连续油管在酸性环境下的腐蚀与防护及其研究进展

:(:201003050702):,1980,,;:(610017)25:[phone]Email:[e-mail]鲜宁1,2姜放1,2荣明2施岱艳1,2卢秀德3吴知谦1,21.2.3..连续油管在酸性环境下的腐蚀与防护及其研究进展.天然气工业,2011,31(4):113116.连续油管井下作业优点突出,但在酸性环境使用过程中其使用寿命显著下降为此,根据连续油管的失效统计和试验研究进展,介绍了连续油管在酸性环境下的腐蚀问题和防护措施:硫化物应力开裂和氢致开裂造成的损伤不可消除,存在累积效应;在酸性环境下,经过周期性的弯曲塑性变形和湿H2S腐蚀介质的共同作用,导致连续油管性能退化,其使用寿命明显降低;较之非酸性环境还新增一种失效形式H2S引起的脆性开裂;采用添加合适的缓蚀剂和脱硫剂,可以提高碳钢连续油管在酸性环境下的使用寿命此外,镍基合金(625)连续油管在酸性环境下具有良好的耐蚀性能该研究成果对川渝地区在酸性气田井下作业应用具有重要的参考价值连续油管失效腐蚀硫化物应力开裂硫化氢脆性开裂缓蚀剂脱硫剂DOI:10.3787/j.issn.10000976.2011.04.0262060,,,[12],,,20a[1]StanleyVanAdrichemCrabtree[18],,,:,,,H2S,,,1,,,StanleyVanAdrichemCrabtree[110],:;;;;;;,(SSC)1998,Stanley[7]51%19952001,VanAdrichem[3,8]126,8,,6a,35%~50%Crabtree[12]19972007:33%,8%H2S,2%,15%,29%,9%,2%,1%,Larsen[6]113314:,,,,H2S,H2SCrabtree[2,10]:,75%,70%50%,,2,,,,,,H2S,,H2S,H2S,,H2S,,H2S(HESSCHIC),,,H2S,,,H2S,H2S,2H2S1:1.5(38.1mm)90,,,10,8,5H2S,H2S,H2S,H2S,SSCH2S0.04MPa,pH,pH,SSC,SSC,11[10]2:1.5(38.1mm)80,,,SSCH2S4,,,2,,H2SH2S:H2S211420114,,,,H2S,,,;H2S,3,,6,,,6[11],,,,,,,,,,,,JIP,,(ShellCanada)BJ(BJServices),(IRP),(DCB)(SSRT)(NACEProofRing)(BB)(LCCF)LuftSmugaOtto[5,12][5,10],8070SSC:,H2S,,,H2S,H2SLuft[12]625:625H2S,McCoy[1314],QT900QT10000.1MPaH2SSSC:QT900QT10000.1MPaH2SSSC,,0.2%CG,QT900QT1000SSC,Luft[12]80,:,2/34,,,,,,,4NasrEiDin[4],:1):80kpsi(1psi=6.895kPa,),75kpsi,70kpsi,25%(),20HRc;:S0.002%(,),P0.025%,C0.6%;:,,2),3)70kpsi80kpsi,70kpsi,H2S4)5)6)7),1153148)9),10),5,,,;,,H2S,,NasrEiDin[1]CRABTREEAR,GAVINW.Coiledtubinginsourenvironmentstheoryandpractice[C]paper89614presentedattheSPE/ICoTACoiledTubingConferenceandExhibition,2324March2004,Houston,Texas,USA.NewYork:SPE,2004.[2]CRABTREEAR.CTFailuremonitoring:adecadeofexperience[C]paper113676presentedattheSPE/ICoTAcoiledtubingandwellinterventionconferenceandexhibition,12April2008,TheWoodlands,Texas,USA.NewYork:SPE,2008.[3]VANADRICHEMWP.Coiledtubingfailurestatisticsusedtodeveloptubingperformanceindicators[C]paper54478presentedattheSPE/ICoTACoiledTubingRoundtable,2526May1999,Houston,Texas,USA.NewYork:SPE,1999.[4]NASREIDINHA.Workoversinsourenvironments:howdoweavoidcoiledtubingfailures[C]paper87622presentedatthe1stInternationalSymposiumOilfieldCorrosion,28May2004,Aberdeen,UnitedKingdom.NewYork:SPE,2004.[5]SMUGAOTTOIWONA,NOWINKAJ,GRAHAMW,etal.Coiledtubingperformanceevaluationforsourserviceundervariableloadingconditions[C]paper01080presentedattheNACECorrosion2001,1116March2001,Houston,Texas,USA.Houston:NACE,2001.