耐油泡排剂Facam的制备和性能研究

Preparation and Research on the Performance of Oil Resistant Foam Drainage Agent Facam

为提高凝析气井的泡沫排液效果,研制阴离子、阳离子与两性表面活性剂三元复配耐油泡排剂(Facam),采用泡沫仪、界面张力仪、黏度仪等测试其泡沫性能、耐油性能和泡沫乳液黏度,并应用于凝析气井排液采气作业。结果显示,与两性表面活性剂(LB1)相比,油滴在Facam液膜上的铺展系数小于0,表明在高含凝析油条件下Facam的泡沫稳定性得到提高,同时,Facam产生的乳液黏度较低,可降低由摩擦阻力损失引起的油管压降。现场气井注入Facam后,油套压差(ΔP_(c-t))从1.00 MPa降低到0.28 MPa,产气月度递减率降低到2.86%,排液采气效果优于LB_(1),有效保证气井稳产。

In order to improve the foam deliquification effect of condensate gas wells,a ternary oil resistant foam drainage agent(Facam)composed of anionic,cationic and amphoteric surfactants was developed.The foam performance,oil resistance and viscosity of foam lotion were tested by foam meter,interfacial tension meter and viscosity meter,and was applied to condensate gas wells for liquid drainage and gas production.The results showed that compared with the amphoteric surfactant formula(LB_(1)),the spread coefficient of oil droplets on the Facam liquid film was negative,which indicated that the stability of the foam of Facam was improved under the condition of high condensate oil content.At the same time,the emulsion viscosity generated by Facam was lower,which could reduce the pressure drop of the tubing caused by the friction resistance loss.After Facam injection,the oil casing pressure difference(ΔP_(c-t))decreased from 1.00 MPa to 0.28 MPa,the monthly gas production decline rate decreased to 2.86%,and the deliquification effect was better than that of LB1,effectively ensuring stable gas production.