郑408火烧驱油注气井油套管腐蚀安全评估与防护

20520089CORROSIONSCIENCEANDPROTECTIONTECHNOLOGYVol.20No.5Sep.2008:2007203231;2007206220:(1979-),,,,.Tel:[phone]E-mail:[e-mail]4081,2,1,1,111,257000;21,257000:408X(XRD)(SEM)(EPMA/EDS).:;...:;;;;:TG17216:A:100226495(2008)0520386202SAFETYASSESSMENTANDCORROSIONPROTECTIONFORZHENG2408OILDISPLACEMENTWELLBYIN2SITUCOMBUSTIONLONGYuan2yuan1,ZHANGChun2mao2,WANGSui2ping1,JIJie1,YANGWei2gang111ResearchInstituteforCorrosionandProtection,TechnologyandDetectionCenterofShengliOilField,Dongying257000;21SafetyandEnvironmentalProtectionResearchCenter,TechnologyandDetectionCenterofShengliOilField,Dongying257000Abstract:CorrosionproductsofthetubingsforZheng2480oildisplacementwellwereexaminedbymeansofX2raydiffractionanalysis(XRD)andelectronprobemicroscopeanalysis(SEM)(EPMA/EDS).Ac2cordingtotheexaminationresultscombinedwithpracticalproductionandoperationconditions,thepre2liminaryconclusionis:thatthetubingupperpartmainlysufferedfromoxidationcorrosionandthelowerpartsufferedfromcorrosionperforationcausedbyacceleratedacidcorrosionbeneathsediments.Thereex2istsrisksfortubingandcasingundercurrentproductionconditions.Appropriateinternalprotectivetech2nologyisproposedasaneffectivemeasureforcorrosionprotection.Keywords:oildisplacementbyin2situcombustion;gasinjectionwell;causeofcorrosion;assessmentforcorrosionsafety;protectionmeaeare[1].408,20039,,1915MPa2518MPa,,,(210,,31)25125m3,;200512,2118MPa,1618MPa,,20067,210,;,100m,350m,450m,,.,,,.1D/MAX-3BX.JXA8800R,.2211XRD1.Fe2O3,Fe2O3.Fig.1X2rayspectrumofcorrosionproduct5:408387(SEM)(EPMA/EDS)23.,,(2A),(3a);(2B),(3b).212O2XRD,Fe2O3.,(1mg/L),[2].016mg/L,;,,,,.213(283K,333g/100gH2O).:ZnCl2+H2O=Zn(OH)Cl+HCl.:ZnCl2+H2O=H[ZnCl2(OH)],.,,6mol/LpH014.,(210,,31)25125m3,,5060,,,.,,,;,,.214,,,,.,,,;Fe2+,,,,Cl-:Fe2++2Cl-+2H2OvFe(OH)2y+2H+Cl-,,,.215,408;,.3,,,,,,,..,408,.:[1],,.[J].,2005,12(5):101.[2].[J].,2006,23(6):1.