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ID:36772562
大小:1.98 MB
页数:8页
时间:2019-05-15
《莺歌海盆地砂质块体搬运沉积及其天然气聚集》由会员上传分享,免费在线阅读,更多相关内容在行业资料-天天文库。
1、第38卷第2期石油察嚣沾届V0】.38.No.22016年3月PETROLEUMGEoLoGY&EXPERIMENTMar.,2016文章编号:1001-6112(2016)02—0189—08doi:10.11781/sysydz201602189莺歌海盆地砂质块体搬运沉积及其天然气聚集张迎朝,王立锋,李绪深,钟泽红,詹冶萍,徐涛(中海石油(中国)有限公司湛江分公司,广东湛江524057)摘要:通过莺歌海盆地XF13区三维地震、钻井资料分析,新识别出上中新统黄流组一段砂质块体搬运沉积体系,进而研究其沉积模式及优质天然气聚集机制。钻井岩
2、心以砂质碎屑流沉积为主,发育块状层理、平行层理、突变接触面、泥岩撕裂和变形层等重力流沉积构造;地震资料上其与围岩差异显著,呈“削截”接触关系。砂质块体搬运沉积由多期构成.每期经历“早期侵蚀一充填迁移”和“晚期废弃”2个沉积阶段,相应发育近物源砂质碎屑流、块状厚层砂岩朵叶体和远物源泥质浊流、席状砂的沉积构型。构建了外陆架、海侵一高位体系域砂质块体搬运沉积新模式。以XF13大气田为例,从砂质块体搬运沉积、构造~岩性圈闭的形成到输导体系和天然气成藏过程分析,探讨了优质天然气聚集机制,认为莺歌海盆地中深部具备形成“优质储集体、高烃类气”天然气聚
3、集的地质条件。关键词:沉积构型;砂质块体搬运沉积;沉积模式;天然气聚集;上中新统;莺歌海盆地中图分类号:TEl22.2文献标识码:ASandymasstransportdepositmodelanditsnaturalgasaccumulationintheYinggehaiBasinZhangYingzhao,WangLifeng,LiXushen,ZhongZehong,ZhanYeping,XuTao(ZhanjiangBranchofCNOOCLtd.,Zhanjiang,Guangdong524057,China)Abstra
4、ct:Thesandymasstranspo~depositofthefirstmemberoftheHuangliuFormationintheUpperMiocenewasnewlyrecognizedusing3DseismicdataanddrillingdatacollectedfromtheXF13areaoftheYinggehaiBasin.Thedepositionalmodelandnaturalgasaccumulationmechanismhavebeeninvestigated.Coresrecordedsed
5、imentarycharacteristicsofsandymasstransportdepositverywell,developingmassivestratificationsandparallelstratifications,abruptcontactsurfaces,mudstoneavulsions,anddeformationlayers.Thesandymasstransportdeposithaddistinctseismicreflectionfeaturescomparedwiththoseofsurroundi
6、ngrocks.Theyconsistedofmultipleperiodsofsedimentation,andeachperiodexperiencedearlyerosion,filling,migrationandalateabandonmentstage.Theydevelopedadouble—layersedimentaryarchitecture,whichconsistedofmassivethickcompoundlobesandbodyandsheetysandbody,respectively.Eachperio
7、dofsandymasstransportdepositdevelopedsandydebrisflowmassivethicksandstoneswithslide—slumpmovementnearprovenance.andmuddvturbiditvcurrentdepositslaterallyfarfromthesource.Anewmodelwithatransgressive.highstandsystemstractandoutercontinentenvironmentwasproposed.AcasestudyWa
8、smadeintheXF13gasfield.Throughtheintegratedanalyrsesofsandymasstransportdeposit,structural—lithological
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