In consideration of the high oil content of oily sludge and a lack of oil and water removal facilities in Dongfenggang oilfield，the oily sludge mixture was directly subjected to mechanical sieving and grinding，emulsification and suspension treatment without preliminary oil-removing process. An oily sludge profile control system prepared mainly by mechanical shearing method was established. The operating conditions of oily sludge profile control system were optimized，and its injection，plugging and profile-control and displacement performances were evaluated. The results showed that the suspension time of profile control system，which was prepared by adding 0.2% acrylate copolymer suspension （SF） and 0.2% triethanolamine monostearate emulsifier（FM-20）into the oily sludge，was greater than 10 h at room temperature and 90°C. During the preparation of the oily sludge profile control system by mechanical shearing，the optimum conditions included 4%—8% the mass ratio of oil-bearing sludge to water（solid-liquid ratio），around 6400 r/min shear speed，and about 3 min shear time. The oily sludge profile control system possessed good injection and plugging properties. After the system was injected into a single sand-filled pipe，the plugging rate of sand filling pipes with different permeability reached over 90%. The recovery degree of secondary water flooding increased by 25.01% . This method possessed the advantages of simple operation，low cost and reduced secondary pollution，exhibiting excellent application prospects for the treatment and resource utilization of oily sludge