Abstract: Focusing on the study of polymer fracturing fluid, the G551 polymer thickener and the G552 organic Al-Zr crosslinker were developed with the advantages of instant dissolution. They formed RP120 – a new type recyclable polymer fracturing fluid characterized for good temperature tolerance, salt stability, low damage, low residue, continuous mixing and recovered for re-application -- to solve the problems existing in the fracturing flowback fluid treatment in Changqing Gas Field. The technological process of fracturing service is “continuous mixing – fracturing service – flowback fluid recycle for re-application. ” It has been cumulatively used in 191 intervals (sections) at 51 wells, effectively solving a series of bottlenecks, such as complexity of flowback fluid treatment process and low recycle rate. The application rate of recycled flowback fluid reaches 95 percent, providing technical support for clean production at Chang Gas Field.

Key words: fracturing fluid, polymer, recyclable, flowback fluid, clean production

摘要： 针对长庆气田压裂返排液处理难题, 以聚合物压裂液为研究对象, 开发出具有速溶、耐盐特点的聚合物 稠化剂G551, 研发有机铝锆复合交联剂G552, 建立新型的具有耐温、耐盐、低残渣、低伤害、可连续混配、可回收再 利用等优点的RP120 可回收压裂液, 形成“连续混配—压裂施工—返排液回收利用” 的施工工艺技术流程, 累计应用 51 井191 层(段), 有效解决了返排液处理流程复杂、回用率低的难题, 回收的返排液再利用率达95%, 为长庆气田清 洁化生产提供了技术支持。

关键词: 压裂液; 聚合物; 可回收; 返排液; 清洁化生产