复杂碳酸盐岩储层转向酸与固体转向剂协同转向机理研究

The reservoir of carbonate has many characteristics, such as high depth, high temperature, development of fracture-cave. Diverting acidizing is the key technologies which include building production, steady production and stimulation. Based on the theory of reaction kinetics, test of diverting acid reaction kinetics and flow reaction experiment of long core and parallel core, we will set up test of acid-rock reaction of diverting acid mathematic model of viscosity changing, using three-dimensional CT scan to analyze the regularity of expansion of acid wormhole and to establish three-dimensional mathematical model of acid wormhole extension in the non-homogeneous reservoir. Besides, using the experiment of large visual multi-fracture model and high temperature, pressure leakage, we will research the diverting law of solid diverter in multi-fracture and analyze the difference between mathematic model and result of test. Meanwhile, in order to do the combination experiment of diverting acid and solid diverting agent, we will erect the system of multi-fracture in high pressure and temperature. Therefore, based on the comprehensive consideration of the development characteristics of reservoir rock and space structure, we will build the model of real geological of rock properties and will use model of acid-rock reaction of diverting acid ,mathematic model of viscosity changing, three-dimensional mathematical model of acid wormhole extension and complex system model of fluid-solid coupled to research dynamic cooperation characterization of diverting acid and solid diverting agent in multi-factors.

针对复杂碳酸盐岩储层埋藏深、温度高、孔洞缝发育、矿物组成分布不均等特点，转向酸化技术是其建产、稳产、增产的关键技术手段。基于反应动力学理论，开展转向酸酸岩反应动力学测试，建立反应速率机理模型；基于转向酸流变行为测试，建立其粘度变化数学模型。基于长岩心、并联岩心流动反应实验，借助高能CT扫描技术，剖析酸蚀蚓孔扩展规律，并建立非均质储层酸蚀蚓孔立体延伸数学模型。采用大型可视化多裂缝物模试验和高温高压漏失实验，研究固体转向剂在多尺度裂缝内运移物理转向规律，并与流固耦合模拟结果对比分析。构建高温高压大尺寸多多角度、多裂缝系统，开展转向酸与固体转向剂协同转向模拟试验。综合考虑储层岩矿和空间结构的发育特征，建立反应真实岩石特性的地质模型，同时结合转向酸酸岩反应速率机理模型、转向酸粘度变化数学模型、三维蚓孔立体延伸扩展的模型以及复杂系统流固耦合模型，动态表征多因素影响下转向酸与固体转向剂协同转向行为。

针对复杂碳酸盐岩储层埋藏深、温度高、孔洞缝发育、矿物组成分布不均等特点，转向酸化技术是其建产、稳产、增产的关键技术手段。基于反应动力学理论，开展转向酸酸岩反应动力学测试，建立反应速率机理模型；基于转向酸流变行为测试，建立其粘度变化数学模型。基于长岩心、并联岩心流动反应实验，借助高能CT扫描技术，剖析酸蚀蚓孔扩展规律，并建立非均质储层酸蚀蚓孔立体延伸数学模型。采用大型可视化多裂缝物模试验和高温高压漏失实验，研究固体转向剂在多尺度裂缝内运移物理转向规律，并与流固耦合模拟结果对比分析。构建高温高压大尺寸多多角度、多裂缝系统，开展转向酸与固体转向剂协同转向模拟试验。综合考虑储层岩矿和空间结构的发育特征，建立反应真实岩石特性的地质模型，同时结合转向酸酸岩反应速率机理模型、转向酸粘度变化数学模型、三维蚓孔立体延伸扩展的模型以及复杂系统流固耦合模型，动态表征多因素影响下转向酸与固体转向剂协同转向行为。