Abstract: The components of flowback liquid in oil/water wells acidizing operation is complicated,and difficult to be treated. The concept that treatment on spot,recycling and reinjection on spot at the well-mouth is put forward. The flowback liquid samples from 11 oil/water wells are analyzed,the sedimentation-multifunctional processing system-filtration process selected,the neutralization agent,oxidant,flocculants and sludge concentrate optimized by field tests,skidding and mounting treatment equipment developed,and on site practices implemented 15 well-times. The treated flowback liquid pH is 6-8,and the mass concentrations of both oil and SS materials are lower than 10 mg/L. As a result,the recycling on spot and reinjection on spot are now realized.

Key words: acidizing operation, flowback liquid, on-site treatment, skidding and mounting treatment equipment, recycling and reinjection

摘要： 油、水井酸化作业返排液成分复杂，处理难度大。提出在井口就地处理、就地回用回注的思路。对11口油、水井酸化返排液进行了分析，确定了沉降预分离-多功能处理系统-多级过滤工艺，优选了中和剂、氧化剂、絮凝剂和污泥浓缩剂，研制了撬装处理设备，现场实施15井次，处理后返排液pH 6~8，油和悬浮物质量浓度均低于10 mg/L，实现了就地回用回注。

关键词: 酸化作业, 返排液, 就地处理, 撬装处理设备, 回用回注

CLC Number: 

• TE357.6