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ID:40046843
大小:849.81 KB
页数:11页
时间:2019-07-18
《A Rapid Method of Predicting Width and Extent of Hydraulically Induced Fractures》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、2958ARapidMethodofPredictingWidthandExtentofHydraulicallyInducedFracturesJ.Geertsma,SPE-AIME,Koninklijke/ShellExploratieenProduktieLaboratoriumF.deKlerk,Koninklijke/ShellExploratieenProduktieLaboratoriumIntroductionDuringthehydraulicfracturingtreatmentofanoiloringassump
2、tionshavehadtobemade:gaswelltheliquidpressureintheboreholeisin-1.Theformationishomogeneousandisotropicascreaseduntiltensilestressinthesurroundingrockregardsthoseofitspropertiesthatinfluencethefrac-exceedstensilestrength.Onceatensilefractureisture-propagationprocess.init
3、iated,itispenetratedbyliquidfromtheborehole2.Thedeformationsoftheformationduringfrac-andfracturepropagationundercontinuoushydraulicturepropagationcanbederivedfromlinearelasticactiontakesplace.Thefracturingliquidcarriesastress-strainrelations.proppingagenttoensureahighly
4、permeableflow3.Thefracturingfluidbehaveslikeapurelyviscouschannelafterpressurerelease.liquid;i.e.,anypeculiarflowbehaviorduetotheaddi-Fieldresultsrangefromfailuretoobtainincreasedtionofgellingagentsorotheradditivesisneglected.productiontooutstandingsuccess.Inallcases,ho
5、w-Moreover,theeffectoftheproppingagentdistribu-ever,itunfortunatelyremainsuncertainwhetherthetiononthedistributionoffluidviscosityinthefrac-valueschosenfortheoperationalparameters,suchastureisnottakenintoaccount.injectionrate,pumpingtimeandfluidviscosity,were4.Fluidflow
6、inthefractureiseverywherelaminar.infacttheidealones.Thoughexperienceprovidesa5.Simplegeometricfracture-extensionpatternsarelead,amoresatisfactorywaytopredictresultswouldassumed—eitherradiallysymmetricalpropagationseemtobetosubjectthefracturepropagationprocessfromapoints
7、ource@lg.1A)orrectilinearpropaga-toatheoreticalanalysisthat(1)makesthemaximumtionoriginatingfromalinesource(Fig.1B).Intheuseoftherelevantphysicalinformationand(2)sofirstcasetheperipheryofthefractureiscircular,insimpliiestheresultingcalculationsthatthefielden-thesecondca
8、seitisrectangular.gineergetspracticaldatathathecanhandlecomfort-6.Arectilinearpropagationmodecanbeacconl-ably.
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