酸液自转向技术，作为油气行业新兴的酸化改造工艺，已进入到工程应用阶段。但其酸岩反应机理研究不够深入，对干热岩高温花岗岩热储的改造研究鲜见报道。本研究依托EGS科学钻探，拟通过流变性实验、岩心流动反应实验和动态反应釜实验揭示自转向酸与高温花岗岩的反应机理，提出一套适用于干热岩高温花岗岩热储的自转向酸液配方。建立多场耦合模型，评价自转向酸的转向性能和改造效果。研究成果对EGS工程的实施有重要意义。

Injecting the viscoelastic surfactant-based self-diverting acid (VES acid) is a new and effective method to divert acid to other low permeability zones in reservoir stimulation. While the study of its reaction mechanism is just not enough and the applying in granite reservoir under high temperature is rarely been reported. This project researches on the reaction mechanism between VES acid and granite by rheology experiment, flow reaction experiment and dynamic kettle experiment. Put forward a suitable formula of VES acid for EGS granite reservoir. Then build THC modeling to evaluate the self-divert performance of VES acid and its reservoir stimulation effect. The research results will have important significance to EGS project.