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1、第29卷第1期OIL&GASGEOLOGY2008年2月文章编号:0253-9985(2008)01-0078-06车排子地区构造-古地貌特征及其控砂机制1233邢凤存,陆永潮,刘传虎,向奎(11中国地质大学能源学院,北京100083;21中国地质大学资源学院,湖北武汉430074;31中国石油化工股份有限公司胜利油田有限公司新疆石油勘探开发分公司,新疆乌鲁木齐830000)摘要:利用地震、测井及测试资料,采用回剥技术及剥蚀量的趋势分析方法,恢复了准噶尔盆地车排子地区下白垩统吐谷鲁群层序低位体系
2、域、古近系层序低位体系域及新近系中新统沙湾组层序湖扩体系域的底界面同沉积期古地貌。并分析了3个时期古地貌特征及其对下切谷砂砾岩体、扇三角洲砂砾岩体及滩坝砂体的控制作用。在此基础上,总结了3个时期地貌控砂模式,认为吐谷鲁层序低位期具隆起区供砂,低隆起区和/梁0分砂,沟谷输砂,凹陷聚砂的特点;古近系层序低位期古地貌控砂机制与吐谷鲁层序低位期的相似,但沟谷输砂特点不明显;沙湾组层序湖扩期具坡折带控砂和低隆起区控砂的特点。关键词:控砂机制;古地貌;车排子地区;准噶尔盆地中图分类号:TE121.3文献标识
3、码:AStructura-lpaleogeomorphologicfeaturesofChepaiziareaandmechanismoftheircontrolonsandbodies1233XingFengcun,LuYongchao,LiuChuanhu,XiangKui(11SchoolofEnergyResources,ChinaUniversityofGeosciences,Beijing100083,China;21SchoolofEarthResources,ChinaUnive
4、rsityofGeosciences,Wuhan,Hubei430074,China;31XinjiangCompanyofPetroleumExplorationandDevelopment,ShengliOilfieldCompanyLtd.,SINOPEC,Urumqi,Xinjiang830000,China)Abstract:Seismic,log,andtestdataaswellasthebackstrippingtechniqueandtrendanalysismethodofe
5、rosionrestoration,wereemployedinthesynsedimentarypalaeogeomorphologyreconstructionofbasalboundariesofthelowstandsystemtracts(LST)oftheLowerCretaceousTuguluGroupsequence,theLSTofthePaleogenesequenceandthelacustrineexpandingsystemtractoftheMioceneShawa
6、nFormationsequenceintheChepaiziarea,Junggarbasin.Thepaleogeomorphologicfeaturesofthesethreestagesandtheircontrolongluteniteinincisedvalley,fandeltaicgluteniteandlongshoresandbodywereanalyzed.Basedontheresultsofthesestudies,thispapersummar-izesthecont
7、rollingpatternsofthegeomorphologyonsandbodydistributionsduringthesethreestages.TheLSToftheTuguluGroupsequenceischaracterizedbysandsupplyfromtheuplif,tdiversionofthelowupliftand/ridge0,transportationalongthevalley,andaccumulationinthesag.TheLSTofthePa
8、leogenesequencesharesthesimilarfeatureswiththeTuguluGroupsequenceexceptfortheinsignificantfeatureoftransportationalongthevalley,whilethelacustrineexpandingsystemtractoftheMioceneShawanFormationfeaturesincontrolofslope-breakzoneandlowupliftzoneontrans
