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时间:2020-03-26
《鄂尔多斯盆地姬塬西北部长91储层特征及主控因素研究.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、Vol
2、23。No.2第23卷第2期中国矿业2014年2月CHINAMININGMAGAZINEFeb.2014地覆拽对鄂尔多斯盆地姬塬西北部长91储层特征及主控因素研究熊斌,陈洪德,赵俊兴,李凤杰,向芳,陈安清(1.成都理工大学沉积地质研究院,四川成都610059;“油气藏地质及开发工程”国家重点实验室,四川成都61O059)摘要:本文以姬塬油田西北部长9。储集岩为研究对象,基于岩心及镜下薄片观察,测井资料分析等手段,通过岩石学特征,孑L隙类型,物性特征等方面对储层进行研究,分析其储集特征、主控因素并对其评价。结果表
3、明:姬塬西北部长9储集岩主要孔隙类型为剩余原生粒间孑L、粒间及粒内溶孔和黏土矿物微孑L;其平均孔隙度为9.95,平均渗透率为1.05mD,属低孔、低一特低渗储层。储层展布及物性主要受沉积环境及成岩作用的影响,分流河道是储层发育最有利相带;压实和胶结作用降低了储层物性,但绿泥石环边胶结对原生粒间孔隙起到保护作用,而长石和浊沸石的溶蚀改善了储层的储集性能。根据沉积特征、物性特征、储集空间等要素划分出五类储层,沿分流河道中心分布的I类和Ⅱ类储层为有利区,分布于分流河道边部的Ⅲ、Ⅳ类储层为较有利区。关键词:储层特征;主控因素;
4、长9油层组;鄂尔多斯盆地中图分类号:TEl22.2文献标识码:A文章编号:1004—4051(2014)020067—08Characteristicsandmaincontrollingfactorsofchang-91oilreservoirinthenorthwestareaofJiyuanoilfield,OrdosbasinXIONGBin,CHENHong—de,ZHAOJun-xing,LIFeng—jie,XIANGFang,CHENAn-qing(1.ResearchInstituteofSedime
5、ntaryGeology,ChengduUniversityofTechnology,Chengdu610059,China;2.StateKeyLaboratoryofOilandGasReservoirGeologyandDevelopmentEngineering,Chengdu610059,China)Abstract:Basedontheobservationofcoresamples,thinsectionsandwelllogdataanalysismethod,throughthepetrography
6、,poretypesandreservoirphysicalpropertiesofthechang-91oilreservoirinthenorthwestareaofJiyuanoilfield,thisarticlediscussedreservoircharacteristics,themaincontrollingfactorsandtheevaluationofreservoirinthestudyarea.Theresearchdemonstratesthatthemaintypesoftheporesi
7、nthereservoirareresidualprimaryintergranularpores,intergranular-intragranulardissolvedporesandclaymineralsmicropores.Theaverageporosityandpermeabilityofthethechang-91oilreservoirisabout9.95and1.05mDrespectively,SOitisatypicalreservoirwithlowporosityandpermeabili
8、ty.Developmentofthereservoirsisobviouslycontrolledbysedimentaryevironmentanddiagenesis.Distributarychannelisthebestreservoirfacies,eventheporosityofthereservoirwasreducedbycompactionandcementation,buttherimcementationofchloriteprotectedtheprimaryintergranularpor
9、esavailably.Moreover,thecorrosionoffeldsparandlaumontitealsoimprovedtheperformanceofthereservoir.FivetypesofthereservoirhavebeendistinguishedaccordingtOtheresearchofi
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