ASTM E1675-2004e1 化学分析用两相地热流体取样的标准实施规程

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【英文标准名称】:StandardPracticeforSamplingTwo-PhaseGeothermalFluidforPurposesofChemicalAnalysis
【原文标准名称】:化学分析用两相地热流体取样的标准实施规程
【标准号】:ASTME1675-2004e1
【标准状态】:现行
【国别】:
【发布日期】:2004
【实施或试行日期】:
【发布单位】:美国材料与试验协会(US-ASTM)
【起草单位】:E44.15
【标准类型】:(Practice)
【标准水平】:()
【中文主题词】:蒸汽;取样;实施规程
【英文主题词】:chemicalanalysis;fluidchemistry;geothermalresources;two-phasegeothermalfluids
【摘要】:Theobjectiveofthispracticeistoobtainrepresentativesamplesofthesteamandliquidphasesastheyexistinthepipelineatthesamplepoint,withoutallowingsteamcondensationoradditionalliquidflashingintheseparator.Asignificantfeatureofthepracticeistheuseofacyclone-typeseparatorforhigh-efficiencyphaseseparationwhichisoperatedatflowrateshighenoughtopreventsignificantheatlosswhilemaintaininganinternalpressureessentiallythesameasthepipelinepressure.Anothersignificantfeatureofthepracticeistolocatethesamplingseparatoratapointonthepipelinewherethetwo-phaseflowisatleastpartiallystratifiedtoaidintheseparationprocess.Itisneithernecessarynorpossibletopassrepresentativeproportionsofeachphasethroughthesamplingseparatortoobtainrepresentativesamples.Theseparatorisusuallyattachedtoanappropriatelyorientedporttocollecteachspecificphasex2014;normallyontopofthelineforsteamandatthebottomforliquid.Insomecases,pipingconfigurationscangenerateunusualflowregimeswherethereverseisrequired.Iftheratioofonephasetoanotherisnotextreme,representativesamplesofeachphasecanoftenbeobtainedfromahorizontalportonthesideofthepipeline.Thispracticeisusedwheneverliquidorsteamsamples,orboth,mustbecollectedfromatwo-phasedischargeforchemicalanalysis.Thistypicallyincludesinitialwell-testingoperationswhenawellisdischargedtotheatmosphereorroutinewellproductionwhenawelldischargestoafluidgatheringsystemandpowerplant.Thecombinedtwo-phaseflowofseveralwellsproducingthroughacommongatheringsystemmayalsobesampledinaccordancewiththispractice.Thispracticeisnottypicallyemployedwhenindividualwellsproducetodedicatedproductionseparators.Inthesecases,theseparatedsteamandliquidattheoutletoftheproductionseparatorissampledinaccordancewithsingle-phasesamplingmethods(SpecificationE947).1.1Thepurposeofthispracticeistoobtainrepresentativesamplesofliquidandsteamastheyexistinapipelinetransportingtwo-phasegeothermalfluids.1.1.1Theliquidandsteamsamplesarecollectedandproperlypreservedforsubsequentchemicalanalysisinthefieldoranoff-siteanalyticallaboratory.1.1.2Thechemicalcompositiondatageneratedfromtheanalysisofliquidandsteamsamplesmaybeusedformanyapplicationsimportanttogeothermalenergyexploration,development,andthelong-termmanagedexploitationofgeothermalresources.Theseapplicationsinclude,butarenotlimitedto,resourceevaluationssuchasdeterminingreservoirtemperatureandtheoriginofreservoirfluids,compatibilityofproducedfluidswithproduction,powergenerationandreinjectionhardwareexposedtothefluids(corrosivityandscaledepositionpotential),long-termreservoirmonitoringduringfieldexploitation,andenvironmentalimpactevaluationsincludingemissionstesting.1.1.2.1Tofullyutilizethechemicalcompositiondataintheapplicationsstatedin1.1.2,specificphysicaldatarelatedtothetwo-phasedischarge,wellbore,andgeothermalreservoirmayberequired.Mathematicalreconstructionofthefluidchemistry(liquidandsteam)toreservoirconditionsisaprimaryrequirementinmanyapplications.Ataminimum,thisrequirespreciseknowledgeofthetotalfluidenthalpyandpressureortemperatureatthesamplepoint.Fluidreconstructionandcomputationstoconditionsdifferentfromthesamplecollectionpointarebeyondthescopeofthispractice.1.2Thispracticeislimitedtothecollectionofsamplesfromtwo-phaseflowstreamsatpressuresgreaterthan70kPagauge(10psig)andhavingavolumetricvaporfractionofatleast20%.......
【中国标准分类号】:E30
【国际标准分类号】:75_020
【页数】:9P.;A4
【正文语种】: