资源描述：
《吴起油田油沟油区长42b5油层组储层特征与油气富集规律分析》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、摘要本论文采用了综合对比的研究方法，结合岩心分析、测井、试油等资料，对吴起油田油沟油区长4+5油层组地层特征、构造特征、沉积特征、储层特征、油藏特征以及油藏富集规律等进行了较系统的研究。主要成果及认识如下：1.吴起油田油沟油区总体构造面貌为—西倾单斜，局部主要发育低幅的鼻隆构造，对石油富集具有控制作用。油沟油区长4+5油层组属于河控型湖泊相三角洲前缘亚相，主要发育水下分流河道和分流间湾微相，砂体发育程度中等，三角洲前缘亚相水下分流河道微相发育在两个区域内，物源方向为北东向。2.研究区长4+5油层组岩石类型为中-细粒长石岩屑砂岩，磨圆度以次棱角状为主，
2、分选较好（好-中）；接触关系以点-线状为主，胶结类型以孔隙-薄膜为主，成分成熟度偏低，结构成熟度中等。以长庆油田的分类标准进行评价，油沟油区长4+5油层组评价为小孔细喉型（III类）储层。3.研究区长4+5油层组油藏的分布受生油中心、生储盖有利配置、有利储集相、鼻状隆起及断裂和相关裂缝的影响。影响油藏成藏的控制因素主要有古地貌、沉积环境21以及低幅鼻状隆起等因素。纵向上分布规律为长4+52含油性最好,其次为长4+52,长4+51含油性最差。油藏类型主要为原油性质好（轻质低粘）、油藏埋深中浅、低孔隙度、低渗透率、低饱和度的弹性溶解气驱构造—岩性油藏。关
3、键词：鄂尔多斯盆地，油沟油区，长4+5，储层特征，油气富集规律iAbstractComprehensivecomparisionisusedinthispaper,combinedwithcoreanalysis,logging,oiltestingandsoon,inordertocarriedoutadetailedstudyandanalysisonsedimentaryfacies,reservoircharacteristics,reservoircharacteristicsandpotentialanalysisofChang4+5re
4、servoirofYougouareainWuqioilfield.Themainachievementsareasfollows:1.ThestructureofYougouareainWuqioilfieldisawest-dippingmonoclinic,whilelocallydevelopedlownoseupliftstructure，whichhasacontrollingroleingatheringoil.Chang4+5reservoirofYougouareainWuqioilfieldisistheriver-control
5、ledlacustrinedeltafront,whichdevelopunderwaterdiversionchannelanddiversionbaysedimentarymicrofacies.Thedevelopmentofsandbodyismedium.Theunderwaterdiversionchanneloflacustrinedeltafrontdevelopegintworegions,andthesourcedirectionisnorth-east.2.TherocktypesofChang4+5reservoirofreg
6、ionalisfine-grainedfeldspathiclithicsandstone,theroundnessissubangular,bettersorting,Thecontactrelationshipismainlypointlinear,lowmaturitycomposition,andmediumtexturematurity.Chang4+5reservoirofYougouareaisevaluatedasporesandfinethroat(IIItype)reservoirintheclassificationcriter
7、iaofChangqingOilfield.3.TheimpactofChang4+5reservoirdistributionbySourcecenter,rawreservoircapassemblageadvantageousarrangement,favorablereservoirfacies,nasalswelling,fractureandrelatedcracks.Thecontrollingfactorsoftheformationofoilreservoirsispalaeogeomorphology,sedimentaryenv
8、ironmentandlownoseupliftstructure,ect.The2distribution
