水平井笼统酸化技术是碳酸盐岩气藏简便且重要的改造手段，常用的酸化方式包括基质酸化和压裂酸化两大类。合理选择水平井酸化方式，对高效开采碳酸盐岩气藏和优化工艺方案有重要意义。推导了碳酸盐岩气藏水平井酸化无因次采气指数计算式，建立了利用碳酸盐岩酸化增产系数优选碳酸盐岩气藏水平井笼统酸化方式的方法，分析了地质和工程因素对酸化增产系数的影响规律，并进行了现场验证与应用。研究发现：当碳酸盐岩酸化增产系数R_JH>1时，基质酸化井的产能大于压裂酸化井；当R_JH<1时，压裂酸化井的产能大于基质酸化井。当气藏渗透率各向异性系数、压裂裂缝数量和酸液用量增大，碳酸盐岩酸化增产系数减小；当气藏孔隙度、水平段长增大，碳酸盐岩酸化增产系数增大。当气藏孔隙度小于7.3%时，压裂酸化井的产能更高；当水平段长为500 m、压裂裂缝数量大于4时，酸化增产系数R_JH<1，压裂酸化井的产能更高；当酸液用量为600 m³时，酸液溶解能力X>0.08的情况下，压裂酸化井的产能更高。利用川东北区块碳酸盐岩储层进行验证，结果表明利用增产系数法进行工艺优选后增产效果显著。研究结果为优选碳酸盐岩气藏水平井的酸化方式提供了理论指导。

The general acidification technology of horizontal wells provides a simple and important method of stimulation for carbonate gas reservoirs. The common acidization methods were divided into two major categories: matrix acidification and fracturing acidification. To determine the best stimulation method of horizontal wells between acid fracturing and matrix acidizing, it is significant to achieve the efficient exploitation of reservoirs and optimization of process program. A dimensionless gas production index formula was obtained for horizontal well acidizing in carbonate gas reservoir. Also, a carbonate-acid-stimulation coefficient model was established to optimize the general method of acidification for the horizontal wells in carbonate gas reservoirs. Then, the influence of geological and engineering factors on the acidization increase coefficient was analyzed. Finally, field verification and application were conducted. The conclusions are as follows. When the carbonate-acid-stimulation coefficient R_JH > 1, the productivity of matrix acidizing wells exceeds that of fractured acidizing wells. When R_JH < 1, the productivity of fractured acidizing wells is higher compared to matrix acidizing wells. A higher permeability anisotropy coefficient increases, the number of fracturing fractures and the amount of acid fluid, but reduces the carbonate-acid-stimulation coefficient. The increase in porosity and horizontal length lead, to a higher carbonate-acid-stimulation coefficient. When the porosity of the gas reservoir falls below 7.3%, the productivity of the fractured acidizing well is improved. When the length of the horizontal section is 500 m and the number of fracturing fractures exceeds 4, the carbonate-acid-stimulation coefficient R_JH < 1, and the productivity of the fractured acidizing well is improved. When the total volume of acid solution injected is 600 m³, the productivity of fractured acidizing well reaches a higher level than when the acid-solution volumetric dissolving power X > 0.08. As verified in the carbonate reservoirs located in the northeastern Sichuan block, the production increase effect produced by using the carbonate-acid-stimulation coefficient method is significant after process optimization. Therefore, a theoretical guidance is provided in this paper for optimizing the acidification method of horizontal wells in carbonate gas reservoirs.