詳細說明

This well belongs to the Langfang Oil Production Plant 4 of PetroChina Huabei Oilfield. The 919-927m layer of this well was once blocked with cement 19.62 cubic meters+1.2 cubic meters resin plugging agent, but 7 attempts were unsuccessful, making the plugging difficult. In June 2021, a sealing construction was carried out, with 20m3 of full well temperature shallow low density casing plugging agent slurry, 20m3 of positive extrusion plugging agent slurry, 4m3 of positive extrusion formation water, and a controlled pressure of 15MPa. The pressure was held for 48 hours and the pressure test was qualified at 15MPa.