ISSN1008-9446CN13-1265/TE承德石油高等专科学校学报JournalofChengdePetroleumCollege第25卷第2期,2023年4月Vol.25,No.2,Apr.2023大牛地气田大70井区沉积特征研究冉辉(中国石化华北油气分公司勘探开发研究院,河南郑州450006)摘要:为精细刻画大牛地气田大70井区不同类型砂体的沉积特征及平面分布规律,通过15口取心井的系统岩心观察描述和岩样分析测试,利用钻井、测井、录井资料,开展密井网单井沉积储层特征分析,明确了大70井区主要沉积砂体的岩性特征和沉积相特征。研究认为:大70井区主要发育岩屑砂岩和岩屑石英砂岩,太原组发育石英砂岩;主要目的层沉积相包含3类大相和11类微相,其中,心滩、河道、分流河道和障壁砂坝为有利沉积微相,是下一步的勘探开发评价目标。关键词:大牛地气田;沉积微相;心滩;分流河道;障壁砂坝中图分类号:P618.13文献标志码:A文章编号:1008-9446(2023)02-0001-03SedimentaryCharacteristicsofDa70WellBlockinDaniudiGasfieldRANHui(ResearchInstituteofExplorationandDevelopment,SinopecNorthChinaOil&GasBranch,Zhengzhou450006,Henan,China)Abstract:InordertodefinethesedimentarycharacteristicsandplanedistributionofdifferenttypesofsandbodiesinDa70wellblockofDaniudiGasfield,systematiccoreobservationdescriptionandrocksampleanalysistestaredonein15coringwells.Combinedwithdrilling,testingandloggingdata,thelithologiccharacteristicsandsedimentaryfaciescharacteristicsofmainsedimentarysandbodiesinDa70wellblockarefurtherstudied.ThestudyshowsthatlithicsandstoneandlithicquartzsandstonearemainlydevelopedinDa70wellblock,andquartzsandstoneisdevelopedinTaiyuanFormation.Themainsedimentaryfaciesofthetargetlayerincludes3typesofmacrofaciesand11typesofmicrofacies.Amongthem,thefavorablemicrofaciesarediara,channel,distributarychannelandbarriersandbar,whicharethenextevaluationtargetsforfurtherexplorationanddevel-opment.Keywords:DaniudiGasfield;sedimentarymicrofacies;diara;distributarychannel;barriersandbar收稿日期:2022-02-15第一作者简介:冉辉(1990-),男,湖北安陆人,工程师,主要从事天然气开发研究工作,E-mail:582287363@qq.com。鄂尔多斯盆地北部在早古生代沉积之后遭受了长期剥蚀,中石炭世再次海侵,盆地北部发育滨浅海沉积。二叠纪山西期,盆地北部逐渐抬升,形成了...
