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30420068JOURNALOFDAQINGPETROLEUMINSTITUTEVol.30No.4Aug.2006:20060316;:;::(1964-),,,.1,1,2,3,4(1.,163318;2.,163517;3.,163511;4.,841000):,,.,,;,,,.:;;;;:TE357.431:A:10001891(2006)04001604(),[1,2],[3-5].2,,;,.,,,.,,,.,,.1,.,,.pf=pP+(S-pP)+St,(1):pf;pP;S;St;.22.1,,ps,,pr.St,St=pf-pr.(2)612.2,;..,,,.(1)pf1=pP1+1(S1-pP1)+St1,pf2=pP2+2(S2-pP2)+St2.(3)(3)pf1-pP1-St1pf2-pP2-St2=S1-pP1S2-pP2.(4)H,:=alnH+b,(5):a,b.(5)HS=H0dH=H0(alnH+b)dH=aHlnH-aH+bH,(6)(6)Skg/m2,MPaS=0.0098(aHlnH-aH+bH).(7)2H1,H2,S1=0.0098(aH1lnH1-aH1+bH1),(8)S2=0.0098(aH2lnH2-aH2+bH2),(9)pf1-pP1-St1pf2-pP2-St2=0.0098(aH1lnH1-aH1+bH1)-pP10.0098(aH2lnH2-aH2+bH2)-pP2,(10)a+BAb=CA,(11):A=0.0098(pf1-pP1-St1)(H2lnH2-H2)-0.0098(pf2-pP2-St2)(H1lnH2-H1);B=0.0098H2(pf1-pP1-St1)-0.0098H1(pf2-pP2-St2);C=pP2(pf1-pP1-St1)+pP1(pf2-pP2-St2).a,b.(7).2.3,,,(1).2.4,,,.33.1pf,,pf,.pf=pB+pj-pm-pU,(12):pB;pj;pm;pU714:.pj,pm,pU.3.2pf(1),(11),a,b,S=0.0098(0.1727HlnH-0.1727H+1.0813H).(13)pP,2.1H/mpf/MPa1P2968.519.842P5984.519.883P7995.621.074P11066.522.015P41021.321.676P91046.622.037P61049.221.118P91002.720.319P101107.823.5810P21064.322.8411P41073.222.3612P4971.221.222H/mS/MPapP/MPa1P2968.519.896.472P5984.520.256.523P7995.620.509.174P11066.522.088.445P41021.321.076.916P91046.621.646.927P61049.221.695.438P91002.720.655.419P101107.823.018.9510P21064.322.038.9511P41073.222.238.9712P4971.219.9510.183.33St/MPaSt/MPa/%1P113.132.955.752P52.752.853.643P73.053.204.924P32.782.702.88,44,St,St.3.3,44.23%,,.,(1),4.3.4pf,pf=0.00980.23H.(14)(14)pf,5.5,1.71MPa,0.35MPa,.4St/MPaP12.710.7624P22.690.8217P32.780.7872P42.960.8114P52.750.8158P62.850.7630P73.050.8019P82.930.7655P93.070.7937P103.010.8088P113.130.78965MPapfpfpf1P219.8421.831.9920.190.352P519.8822.192.3120.470.593P721.0722.441.3720.77-0.304P122.0124.042.0321.55-0.465P421.6723.021.3521.36-0.316P922.0323.591.5621.67-0.367P621.1123.652.5420.69-0.428P920.3122.602.2920.580.279P1023.5824.971.3923.33-0.2510P222.8423.991.1522.39-0.4511P422.3624.191.8322.690.3312P421.2221.890.6721.07-0.151.710.35(21)81302006.3,,.1.5g/L,,.,1.22,1.5g/L.2(1.5g/L)3(1.22).,45,,60.,;,,.3(1).(2),,,.,1.22,1.5g/L.:[1],,,.--[J].,1994,18(4):31-33.[2],,,.[J].,2005,29(6):95-97.[3]MANSUURSA.[J].,.,1998(3):10-11.[4],,.[J].,1996,23(6):58-61.[5]HAWKINGBF,TAYLORKC.DavidLloydminsterWainwrightSparky[J].,.,1995,18(2):60-79.(18)4(1).,.(2),..:[1],,.[J].,2005,29(2):40-42.[2].[J].,2004,25(1):104-107.[3],,,.[J].,2004,28(4):42-44.[4],.[J].,2002,14(4):67-70.[5],.