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ID:52272659
大小:1.42 MB
页数:9页
时间:2020-03-26
《陕北富县地区直罗油田上三叠统延长组长6储层成岩作用与有利成岩相带.pdf》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32卷第5期地质通报Vo1.32.NO.52013年5月GEoL0GICALBULLETINOFCHINAMaV.2013陕成匕北u岩—富作县地区直罗油田上三叠统延长组长6储层用与有利成岩相带白薷,张金功,李渭,孙兵华。,朱富强BAIRu,ZHANGJin—gong,LIWei。,SUNBing—hua。,ZHUFu—qiang1.西北大学大陆动力学国家重点实验室西北大学地质学系,陕西西安710069:2.中国地质调查局西安地质调查中心.陕西西安710054:3.延长石油研究院.陕西西安710075:4.延长石油直罗采油厂,陕西延安7275001.NationalKeyLaborato
2、ryofContinentalDynamics,DepartmentofGeology,NorthwestUniversity,Xi"an710069,Shaanxi,China,.2.x,肌CenterofGeologicalSurvey,ChinaGeologicdSurvey,Xi'an710054,Shaanxi,China;3.ResearchIr~tituteofYangchangPetroleum,Xi'an71O075,Shaanxi,China,"4.ZhiluoOilProductionofYangchangPetroleum,Yanan727500,Shaanxi,
3、China摘要:根据物性分析、高压压汞、薄片观察、扫描电镜及x衍射资料,以及陕北直罗油田长6储层的成岩作用特征,认为该区长6储层处于晚成岩A期阶段。强烈的压实及胶结作用破坏了砂岩的原生孔隙结构,其中碳酸盐、硅质和粘土矿物胶结物是造成砂岩物性降低的重要原因,碎屑颗粒周围形成的绿泥石衬边阻止了部分石英、长石次生加大及碳酸盐胶结物的沉淀,使部分原生粒间孔隙得以保存。溶蚀作用形成次生孔隙,使储层物性得到一定程度的改善。研究区长6储层发育4种成岩相,优质储层与成岩相关系密切,其中次生孔隙成岩相物性最好,绿泥石膜相次之,它们成为储层发育的有利成岩相带。关键词:直罗油田;长6储层:成岩作用;成岩相带中
4、图分类号:P534.51文献标志码:A文章编号:1671—2552—2013(05)一0790—09BaiR,ZhangJG,LiW,SunBH,ZhuFQ.DiagenesisandfavorablediageneticfaciesofChang6ReservoirintheZhiluoOilfield,northernShaanxi.GeologicalBulletinofChina,2013,32(5):790-798Abstract:AccordingtOphysicalpropertyanalysis,mercuryinjection,castsectionSEMandx—ra
5、ydifractions,theauthorsstudiedthediageneticfeaturesofChang6reservoirintheZhiluooilfieldofnorthernShaanxi,andhavereachedtheconclusionthatChang6reservoirbelongstOthe”A”stageoflatediagenesis.Theimpactandconsolidatedfillinghavedestroyedtheporosityofthesandstones.Carbonate,hydrosyaliteandquartz—feldsp
6、arovergrowthswerethemaincementsthatreducedthereservoirqualityofthesandstones.Thinchloritefilmarounddetrit~grainspreventedovergrowthofpartofquartzandfeldsparandprecipitationofcarbonatecements,thuspreservingapartofprimarypores.Dissolutionproducedsecondaryporesandimprovedthephysicalproperty.Fourkind
7、sofdia—geneticfacieswererecognizedinthestudyarea.Thereexistsintimaterelationshipbetweenqu~ifiedreservoirsanddiageneticfacies:thephysicalpropertiesofsecondaryporediageneticfaciesarethebest,followedbychloritecementationf
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