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第12卷第6期2010年12月古地理学报JOURNALOFPALAEOGEOGRAPHYVol12No6Dec.2010:1671-1505(2010)06-0737-11邓宏文高晓鹏赵宁颜晖邸永香张培园中国地质大学(北京)能源学院,北京100083湖相滩坝砂体作为油气重要储集体类型之一,在中国东部渤海湾盆地古近系断陷湖盆中广泛发育,其形成发育与盆地特定的演化阶段和构造地貌背景密切相关文章以济阳坳陷北部为例,根据盆地结构与地貌背景将断陷湖盆滩坝分为开阔湖盆缓坡型滩坝水下潜山台地型滩坝和潜山凸起周缘型滩坝3种成因模式不同构造地貌背景下的滩坝砂体沉积特征与分布规律不同,由此导致隐蔽圈闭类型与成藏特征成藏潜力与有利勘探区带的差异性开阔湖盆缓坡型滩坝规模相对较大,物性较好,主要隐蔽圈闭类型为地层超覆圈闭和岩性圈闭,成藏潜力大;水下潜山台地型滩坝发育不整合遮挡圈闭地层超覆圈闭和岩性圈闭;潜山凸起周缘型滩坝可以形成陆源碎屑与碳酸盐碎屑滩坝2种成因类型,主要隐蔽圈闭类型为地层超覆圈闭和岩性圈闭,成藏潜力相对较小济阳坳陷滩坝成因类型分布规律成因模式成藏特征邓宏文,女,1946年生,博士,现为中国地质大学(北京)教授,主要从事油气地质沉积学和层序地层学方面的研究与教学工作Email:dhwen@vipsinacom:P51232:A:2010-06-23:2010-07-27Genetictypes,distributionpatternsandhydrocarbonaccumulationinterrigenousbeachandbarinnorthernfaultedlacustrinebasinofJiyangDepressionDengHongwenGaoXiaopengZhaoNingYanHuiDiYongxiangZhangPeiyuanSchoolofEnergy,ChinaUniversityofGeosciences(Beijing),Beijing100083AbstractAsoneoftheimportantreservoirtypes,lacustrinebeachandbarsandbodiesarewidespreadinthePaleogeneofBohaiBayBasin,EastChina.Theformationanddistributionofbeachesandbarsarecloselyrelatedtotheparticularstructuralevolutionstageandthegeomorphicsettingofthebasin.Basedonthebasinstructureandpaleogeomorphologicbackground,beachesandbarsinnorthernJiyangDepressionarecategorizedintothreegeneticmodels,ie.thoseonopengentleslope;thoseonsubaqueousburialhillandthoseontheperipheryofburiedhilluplif.tThesethreetypesofbeachesandbarsareofdifferentdepositionalcharacteranddistributionpattern,whichleadtothedifferencesinsubtletraptypes,hydrocarbonaccumulationfeaturesandpotentia.lTheopengentleslopebeachesandbarsareofrelativelylargescaleandbetterphysicalproperties,withstratigraphicoverlaptrapsandlithologictrapsasthemain古地理学报2010年12月subtletrapswhichhavebetteroilgasexplorationpotentia.lTheburialplatformbeachesandbarsdevelopedunconformitysealed,stratigraphicoverlaptrapsandlithologictraps.Thebeachesandbarsontheperipheryofaburialupliftcanbesubdividedintotwogenetictypes,ie.,terrigenousoriginandcarbonateorigin,withsubtletrapsmainlyofstratigraphicoverlapandlithologictypes.KeywordsJiyangDepression,genetictypesofbeachandbar,distributionpattern,geneticmodels,hydrocarbonaccumulationcharacteristicAboutthefirstauthorDengHongwen,bornin1946,isaprofessorandPhD.candidatesuperviserofChinaUniversityofGeosciences(Beijing).Herresearchinterestingissedimentologyandsequencestratigraphy.,,(,1994;,1998;,2000;,2001;,2004;,2008;,2010),,,,,,,1,()(),,,,,,,,(),,,,,,,,,,;,,,,,,3,221211(1),,,,,,,738126:1()()Fig1StructurallocationofDawangbeisubsag,ChenzhenSag(left)andbasinarchitecture(right)T2T3(,2008),,,(1)20~450m,,350~400m,,,,(,2008)212()(),,()(A/S),(),(),()()(Selley,2000;,2005)(),,(PicardandHigh,1968;JimBorer,2003),,,,(,2003,2008),,,,!