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X(,124010),,,,,()(),,,;,;;;TE313.8-921000-2643(1999)01-83-87A,,,,,,,,()(),11.1,,,,,,,1.1.1:(1),(2),,,(3)=+++=++++:,5,;,,211Vol.21No.119992JournalofSouthwestPetroleumInstituteFeb1999X199803201997-1998,,1963,,:,;,=+=::25%:(1993)94,:,70%,30%,,(4),,(),,16,,,16::::::::=+==/==+==,=----(5)=(6)::17%,=/(1+):,7%:,3%:12/t8/t:33%(7),1.1.2:,,;:,,,1.21.2.1,,,,,,[1]qi=qoB00+qwXssr=qop(1-Zzsl(1+Cjs+Jy))Tr=qiZsh+qlYqcl+qoQTXssr=Tr,fwl=1Zsh+Yqcl(1-Zzsl(1+Cjs+Jy))-B00Zsh-Yqcl-QT+1481999,,:lgWp=A+BNp:lgLp=A+BNp:LpNp=A+BLp:LpNp=A+BWp::NRC=1Blg(lgeBfwl1-fwl)-A:NRC=1Blg(lgeB11-fwl)-A:NRC=1B1-A(1-fwl):NRC=1B1-(A21)-1-fwlfwl:1.2.2,(),Xssr=qop(1-Zzsl(1+Cjs+Jy))Tr=qsRc+qoQTXssr=qop(1-Zzsl(1+Cjs+Jy))=qsRc+qoQTOSR=qoqsOSRl=Rcap(1-Zzsl(1+Cjs+Jy))-QT[2][3],(1)LgZs=A+BNpNRC=1Blg1BOSRlln10-A(2)ZsN=a+bNpNRC=OSR-1l-a2b,,;1.2.3,,,,,(,;,)(1)Logisticfw=0.98(1+ae-bt),ln(0.98fw-1)=lna-bTfw=fwl,T=1bln(afwl0.98-fwl)(2),OSR=aTbecT,lnOSRa=blnT+CTOSR=OSRL,lnOSRLa=blnT+CTT,(3),:NRC=Tt=x(aebt+ct2)+Np(a0,c0)NRC=Ta+btNRC=a1+be-cTNRC=1a+bcTNRC=a+bcT(a0,b0,0c1)NRC=abcTNRC=ea+b/TNRC=Tt=xa(tne-t)b+Np581:NRC=Tt=xQi1+nQi(t+c)1n+Np,,1.2.4,(1),,,:as=lnNP(1-Zzsl(1+Cjs+Jy)ED)Aob+ln(1s)ER=EDexp(-as)NRC=ERN(2)NRTP(1-Zzsl(1+Cjs+Jy)ED)exp(-as)=Ao(M(1+i)(T2)+TO)sER=EDexp(-as)NRC=ERN2,,,,;,,,(1)11,,3,,5%,(2)2NRc(104t)Wc(%)12561.2912803.231205-2.82NRc(104t)Wc(%)33670.213241-3.5435064.35NRc(104t)Wc(%)1398-0.1414553.931347-3.79NRc(104t)Wc(%)330003213-2.643284-0.486819994,,,,,,,,,Xssr,104;P,/t;qo,104t;,f;Zzsl,f;Cjs,f;Jy,f;Tr,104;ql,104t;qi,104t;Zsh1t,/t;Yqcl1t,/t;QT,/t;fw,f;qw,104t;fwl,f;NRc,104t;qs,104t;Rc1t,/t;OSR,f;OSRl,f;a,f;ED,f;s,well/km2;N,104t;Ao,km2;b,104/well;ER,f;RT,f;M,104/well;O,104/well,a;i,f;T,a,Wc,%;B;,g/cm3;Np,104t;Lp,104t;Wp,104m3;Zs,104t;Qi,104t1.[J].,1995,22(6)2.[J].,1996,23(1):55583.[J].,1997,24(1):6364()1998,1998,211994,()781:NO.1,pp67-70,1999(ISSN1000-2634,INCHI2NESE)Inthispaper,thesignalwaveformreceivedbeforeandaf2tergasenteringthewellborebytransducerplacedbelowtheflowreturnlineintheannulusisanalyzed.Therelationshipbe2tweenthesignalwaveformsuddennessanditswavelettransformisdiscussed.Basedontheanalysisofreceivedsignalwavelettransform,anovelmethodofgasinfluxdetectionisproposed.Thevalidityofthemethodhasbeenverifiedbycomputersimu2lation.KeyWords:wellboreflow;drillingfluid;gasinflux;waveformsuddenness;wavelettransformEFFECTOFDISSOLVEDOXYGENONPOLYMERSTABIL2ITYFuMeilong,ZhouKehou,ZhaoLin(JianghanPetroleumInst)JOURNALOFSOUTHWESTPETROLEUMIN2STITUTE,VOL.21,NO.1,pp71-73,1999(ISSN1000