High-Temperature Large Temperature Difference Cement Slurry System

An intelligent retarder that adjusts its retarding effect with temperature changes is employed to form a high-temperature, large-temperature-difference cement slurry system. This system shows minimal sensitivity to variations in temperature, pressure, water quality, etc., resulting in a shortened thickening time of the cement slurry. It exhibits rapid strength development at the top of long cementing sections and is suitable for low-density, regular-density, and high-density cement slurries. In recent years, it has been widely applied in deep shale gas blocks in Sichuan-Chongqing, Tarim Basin in Xinjiang, oilfields in Qinghai, and Jidong Oilfield, demonstrating a high-quality well cementing rate.