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钻井过程中钻遇高压高钙盐水层,钻井液污染严重,用常规方法多次处理钻井液均未成功,应用硫酸盐钻井液体系,成功解决钻井液污染问题,为钻遇大段石膏层,盐岩层、芒硝层等高含钙化学盐类地层找到一套切实可行的技术方法。室内对该体系配方进行优化完善,同时评价了该体系优选配方抗钙、抗温、抑制性、油气层保护效果等性能。
During the drilling process, the high-pressure and high-calcium brine layer was drilled and the drilling fluid was seriously polluted. The drilling fluid was not treated successfully by the conventional method. The drilling fluid system was successfully applied to solve the problem of drilling fluid contamination. Salt rock, Glauber’s salt and other high-calcium chemical salts strata to find a set of practical technical methods. The formula of this system was optimized and perfected indoors, and the properties of anti-calcium, anti-temperature, inhibitory and protective effects of oil and gas in the system were also evaluated.