CAJ | 학술논문

胜利油田注水井腐蚀严重,结合注水水质,分析了腐蚀严重原因:注水井的腐蚀主要是回注污水中Cl-含量高、细菌滋生严重、含较高的HCO-3及硫化物造成,且随着注水井温度的升高,腐蚀因素在不断变化.主要分析了东辛采油厂污水中高矿化度、高游离CO2对注水井造成的腐蚀;在现河采油厂注水井油套环空腐蚀主要是由于细菌滋生、繁殖造成的腐蚀.结合注水井实际现状,实施相对应的防护措施:在注水井管柱上应用渗氮油管,延长了管线使用寿命;在回注污水过程中有选择性地投加缓蚀剂、杀菌剂;在油套环空中实施环空保护技术,实施后取得较好的效果,对延长注水井有效寿命具有重要意义.
성리유전주수정부식엄중,결합주수수질,분석료부식엄중원인:주수정적부식주요시회주오수중Cl-함량고、세균자생엄중、함교고적HCO-3급류화물조성,차수착주수정온도적승고,부식인소재불단변화.주요분석료동신채유엄오수중고광화도、고유리CO2대주수정조성적부식;재현하채유엄주수정유투배공부식주요시유우세균자생、번식조성적부식.결합주수정실제현상,실시상대응적방호조시:재주수정관주상응용삼담유관,연장료관선사용수명;재회주오수과정중유선택성지투가완식제、살균제;재유투배공중실시배공보호기술,실시후취득교호적효과,대연장주수정유효수명구유중요의의.
Injection wells are corroded severely in Shengli oilfield, combined with injected water quality, the reasons of corrosion are following, high concentration of CI-, HCO-3 and sulfide, and severe bacteria growth. Besides, corrosion factors continuously diverse with the increase of well temperature. High mineral salt concentration and free CO2 are the major reasons in Dongxin oil field, and growth and reproduce of bacteria is the reason for casing annular corrosion in Xianhe oil field. On the basis of the present situation of injection wells, prevent measures were earried out, consist of using nitrided tubing, selecting corrosion inhibiter and bactericide, and annulus protection technology. Good results were achieved in practice, which have important meaning for extension life injection well.