摘要：
对非常规油气藏压裂返排液的特点尧物性及污染指标进行分析,提出采用破胶混凝技术对返排液进行预处理分离,其水相可再配制压裂液用于现场压裂施工.研究了破胶混凝剂及其优化工艺和压裂液再配制技术,评价了再配制压裂液的主要技术指标及性能,并与清水配制压裂液进行对比.结果表明,再配制压裂液具有基液黏度高,抗温性能较强,易于破胶尧返排,残渣量较低及防膨性好等特点.该技术能够实现废液资源化利用,达到节能减排的效果.
关键词:
非常规油气藏,
压裂返排液,
破胶混凝
Abstract:
The characteristics,physical properties and pollution indexes of fracturing flow-back fluid from uncon- ventional oil and gas reservoirs has been analyzed. It is proposed that using gel breaking coagulation process for the pretreatment separation should be conducted. The aqueous phase can re-prepare fracturing fluid for being used in site operation. The gel breaking coagulant and its optimized process and fracturing fluid re-preparation process are researched. The main technical indexes and capacities of the re-prepared fracturing fluid are evaluated,and com- pared with clarified water re-prepared fracturing liquid. The results show that re-prepared fracturing fluid is charac- terized by high viscosity and strong temperature resistance,easy gel-breaking,and easy to flow back,low residue, and excellent anti-swelling characteristic,etc.,realizing the target of resource utilization of waste liquid,and,as a result,achieving energy saving and emission reduction.
Key words:
unconventional oil and gas reservoirs,
fracturing flow-back fluid,
gel breaking coagulation
中图分类号:
张太亮, 李泽锋, 徐俊, 郭威, 欧阳铖翼. 非常规油气藏压裂返排液资源化利用研究[J]. 工业水处理, 2014, 34(12): 78-81.
Zhang Tailiang, Li Zefeng, Xu Jun, Guo Wei, Ouyang Chengyi. Research on the resource utilization of fracturing flow-back fluid fromunconventional oil and gas reservoirs[J]. INDUSTRIAL WATER TREATMENT, 2014, 34(12): 78-81.