Halahatang oilfield is characterized by high temperature and high salinity, and the application of conventional profile control agent is difficult. By improving the properties of oil-bearing sludge and selecting and matching polyacrylamide gel system, the oil-bearing sludge gel system with temperature and salt resistance is studied, which can be used for profile control and water plugging of high-temperature and high-salt oil reservoirs.The optimized formula composition (mass fraction) was as follows: 20% oil sludge+0.8% high temperature resistant polyacrylamide NWX-1+0.2% phenolic resin +5% modified polymer monomer (AMPS)+0.01% initiator potassium persulfate + 0.5% enhancer montmorillonite. The microstructure, rheology and breakthrough pressure of the system were evaluated. The results show that the gelation time of the system is controllable. The microstructure shows a dense three-dimensional network structure with higher strength. The viscoelastic modulus of the system can be improved effectively by compounding the reinforcing agent, and the system can recover after creep. The breakthrough pressure can reach 3240 kPa/m.