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:1000-7393(2007)06-0095-0431,22(1.,257061;2.,524057):,3:,,,,2,,:;;;;;;:TE256.6:A3:,;,;,,,(),,:+(),,Hallibur2tonGas-chekGastopLatex2000DowellGasblockD600,KQG69,,,,323,,API,,1,,,,,,296Vol.29No.6200712OILDRILLING&PRODUCTIONTECHNOLOGYDec.20073:,19602003,,,:0759-3901682,E-mail:zhaoyz@cnoocs.com;,,;,,,1.11,UU,0;,,,,p2,p1p2,U,p1-p2,p2p1;,,U,p1-p2;U,,p21Up1-p2,,,1.21HALAD344/413L,1HALAD344/413L/kPa581013182225301417,,,C-S-H;,,,,,,,,,,,22.1,CG71LEXP-1(1822kPa),,(2),2EXP-1/%/MPaFL/mL/cm1d2d3d3d012.5565.115.115.115.110.515.5435.125.125.125.12120.5355.145.155.165.172.22.2.1,p=4AL/D(1),p,Pa;A,Pa;L,m;D,mm(1),(ª311114mmª244.47mm)(ª244.47mmª177.8mm,ª152.4mmª114.3mm,500m),DL,,69200712(29)6,,,,,,,,,,,,,2.2.220-1-2ª244.47mm12-1ª114.3mm,,+,1.94g/cm3,12-13312-1ª114.3mm/mm/mm/()/m/m/mW12-1-B4152.4114.337.8738153395420W12-1-B11152.4114.337.5336613248413W12-1-B12152.4114.331.8340433702341W12-1-B1152.4114.346.503403297742633.1,CG71LFQJ,(2),,,,,,,2FQJFQJ,FQJ(4),4FQJFQJ/%/min10203040451.02402202401902201802001501604,,160min,3.23.2.1(1),(ª244.47mmª177.8mm,ª152.4mmª114.3mm,500m),DL,,,3.2.220-1-2ª177.8mm,4047.5m,704m,2.14g/cm3,154+,2.35g/cm3,CBL,4(1)(2)79:(3)(4)(5):():[1],,.[J].(),2004,16(4):266-268.271.[2],,.[J].,2004,24(2):55-58.[3],,,.[J].,2000,28(3):24-26.[4].SEP-[J].,1998,21(3):65-67.[5],,.DB[J].,199916(2):109-112.[6].[J].,1999,27(1):35-36.[7],,.[M].:,2001.[8].[J].,2005,27(6):40-42.(2007-08-13)(94)4(1)2:;(2):;;:[1].[J].,1996,11(2):18-20.[2],.[J].,1998,14(1):4-7.[3].[D].,2003.[4].AugerTLP[J].,1993,6(3):11-14.[5]PHILIPSNH,GRAINGERM.Developmentandapplica2tionofkinetichydrateinhibitorsinthenorthsea[R].SPE40030,1998.[6]DAVISONJM.Rheologyofvariousdrillingfluidsystemsunderdeepwaterdrillingconditionsandtheimportanceofaccuratepredictionsofdownholefluidhydraulics[R].SPE56632,1999.(2007-08-13)89200712(29)6foundprioritycenteringofcasing,negativedensitygradientstructureofcementmilk,highefficiencyviscositybreakofcirculationfluid,intensivedrawofisolationfluidandthickdisplacementslowofce2mentmilk,allthesewereeffectivemeasurestode2creasebypassingflowandimprovethedisplacementef2ficiency.Cementjobsofmorethan10wellsinSouthChinaSeazonewereallbigsuccessandthecementqualitycametofinenesslevel.Keywords:wellcementation;bypassingflow;displacementefficiency;casingcentralization;nega2tivedensitygradient;thickcementgroutLUOYu2wei,ZhanjiangOilChemistryDepartmentChinaOilfieldServicesLtd.,CNOOC,Guangdong,524057Hightemperatureandpressuredrillingfluidtechnologyinsouthchinasea.ZHAOWen,XIEKe2jiang.ODPT,2007,29(6):87289Abstract:WesternSouthChinaSeazoneisoneofthethreehightemperatureandpressureplacesintheworld.Itischaracterizedbyhighgeothermalgradi2ent,highpressureandnarrowpressurewindow.Influ2enceofjointhightemperatureandpressuretodrillingfluidperformanceshouldbeovercometomakesureafastandsafedrilling.Technologydifficultyofwaterbasedrillingfluidunderhightemperatureandpressureaswellasinfluenceandmechanismofhightempera2tureandpressuretodrillingfluidweresimplyana2lyzed.Drillingfluidtechnologysuitableforhightem2peratureandpressurewellsinwesternSouthChinaSeazonewassummedupandresearchedbyanalyzingsci2entificpayoffsandthepracticeexperiencesofallthe19wellsdrilledbetween1984and2004.Keywords:hightemperatureandpressure;drillingfluidtechnology;researchZHAOWen,ZhanjiangOilChemistryDepartmentChinaOilfieldServicesLtd.,CNOOC,Zhanjiang524057,Guangdong,ChinaDrillingfluidtechniqueinsouthwestwei.CHENGYu2shan,FUShi2shan.ODPT,2007,29(6):90292Abstract:GeologyinsouthwestWeiisverycom2plicated,anditisrelativelydifficulttodrillwellsthere.ShaleofWeiandLiuformation2seriesisquiteeasytocollapse.Also,becauseoftheirdifferentdepo2sitionconditions,physicalpropertyandcollapsingde2greeoftherockvaryfromeachother.UnexpectedconditionshappenedoftenintheprocessofdrillinginWeizhou1221NandWeizhou1124Dblock.Nowadays,hi2strengthsealingpetroleumbasedhydraulicfluidisstillusedwhendrillinginsouthwestWeizone.Withthedevelopmentofdrillingfluidtechnology,returnsratioofdrillingexplorationwellwithhi2strengthsealingwaterbasedrillingfluidbecomeshigherandhigherbythetechniqueimprovement.Thetechniquesofdrillingexplorationwellwithhi2strengthsealingwaterbasedrillingfluidinsouthwestWeizoneweresummedheretosupplyexperienceforitsfurtheruseinfield.Keywords:southwestWei;explorationwell;waterbasedrillingfluid;crashdown;blankoffCHENGYu2shan,ZhanjiangOilChemistryDe2partmentChinaOilfieldServicesLtd.,CNOOC,Zhan2jiang524057,Guangdong,ChinaFormationstudyofgashydrateindeepwaterdrillingfluidsystem.HUWen2jun,XIEKe2jiang,ZHAOWen,ZHOUTao.ODPT,2007,29(6):93294Abstract:Offshoreoilexplorationhasbeengoingtomarinedeepwatergraduallytofindnewoilresourceinlatestyears.However,thedeepwaterchallengesgreatlytowelldrillingandcompletion.Nowadays,do2mesticstudyofdeepwaterdrillingfluidisinanearlystageandexperimentmeansislacking.Themethodofpreventinggashydrateformationwasdevelopedthroughthecloseformationstudyofgashydrateindeepwaterdrillingfluidsystemcombinedwithrelatedsimulatedtestresults.Thatistocontrolthepressureinwell2borebyadjustingthedrillingfluidin2situandde