∀(2),,,,,#∃,!∀(3)(),,;#∃,,∀,,,,,,1739古地理学报2010年12月2Fig2SedimentaryfaciescorrelationsectionoftheMember2ofShahejieFormationinDawangbeisubsag#∃#∃,(4)(,2008),,,,(,2008),#∃,#∃,;,#∃,,,#∃(4)22221;,,,,(5-A),,,,,,,,,,,,120~220m,410m,,,(5-B)222,,,,,,740126:741古地理学报2010年12月4(,2008)Fig4DepositionalmodelofbeachandbaronopengentleslopeoftheMember2ofShahejieFormationinDawangbeisubsag(afterDengHongwenetal.,2008)5(A)(B)Fig5StuctureofthebottomintheupperpartofMember4ofShahejieFormationinZhuangxiarea(A)andarchitecture(B)ofZhanhuaSag,,,,,,(6),,,,,,,,(7)23231(5),,,,,,742126:6Fig6SedimentaryfaciescorrelationsectionoftheupperpartofMember4ofShahejieFormationinZhuangxiarea7Fig7DepositionalmodelofbeachandbarofsubaqueousburialhillplatformoftheupperpartofMember4ofShahejieFormationinZhuangxiarea,,,20~35m,95m,(8-A)232,,,(8-B),,,,#∃,,,,,,,,,#∃,,,,,#∃,,(9)3,743古地理学报2010年12月744126:,31,,,,1(1),,5~10m;,,,,,16%~22%,15%10-3~70%10-3m2,,,,3(10),3,,3,1;,,,;,,,,,1,,90,,,,,,,,10Fig10Divisionofsourcerock,reservoirandsealassemblageintheupperpartofMember2ofShahejieFormationinDawangbeisubsag(11-A)32,,,,,745古地理学报2010年12月113Fig11Subtletrapsofthreedifferentgenetictypesofbeachandbarinfaultingbasin,,,(T6),,,,,,,,,,∀&,,,,2~3m,8%~14%,1%10-3~4%10-3m2,,∀&,(11-B),(,2005),:;,;33,,,,,,,,,,,,,2~4m,13%,60%10-3m2;,,12%;30%10-3m2,,,746126:,T2(),,(11-C),,,,3,,,,,,,,41)3,2),;,;3)3,,,,,.2000.[J].,28(3):1-3.,,,.2008.[J].,26(5):715-724.,,,.2003.[M].:.,,,.2005.24[J].,26(2):30-37.,,.2001.[J].,8(3):21-24.,,,.2004.[J].,26(2):23-25..2005.[J].,12(4):46-48.,,.2010.2[J].,12(1):57-68.,,,.1998.[J].,19(4):351-355.,,.1994.[J].,12(2):20-27.JamesM,Borer.2003.HighresolutionstratigraphyoftheGreenRiverFormationatRavenRidgeandRedWashField,NEUintaBasin:Faciesandstratigraphicpatterninahighgradienthighenergylacustrinesystem[J].AAPGAnnualConventionFieldTrip#4.PicardMD,HighLR.1968.SedimentarycyclesintheGreenRiverFormation(Eocene)UintaBasinmYtah[J].JournalofSedimentaryPetrology,38(2):378-383.RichardC,Selley2000.AppliedSedementology(SecondEdition)Copyright[C].AcademicPress,234-237.()747