华北地台东部石炭系_二叠系优质煤储层形成分布控制因素

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8210200810ACTAGEOLOGICASINICAVol.82No.10Oct.2008:973(2002CB211700):2008205207;:2008209208;::,,1963(),,1983,;1987CALGARY,;1992(),;1994:102249,;Email:cjzk@cup.edu.cn,,(),,102249:,,,,;,,,,,,,,,,,:;;;;,,(2m)()(10%,110-3m2)3,,(Harpalanietal.,1990;Laubachetal.,1998;,2001;,2003;,2008),,1,3540106118,,500000km2,,,,,,(,2005a),100200m,,16,218m,612m2,,,(,1993;,2005a)2008,,,,,,,,,,,,(6m),78915,24m,6m,200,(1%),,,,,,,,,,,,,,,()(,1995;,2000),233,7m,24m,,(1%),3,,3.1,(,1996),,,,,,,,(,2005b),(,1983),,,,,,,,13,17%,93.2%,,,3,;,,,,,,,;,,,,,,8,,,,1015km,20%,30%;,20%,10%15%,,,,,423110:,,,,23,20%,60%,40%,15%/km8,15%,30%,15%,5%/km,,3,30%50%,60%;8,15%20%,30%,,3.2,,,,,(Hucka,1989;Purietal.,1991;,2001),,,57/cm,,,1/cm(,1995;,1997;,2001;,2004),,,,,,,,,,,,,,,,,,,,,,,,,()80%,61%,,(15)8.9%,414410-3m2,(3)5%,01110-3m2,,,1%,014%Sr/Ba1126,012019,,;,(GI)(WI)GI=(+)/(++),,,;,WI=/,015,015GI2120851206,31302;GI2101471056,41563,,,WI0140321567,11029WI0136211404,01747,015,,,(1),4,,,,(,1997;,1998;,2000;,2005a,2007),(13)523120081Fig.1LocationofCarboniferousandPermianstratigraphicsequencecorrelationprofilesintheQinshuiBasin1;2;3;41Basinmargin;2correlationprofile;3boreholelocation;4outcropsuccessionlocation,,,,,,,,,127,,,,,,,89235:(1),(2),,,;,623110:21Fig.2CarboniferousandPermiansequenceframeworkanddistributionofcoalbedsofcorrelationprofileinFig.1,QinshuiBasin1Table1ParametersofcoalrocksoftheCarboniferousandPermianGIWI42.2080.4032.6640.5944.0770.6554.5241.40412.0140.8484.8730.3625.7330.396142.9172.56715.2060.5177.0560.67413.5171.0653.2210.9211X15.0070.737,,(3),,,,,,,:,;,723120083-1Fig.3CarboniferousandPermiansequenceframeworkanddistributionofcoalbedsofcorrelationprofileinFig.1,QinshuiBasin,.2000..:,1845.,,,.1983..,29(4):351357.,,,,.2001..,26(6):573577..2001..,18(3):163167..1996..:,468476.,.2005a..,7(1):137144.,.2005b..,25(1):5557.,,,.2007..,34(5):534540..1997..,19(1):7680..2003..,9(3):339358.,,,.2000..,2(1):7779.,,,.2008.11.,82(2):234246..1993..:,117151.,,.2001..,75(4):562569.,.1995..,41(6):487498.,,.2004..,24(5):2123.,.1997..,43(1):8590.,.1998.-.,72(1):6475.,.1995..,15(5):610.HarpalaniS,SchraufnagelRA.1990.Shrinkageofcoalmatrixwithrelaeaseofgasanditsimpactonpermeabilityofcoal.Fuel,69:551556.HuckaBP.1989.AnalysisofcleatinUtahcoalseams.Utah823110:GeologicalandMineralSurveyOpen2fileReport154.JinZhenkui,WangChunsheng.2005.SedimentaryconditionsforgoodcoalreservoirdevelopmentintheCarboniferousandPermian,QinshuiBasin.ChineseScienceBulletin,50(suppl.):1723.LaubachSE,MarrettRA,OlsonJE,etal.1998.Characteristicsandoriginsofcoalcleatareview.InternalJournalofCoalGeology,35(12):175207.PuriR,EvanoffJC,BruglerML.1991.Measurementofcoalcleatporosityandrelativepermeabilitycharacteristics.SPE21491,93103.ControllingFactorsofReservoirofCoalRocksinCarboniferousPermian,NorthChinaJINZhenkui,SUNina,WANGChunshengEducationMinistryKeyLabofHydrocarbonGeneratingandAccumulatingofChinaUniversity(Beijing),Changping,Beijing,102249AbstractThereservoirabilityofcoalrocksiscontrolledbybothsedimentaryfaciesanddiagenesis.Sedimentaryfaciescontrolsthecontentofashandmicrocomponentsofcoalrocks,whichfurtheraffectthereservoirabilityofcoalbeds.Thereexistsquantitativerelationbetweentheashproductionrateandtheporosityandpermeabilityofcoal.Themoretheash,thelowertheporosityandpermeabilityofthecoal.Amongmicrocomponentsofcoalrocks,vitriniteisfavorabletoforminationofcleat,whichcanenhancethepermeabilityofthecoal.Themorethevitriniteinthecoal,thehighertheporosityandpermeability.Thecontentofvitriniteandasharedifferentindifferenttypesofcoals.Fromdullcoaltobrightcoal,vitrinitetendstoincrease,theashtendstodecrease,andtheporosityandpermeabilitytendtoincrease.Inthestudyarea,coalsweredepositedintidalflatsanddeltaenvironments.Duetodifferenceinashcontentandmicrocomponents,coalsformedintidalflatsshowhigherporosityandpermeabilitythanthoseformedindeltas,andthoseformedinlowerdeltaplainshowhigherporosityandpermeabilitythanthoseformedinupperdeltaplain.Inaddition,duetodissolutionofthecalcitecementfillingfissures,cleatsandpores,coalrocksinthevadoseandphreaticzonesshowbetterreservoirability,whiledeeplyburiedcoalbeds,duetocementationandcompaction,showpoorreservoirability.Keywords:Carboniferous;Permian;high2qualitycoalrocks;sedimentaryfacies;sealevelchange9231

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