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ID:37405028
大小:2.28 MB
页数:9页
时间:2019-05-23
《渤海海域蓬莱91花岗岩潜山大型油气田储层发育特征与主控因素》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、学兔兔www.xuetutu.com天然气北第36卷第2期OIL&GASGE0L0GY2015年4月文章编号:0253—9985(2015)02—0262—09doi:10.11743/ogg20150211渤海海域蓬莱9—1花岗岩潜山大型油气田储层发育特征与主控因素王昕,周心怀,徐国胜,刘朋波,高坤顺,官大勇[1.中海石油(中国)有限公司天津分公司,天津3130452;2.成都理工大学油气藏地质及开发工程国家重点实验室,四川成都610059]摘要:蓬莱9—1油田是近年来中国近海首次发现的一个以中生代花岗岩潜山风化壳为储层的大型油气田。在花岗岩潜山这个新的勘探领域,储层特征及储层形成机理条件
2、是制约高效勘探的关键。通过镜下薄片鉴定、扫描电镜分析、矿物x一衍射分析、岩心与岩屑录井、测井曲线等资料综合分析,认为由表及里随着风化淋滤作用的逐渐减弱,蓬莱9—1花岗岩潜山可以划分为土壤带、砂一砾质风化带、裂缝带和基岩带,储集空间由孔隙型一裂缝一孔隙型一孔隙一裂缝型一裂缝型呈现有规律的变化。花岗岩潜山储层发育主要受表生岩溶作用、有机酸溶蚀作用、构造变形作用及微古地貌作用共同控制。这个认识对中国燕山期侵入的花岗岩潜山风化壳油气勘探开发具有借鉴意义。关键词:风化壳;花岗岩潜山;燕山期;蓬莱9—1油田;渤海海域中图分类号:TE122.2文献标识码:ACharacteristicsandcontro
3、llingfactorsofreservoirsinPenglai9-1large·scaleoilfieldinburiedgranitehills,BohaiSeaWangXin,ZhouXinhuai,XuGuosheng,LiuPengbo,GaoKunshun,GuanDayong(1.TianjinBranch,CNOOC,Tianjin300452,China;2.StateKeyLaboratoryofOilandGasReservoirGeologyandExploitationEngineering,ChengduUniversityTechnology,Chengdu,
4、Sichuan610059,China)Abstract:Penglai9-1oilfieldhasbeenthefirstlarge.scalefieldfoundinweatheringcrustreservoirsoftheMesozoicbu—tiedgranitehillsincoastwatersofChinainrecentyears.Inthisbrandnewareaofexploration.reservoircharacterizationanditsformingmechanismareconsideredessentialforefficientandsuccess
5、fulexploration.Thinsection.SEM.andclavmineralX-diffractionanalyseswerecombinedwithloggingdatatoprovideinsightintouncertaintiesofthearea.There—suhsshowthattheburiedgranitehillscanbedividedintosoilzone,sand.conglomerateweatheringzonefracturezoneand,baserockzone,andreservoiringspaceinthemchangesinareg
6、ularpatternfromporetofracture-porepore—fractureand,fracture,fromthesurfacetothecenterasweatheringandleachinggraduallyweaken.Horizontally,granitereservoirsarecontinuouslyandwidelydistributedandparalleledtothetoDoftheburiedhills.Thickerreservoirsaremainlydevelopednearlarge‘scalefaultswithintensiveact
7、ivitiesandpaleogeomorphicslopeareas.Thepaperproposesthatthereservoirswerecontrolledmainlybyepigenickarstification,organicaciddissolution,structuraldeformationandmicro.palaeogeomor.phology.Thesignificanceoft
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