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利用引进的俄罗斯专利技术,使用国内油脂加工废料与有机碱为原料,合成了油基钻井液用可降解乳化剂CET;制备了CET油基钻井液(CET体系),与大庆现用油基钻井液(大庆体系)进行了组成、基本性能对比。CET体系不含润湿剂,组分数较少(因而生产成本较低),滤失量较低,破乳电压较高(即乳化稳定性较好)。油水比7:3的CET体系和加入2%有机胺稳定剂的油水比6:4的CET体系,破乳电压均在300 V以上;有机土加量增大使破乳电压、视黏度有一定幅度增加,磺化沥青加量增加的影响较小;油水比8:2的CET体系抗黏土(1%~4%)、地层水(1%~4%)污染的能力与大庆体系相当。图1表5参1。
The CET oil-based drilling fluid (CET system) was prepared by using imported patented technology from Russia and the domestic grease processing wastes and organic bases as raw materials to synthesize the CET oil-based degradable emulsifier CET. The oil-based drilling fluid Liquid (Daqing system) were composed of the basic performance comparison. The CET system does not contain a wetting agent, has fewer components (and therefore lower production costs), has lower fluid loss and higher demulsification voltage (ie better emulsion stability). CET system with oil-water ratio of 7: 3 and CET system with 6: 4 oil-water ratio of 2% organic amine stabilizer, the demulsification voltage was above 300 V. The dosage of organic soil increased the demulsification voltage and apparent viscosity to a certain extent (1% ~ 4%) and formation water (1% ~ 4%) in CET system with oil-to-water ratio of 8: 2, which is equivalent to that of Daqing system. Figure 1 Table 5 Reference 1.