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油田采出水处理设备及工艺优化分析
Analysis of equipment and process optimization for oilfield produced water treatment
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- DOI:
- 作者:
- 骆 涛，张含明，张玉香，唐芏涛，李姝娴，贾闯洋
Luo Tao, Zhang Hanming, Zhang Yuxiang, Tang Dutao, Li Shuxian, Jia Chuangyang
- 作者单位:
- 中国石油青海油田油气工艺研究院，甘肃敦煌 736202
- 关键词:
- 采出水处理；旋流分离；气浮净化；过滤技术；工艺优化
produced water treatment; hydrocyclone; air flotation purification; filtration technology; process optimization
- 摘要:
- 高原油田采出水具有矿化度高、含油量高等特点，联合站水处理系统存在运行效率低、出水水质波动
幅度大等问题。基于现场调研与理论分析，开展采出水处理设备选型及工艺流程研究，通过对比重力沉降、旋
流分离、气浮净化及过滤等核心处理单元的技术参数与适用条件，建立采出水处理效率预测和计算模型，并优
化工艺流程，利用现场实际运行数据完成模型验证。结果表明，优化后的隔油-旋流-气浮-过滤四级处理工艺
可将采出水含油量（质量浓度）由入口的850~1 200 mg/L降至5 mg/L以下，悬浮物含量（质量浓度）控制在
3 mg/L以内，各项指标均满足回注水质标准要求。优化后的工艺技术方案对高矿化度油田采出水处理具有实际
工程指导意义。
Produced water from plateau oilfields is characterized by high mineralization and oil content, and the produced water treatment system at the central processing station suffers from problems such as low operational efficiency and fluctuating effluent quality. By conducting field investigation and theoretical analysis, this paper carries out a study on the selection of treatment equipment and the design of treatment processes for produced water. By comparing and analyzing the technical parameters and applicable conditions of core treatment units, including gravity sedimentation, hydrocyclone separation, air flotation purification, and filtration, a prediction and optimization model for produced water treatment efficiency is built and verified by combining actual field operating data. The results indicate that the optimized four-stage treatment process consisting of oil-water separation, hydrocyclone, air flotation and filtration is capable of reducing the oil content (mass concentration) of produced water from 850-1 200 mg/L at the inlet to less than 5 mg/L, while the content of suspended solids (mass concentration) is controlled within 3 mg/L, with all indicators meeting the requirements of the reinjection water quality standard. The optimized process scheme provides practical engineering guidance for the treatment of produced water from highly mineralized oilfields.