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3:(NSFC)49894190-12:2002-04-16:0253-9985(2003)01-0018-0631,2,1,1,1,1,2,2(1.,130061;2.,163712):/,412,-;;;,,(5090)NNENNW:;;;;:,,43,,:TE112.222:A1/,[111],,,,,--,:(1),(2),/,,(3)(4),,;,(5),,,,(6),(7),,(8),2313241OIL&GASGEOLOGY20033,,-,-113,1Table1Classificationofvolcanicfaciesandreservoirspacetypesinthebasin()321()321()3,,,2,,1,,(),()3,21500m,,12113:,,();,,,,,,,,2001XS-1,3450m,,,,,-1:19212,-,,,,,,(1),()1Fig.1Plateofvolcanicsub-facies:,;:,;:,;:,,,,,-,3,,,,,5,,()()-,,2024,120Ma[1213](5090)NNENNWNNE(SN),,-,4520Ma3,,3,,,11(970206-01-02)120002ZS-VI-Fig.2Faciesanalysisofdeepvolcanic-sedimentaryrocksinZS-VIwell1:21,10%90%,,2ZS-19971998,35783597m,,,,,35283570m,,300m3,,ZS-,,,ZS-(3),ZS-107-113,310ZS--ZS-Fig.3CorrelationofvolcanicfaciesinZS-VIIIandZS-VIwellsinVII,0linestructuralsectionandpredictedsectionofreservoirsinSongliaobasin4(1)313,,-(2)-;;;,,2224(3)5,,()()-,,,120Ma(5090)NNENNW,;10%,90%1-BC,E,MA.[M].,,.:,1978.10822LajoieJ.Faciesmodels15:volcaniclasticrocks[J].GeoscienceCanada,1979,6(3):1291393,.[M].:,1980.20404FisherRV,SchminckeHU.Pyroclasticrocks[M].Heidelberg:Springer,1984.592655CasRAF,WrightJV.Volcanicsuccessionsmodernandancient[M].London:Allen&Unwin,1987.593336.[M].:,1994.12317,.[M].:,1994.40498,,,.[M].:,1996.10229,.-[M].:,1996.407110,.[M].:,1997.1811,,.[J].,1997,11(6):23724312WangPujun,LiuWanzhu,WangShuxue,etal.40Ar/39ArandK/ArdatingonthevolcanicrocksintheSongliaobasin,NEChina:constraintsonstratigraphyandbasindynamics[J].InternationalJournalofEarthSciences,2002,91(2):33134013WangPujun,RenYanguang,ShanXuanlong,etal.TheCretaceousvol2canicsuccessionaroundtheSongliaoBasin,NEChina:relationshipbe2tweenvolcanismandsedimentation[J].GeologicalJournal,2002,37(2):119RELATIONSHIPBETWEENVOLCANICFACIESANDVOLCANICRESERVOIRSINSONGLIAOBASINWangPujun1ChenShumin2LiuWanzhu1ShanXuanlong1ChengRihui1ZhangYan1WuHaibo1QiJingshun1(1.CollegeofEarthSciences,JilinUniversity,Changchun,Jilin;2.DaqingExplorationandDevelopmentInstitute,Daqing,Heilongjiang)Abstract:Basedonthestudyofcores,wellcuttings,andoutcropsections,thefaciesofvolcanicrockscanbedividedinto4typesand12sub-facies.PoresandfissuresarethetwomajortypesofreservoirspacesinvolcanicrocksinXuji2aweizifault-depression.Thetypesofreservoirspaceinvolcanicreservoirshavebeenfoundtobecontrolledbythefa2cies.Thevolcanicreservoirsfoundinvariousfaciesbeltshavequitedifferentporesandfissuresandtheirassemblages.Gascavities,fissuresinrhyoliticlamination,andjointfissureshavebeenidentifiedmainlyineruption-overflowfa2cies.Themainpore-typeidentifiedinexplosivefaciesisintergranularpore;andinter-brecciaporeandprimaryfrac2turearedominantinextrusivefacies.Jointfissuresandvariousprimaryfracturesaremainlydevelopedinvolcaniccon2duitfacies.Itisfoundthatunconsolidatedformationoftendistributesatthebaseofeachcoolingunitinexplosive(PleaseTurntoPage27)1:23OCCURRENCESOFVOLCANICROCKSINXUJIAWEIZIFAULT-DEPRESSIONANDTHEIRSIGNIFICANCEChengRihui1LiuWanzhu1ShanXuanlong1ChenShuming2QuYongbao2(1.CollegeofEarthSciences,JilinUniversity,Changchun,Jilin;2.DaqingOilfieldCompany,CNPC,Daqing,Heilongjiang)Abstract:ThevolcanicrocksinXujiaweizifault-depression,Songliaobasin,wasmainlyeruptedinLateJurassictoEarlyCretaceous.Theiroccurencesarecharacterizedbyacertaingeometricpattern.Onthebasisofthestructuralposi2tionofvolcaniceruptionandtheoccurrencesinthebasin,threetypesoferuptionhavebeenidentified,includingeruptionontheupthrownsideoffault,alongfracturebeltandondownthrownside.Differentoccurrencesareoftencorrespondingtodifferentbasinstructures.Thevolcanicrocksoccurringalongfaultplanewouldtransitgraduallytosublacustrinefanturbiditefan;thevolcanicrocksoccurringontheupthrownsideoffaultwoulddistributeinthemannerofalternatingbedsofvolcanicrocksandsandstones;thevolcanicrocksoccurringonthedownthrownsidehavemostlybeencoveredbyfinegrainsediments.Keywords:volcanicrock;fault;occurences;basinfilling;Songliaobasin(ContinuedfromPage23)explosivefacies,whichmightberesultedfromfastcoveringandconservationoftheweatheredcrustsoftheoriginalbasementrocksorunclinkereddriftingclasts.Alargeunconsolidatedbodiesinrock-domecanoftenbefoundintheinnerbeltsub-faciesofextrusivefacies,whichareactuallyoflargeaccumulationbodiesofperliteballs.Specialattentionshouldbepaidtolookingforthesetwo-typereservoirsintheintermediate-acidicvolcanicrockarea.Themajortectoclaseinthisareaisasetofconjugated,high-angle(faultplanewithdipangleof5060),NNEandNNWstrike,andshearorcompressive-shearfractures,whichconstitutethemainmigrationpathwayofoil&gas.Keywords:volcanicrockfacies;volcanicreservoir;classification;unconsolidatedformation;Songliaobasin1:27