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ID:55785425
大小:1.15 MB
页数:9页
时间:2020-06-01
《鄂尔多斯盆地陇东地区延长组低渗透储层孔隙结构分类研究.pdf》由会员上传分享,免费在线阅读,更多相关内容在应用文档-天天文库。
1、第2O卷第2期EarthScienceFron地tie学rs前(C缘hin(a中U国niv地ers质ity大o学fG(e北osc京1en)c;es北(B京eij大ing学);)PekingUniversity)Vol_2ONo.22013年3月Mar.2O13鄂尔多斯盆地陇东地区延长组低渗透储层孑L隙结构分类研究冉新权,吴胜和,付晶,魏新善,楚美娟1.巾国石油长庆油田分公司,陕西两安7100182.中国石油大学(JL京)地球科学学院,北京102249RANXinquan,WUShenghe。,FUJing,WEI
2、Xinshan,CHUMeijuan1.PetroCkinaChangqing(~ljieldCompany,Xi710018,China2.CollegeOfGeoseiences,ChinaUniversityf)fPetroleum(Beijing),Beijing102249,ChinaRANXinquan,Ⅵr【JShenghe,FUJing,eta1.ResearchontheporestructureclassificationoflowpermeabilityreservioroftheYanch
3、angFormationinLongdongArea,OrdosBasin.EarthScienceFrontiers,2013,20(2):077-085Abstract:Usingthedatasuchascastthinsection,scanningelectronmicroscopeandmercury-injection,thepresentpaperinvestigatestheporestructureclassificationstandardsoflowpermeabilityreservoi
4、roftheYanchangFormationinI.ongdongArea,()rdosBasin.Thecorrelationanalysisamongcharacteristicparametersofmicroscopicporestructureandmacroscopicphysicalpropertiesshowsthatthemaximumconnectedpore—throatradiushasthebestcorrelativitywithpermeabilityandactsasthefav
5、orableparameterforthroatgrading;usingmethodofdataconfiguration,thepaperdeterminesthethroatgradingboundariesandestablishesthegradingstandardsofreservoirporesandthroats.ThereservoirporestructureoftheYanchangFormationcouldbeclassifiedintosixtypesincludingbig—mid
6、porecoarsethroattype,midsmallporemidthroattype,mid—smallporefinethroattype,smallporemicro—finethroattype,fine-microporemicrofinethroattype,andfine-microporemicrothroattype.Reservoircouldhavedifferentphysicalpropertiesandliquidproductioncapacityaccordingtoitsp
7、orestructuretype.Keywords:lowpermeabilityreservoir;microscopicporestructure;classifiedevaluation;YanchangFormationofI.ongdongArea摘要:运用铸体薄片、扫描电镜与常规压汞等资料,对陇东地区延长组低渗透储层孔隙结构分类标准进行了研究。不同孔隙结构特征参数与宏观物性参数的相关分析表明,最大连通喉道半径与渗透率的相关关系最好,为喉道分级的最优参数;运用数据构形的方法确定出了喉道分级界限,建立了储
8、层孔隙、喉道分级标准。综合孔隙与喉道大小的组合及储层孔喉的其他特征,将延长组储层砂岩的孔隙结构划分为六种类型:大一中孔粗喉型、中一小孔中喉型、中一小孔细喉型、小孔微细喉型、细一微孔微细喉型和细一微孔微喉型。不同孔隙结构类型的储层具有不同的物性特征及不同的产液能力。关键词:低渗透砂岩储层;微观孔隙结构;分类评价;陇东地区延长组中图分类号:TE122文献标志码:A文章编号:1
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