靖邊氣田氣井管柱腐蝕機理及防護對策研究.pdf

1、西安石油大學碩士學位論文靖邊氣田氣井管柱腐蝕機理及防護對策研究姓名：田建峰申請學位級別：碩士專業(yè)：石油與天然氣工程指導教師：李天太王興龍20081008英文摘要Subject：StudyoncorrosionmechanismandprotectsolutionofwellstringinJingbianGasfieldgbianGasfiledwellscauseddownholestringcorroded，additionalby

2、partofwellshavehighsalinityformationwaterThesurveyshowsthatsynergeticeffectofhighsalinitywaterandC02isthemainreasonoftubingcorrosionandperforationCorrosionratetestandsnubbingwellborecorrosiontesthavebeendoneforsomegaswel

3、ls’downholestringandaftertypicalwells。stringhavebeentested，ithasfoundthatdownholestringcorrosionpre—protestforhighsalinitywellsiskeytaskCorrosionrulesindifferentconditionwasshownbyXdiffractionoftubingsurfaceH2Sstresscorr

4、osionoftubingnearwellheadismainlyexistedinlowwaterproductionandhighH2Swells；stresscorrosionrupturesurfaceshowscrystalspread；C02corrosionismainlyexistedinmiddlepartofwellboreofhighwaterproductionwellsandaccompaniedbyafewH

5、2ScorrosionpiaingcorrosionoftubinganddegreeisincreasedwithwaterproductionandsalinitychloridewillaccelerateC02corrosionThepaperstudyandanalysisthetubingcorrosionsituationanddegreebasedonrealgasstringsurveyandinterpretatio

6、nbysnubbingwellloggingOnthebasis，theexperimentisdesignedtostimulategaswellcorrosionenvironmentandstudycorrosionmechanismandrulesTheratioofPc觀／PmSimpactsthecorrosiontype，theratioofPc02fPH2sinJingbiangasfieldishigh，C02isma

7、inreasonofgaswellcorrosionandhighcontentofCa十inwateracceleratethepartcorrosionOutsidesurfaceoftubingcorrosiondegreeishigherthaninnersurfaceInordertofindaprotectionsolutionofgaswellcorrosioninJingbiangasfiled，anticorrosio

8、nresearchisstartingfocusongaswellscorrosionofhighsalinitySelectpipeandtubingwhichadapttohighsalinityandPc02／PH2sratioenvironment，anti。corrosiveagentoptimizationstudyandcoatingprotecttesthavebeencarriedout，someresulthaveb