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氮气欠平衡钻井技术在李16井的应用 Title:ApplicationofNitrogenBalanceDrillingTechniqueinWellLI16 Introduction: Theuseofnitrogenbalancedrillingtechniquehasgainedsignificantattentionintheoilandgasindustryduetoitsabilitytoeffectivelycontrolformationpressuresandimprovedrillingefficiency.ThispaperaimstodiscusstheapplicationofnitrogenbalancedrillingtechniqueinwellLI16,highlightingitsbenefits,challenges,andrecommendationsforfutureimplementation. 1.BackgroundofWellLI16: WellLI16islocatedinachallengingdrillingenvironmentwithhigh-pressureformationsandcomplexlithology.Thewellhasencounteredseveralchallenges,includingformationdamage,lostcirculation,anddifferentialsticking,whichhaveimpactedthedrillingprogressandoverallefficiency.Therefore,theapplicationofinnovativetechnologiessuchasnitrogenbalancedrillingiscrucialtoovercomethesechallenges. 2.NitrogenBalanceDrillingTechnique: 2.1Principle: Thenitrogenbalancedrillingtechniqueinvolvesinjectingnitrogengasintothedrillingfluidtomaintainpressurebalanceduringdrillingoperations.Bydoingso,thedrillingfluiddensitycanbeadjustedtobeslightlylowerthantheformationpressure,preventingformationdamage,lostcirculation,anddifferentialsticking. 2.2Benefits: -FormationPressureControl:Theuseofnitrogengasallowsforprecisecontrolofformationpressures,minimizingtheriskofblowoutsanddecreasingformationdamage. -EnhancedDrillingEfficiency:Thereductioninformationdamageanddifferentialstickingenablesfasterdrillingrates,resultingincostsavingsandimprovedoveralldrillingefficiency. -IncreasedWellboreStability:Thenitrogenbalancedrillingtechniquehelpsinstabilizingthewellbore,reducingtheoccurrenceofwellboreinstabilityissuessuchasholecollapseandmudlosses. -LowerEnvironmentalImpact:Nitrogengasisinertandenvironmentallyfriendly,minimizingthereleaseoftoxicorhazardouschemicalsintotheenvironment. 3.ApplicationofNitrogenBalanceDrillinginWellLI16: 3.1DrillingFluidDesign: ThedrillingfluidforwellLI16wasspeciallyformulatedtoincludenitrogengasasanadditive.Thenitrogeninjectionratewascarefullyoptimizedtom