Abstract: Technical challenges related to gas channeling and CO2 corrosion were encountered in liner cementing operations in slime holes in the Dongfang 13-1 Gas Field of the Yinggehai Basin. To eliminate these problems, high density and high efficiency flushing fluids and innovative temperature-resistance high density cement slurry systems were developed to cope with rotating liner cementing techniques for liner cementing in HTHP wells. With the deployment of latex particles, non-penetrating agents, ultra-fine filling particles and expansion agents in the temperature-resistant high density cement, impermeability and resistance to CO2 of cement slurry could be enhanced significantly. In addition, proper grading of particles would dramatically enhance the stability of the cement slurry system. Experimental results showed that the cement slurry with a density of 2.20 g/cm3 could endure high temperatures up to 160℃ with a compressive strength of 15.1 MPa in 24 hours and anti-gas channeling factor of 0.59. The newly developed cementing techniques have been applied in 6 wells in the Dongfang 13-1 Gas Field in the South China Sea. Logging data showed cementing operations in high-pressure gas formations and in overlapping intervals were fully qualified with no abnormal pressures observed at the wellhead during production. Research results and application performances demonstrated that the newly developed liner cementing techniques for HTHP gas wells could meet operational requirements in the Dongfang 13-1 Gas Field.