某油田采用高Fe、高CO2地下水作为注水补充水源,类似水质的综合处理工艺在国内外应用较少,因此制定经济合理的水处理工艺十分必要。通过调研脱气处理设施、除Fe设施,经过工艺对比、实验模拟,研究出一套技术可靠、经济可行的地下水综合处理工艺。模拟实验验证某油田地下水总Fe含量从71 mg/L降至0.5 mg/L,游离CO2含量从225 mg/L降至10 mg/L,总悬浮固体(Total Suspended Solid,TSS)含量从98 mg/L降至 10 mg/L,溶解氧含量从1 mg/L降至0.05 mg/L,均达到油田注水指标要求。研究结果对高Fe、高CO2地下水处理的工艺路线选择具有参考意义。

 Aquifer water with high iron and high CO2 content is used as the source of injection water for an oilfield in Iraq. As similar water quality treatment experience is rare in projects both at home and abroad, it is necessary to develop a practical and economical process system for water treatment. Via the investigation for degassing treatment facilities and iron removal facilities; after process comparison and simulation experiments, an economically viable and technically robust water treatment technology was proposed. Through simulation experiments, it is demonstrated that the treatment process can reach the following treatment performance indicators: Total iron content was reduced from 71 mg/L to 0.5 mg/L, CO2 from 225 mg/L to 10 mg/L, TSS from 98 mg/L to 10 mg/L, and dissolved oxygen from 1 mg/L to 0.05 mg/L, meeting the specifications of the injection water of the oil field. The research results provide reference for the treatment process flow selection of aquifer water with high iron and high CO2.