-2634,INCHINESE)ThemechanismofHPAMoxidativedegradationandthechemicalmethodsofretardingsuchoxidativedegradationareanalyzed.TheeffectofdissolvedoxygenonthestabilityofS725polymer,asrelatedtothepolymerfloodingperformanceinHenanoilfield,isstudied.ResultsshowthattheviscosityofS725solutionpreparedwithcleanwaterorproductionwaterdropsrapidlyinthepresenceofoxygenat65.Goodviscositystabilitycanbegainedbycombinationofseveraladditives.KeyWords:degradation;polymer;stability;viscosityAPPROACHTOTHECHARACTERANDMECHANISMOFPOLYELECTROLYTESCOMPLEXESASUSEDINDRILLINGFLUIDSWangShaozhong(OffshoreDevelopmentCompanyofShengliOilfield)HuXingqiJOURNALOFSOUTHWESTPETROLEUMINSTITUTE,VOL.21,NO.1,pp74-78,1999(ISSN1000-2634,INCHINESE)Twocationpolyelectrolyteswererespectivelymixedwithtwoanionpolyelectrolytes,andtheresultantcomplexeswereexaminedontheirabilitytostabilizethewallofwellandinhibitswellingofclay.Analysesweremadeonthecompatibility,saltresistanceandoptimumproportionsofthepolyelectrolytesinthecomplexes,withtheinfluenceofpHtakenintoconsideration.Resultsofthetestsshowthatthecomplexesarehighlysalt-andacid-resistantandaregoodinpropertiesofinhibitingclayexpansionandupholdingthepropertiesofdrillingfluid.Themechanismofclay-swellinhibitionbythecomplexesisdis2cussed.KeyWords:polyelectrolyte;viscosity;clayexpansion;flocculation;mechanismSTUDYONTHECOMPREHENSIVEUTILIZATIONOFNATURALGASPRODUCEDINTUHAOILFIELDDengLan,TangXiaodong,WenFusheng,ZhangBin,YinDaiyi,LiShilun(SouthwestPetroleumInst)JOUR2NALOFSOUTHWESTPETROLEUMINSTITUTE,VOL.21,NO.1,pp72-82,1999(ISSN1000-2634,INCHINESE)InordertomakefulluseofthenaturalgasresourcesinTuhaoilfieldandtoimprovetheoilfieldseconomicperfor2mance,aresearchwascarriedoutontheplansofcomprehensiveutilizationofthedrygas,LPGandlightoilfromtheoilfield,inthelightofthecharacteristicsandthecurrentstatusofutiliza2tionoftheresources.Materialbalancecalculationsandeconomicevaluationsweremadeforeachofthepotentialplans.Accord2ingtotheresultsitissuggestedthattheoilfield,withitsmainactivitiesconcentratingonoilandgasexplorationandexploita2tion,canchoosecertainlow-riskandhigh-profitprojectstoestablishitslocalnaturalgaschemicalindustry,whilesatisfyingtheneedofnaturalgasconsumptionofUrumqiCity.KeyWords:Tuhaoilfield;naturalgas;resources;com2prehensiveutilization;economicevaluationESTIMATIONOFTHEECONOMICALLYRECOVERABLERESERVEOFANOILFIELDLiuBin,GuoFujun(LiaohePetroleumExplorationBu2reau)JOURNALOFSOUTHWESTPETROLEUMIN2STITUTE,VOL.21,NO.1,pp83-87,1999(ISSN1000-2634,INCHINESE)Inthispaper,theauthorsproposedthreemethodsofca