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:1999207230:(1963-),(),,,,:100025870(2000)0220033203(,257062)():,,,,,,:;;;;;:TE355.5:A:,,,,,,,,,11.1[1],,sdsl,,,Fg=6d3s(s-l)g.(1)FD=8CDlu2sd2s.(2),us;CD,CD(Re)s(Re)s(Re)s=lusds.(3),FDFg,,()(1)(2),us0us0=4gds(s-l)3CDl.(4),us0(Re)s(1)(Re)s1,Stokes,us0=g(s-l)d2s18.(5)(2)1(Re)s1000,Allenus0=0.20g(s-l)l0.72d1.18(/l)0.45.(6)(3)1000(Re)s20000,200024()Vol.24No.22JournaloftheUniversityofPetroleum,ChinaApr.2000Newton,us0=1.74g(s-l)l0.50d0.50s.(7)(Re)s(1,1000),,Allen1.2,,,,,Swanson[2],us0=un1+48dslun-1.(8)un=4gds(s-l)3l.(8),Swanson,,,23.7%60.3%,,,,us0s=us0.(9),us0s;;us02650kg/m3,(mm)0.105,0.149,0.208,0.3550.417;1mPas;774kg/m3,2.1134mPas;11;2m30mm1,11000,Allen1,,,0.9251ds/mmus0/(ms-1)0.4170.069970.059500.076390.064120.9160.9280.3550.057990.049320.063170.053030.9180.9300.2080.030960.026300.033620.028220.9210.9320.1490.020800.017780.022680.019040.9170.9340.1050.013850.011730.015010.012600.9230.9312,,,;,,,2.1,,,,,u(r)=p4l(r20-r2).(10),u(r)r;p/l;;r0(10),,,umax=p4lr20.(11)2r0/2, u=p8lr20.(12)(10)r43()20004 ur0r=p8l(r20-r2).(13) ur0r u=1-rr02.(14),,,,,2r0/2,;2r0/2,2.2,,,,,1,(mm)0.417,0.355,0.2880.149,4m30mm,21,,222ds/mm0.4170.288 u/(ms-1)00.018240.037330.064400.081900.102480.1169100.015470.022240.038610.055780.07138us/(ms-1)0.069970.064320.056820.048450.043820.037370.030660.030960.026400.023930.018570.014270.00878ds/mm0.3550.149 u/(ms-1)00.017890.029990.044900.059870.074960.0902800.012560.021640.030450.039160.04592us/(ms-1)0.057990.051210.046590.041020.034360.028910.023260.020800.016680.013400.009970.007900.0046122,,2:0.417mm:us=0.06989-0.32720 u;(15)0.355mm:us=0.05810-0.38813 u;(16)0.208mm:us=0.03094-0.30812 u;(17)0.149mm:us=0.02089-0.34737 u.(18),us; u(1518)0.9877,0.9912,0.99370.9956,4,,(43)53242:Qc=2kh(pe-pw)ln(re/rw).(14)(13)(14)QcQ=lntanbe4de/tanbo4de+lnao+boai+bi/ln(re/rw).(15)2re/rwQc/Q,,,2Qc/Q(%)12345678910re/rw1010091.480.471.263.757.552.147.643.640.110010095.790.185.381.478.075.272.670.368.2100010097.193.490.287.685.483.481.780.278.81000010097.895.092.790.789.087.686.385.184.111121314151617181920re/rw1037.134.431.929.827.826.124.523.121.820.710066.464.663.061.560.158.857.656.455.354.3100077.676.475.374.373.472.571.770.970.269.51000083.282.381.580.780.079.478.878.277.677.1:[1]CollinsRE.FlowofFluidsThroughPorousMaterials[M].Tulsa:ThePetroleumPublishingCompany,1976.[2]T.D..[M].,.:,1992.8486.[3]MuskatM.TheFlowofHomogeneousFluidsThroughPorousMedia[M].NewYorkandLondon:McGraw-HillBookCompany,1937.181186.[4]MortadaM.Anapproximatemethodfordeterminingarealsweepefficiencyandflowcapacityinformationswithanisotropicpermeability[J].SPEJ,December,1961:277286.[5],.[J].(),1993,17(4):4047.()(35)-0.34271,4,us=us0s-0.34271 u.(19)(19),2.918,,3(1),(2),,(3),,:[1].[M].:,1980.230235.[2],.[M]..:,1986.1220.()34242:whichprovesthatthecorrectnessoftheellipseofplasticityisopentodoubt.Somenewdesigningtheoriesforcombinedstressshouldbedeveloped.Keywords:casingstring;strengthdesign;ellipseofplasticity;theforthstrengththeory;pressure2areamethod;buoyancy2factormethodAbouttheauthor:HanZhi2yong,male,professor,graduatedfromBeijingPetroleumInstitutein1962.NewheworksondirectionalwelldrillinganddrillingmechanicsattheDepartmentofPetroleumEngineeringintheUniversityofPetroleum,China(EmailAddress:hanzhy@hdpu.edu.on)WangXing2feng,GeJia2li,WangRui2quanandZhaoLan2shui/AMODELFOROPTIMALLOCATIONOFTHEPOLYMERSTATIONSFDRTERTIARYOILRECOVERY/2000,24(2):2529Mostofwater2floodingoilfieldsinchinaundergotheirhigh2waterdeclineperiodsatpresent.Thepolymerflood2ingorASPfloodingbecomesanindustrytoimprovetherecoveryofthesefields.Becauseofthespecialcharactersofthisdevelopmentmethod,thepolymerstationsmustbesharedamongseveralreservoirsinspaceanddevelop2menttimeinordertoupgradetheirserviceefficiency.Thelocationofthepolymerstationisanewemergedproblem.Applyingthetheoryofthenetworkflow,anoptimaldecisionmodelisdeveloped.Itisahybridmodelofinventorymodelandlocationmodel.Furthermore,thetailoredalgorithmisprogrammed.Whenthedevelop2ingtimeandthelocationofinjectingstationsinreservoirsaregiven,thisprogramcangivetheconstructionscale,locationandtheservicenetworkofinjectingstationsforminimizedinvestment.Anexampleforlocatingpolymerstationprovesthatthemodelisreasonable,and3%5%investmentcanbesavedbyusingthismod2el.Keywords:tertiaryoilrecovery;polymerflooding;optimalmodel;polymerstation;networkAboutthefirstauthor:WangXing2feng,male,obtainedMSdegreefromtheUniversityofPetroleumin1998.NowheisaPh.DcandidateandworksonoilandgasreservoirdevelopmentattheDepartmentofPetroleumEngineeringintheUniversityofPetroleum,China(Beijing:102200).WuNing,ShiZai2hong,ZhangQiandQuZhan2qing/SIMULATIONOFPRODUCTIONSITUATIONINSTEAMASSISTEDGRAVITYDRAINAGEWELLBORE/2000,24(2):3032Steaminjectionrecoveryisanefficientmethodforheavyoilrecovery,andsteamassistedgravitydrainage(SAGD)isaspecificapplicationbycombininghorizontalwellwithsteaminjectionrecoverytechnique.Thewelltrajectoryiscalculatedwiththenumericalanalyticalmethod.Theformulasaredevelopedusingtheprinciplesofmultiphasehydromechanicsandheatconduction,andusedtocalculatewellboreoper