Abstract:During the exploitation process of heavy oil reservoirs, the thermal stress generated by the injection of high-temperature steam often leads to the failure of cement. Aiming at this problem, a type of poly aryl ether ketone high-temperature resistant resin powder was selected as elastic material to be added to the cement slurry, and the influence of resin powder on the conventional properties, mechanical properties, and high-temperature resistance of the cement was studied. The results showed that when 4% resin powder was added to the cement slurry, the consistency coefficient of the cement slurry was 0.80Pa·sn, the filtration loss was 34mL, the thickening time was 225 minutes, and the compressive strength was 17.69MPa. The conventional performance of the cement slurry met the requirements of on-site operations. The elastic modulus of cement stone can be reduced to below 4GPa, indicating that the addition of resin powder can improve the elasticity of cement stone. After 28 days of high-temperature curing at 320 ℃, the compressive strength of cement stone was 18.68 MPa, the impact strength was 1.97 KJ/m2, and the elastic modulus was 3.67GPa,which exhibited good high-temperature resistant strength and elasticity. Compared with the cement stone without resin powder, the permeability of the cement stone decreased by 61.3%, the elastic modulus decreased by 39.1%, and the peak strain increased by 119.0%. The addition of resin powder reduced the brittleness of cement stone, increased its elasticity and capability of anti-deformation, and can effectively enhance the ability of cement stone to resist thermal stress damage during steam injection operations in thermal recovery wells.