表面张力和接触角对酸液助排率的影响研究

利用不同类型表面活性剂对表面张力和润湿性影响的差异,研究了酸液表面张力、润湿性与助排率的关系.研究中通过测定非离子、氟碳和阳离子三类表面活性剂对酸液表面张力、酸岩接触角和助排率的影响,证明表面张力降低和接触角增加对酸液助排率的影响同样重要,并建立了相应的定量关系式.将上述研究结论应用于高性能助排剂的开发,优化实验表明FX-2、CTAB和OP-8质量比为1∶2∶2复配时,使用质量浓度为800 mg/L,助排率可达90%以上.

Influences of surface tension of acid solution and contact angle of rock on the cleanup efficiency of surfactant

The influence of different kinds of surfactant on the surface tension of acid solution and the contact angle of rock is different.The relationship between the cleanup efficiency and the surface tension and the contact angle is studied.The surface tension and the contact angle and the cleanup efficiencies of nonionic surfactant,fluorcarbon surfactant and cationic surfactant are measured.The results indicate that and the increase of the contact angle has the same importance as the decrease of the surface tension to the cleanup efficiency of the acid containing surfactant.The quantitative relationship between the cleanup efficiency and the surface tension and the contact angle is presented.The study result of this paper is applied to the development of high-performance cleanup additive,and the optimized experiments show that the cleanup efficiency can reach to 90% when the mass ratio of FX-2 to CTAB to OP-8 is 1∶2∶2 and the concentration of surfactant is 800 mg/L.