In view of the actual cases of a great quantity of liquid loading at bottomhole in the high temperature and gas condensate wells at the later stage of development,a foam agent which has good foaming ability and stability under the condition of the high temperature and condensate oil is developed,which could largely improve the gas recovery factor and keep the wells stable and of high recovery rate. In this paper,we have evaluated the foaming ability and stability of many kinds of foam agents under the condition of different concentration and condensate oil content by improving Ross-miles method. Finally,we have selected SDS,CAB,SBFA-30 to make compositional formulation and added a certain amount of polymer(PVA)to increase the stability of the foam. We have got the optimized formulation(0.1%SDS+0.1%CAB+0.05%SBFA-30+0.02PVA)by orthogonal experiment design and evaluated the foaming force under the condition of high temperature and condensate oil. The results showed that it could keep good foaming and foam stabilization performance under the condition of the 150℃and 50%high condensate oil.%针对国内高温深井、高凝析油气井开采后期井底产生大量积液影响正常生产的实际情况，研制出了一种在高温高含凝析油条件下起泡性和泡沫稳定性良好的泡排剂，能显著提高气井采收率，稳定气井产量。采用改进Ross-miles法对各种单一起泡剂的起泡性和泡沫稳定性进行评价筛选，最终选用SDS、CAB、SBFA-30进行复配，为了进一步提高泡沫的稳定性，还添加聚乙烯醇（PVA）作为稳泡剂。通过正交实验优化出最佳复配体系为0.1%SDS+0.1%CAB+0.05%SBFA-30+0.02%PVA，实验结果表明，该复配体系在150℃、凝析油体积分数高达50%具有良好的起泡性和稳泡性。
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