为满足超稠油蒸汽吞吐防汽窜的需要，研制出一种耐酸耐高温泡沫剂配方体系KAF-2，对其发泡性能、泡沫稳定性以及高温下的封堵性能进行了研究。实验结果表明，利用去离子水和矿化度5 000 mg/L的水配制的酸性溶液（pH=3）、泡沫剂质量分数为0.5%时，均具有较好的发泡性能和泡沫稳定性；高温下（200℃）岩心封堵性能实验结果表明，当泡沫剂的质量分数为0.5%、KAF-2体系的阻力因子达到20以上时，具有较好的岩心封堵性能。在"泡沫剂+二氧化碳"辅助蒸汽吞吐现场试验表明，与现场用泡沫剂相比，注入KAF-2体系后，注汽压力上升、周期产油量增加、周期生产时间延长，在考虑自然递减的情况下，杜80-38-54井和杜813-43-54井措施后的周期增油率分别达到26.1%和20.3%。

To prevent steam channeling from happening at steam huff-puff of super heavy oil,an acid-resistant and high temperature-resistant foaming agent system KAF-2 is developed.Its foaming performance,foam stability and core plugging performance at high temperature are studied.Experimental results show that KAF-2 system exhibits good foaming performance and foam stability when the mass fraction of foaming agent is 0.5%,and the acidic solution (pH=3) is prepared by deionized water and water with a mineralization degree of 5 000 mg·L^-1.It is found from core plugging performance experiment at high temperature (200℃) that the system shows good plugging performance when the mass fraction of foaming agent is 0.5%,and the resistance factor of KAF-2 system exceeds 20.The spot test of KAF-2 in "foaming agent + carbon dioxide" assisted steam huff-puff shows that,compared with the foaming agent used in the spot,the injection of KAF-2 system increases steam injection pressure and periodic oil production,as well prolongs the periodic production time under the similar displacement conditions.Considering the natural decline,the growth rates of periodic oil production of Well Du 80-38-54 and Well Du 813-43-54 reach 26.1% and 20.3%,respectively.