陆梁油田抽油井井下防腐防垢技术

20102911油气储运Oil&GasStorageandTransportation(1.;2.;3.)..,2010,29(11):841844,847.:通过对陆梁油田各油井井下生产管柱的腐蚀结垢现状进行调查,研究了抽油井井下管柱腐蚀结垢的影响因素和室内防腐防垢药剂配方,从防腐防垢技术体系中优选出适合陆梁油田的药剂体系,编制了现场试验方案通过现场试验优化建立了防腐防垢技术方案,确立了以HEDP阻垢剂和KL-601改进型缓蚀剂为主剂的防腐防垢体系,并用示踪剂示踪的方法对单井防腐防垢效果进行动态跟踪评价,优化了防护周期现场试验和工业应用结果表明:陆梁油田现场应用井下防腐防垢工艺可以满足生产需要,而且大大延长了易腐蚀结垢井的平均检泵周期:陆梁油田;抽油井;采出水;腐蚀;结垢;阻垢剂;缓蚀剂;示踪剂0引言,1000~2500m,30%,,,Cl-HCO3-,CO2H2S,[1],,1水质分析CO2H2SCl-HCO3-,,4,,,,pH,Ca2+Mg2+SO42-(1)1pHHCO3-/(mgL-1)Cl-/(mgL-1)SO42-/(mgL-1)Ca2+/(mgL-1)Mg2+/(mgL-1)/(mgL-1)J2t7.45320.4315774.34157.801393.4564.7626291.24J2x47.911878.186549.454.2969.0419.6613363.45K1h17.23715.115472.7741.40197.1936.8710007.34K1h27.82983.224868.306.53193.9124.919339.464,:NaHCO336.22%CaCl253.1%,Na2SO43.97%MgCl26.69%,HCO3-Cl-SO42-Ca2+Mg2+Na+,H2S10mg/kg10.5%2腐蚀结垢的影响因素分析:,,1963,2001,:09906869177Email:[e-mail]84120102911韩力等:HanLi,etal:AnticorrosiveandScalePreventionTechniqueforPumpingWellinLuliangOilfield~8(87%),,Ca2+Mg2+,Cl-1000~20000mg/L,4000mg/L90%Cl-,Cl-,SO42-HCO3-,SO42-Cl-,HCO3-,CO2H2S,,Ca2+Mg2+;CO2H2SO2,,Cl-,3:pH2.1,CO2,[24]60,CO2FeSO4,60~110,,,;60,FeCO3,(Mn40,Cr60),1400m,60,40~50,2.2pHpH,,pH(CaCO3)pH45,CaCO35,pH56,CaCO3pH,,pHpH7~8,2.3,Cl-SO42-HCO3-Fe2+Ca2+Mg2+Ca2+Mg2+HCO3-SO42-(),,Cl-,Cl-,,Cl-,3防腐防垢剂的优选,,,,,,3.1[56]:()()(),(),:KL-601,130mg/L,0.11mm/a,65%(1)3.2,,():100mg/L,65%,(2)3.3,,,84220102911油气储运Oil&GasStorageandTransportation[78],,CaCO3MgCO3,MgCO3CaCO36,CaCO3,CaCO3,(HEDP),Ca2+Fe2+Cu2+Zn2+,,(HEDP),Ca2+(2),12/(mgL-1)/h/g/(mma-1)%%O50704100100200200484848480.01290.01280.01610.00300.25640.25450.32010.059655.3655.7144.2989.6255.5466.96KL-601100100200200484848480.01230.00830.00780.00590.24450.16500.15510.117357.4471.2873.0179.5864.3676.302HEDP(Ca2+)HEDP(2),HEDP,,,,,,HEDP,HEDP,3.4,(3),80,8h,5mg/L,,HEDP,84320102911韩力等:HanLi,etal:AnticorrosiveandScalePreventionTechniqueforPumpingWellinLuliangOilfield(,4)4(!)/mm(20)/(gh-1cm-2)/(gm-3)%2)(200mgL-1)%40!3001)∀10#1.10#80#801),,2007,40mm;2)200mg/L4现场试验4.1,,,,,∃%,,,,:Cd=wc/wd:Cd;wc(Fe3++Fe2+),%;wd(Ca2++Mg2+),%:Cd#5,;2∀Cd5,,;0.5∀Cd2,;0.2Cd0.5,,;Cd∀0.2,:,,,,4.2,4.2.1防腐防垢用示踪剂的研究,,,,:,,;1.0~1.5mg/L,,4.2.2固防剂用量的确定5%,,,,,90kg/a(下转第847页)84420102911油气储运Oil&GasStorageandTransportation(),,,,Fe5.34mg/kg,[3]Fe0.3mg/L,Fe,,3.2X,,FeCr2O4NiOSiCE1203,Fe,CO,AlSiKCaSCuN,Fe,OCX,,OCFe,,,E1203-:,,4防腐建议,:(1),,18-8,(2),(3),:[1],,.F-T[J].,1993,16(1):111.[2].[M].:,2004:17.[3],,,.GB/T19923-2005[S].:,2005.(:20100504)(上接第844页)5结论(1),H2S,,(2),,(3),,(4),,,:[1].[D].:,2006.[2],,.CO2/H2S[J].,2003,17(6):1315.[3],,,.H2SCO2/H2S[J].,2004,16(6):395397.[4],,,.CO2/H2S[J].,2003,24(3):277281.[5],,.[J].,2003,36(8):13.[6].[J].,2001,10(2):3132.[7],,,.[J].,2008,23(1):7479.[8],,,.[J].,2007(4):3841.(:20100224)847