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ID:40070812
大小:2.70 MB
页数:229页
时间:2019-07-19
《Gas-Lift-Technology Schlumberger》由会员上传分享,免费在线阅读,更多相关内容在学术论文-天天文库。
1、SchlumbergerGasLiftDesignandTechnologySchlumbergerWellCompletionsandProductivityChevronMainPass313OptimizationProject09/12/00GASLIFTDESIGNANDTECHNOLOGY1.Introduction&BasicPrinciplesofGasLift1-1GasLiftDesignAndTechnologyÓSchlumberger19991.Introduction&BasicPrinciplesofGasLift
2、CHAPTEROBJECTIVE:Togiveanoverviewofgasliftprinciplesandtheirapplicationswithillustrationsofcontinuousandintermittentgasliftinstallations.Mostwellscompletedinoilproducingsandswillflownaturallyforsomeperiodoftimeaftertheybeginproducing.Reservoirpressureandformationgasprovideen
3、oughenergytobringfluidtothesurfaceinaflowingwell.Asthewellproducesthisenergyisconsumed,andatsomepointthereisnolongerenoughenergyavailabletobringthefluidtothesurfaceandthewellwillceasetoflow.Whenthereservoirenergyistoolowforthewelltoflow,ortheproductionratedesiredisgreatertha
4、nthereservoirenergycandeliver,itbecomesnecessarytoputthewellonsomeformofartificiallifttoprovidetheenergytobringthefluidtothesurface.ThetypesofartificialliftavailableareillustratedinFigure1-1.Whengasliftisused,high-pressuregasprovidestheenergytoenablethewelltoproduce.FIGURE1-
5、1:ArtificialLiftSystems1-2GasLiftDesignAndTechnologyÓSchlumberger1999Whenawelliscompleted,aseriesofconductorpipesandaccessoriesareinstalledduringwellcompletionoperations.ThebasiccomponentsofthesystemarelabeledinFigure1.2.Thisisasimplifiedillustrationofacasedholesinglezonecom
6、pletion.Dualandtriplecompletionsaremuchmorecomplexandwillnotbeconsideredhere.Theinnersurfaceofthewellboreissupportedbythecasingstring.Theremaybeuptothreeseparatecasingstringsincludingasurfaceandintermediatestring.Thespacebetweenthetubingandcasingiscalledtheannulus.Thepackers
7、ealstheannulusjustabovetheproducingzone.Thecasinghasbeenperforatedadjacenttotheproducingzonetoallowentranceofgasandliquidproductsintothewellboreorthetubingstringmayextendintotheopenhole.Whenreservoirdrivedoesnotprovideenoughpressuretoliftfluidstothesurface,additionalequipmen
8、tmustbeinstalledtohelpliftthefluids.Therearefourbasictypesofartificiallift:
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