渤南油田注水沿程水质劣化原因评价  

Evaluation of the causes of water quality deterioration along the water injection process in Bonan Oilfield

作　　者：陈景军[1] 刘向军[1] 徐福刚[1] CHEN Jingjun;LIU Xiangjun;XU Fugang(Hekou Oil Production Plant of Shengli Oilfield Company,SINOPEC,Dongying 257200,China)

机构地区：[1]中国石化胜利油田分公司河口采油厂,山东东营257200

出　　处：《复杂油气藏》2024年第1期127-130,共4页Complex Hydrocarbon Reservoirs

摘　　要：针对渤南油田注水流程沿程水质劣化的问题,利用色谱、质谱、光谱等分析仪器检测悬浮固体颗粒的组成。结合悬浮固体颗粒组分的检测结果及水质数据,证明水中Fe^(2+)/Fe^(3+)与S^(2-)反应生成硫化物沉淀,是沿程水质劣化的主要原因。目测及机理分析表明水中溶解氧也参与了沉淀反应,即亚铁离子氧化成铁离子进而生成氢氧化铁沉淀。现场采用氧化法去除亚铁离子和硫离子,试验后硫离子含量稳定为0,总铁的质量浓度由10.65 mg/L下降到0.05 mg/L。To solve the problem of water quality deterioration along the water injection process in Bonan Oilfield,the composition of suspended solid particles was detected by analytical instruments such as chromatography,mass spectrometry,spectroscopy,and so on.Combined with the test results of suspended solid particles and water quality data,it is proved that Fe^(2+)/Fe^(3+)in water reacts with S^(2-)to form sulfide precipitation,which is the main cause for the deterioration of water quality along the process.Visual observation and mechanism analysis shows that dissolved oxygen in the water is also involved in the precipitation reaction;ferrous ions are oxidized to iron ions and produce iron hydroxide precipitation.The oxidation method was used in the field to remove ferrous ions and sulfur ions.After the test,the content of sulfur ions was stabilized to 0,and the mass concentration of total iron was decreased from 10.65mg/L to 0.05mg/L.

关 键 词：注水流程 水质 悬浮固体 含硫量 氧化 

分 类 号：TE39[石油与天然气工程—油气田开发工程]