长庆油田气井钻探深度逐年增加,井底温度压力随之升高,对固井缓凝剂的综合性能要求越来越高。为了方便现场固井施工,引入中高温固体缓凝剂BCR-210S,从稠化时间可调性、加量敏感性、对水泥石早期强度影响、水泥浆综合性能等方面进行了评价,并对现场应用情况进行了探讨。 The well drilling depth of Changqing oilfield increases year by year, and the temperature and pressure at the bottom of the well increases with it. Therefore, the comprehensive performance of cementing retarder is getting higher and higher. In order to facilitate on-site cementing construction, BCR-210S, a medium and high temperature solid retarder, was introduced to evaluate the influence of the thickening time, the added sensitivity, the early strength of cement stone and the comprehensive performance of cement slurry. Field application was discussed.