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ID:36780726
大小:1.67 MB
页数:7页
时间:2019-05-15
《箕状断陷湖盆湖底扇特征及油气勘探-以二连盆地赛汉塔拉凹陷腾格尔组二段为例》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、石油勘探与开发PETROLEUMEXPLORAT10NANDDEVELOPMENTVol
2、37No.1632010年2月文章编号:1000—0747(2010)01—0063—07箕状断陷湖盆湖底扇特征及油气勘探以二连盆地赛汉塔拉凹陷腾格尔组二段为例陈广坡,王天奇,李林波,李书民,李娟(1.中国石油勘探开发研究院西北分院;2.中国石油华北油田公司勘探部)基金项目:中国石油低渗透油田开发科技攻关项目(ktt]一050120—8)摘要:以二连盆地赛汉塔拉凹陷为例,通过对腾格尔组二段湖底扇砂岩体的岩石学、结构、构造等特征的分析,认为赛汉塔拉凹陷湖底扇比较发育,具有典型浊流沉积所形成
3、的鲍马序列以及非典型浊积岩“AAA”、“ABABAB”序等沉积特征,在沉积结构上具有典型浊流沉积的粒度分布特征,并具有丰富的浊流沉积构造现象。湖底扇主要发育在凹陷缓坡带扇三角洲前缘同沉积断裂形成的断裂坡折带下部,以及陡坡带控盆边界断裂下降盘的近岸水下扇沉积前端的洼槽区。湖底扇的形成与同沉积断裂的长期活动密切相关,规模大小受断裂活动、古地貌坡度、物源供应等因素控制。湖底扇砂岩体具有毗邻烃源岩,易形成岩性圈闭,油气运移和聚集条件好等优越条件,对油气勘探具有重要的意义。图9参14关键词:箕状断陷湖盆;湖底扇;沉积特征;沉积模式;油气勘探;赛汉塔拉凹陷中图分类号:TEl22.1文献标
4、识码:ACharacteristicsofsublacustrinefaninhalf-grabenriftlakebasinanditspetroleumprospecting:CasestudyonthesecondmemberofTenggeerFormation,SaihantalaSag,ErlianBasinChenGuangpo。WangTianqi,LiLinbo,LiShumin,LiJuan(1.NorthzaestBranch,PetroChinaResearchInstituteofPetroleumExploration&Development,La
5、nzhou730020,China;2.ExplorationDept.ofPetroChinaHuabeiOilfieldCompany,Renqiu062552,China)Abstract:Analysisismadeonpetrology,textureandstructureofsublacustrinefansandbodiesinthesecondmemberofTenggeerFormation.Thesublacustrinefandevelopswell,anditischaracterizedbytheBoumasequenceresultedfromt
6、ypicalturbiditedepositandtheAAAandABABABsequencesofnon-typicalturbidite.Fordepositionaltexture,itfeaturesgraindistributionoftypicalturbiditedepositandcontainsabundantturbiditedepositstructures.Thesublacustrinefanmainlydevelopsinthelowerpartofthefaultslopebreakformedbysynsedimentaryfaultingi
7、nthefandeltafrontofgentleslopeinthesagandinthetroughsinfrontofoffshoresubseafandepositinthedown-throwoffaultsatboundaryofthebasincontrolledbyabruptslope.Theformingofthesublacustrinefaniscloselyrelatedtothelongperiodsynsedimentaryfaultingactivities,andthescaleiscontrolledbythefaultactivity,s
8、lopegradientofpalaeogeomorphologyandthesupplyofdeposit.ThesublacustrinefansandbodiesareadjacenttOsourcerocks,theyareeasytoformlitholohictrapsandfavorableforpetroleummigrationandaccumulation,whichissignificantforthepetroleumprospecting.Keywords:half-grabe
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