阴离子型清洁压裂液耐温性研究进展

Research Progress on Temperature Resistance of Anionic Cleaning Fracturing Fluid

摘要:

阴离子型清洁压裂液是一种基于阴离子黏弹性表面活性剂的非聚合物水基压裂液，具有配置简单，易返排、无残渣、冻胶黏度低且弹性好、压裂性能稳定等特性。随着低压低渗油田开采困难和油井开采深度的不断增加，阴离子型清洁压裂液（Anionic Viscoelastic Surfactant Fluid，简称AVES）的耐温性成为课题研究中的重要方面。对典型非聚AVES压裂液和新型含聚AVES压裂液两大体系的应用性能和特征进行综述，列表阐明各类AVES压裂液在油田应用中的优势与不足。针对国内外AVES压裂液高温下压裂效果不明显、胶束稳定性差及主剂合成复杂等状况，提出改进阴离子侧链、研制不对称结构双子阴离子及开发新型纳米粒子等方法，从而达到简化体系配制、增加其耐温性与稳定性的目的。

Abstract:

Anionic clean fracturing fluid is a non-polymer water-based fracturing fluid based on anionic viscoelastic surfactant. It has such characteristics as simple configuration, easy flowback, no residue, low viscosity and good elasticity of gel, stable fracturing performance and so on.With the increasing of the difficulties of low pressure and low permeability oil field and the depth of oil well exploitation, the temperature resistance of Anionic Viscoelastic Surfactant Fluid (for short:AVES) has become an important aspect of the research topic.The application performance and characteristics of typical non-polymer AVES fracturing fluids and new polymer AVES fracturing fluids are reviewed, and the advantages and disadvantages of various types of AVES fracturing fluids in oilfield applications are illustrated in the list.In view of the situation that the fracturing effect of AVES fracturing fluid is not obvious at high temperature, the micellar stability is poor, and the synthesis of main agent is complex, the methods of improving the anion side chain, developing asymmetric twin anions and developing new nanoparticles are proposed, so as to simplify the system preparation and increase its temperature resistance and stability.