地面交联酸与叙利亚灰岩的反应动力学

Kinetics of Chemical Reaction between Surface Cross -Linked Acid and Limestone from Syria

蒋睿 蒋建方 吴川 张祖国 张汝生 刘光普 李龙 高翔

JIANG Rui JIANG Jianfang WU Chuan ZHANG Zuguo ZHANG Rusheng LIU Guangpu LI Long GAO Xiang

采用旋转岩盘装置在60、90、120 和150℃进行了地面交联酸与叙利亚灰岩的反应动力学实验，建立了相应温度下表征该交联酸液与目的层灰岩反应的动力学方程。结果表明，反应体系的温度对其反应速率有重要影响，温度越高，反应越快，60、90、120 和150℃下地面交联酸与灰岩的反应速率常数分别为5.68× 10-8（mol/L）-1.51/（cm2·s）、1.94× 10-7（mol/L）-1.03/（cm2·s）、2.76× 10-7（mol/L）-0.72/（cm2·s）和1.62× 10-6（mol/L）-0.42/（cm2·s），反应级数分别为1.51、1.03、0.72和0.42；与常规胶凝酸相比，60℃时地面交联酸的反应速率常数小1 个数量级，120℃时小2个数量级，缓速性优良，体现了在高温深井碳酸盐岩油藏酸压的优势，对增大酸压有效作用距离更为有利。表3 参9

The reaction kinetic experiments between a surface cross-linked acid and Syria limestone were conducted by using a rotating disc at temperatures of 60℃，90℃，120℃and 150℃. Reaction kinetic equations were deduced to demonstrate the reaction characteristics of surface cross-link acid and limestone from target layer of Syria at corresponding temperatures. The results indicated that experiment temperature was an important influence factor on the reaction rate. The higher temperature ，the faster reaction was. Corresponding reacting rate constant of the acid and limestone were 5.68× 10-8（mol/L）-1.51/（cm2·s）、1.94× 10-7（mol/L）-1.03/（cm2·s）、2.76× 10-7（mol/L）-0.72/（cm2·s）和1.62× 10-6（mol/L）-0.42/（cm2·s），and the reacting orders were 1.51，1.03，0.72 and 0.42respectively at above temperatures. The reacting rate constant of surface cross-link acid was smaller about 1 order of magnitude than that of conventional gelling acid at60℃，and 2 order of magnitude at120℃compared with earlier experiment results ，which showed the better retarding performance. Therefore ，the surface cross-linked acid possessed the advantages of acid fracturing stimulation in high temperature deep well of carbonate reservoirs in aspect of increasing the effective acid-etched distance.