耐高温型气井泡沫排水剂的研制与性能评价

Development and performance evaluation of high temperature resistant gas well foam drainage agent

对一种发泡剂主剂月桂酰胺丙基甜菜碱(LAB)与两种发泡剂辅剂十二烷基硫酸钠(SDS)、月桂酰胺丙基氧化胺(LAO)进行复配,得到气井泡沫排水剂配方。并评价其静态发泡能力与动态携液能力,结果为质量分数70%的LAB与质量分数30%的SDS形成的发泡剂罗氏泡高138mm,搅拌泡沫体积480mL、半衰期520s;在通气量为8L/min的条件下对w(凝析油)=10%的地层水携液量达到82g。通过实验研究了不同w(凝析油)与不同w(发泡剂)的携液量之间关系,确定了在w(发泡剂)=2%、w(凝析油)=40%条件下携液量达到75g。并且研究了通气量与携液量之间的关系,确定了当通气量达到8～10L/min时泡沫排水剂的携液量可达到最佳。最后发泡剂经过120℃老化12h之后仍可保持原有性能基本不变,可满足吉林油田气井泡沫排水使用要求。

A main foaming agent,lauryl propyl propyl betaine(LAB),and two blowing agent adjuvants,sodium dodecyl sulfate(SDS)and lauramide propyl amine oxide(LAO)are compounded to obtain a gas well foam drainage formulation,and its static foaming ability and dynamic liquid carrying capacity were evaluated.The results show that the foaming agent with 70% LAB and 30% SDS has138mm foam height with ROSS-Miles equipment;stirring foam volume can reach480mL,the half life of foam is 520s.When the ventilation volume is 8L/min the liquid carrying capacity of the10%condensate oil content reached 82g.It was determined that the mass fraction of the blowing agent reached 2% and the liquid carrying amount of 75g could be achieved under the condition of 40% condensate.Meanwhile,the relationship of gas flow and liquid carrying mass is also studied,and the optimized gas flow for foam drainage is8~10L/min.The foam drainage agent can retain the performance after 120℃ aging for 12h,these performances can satisfy the requirements for gas well foam drainage in Jilin Oil Field.