鄂尔多斯盆地坪庄上里塬地区长8储层成岩作用研究

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1、英文摘要Subject：DiagenesisoftheeighthreservoirunitofTriassicYanchangFormationinPingzhuang-Shanghyuanarea，OrdosBasinSpeciality：Name：‘Instructor：ABSTRACTTheeighthreservoirunitofTriassicYanchangFormation(C8)isoneofthemostimportantoil．．bearingsedsofstrateinPingzhuang··Shangliyuanarea,whichliesint

2、hesouthwestoftheOrdosbasin．Onthebasisofessentialandsubsidiraryindexbedsforstragraphiccorrelation,theeighthreservoirunitofTriassicYanchangFormationweredivisedintoC81andC82．C8depositedinthedeltaicfxontenvironments．Distributarychannelsareadvantagebeltsfordevelopmentofreservoirsandbodies．Base

3、donthetheoryandmethodofsedimentologyandthereservoirgeologythispaperdealswithlithologicfeatures，physicalcharacteristicsandporestructure，anddiagenesisanditsinfluenceonreservoirthroughthinsectionanalysis，SEM，X—rayandcathodeluminescencemethods．Thereservoirrocksmainlyconsitoflithicarkoseandfel

4、dspathiclitharenite，whicharecharacterized、航血highertexturalmaturityandlowercompositionalmaturity．Thediagenesisreservoirsandstonemainlyunderwentcomprisecompaction,pressolution,cementation，metasomatism，dissolutionandreplacement．Compactionandcementationreducedporosity．Dissolutionisbeneficialt

5、oimprovementofthereservior．Accordingtocomprehensiveanalysis，thedivisionofdiageneticstageandthediageneticevolutionaryseriesarestudied．MostreservoirrocksexperiencedstageAinthemiddlediagenesis，andasmallpartofreservoirrocksexperiencedstageBinthemiddlediagenesis．Thereservoirrocksalecharacteriz

6、edwit

7、llowporosityandultra-lowpermeability,becausethephysicalpropertyofreservoirisinfluencedbymicrofacies，diagenesisandtectonism．Reservoirrocksareclassifiedintofourtypes．Throughanalysisofdiagenesis，distributionofreservoirsand，reservoirproperty，oilproductivecapacityofreservoir，prospectivea

8、reasfor11ighqualityofreservoirareindicated．Keywords：Ordosbasin，Pingzhuang-Shangliyuanarea，TheeighthreservoirunitofTriassicYanehangFormation，diagenesis，reservoircharacteristicsThesistype：AppliedFundamentResearchIII学位论文创新性声明本人声明所呈交的学位论文是我个人在导师指导下进行的研究工作及取得的研究成果。尽我所知，除