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[](),k200614[],,1978,(),3122232(1.()434023;2.100083;3.,726202)1,;,,PVT,,,;,,,,,1965Al2HussainyRamey[1]Agarwal[2](1979)Meunier,KabirWittman(1978)[3](NormalizedPressure)(Nor2malizedTime),,,45,,4590;,,,,,,,,,,,,(p)=ppo2pZdp=ni=1122pZi+2pZi-1(pi-pi-1)(1),,,,Hall2Yarbough(1974),Z=1+y+y2-y3(1-y)3-(14.76t-9.76t2+4.58t3)y+(90.7t-242.2t2+42.4t3)y(1.18+2.82t)(2)Z=0.06125pprtyexp-1.2(1-t)2(3)F(y)=-0.06125pprtexp[-1.2(1-t)2]+y+y2+y3-y4(1-y)3-(14.76t-9.76t2+4.58t3)y220074162+(90.7t-242.2t2+42.4t3)y(2.18+2.82t)=0(4):t(t=1PTpr);y(ypr)Lee2Gonzalez2Eakin(1966),g=10-4Kexp(XYg)(5)K=(0.4+0.02Mg)(1.8T)1.5209+19Mg+1.8TX=3.5+9861.8T+0.01MgY=2.4-0.2X:g,mPas;T,K;Mg,kgPkmol;g,gPcm3,,,,,p=CgiCgipi(6):p,MPa;Cg,mPas,MPa-1;pi,MPa;iCgi,mPas,MPa-1(6),12,,,,t,p,,tp,,p:pnew=t0polddtt(7)pold=pws(t)-pws(t=0):t,h;pold,MPa(6)(7)3434,,45,,,,(16)31162:59221582201.,,2.,,,,,3.,,,,,4.,,,,,1,..,2003.42,..(),1996,42:3493553..,2005,114,..(),2000,5,,..,2005.14(3):2006-10-20:(13),,,1Al2HussainyR,RameyHJJrandCrawfordPB.TheFlowofRealGasesThroughPorousMedia.J.Pet.Tech(May1966),624-636,Trans.AIME:2372AgarwalRG.RealGasPseudotime-ANewFunctionforPressureBuildupAnalysisofGasWells.SPE82793MeunierD,KabirCSandWittmannMJ.GasWellTestAnalysisUseofNormalizedPressureandTimeFunctions.SPEFormationEvaluation,(Dec.1987):629-6364.[M].,20035,.[M].:,1994:2006-11-15:6120074WELLTESTING(YOUQIJINGCESHI)Vol.16No.2(SerialNo.100)2007AbstractsResearchofTheory&MethodStudyonDeterminationoftheRadius2of2Investigation.2007,16(2):13QiLiwei,WangXiaodong(PowerSourceDepartment,ChinaGeo2ScienceUniversity(Beijing)Ageneralformulaofdrawdownradius2of2Investigationincludingtypicallinearflow,radialflowandsphericalflowispresentedfirstlybasedonthesolutiontotheproblemofgeneralradialflowswithatransientpointsink.Secondly,animprovedformulaofdrawdownradius2of2Investigationforanon2Newtonianpower2lowfluidisobtainedintermsofthenewsolutiontothemodelofthefluidpseudo2steadystateflow.Atlast,Peacemansbuildupradius2of2Investigationformulaisintroduced.Keywords:radiusofinvestigation,welltestanalysis,non2newtonianpowerlowfluid,drawdown,buildupANewMethodforCalculatingNaturalGasCompressibilityFactors.2007,16(2):47LiuYuewu,WuXuesong,ChenWeiliang(DivisionofEngineeringScience,InstituteofMechanics,ChineseAcademyofScienc2es),GaoLeiyan(OffshoreOilDevelopmentCompany,LiaoheOilfield)Thegascompressibilityfactorscalculatingmethodsincommonuseareclassifiedandevaluated,andtheiradvantagesanddisadvantagesaredescribedinthispaper.Basedonthecomparisonandanalysis,anewmethodforcalculatingnaturalgascompressibilityfactorshasbeendevelopedwithitsfundamentalidea,calculatingmethodandresults.Bycomparingwithotherresultsinthreedifferentmanners,theresultsshowthattheerrorsbetweenthenewmethoddevelopedinthisstudyandStanding2Katztypecurveapproximatedtozero,andthemaximalrelativeerrorsbetweenthenewmethodDAKmethod,whichisthemostaccuracymethodforcalculatingZ2fac2torbyusingEOS,islessthan1%.Theadvantagesofthemethodarethatthecomputationspeedisquick,theprecisionishigh,therangeofapplicationislarge.Keywords:naturegas,gasdeviationfactors,calculatingmethod,evaluationandanalysisUnsteadyWellTestingforCBM(CoalBedMethane).2007,16(2):811LiangZhijun(SINO2AustraliaCombinationMiningTechnicalDevelopmnet,Co.,Ltd.),LiaoXinwei(ChinaPetroleumUni2versity),LiXiang(NingxiaProvinceBaijigouMiningFactory,ShenhuaCoalCo.,Ltd),ShaoLongyi(ChinaMiningUniver2sity)Theory,methodandapplicationofinjectionPdownpressuretestinganalysisforCBMisstudiedandsomeofformationparametersofpermeability,reservoirpressure,skinfactorandclosurepressurehavebeengained.Foranalyzingthesecomprehensivelyobtainedgeo2logicdata,itisjudgedthatthesevaluesarecorrespondstoactualsituationbasicallyandthesedataareusedforlaterperiodofproduc2tionwellsdesignandplanofwellnetwhichincreasesproductivityandincomeandgainsagoodeconomicaleffect.Keywords:CBM,welltesting,applicationTheProcessingMethodstotheDeepGasWellTestingData.2007,16(2):1213ZouCunyou(KeyLaboratoryofExplorationTechnologiesforOilandGasResources(YangzeUniversity),MinistryofEduca2tion),LiZhiping,WangShuping,HuangZhiwen,XuJinjin(ChinaUniversityofGeosciences),LiYanping(ExplorationandExploitationAcademy,QinghaiOilfield)Totheproblemsoftheslopeoftheearlyperiodonlog2logplotismorethan1andthedataofthemiddleperiodandlateperiodistoodiscretewhichmakestheearlyperiodoftheoreticalcurvecannotbematchedandtoodiscretemiddleandlaterdatamakestoodifficultforinterpreterstomakeacuteanalysis.Inthepaper,themethodthatusingtestedpressure,temperaturetocalculatePVTparametersandusingviscosityandcompressibilitytocorrecttherealpressurepointisstudiedandintegraltransformationtodealwithderivativedataisputoutwhichcanmakethederivativeplotmoresmoothly.Theapplicationsaboutthetwomethodsprovethattheycanmakegoodeffectsfortheinterpretationfordeepwell.Keywords:deep2gaswell,slopeoftheearlyperiod,discrete,theoreticalcurve,pressurecorrected,integraltransformationWellTestingModelSelectionandReservoirAnnotationtoLowPermeabilityReservoirs.2007,16(2):1416YangXiuxiang,ChengShiqing,YuanYujin,YangTianlong(KeyLaboratoryofPetroleu