针对锦45区块于I组稠油油藏，对自制的DQS发泡剂体系进行稳定性评价及注入参数优选。并开展了蒸汽驱过程中伴注非凝气体和化学剂驱油物理模拟实验。发泡剂特性实验结果表明．DQS形成的泡沫在300℃时仍然保持了较高的稳定性；发泡剂的适宜发泡浓度是1．2％；在以N₂为气源的条件下，气液比在2～3的范围内具有较高的阻力因子，可以满足封堵要求。选取N₂和CO₂分别进行蒸汽泡沫驱实验，结果表明，两者均能大幅度提高蒸汽驱驱油效率，伴注N 较单一蒸汽驱驱油效率提高16.7%，而伴注co₂ 则提高了18.1%。两者的经济评价结果表明，选取CO₂作为非凝气体更为经济合理。

Aimed at the heavy oil reservoir of Yu I group in Jin 45 block，thermostability appraisement and injection parameter optimization for self-produced foaming agent system called DQS are carried out，and then noneondensing gas is injected with DQS to improve displacement eficiency for recovering heavy oil during steam flooding in the physical model experiments．The experiment result of DQS shows that the thermostability is still excellent at 300℃．and the suitable foaming density is 1.2％．If N₂ is used as gas source．the gas—liquid ratio should be in the range from 2 to 3 for achieving a relatively large resistance factor and satisfying the requirements of plugging．N₂ and CO₂ selected as noncondensing gas，is injected respectively with DQS during steam flooding in the experiments．The result shows that both could obviously improve oil displacement eficiency．If N₂ is injected with DQS，it is 1 6．7％more than that of steam flooding．If CO₂ is injected with DQS it increases by 1 8．1％in comparison with steam flooding．Economic evaluation result shows that C0₂ is the better choice compared with N₂ to be injected with DQS for improving oil displacement eficiency during steam flooding．