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ID:37341592
大小:1.54 MB
页数:6页
时间:2019-05-22
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1、第36卷第3期石油察嚣沾届Vo1.36.No.32014年5月PETRoLEUMGEoLoGY&EXPEIUMENTMay,2014文章编号:1001-6112(2014)03-0310-06doi:10.11781/sysydz201403310昌图断陷石油地质特征及区带优选孙宜朴,陈霞,徐士林,赵洪伟(1.中国石化石油勘探开发研究院,北京100083;2.中国石化东北油气分公司,长春130000)摘要:通过对昌图断陷石油地质条件分析、构造单元划分及区带综合评价,认为昌图断陷主要发育白垩系,下白垩统为主要勘探目的层。九佛堂组暗色泥岩为主力烃源,主要分布在北部洼陷带,有
2、机质丰度高、Ⅱ,型干酪根,为成熟烃源岩;发育九佛堂组、沙海组、阜新组3套储层:九佛堂组储层存在南、北2个发育区,为Ⅱ类储层。存在九佛堂组和沙海组自生自储和以九佛堂组泥岩为烃源岩、沙海组砂岩为储层、阜新组下部泥岩为盖层构成的生储盖组合。中央构造带濒临生烃洼陷,长期处于油气运移指向区,圈闭发育,是有利的勘探区带。关键词:有利区带;九佛堂组;白垩系;昌图断陷;昌图一铁法盆地中图分类号:TEl22文献标识码:APetroleumgeologiccharacteristicsandprofitableexplorationzoneselectionofChangtuSagSunY
3、ibu,ChenXia,XuShilin,ZhaoHongwei(1.PetroleumExplorationandProductionResearchInstitute,SINOPEC,Bering100083,China;2.SINOPECNortheasternOilfieldCompany,Changchun,Jilin130000,China)Abstract:Thestudiesofpetroleumgeologiccharacteristics,structuralunitdivisionandprofitableexplorationzoneselect
4、ionoftheChangtuSagshowedthatCretaceouswaswelldevelopedinthestudyarea,andtheLowerCretaceouswasamainexplorationtarget.ThedarkmudstonesoftheJiufotangFormation,withhighorganiccar—bonabundance,type112kerogenandinmaturestage,servedasthemainsourcerocksandmainlydevelopedinthenorthofthesag.Therew
5、ere3setsofreservoirsincludingtheJiufotang,ShahaiandFuxinFormations.TheJiu—fotangreservoirsdevelopedinthenorthandthesouth.andbelongedtotypeⅡ.2kindsofpetroleumsystemswereconcluded.Astothe1stkind,hydrocarbongeneratedandself-storedintheJiufotangandShahaiForma—tions.Whileforthe2ndkind,hydroca
6、rbongeneratedfromthemudstonesintheJiufotangFormation,storedinthesandstonesintheShahaiFormation,andcappedbythemudstonesinthelowerpartoftheFuxinFormation.TheCentralStructuralZone,whichwasadjacenttohydrocarbongenerationsagandhadmanytraps,wasthetar—getforhydrocarbonmigrationforalongtime,henc
7、ewasafavorablepetroleumexplorationzone.Keywords:profitableexplorationzone;JiufotangFormation;Cretaceous;ChangtuSag;Changtu—TiefaBasin1地质概况约2500km,基底最大埋深可达650om(图)。2石油地质特征昌图断陷是昌图一铁法盆地内的一个面积最大的断陷。该断陷位于辽宁省北部昌图县和吉林2.1地层特征省南部双辽县,东邻大黑山南端,西与三家子断陷昌图断陷内白垩系沉积地层齐全.包括了上白相邻。向北止于省界:是在古
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