[M].:,2004.124:electrofiltrationpotentialamplitudeinthecorewithgoodpermeabilityisbigger,andthatinthecorewithpoorpermeabilityissmallerrelatively.Thecorewiththepoorestpermeabilitycanhardlypossesselectrofiltrationpotentialwithincertainrangeofpressure.Keywords:electrofiltrationpotential;spontaneouspotential;experiment;pressure;permeabilityPredictionofdrillstring’sfatiguelifeundertorsionandaxialvibration/2006,30(4):9-11AIChi1,GEWei2tao1,WANGLi2ming2(1.KeyLaboratoryofEducationMinistryforEnhancedOilRecovery,DaqingPetroleumInstitute,Daqing,Heilongjiang163318,China;2.ServiceCompanyofDrillingTechnology,DaqingPetrole2umAdministrationBureau,Daqing,Heilongjiang163358,China)Abstract:Calculationmethodsofdrillstring’sfatiguelifecannotexplaintheinteractionoftorsionandaxialvibrationnow,becausemostofthemarebasedonthetheoryofsinglecrack.Inthepaper,Basedonthetheoryofcompoundcrackandfracturemechanicsandsurfacelinercracksofdrillstringoftenoc2curringinprocessofproductionandapplication,afatiguelifemodelofdrillstringundertheinteractionoftorsionandaxialvibrationisestablished.Fieldapplicationshowedthatthecalculationmethodofthemodelissimple,andeasytoapplyinengineering.KeyWords:drillstring;compoundvibration;mechanicsanalysis;fatiguelifeOptimizationmethodforlayeredwaterinjectionprojectbasedonthedistributionofremainingoil/2006,30(4):12-15WUJia2wen1,WANGJia2chun2,LIUJian2,SONGKao2ping1,YINJian2(1.PetroleumEngineeringCollege,DaqingPetroleumInstitute,Daqing,Heilongjiang163318,China;2.OilRecoveryPlantNo.2,DaqingOilfieldCorp.Ltd.,Daqing,Heilongjiang163414,China)Abstract:Optimizingmethodoflayeredwaterinjectionprojectwasstudiedbasedonthelawsofthedis2tributionofremainingoil,andcorrespondingsoftwarewasworkedout.Withthismethod,waterinjec2tionratecanbedeterminedbasedonthelawsofdistributionofremainingoil.Variousprojectscanbeobtainedthroughdifferentcombinationofaugmentedinjectionwells,unadjustedwellsandrestrictedin2jectionwells.Projectscanbeoptimizedusingfuzzymathematics.Fieldapplicationindicatesthatcoinci2dencerateofprojectforecastwithpracticaladjustedlayersis81.5%.Keywords:remainingoil;layeredwaterinjection;fuzzymathematics;optimizationMethodforformationfracturepressurepredictionofwaterinjectionwellsanditsapplication/2006,30(4):16-18WANGLi2jun1,LUBo1,WUFeng2,SHAOZhen2jun3,YANGMin4(1.KeyLaboratoryofMinistryofEducationforEnhancedOilRecovery,DaqingPetroleumInstitu2te,Daqing,Heilongjiang163318,China;2.OilRecoveryPlantNo.7,DaqingOilFieldCrop.Ltd.,Daqing,Heilongjiang163517,China;3.OilRecoveryPlantNo.7,DaqingOilFieldCrop.Ltd.,Daqing,Heilongjiang163511,China;4.TarirmOilfieldCompa