘数图的创建相结合，开发了一种实验评估方法来评估水平井注酸剖面。这项研究的发现为YB碳酸盐岩气藏和类似油气藏的水平井的酸注入评估和目标井段的选择提供了一种方法。