Abstract:Aiming at the problems of high reservoir temperature, unbalanced injection and production, and prominent contradictions between layers in the late development stage of high water-cut oil reservoirs in medium and high permeability reservoirs, a new type of high temperature resistant and high viscoelastic plugging control agent was prepared and experimental research was carried out. Experiments have found that the gelling time of the plugging control agent is controllable, can achieve positioning plugging, has good plugging performance, effectively controls the advantageous water flow channels of the reservoir, and improves the water absorption profile. The temperature resistance can reach more than 150℃, and it has good sealing performance and pressure bearing performance. After the shallow profile control of Well L90-58 took effect, the average daily oil The plugging agent has obvious effect in field application, production increased by 3.38t, the water cut decreased by 19.15%, and a good precipitation and oil increase effect was achieved, which has certain practical significance for the development of the oilfield.