钻井新技术重点.doc

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1、1.Horizontaidrilling：Horizontaidrillingistheprocessofdrillingawellfromthesurfacetoasubsurfacelocationjustabovethetargetoilorgasreservoircalledthe"kickoffpoint"(KOP),thendeviatingthewellborefromtheverticalplanearoundacurvetointersectthereservoiratthe"entrypoint"withanear-horizo

2、ntaiinclination,andremainingwithinthereservoiruntilthedesiredbottomholelocationisreached・2.ExtendedReachDrilling：ExtendedReachDrillingisdrillinghorizontallyfromaboreholethatisbeganasaverticalhole・Bytheuseofangle-buildingassemblies,thedrillgraduallyassumesahorizontalattitudeand

3、drillslaterallytheproductiveformation.It'slateraldepartureismorethantwiceoftureverticaldepth(TVD).3.MultilateralwellDrilling：Amulti-lateralwellisoneinwhichthereismorethanonehorizontalornearhorizontailateralwelldrilledfromasinglemainboreandconnectedbacktothatmainbore・4.Managedp

4、ressuredrilling(MPD):"anadaptivedrillingprocesstopreciselycontroltheannularpressureprofilethroughoutthewell".Themainideaistocreateapressureprofileinthewelltostaywithinclosetolerancesandclosetotheboundaryoftheoperationenvelopedefinedbytheporepressure,holestabilityenvelopeandfra

5、cturepressure.5.SlidingSteeringsystem:Slidingsteeringsystemadjustorchangethedrillingbit'sorientationbyusingdown-holeBenthousing(down-holemotor)whilethedrillingstringsareinnon-rotationstatus.6.RotarySteeringsystem:Rotarysteeringsystemadjustorchangethedrillingbit'sorientationbyu

6、singdowrvholesteeringtoolwhilethedrillingstringsareinrotationstatus.Duetothelimitationoftoolplacement,itlacksnear-bitgeologicparametermeasurement,thisformssignificantdiffereneebetweenRotarysteeringandGeologysteeringsystem.7.Loggingwhiledrilling(LWD):Asystemwhichprovidesreal-ti

7、meloggingdatafrommeasurementsmadenearthedrillbitduringthedrillingprocess8.Slimholedrilling:Ameasofreducingthecostofawellbydrillingasmallerdiameterholethaniscustomaryforthedepthandthetypesofformationstobedrilledthrough・Aslimholepermitsthescalingdownofallphasesofthedrillingandco

8、mpletionoperations.9.GeologicalSteering:Usinggeologicalprinci