摘要
针对压裂返排液回用处理工艺技术,采用SM17-1H井压裂返排液样品,开展了返排液处理与回用实验研究。结果表明,压裂返排液采用氧化破胶、絮凝沉淀、两级精细过滤、脱硼组合工艺处理后,调整压裂返排液pH值为7.2～7.5,添加0.3%工业级NaClO,氧化20min,加入400mg/L工业级PAC,4mg/L分子量800万的阳离子型PAM,上清液透光率可达到94%以上,满足絮凝沉降的要求。处理后水经氧化絮凝处理后,硼离子经WH908或C700树脂吸附除硼后,硼含量降低到1.25mg/L,满足压裂返排液处理后重新配液的要求。此结果为压裂返排液处理和重复利用技术现场实验奠定了基础。
Aiming at the reuse treatment technology of fracturing backflow fluid,the experimental study on the treatment and reuse of backflow fluid was carried out by using the sample of SM17-1H Well fracturing backflow fluid.The results showed that the treated fracturing flureid could meet the requirement of reuse by using the oxidation breaking,flocculating sedimentation,two-stage fine filtration and boron removal.With the condition of 7.2-7.5 pH value,20 min’s oxidation by 0.3% NaClO,400 mg/L PAC and 4 mg/L positive ion PAM which molecule weight is 8 million,the light transmittance of liquid supernatant could reach more than 94%,which could meet the flocculation settling requirements.The boron ions were removed by WH908 or C700 resin adsorption and it could be reduced to 1.25 mg/L,the treated fluid could meet the requriements of recycling.The above results laid the foundation for the field test of fracturing flowback fluid treatment and recyling technology.
作者
李永丰
Li Yongfeng(CNOOC Energy Technology & Services Limited Company Engineering Technology Branch Company)
出处
《油气田环境保护》
CAS
2018年第6期26-28,32,56,共5页
Environmental Protection of Oil & Gas Fields
关键词
压裂返排液
处理
回用
配液水
脱硼
过滤
fracturing flowback fluid
treatment
recycling
recycling water
boron ion removal
filtration