[6]LARSENHA,REICHERTBA.Coiledtubingabrasionanexperimentalstudyoffieldfailures[C]paper81724presentedattheSPE/ICoTACoiledTubingConference,89April2003,USA.NewYork:SPE,2003.[7]STANLEYRK.Ananalysisoffailureincoiledtubing[C].paper39352presentedattheIADC/SPEDrillingConference,Dallas,TX,36March1998,Dallas,Texas,USA.NewYork:IADC/SPE,1998.[8]VANADRICHEMWP,LARSENHA.CoiledtubingfailurestatisticsusedtodevelopCTperformanceindicators[J].SPEDrilling&Completion,2002,17(3):159163.[9]HAMPSONR,MOIRC,FREENEYT.WorkingwithcoiledtubinginH2SandCO2wells:aglobalperspective[C]paper121294presentedattheSPE/ICoTACoiledTubingandWellInterventionConferenceandExhibition,31March1April2009,TheWoodlands,Texas,USA.NewYork:SPE,2009.[10]CRABTREEAR,SKRZYPEKH.Investigationofcoiledtubingfailuresover2yearsandcorrosionpreventionmethods[C]paper46024presentedattheSPE/ICoTACoiledTubingRoundtable,1516April1998,Houston,Texas,USA.NewYork:SPE,1998.[11],.[J].,2007,29(3):115117.[12]LUFTHB.Thelowcyclefatigueandplasticstrainresponseofcoiledtubinginasourenvironmentwithoutcorrosioninhibitorprotection[C]paper81723presentedattheSPE/ICoTACoiledTubingConference,89April2003,Houston,Texas,USA.NewYork:SPE,2003.[13]MCCOYT.SSCresistanceofQT900coiledtubing[C]paper93786presentedattheSPE/ICoTACoiledTubingConferenceandExhibition,1213April2005,TheWoodlands,Texas,USA.NewYork:SPE,2005.[14]MCCOYT,THOMASJ.SSCresistanceofQT900andQT1000coiledtubing[C]paper99557presentedattheSPE/ICoTACoiledTubingandWellInterventionConferenceandExhibition,45April2006,TheWoodlands,Texas,USA.NewYork:SPE,2006.(20110228)11620114ticsandtheinfluencingfactorsofsafetyrheologicalchangesinawellblowoutaccidentaredescribed.Onbasisofthis,aphysicalandamathematicSafetyRheologyMutationModelsarebuiltandadoptedtoanalyzethewholerheologyandmutationprocessofawellblowout.Asaresult,awellblowoutisdividedinto3stagesbythespeedofdamageandloss:decelerating,constant,andaccelerating,andisalsoparticularlysummarizedas6detailedsteps:hiddenoverflow,overflow,kick,blowout,aftereffect,andtransition,completelydisclosingtheessenceofhowawellblowoutoccurfromtheverybeginningtotheend.Theresearchresultsshowthatthekeytocontrollingablowoutaccidentliesintherheologicalstage,andatmostnottoexceedthemutationvigilancepoint(thepointbetweenwellkickandwellblowout),sosafetymanagementshouldbestrengthenedandsafetytechnologiesbeappliedtoextendthesafetyrheologicalstageandtopreventtheoccurrenceofmutationaswell.Keywords:blowout,RheologyMutationtheory,model,formationfluids,safety,damage,accidentDOI:10.3787/j.issn.10000976.2011.04.025HeSha,professor,bornin1959,graduatedindrillingengineeringfromSou