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合成聚合物(如聚丙烯酰胺及其衍生物)在温度低于50℃,渗透率小于1md油层条件下作压裂液时,使用常规破胶剂(无机氧化剂)往往破胶效果不好。长庆油田研制成功的新型高效CB破胶剂,在25℃以上即能将各类水溶性聚合物溶液(天然的或改性的植物胶,纤维素,合成聚合物)的冻胶彻底降解,对油层伤害可降至最低。室内试验及现场实践应用均获得较好的结果。
Synthetic polymers (such as polyacrylamide and its derivatives) at temperatures below 50 ℃, the permeability of less than 1md reservoir conditions for the fracturing fluid, the use of conventional gel breaker (inorganic oxidants) often gel breaking effect is not good. Changqing Oilfield successfully developed a new type of high efficiency CB gel breaker above 25 ℃ that can be all kinds of water-soluble polymer solution (natural or modified plant glue, cellulose, synthetic polymers) jelly degradation completely, Damage to the reservoir can be reduced to a minimum. Indoor experiments and field practical applications have achieved good results.