表面活性剂压裂液机理与携砂性能研究

1. 北京大学工学院能源与资源工程系，北京海淀100871；

2. 中国石油煤层气有限责任公司勘探开发项目部，北京朝阳100028；

3.“油气藏地质及开发工程”国家重点实验室· 西南石油大学，四川成都610500；

4. 西南石油大学石油工程学院，四川成都610500

1. Department of Energy and Resources Engineering, College of Engineering, Peking University, Haidian, Beijing 100871, China

2. Exploration and Development Department of PetroChina CoalBed Methane Company Limited, Chaoyang, Beijing 100028, China

3. State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Southwest Petroleum University, Chengdu, Sichuan 610500, China

4. School of Petroleum Engineering, Southwest Petroleum University, Chengdu, Sichuan 610500, China

用透射电镜和扫描电镜等多种实验手段，结合表面活性剂溶液的基础理论，通过对表面活性剂内外在宏观与微观关联性质的分析，研究并基本认清了表面活性剂压裂液的成胶机理和破胶机理；论证了表面活性剂压裂液以弹性携砂为主的机理，提出了用悬浮切力来表征表面活性剂压裂液携砂性能的新方法。实验结果表明：在100 s1048576;1 的剪切速率下，胍胶压裂液和表面活性剂压裂液最低携砂黏度分别为100 mPa·s 和30 mPa·s，在同样剪切速率下表面活性剂压裂液的最低携砂黏度比胍胶压裂液小得多。

By applying experimental methods of transmission and scanning electron microscopy and the basic theory of surfactant solution, the relevance of surfactant inhesion and extrinsic in macroscopic and microscopic of surfactant are analyzed, and the gel forming mechanism and the gel breaking mechanism are investigated. The mechanism of surfactant fracturing fluids carrying sand mainly by elastic is demonstrated, and we put forward the new method by using suspending shear force to indicate the sand-carrying capacity of surfactant fracturing fluid. The results