Abstract: To improve the cementing quality of shale gas wells,mud cake curing agent was applied in the well cementing of φ244.5 mm casing in Well Yuanye HF-1.Based on the drilling fluid and cement slurry used in Well Yuanye HF-1 and API specification 10,the effects of mud cake curing agents(GJ-Ⅰ and GJ-Ⅱ) on bond strength at cement-formation interface was evaluated by the self-established evaluation method.The evaluation results showed that when the curing time was 3,7,15 and 30 days,compared with cementing without curing agent,the bond strength of cement-formation interface with mud cake curing agent remarkably increased by 629.03%,222.37%,241.43% and 273.33%,respectively.72 hours after cementing,acoustic amplitude variable density logging(CBL/VDL)was carried out.The logging results showed that the proportion of cementing section with relative acoustic amplitude of less than 15% is 93.49%,indicating good cementing quality.The study showed that mud cake curing agent could greatly improve the bond strength at cement-formation interface and thus the cementing quality of shale gas wells.