随着勘探开发向深层的发展,超高温高密度油基钻井液越来越被重视,本文室内评价了一套超高温高密度油基钻井液,温度200℃情况下,可达到密度2.6g/cm3,钻井液中含水量最大10%;高温稳定性、悬浮性及流变性好,CaCL2加量主要考虑平衡地层活度,对钻井液性能影响不大;与国外同类体系性能相当。适用于高温高密度深井。 With the exploration and development to the deeper development, ultra-high temperature and high density oil-based drilling fluid is more and more valued. In this paper, a set of ultra-high temperature and high-density oil-based drilling fluid is evaluated indoors. Under the condition of 200 ℃, cm3. The maximum water content in drilling fluid is 10%. High temperature stability, suspensibility and rheological properties are good. The amount of CaCL2 mainly accounts for balanced formation activity, which has little effect on drilling fluid properties. Suitable for high temperature and high density deep well.