针对海上低渗透油藏水气交替对气窜调控能力较弱以及常规气窜封堵体系耐温等级较差的问题，采用水气交替及微球复合驱进行气窜治理，首先通过对水气交替轮次、注入段塞进行优化，优选出合适的工艺参数，在此基础上进行水气交替及纳米乳液微球复合调控气窜。结果表明优选出水气交替轮次为二轮次，水气交替段塞大小0.2 PV，注入时机越早，封窜效果越好，水气交替后采取耐温耐盐微球进行复合封窜，复合封窜最终采收率较连续气驱增幅26.84%，该技术通过水气交替和微球调驱对气窜通道进行复合调控，最大程度地动用储层中的剩余油，提高天然气驱效率，为复杂储层条件下的气驱开发提供了技术支持。

In view of the weak ability of water-gas alternations to control gas channeling in offshore low permeability reservoir and the poor temperature resistance level of conventional gas channeling plugging system, an experiment was designed to control gas channeling by using water-gas alternations and microsphere compound flooding. Firstly, through optimizing the water-gas alternations and injection slug, appropriate process parameters were optimized, and on this basis, water-gas alternations and nano-emulsion microsphere was used to compositely control gas channeling. The results show that the optimal water-gas alternating cycle is two cycles, the size of the water-gas alternating slug is 0.2 PV, and the earlier the injection time, the better the sealing and channeling effect. After water-gas alternating, the composite sealing and channeling was carried out with temperature and salt-resistant microspheres, and the final displacement efficiency of the composite sealing and channeling is increased by 26.84% compared with that of continuous gas flooding. The remaining oil in the reservoir can be utilized to the maximum extent to improve the efficiency of gas drive, which provides technical support for gas drive development under complex reservoir conditions.