高温高压井中温度和压力对钻井液密度的影响

:1999)06)21:(1967)),,1995,1997,30,56,:010)62097572(:901)7572),:62097592汪海阁1刘岩生2杨立平2(11石油勘探开发科学研究院钻井所,北京学院路100083,21中国海洋石油总公司渤海石油公司,天津塘沽300456)(ESD);ESD:ESD,ESD,ESD,ESD,ESD,,ESD;,,ESD:TE254+6:A:1006)768X(2000)01)0056)05EffectoftemperatureandpressureondrillingfluiddensityinHTHPwellsWANGHai-ge(ResearchInstituteofPetroleumExplorationandDevelopment,Beijing100083,China)Abstract:Thepaperhasstudiedtheeffectofformationtemperaturegradient,surfacetemperature,circulatingtemperaturegradient,drillingfluidinlettemperatureanddrillingfluidtypeonEquivalentStaticDensity(ESD).TheintegratingmodelofESDhasbeenestablished.Theresultsshowthattem-peraturegradienthasgreatimpactonESD.ESDdecreaseswithtemperatureincreasing,andtheESDdifferencebetweenwellsurfaceandbottomislarge.WhileESDdecreaseswithsurfacetemperatureordrillingfluidinlettemperatureincreasing,buttheESDdifferenceissmall.DrillingfluidHTHPbehav-iordiffersfordifferentdrillingfluidsystems.Duringstaticstate,ESDdecreaseswithwelldepth,whileESDincreaseswithwelldepthduringdrillingfluidcirculating.Keywords:deepwellsdrilling,temperature,pressure,drillingfluid,density1,,,,,,,100MPa200e,,,(1:0179,497618m,201e,0168,#56#DRILLING&PRODUCTIONTECHNOLOGYVol123No111Jan.200014%),,,,;,,,;,,,,,,,,,,,,,,2211/0/0,,,,,,,,KeelanAdamson,112;Kutasov,122;TexasPeter132;Kemp142;Mcmordie152;Hoberock,162;Babu,,172,,/0/0/0,,13-62,Hoberock,162:Q(P,T)=Q0fV0+QwfVw+QsfVs+QcfVc1+fVoQ0Q0i-1+fVwQwQwi-1(1)/0,(),,12,52,,,212,,:Qm=Qmo@eA(P-P0)-b(T-T0)+c(T-T0)2(2)(2),P0T0Pm0,115e(2),Hc(TcPc),,,Qm=Qm0,,Qm=Qm0,:A(Pc-P0)-b(Tc-T0)+c(Tc-T0)2=0(3):Hc=b(Tc-T0)-c(Tc-T0)2AQmoK-P1-P0AQm0K(4)(4),P0=P1,Hc:Tc-T0=b?b2-4Ac@Hc@Qm0@K2c(5):P1T1(5)Hc,Tc,,,QmQm0;,Tc,,,QmQmo1(5)(Tc-T0)Hc1#57#2000年第23卷第1期钻采工艺141122Qmo(kg/m3)a(1/Pa@10-6b(1/u)@10-4c(1/(u@u)@10-712166310296113547-41144421290313815213489-4123663216351195121963701746413206151464134141141441213(2),PQm,PQm:dPdh=K@Qm(6)K(2)(6):dPdh=K@Qmo@eA(P-P0)-b(T-T0)+c(T-T0)2(7):T-T0=G(h)(8)G(h)T1Q(8)(7),P1=P0,:P=P0+1A@ln11-AKQmo@F(h)(9)F(h)=Qh0e[c@G2(h)-b@G(h)]dh(10)ESD:ESD=P-P0K@h(11)(9)(11):ESD=1AKh@ln11-AKQmo@F(h)(12)3ESD(ESD),ESD,,221166g/cm3(No.1)ESD,ESD,ESD2ESD(No.1T1=25e)3,ESD,ESD4,ESD,ESD55#58#DRILLING&PRODUCTIONTECHNOLOGYVol123No111Jan.20003ESD(No114e/100m)4ESD(No.1),ESDESD,ESD;ESD5ESD(No.1)66(),ESD;,ESD6ESD(No.1)787ESD8ESD9(No.1)(No.3)9ESD10(No.2)(No.4)10,10ESD#59#2000年第23卷第1期钻采工艺ESD,ESD;,ESD,ESD4(1)(2),,ESD(3),;ESD(4),,;,,(5),,;,,[1]KeelanAdamsonetal.High-Pressure,High_Tempera-tureWellConstructionOilfieldReview1998Summer.[2]Kutasov,I.M.EmpiricalcorrelationdeterminesdownholemuddensityOil&GasJournalVo1.61Dec1219881[3]E.J.PeterOilmud:AMicrocomputerProgramforPre-dictingOil-BasedMudDensitiesandStaticPressureSPEDrillingEngineering1991.31[4]N.P.KempDensityModelingforPureandMixed-SaltBrinesasaFunctionofComposition,TemperatureandPressureSPE160791[5]W.C1McmordieJr.etal,EffectofTemperatureandPres-sureontheDensityofDrillingFluidsSPE111141[6]L.L.Hoberock.etal,BottomHoleMudPressureVaria-tionsDuetoCompressibilityandThermalEffects,paperpresentedatthe1982IADCDrillingTechnologyConfer-ence,Houston,March9-11.[7]D.R.BabuEffectofMudBehavioronStaticPressureDuringDeepWellDrillingSPEDrilling&Completion1996.6.(:;:)#60#DRILLING&PRODUCTIONTECHNOLOGYVol123No111Jan.2000