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1、學(xué)兔兔www.xuetutu.com名沾專天然氣北力第30卷第4期0IL&GASGEOLOGY2009年8月文章編號(hào):0253—9985(2009)04—0431—07遼東灣坳陷古近系東營(yíng)組泥巖對(duì)油氣藏分布的控制作用’。。。一徐長(zhǎng)貴??王海軍,朱秀香,史翠娥,[1.中海石油(中國(guó))有限公司天津分公司,天津300452;2.中國(guó)石油大學(xué)盆地與油藏研究中心,北京1022493.中國(guó)石油大學(xué)油氣成藏機(jī)理教育部重點(diǎn)實(shí)驗(yàn)室,北京102249]摘要:遼東灣坳陷位于渤海灣盆地東北部,油氣聚集層位從北向南逐漸變新,北部和中部大部分油氣藏都分布于古近系東“北厚南薄”的東營(yíng)組泥巖有著密切的關(guān)
2、系營(yíng)組和沙河街組地層中,油氣藏的這種分布特點(diǎn)與坳陷中。結(jié)合遼東灣坳陷構(gòu)造特征、沉積體系演化及地層發(fā)育特點(diǎn),通過(guò)對(duì)東營(yíng)組泥巖產(chǎn)生的超壓,及泥巖和砂體、斷層、不整合面等疏導(dǎo)體系的配置的研究,探討了遼東灣坳陷東營(yíng)組泥巖對(duì)油氣藏分布的控制作用。東營(yíng)組泥巖與斷層、油源、砂體等多種因素聯(lián)合通過(guò)5種作用控制了坳陷內(nèi)油氣藏的分布。其中巨厚泥巖產(chǎn)生的超壓對(duì)北部和中部油氣藏的控制作用最為明顯,油氣藏主要分布于東營(yíng)組及下伏地層中。關(guān)鍵詞:超壓體系;泥巖蓋層;油氣藏;東營(yíng)組;遼東灣坳陷;渤海灣盆地中圖分類(lèi)號(hào):TEll2.3文獻(xiàn)標(biāo)識(shí)碼:AControloftheDongyingFormationm
3、udstoneuponthedistributionofhydrocarbonaccumulationsintheLiaodongBayDepression。。?’。一?!?。XuChangguiZhuXiuxiangShiCuieWangHaiun,,,j(1.CNOOCTianjinCompany,Tianjin300452,China;2.ResearchCenterforBasinsandReservoirs,ChinaUniversityofPetroleum,Bering102249,China;3.KeyLaboratoryforHydrocarbonAccu
4、mulationMechanism,MinistryofEducation,ChinaUniversityofPetroleum,Bering102249,China)Basin—Abstract:TheLiaodongBaydepressionislocatedinnortheasternBohaiBay.Hydrocarbonbearinglayersinthedepressionpresentatrendofbecomingyoungerfromnorthtosouth.Mosthydrocarbonaccumulationsin-thenorthernandcen
5、tralDartsofthedepressionaredistributedintheDongyingandShah~ieformationsapat—terncloselyrelatedwiththenludstone(thickerinthenorthandthinnerinthesouth)intheDongyingForma—tionevolutionofdeositionalsstemsandformationdevelomentintheLia—.Consideringthestructuralfeatures,py,podongBaydepression,w
6、estudiedtheoverpressurecreatedbythemudstoneintheDongyingFormationandtheconfigurationsofthemudstonewithcartiersystemssuchassandbodies,faults,unconformities,anddiscussedthecontrollingeffectofthemudstoneonhydrocarbonaccumulationsintheLiaodongBaydepression.Theresultshowsthatthemudstone,togeth
7、erwithfaults,oilsourcesandsandbodies,controlthedistributionofoilandgasaccumulations.Ofthesefactors,theoverpressurecreatedbythethickmudstonehasastrongpresenceinaffectingthedistributionofaccumulationsinthenorthernandcentralpartsofthederessioncausinmostofthemoccur—p,gr