塔里木盆地北部奥陶系油气相态及其成因分析.docxVIP

塔里木盆地北部奥陶系油气相态及其成因分析.docx

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塔里木盆地北部奥陶系油气相态及其成因分析

*塔里木盆地北部奥陶系油气相态及其成因分析张水昌1朱光有1杨海军2苏劲1杨德彬1朱永峰2张斌1崔洁1ZHANGShuiChang1,ZHUGuangYou1,YANGHaiJun2,SUJin1,YANGDeBin1,ZHUYongFeng2,ZHANGBin1andCUIJie1中国石油勘探开发研究院,北京1.1000832.中国石油塔里木油田勘探开发研究院,库尔勒8410001.ResearchInstituteofPetroleumExplorationandDevelopment,PetroChina,Beijing100083,China2.ResearchInstituteofPetroleumExplorationandDevelopment,TarimOilfieldCompany,PetroChina,Korla841000,China2010-09-09收稿,2010-12-18改回.ZhangSC,ZhuGY,YangHJ,SuJ,YangDB,ZhuYF,ZhangBandCuiJ.2011.ThephasesofOrdovicianhydrocarbonandtheiroriginintheTabeiuplift,TarimBasin.ActaPetrologicaSinica,27(8):2447-2460AbstractOrdovicianreservoirsofthenorthernTarimBasinwithabundanthydrocarbonresourcesareoneofthemostimportantexplorationtargets,andtheyhavemanycomplexhydrocarbonphases,suchascondensates,normaloils,heavyoilsandasphalts.Throughanalysesoftheformationandconservationprocessofmarineoilreservoirsandintegratedwithgeochemicaldataofhydrocarbonsandfluidinclusions,weshowedthatthecomplexityofhydrocarbonphaseswascontrolledbymulti-stagehydrocarbonchargingandsecondaryalteration.OrdovicianreservoirsintheeasternTabeiareaexperiencedthreestagesofhydrocarboncharging,whichoccurredinLateCaledonian-EarlyHercynian,LateHercynianandLateHimalayan.TheoilinthesereservoirswasgeneratedmainlyfromMiddle-UpperOrdoviciansourcerocks,whilethegaswasderivedfromcrackingofliquidhydrocarbonsassociatedwithCambriansourcerocks.DuringLateHercynian,OrdovicianreservoirsexperiencedhydrocarboncharginginthecentralandwesternregionoftheTabeiupliftandthereoccurredthreestagesofhydrocarbonadjustmentaftertheformationofOrdovicianreservoirs.DuringEarlyHercynian,Silurian-Devoniansequenceswereerodedduetotectonicuplift,whichdestroyedpaleo-reservoirsofCambrianhydrocarbonsintheeastregionandformedasphalts.Thetectonicmovementofpre-TriassicsedimentationinLateHercyniancausedlarge-scaledegradationanddensificationofOrdovicianoils.DuringLateHimalayan,thegasfromtheManjiaersagchargedthesereservoirsfromeasttowest,severelyalteringtheearly-formedreservoirsandformingsecondarycond

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