压裂返排液处理与回用技术实验
Environmental Protection of Oil & Gas Fields(2018)
Abstract
针对压裂返排液回用处理工艺技术,采用S M17-1 H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20 min,加入400 mg/L工业级PAC,4 mg/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1.25 mg/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.
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