Matrix acidizing is one of the most important technologies to recover or enhance oil/gas recovery by injecting acid fluids to dissolve rocks and increase the permeability near the wellbore. The wormholes with different patterns are generated in the dissolution process. In addition to the injection parameters, acid types and physical properties of rock, the temperature is one of the potential factors to affect wormholing performance, especially for some temperature dependent diverting acids. However, few works concentrated on the influence of reaction heat on wromholing. In this work, the acid-rock molar reaction heat considering comprehensive impact of temperature, pressure and volumetric work of CO₂ was introduced into the heat transfer model, and combined with two-scale model. The models were numerically simulated to highlight the influence of different factors on reaction temperature profiles, wormhole patterns and breakthrough curves under isothermal and non-isothermal conditions with radial coreflood simulations, and the modeling results are in good agreement with the experiments. The simulation results illustrate that molar reaction heat influences the reaction temperature profile to some extent, and can affect wormholing on macro-scale under certain conditions. During the reaction, the highest reaction temperatures are observed at the wormhole tips, which are over 11 K in our simulations. Under isothermal conditions, the temperature and acid concentration strongly affect the wormhole propagation progress, but pressure does not. The field application condition of matrix acidizing considering non-isothermal Influence is also systematically studied. It was found that a colder acid injection or a lower rock temperature will promote the acidizing efficiency when the injection rate is within the appropriate range.

基质酸化是通过注入酸性流体溶解岩石并增加井眼附近渗透率来恢复或提高油气采收率的最重要技术之一。在溶解过程中会产生不同模式的虫洞。除了注入参数，酸的类型和岩石的物理性质外，温度也是影响蜗杆钻削性能的潜在因素之一，特别是对于某些与温度相关的转向酸。但是，很少有工作集中在反应热对木纹的影响上。在这项工作中，酸岩摩尔反应热考虑了温度，压力和CO _2的体积功的综合影响引入传热模型，并与两尺度模型相结合。用径向岩心模拟对数值模型进行了数值模拟，以突出不同因素对等温和非等温条件下反应温度曲线，虫孔模式和穿透曲线的影响，并且建模结果与实验吻合良好。仿真结果表明，摩尔反应热在一定程度上影响反应温度曲线，并在一定条件下影响宏观上的蜗杆作用。在反应过程中，在虫洞尖端观察到最高的反应温度，在我们的模拟中超过11K。在等温条件下，温度和酸浓度强烈影响虫洞的传播进程，但压力却不受影响。还系统地研究了考虑非等温影响的基质酸化的现场应用条件。已经发现，当注入速率在适当范围内时，较冷的酸注入或较低的岩石温度将促进酸化效率。