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1、中文7700字FormationMechanismandDistributionofPaleogene-NeogeneStratigraphicReservoirsinJiyangDepressionAbstractDuringPaleogene-Neogeneperiod,multiplescaleunconformitieshadbeenformedinJiyangdepression,whichprovidedfavorableconditionsforstratigraphicreservoirs.Inrecentyears,variousPaleogene-Neogene
2、stratigraphicreservoirsinJiyangdepressionhavebeenfound,andprovedreserveswererisingsignificantly,whichfullyshowedagreatexplorationpotentialforthiskindofreservoirs.Butthepracticeofexplorationinrecentyearsindicatedthattheunconformitiescarriersystemanditsabilityofsealing,petroleummigrationanditsac
3、cumulationmodel,distributionofstratigraphicreservoirsareuncertain,whichdeeplyrestricttheexplorationdegreeofstratigraphicreservoirsinJiyangdepression．BasedontheanalysisofalargenumberofexplorationwellsandseismicdataforTypicalreservoirs,thepaperanalysesunconformitiesconstructanditseffecttogenerat
4、ioninthePaleogene—Neogene,andsummarizethedistributionpatternofstratigraphicreservoirsbasedonpetroleummechanismandaccumulationmodel.Finally,ahighlyquantitativepredictionmodclofheightofpoolsinstratigraphicreservoirswasestablished,theresearchresultseffectivelyguidedtheexplorationPra-cticeofstrati
5、graphicreservoir.TherearefourmacrounconformitytypesofPaleogene—Neogeneformationwhichincludingtruncation-overlap,truncation·parallel,parallel—overlapandparalelunconformityinJiyangdepression.Besidestruncation-overlapunconformityliesinslopesofdepression,andparallelunconformitydevelopedinsideofdep
6、ression,anothertwotypeslieinlocalareas.Unconformitycanbedevelopedverticallythree-layerstructurewhichincludingunconformityroofrock,weatheredclaylayerandsemi-weatheredrock.ItalsoCanbetwo—layerstructureifwithoutweatheredclaylayer.Andpartofsemi—weatherrockCanbeformahardshellaccuseofitsfillingproce
7、ssduringthelaterstage.Geologicalcharacteristicofthestructurelayerofunconformityisdifferentinlithology,mineralogy,elementgeochemistryandweatherdegreeindex.Basedonoptimalpartitionofsequentialnumberandprincipalcomponentanalysis,loggingquan
