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1、中文7700字FormationMechanismandDistributionofPaleogene-NeogeneStratigraphicReservoirsinJiyangDepressionAbstractDuringPaleogene-Neogeneperiod,multiplescaleunconformitieshadbeenformedinJiyangdepression,whichprovidedfavorableconditionsforstratigraphicreservoirs.Inrecentyears
2、,variousPaleogene-NeogenestratigraphicreservoirsinJiyangdepressionhavebeenfound,andprovedreserveswererisingsignificantly,whichfullyshowedagreatexplorationpotentialforthiskindofreservoirs.Butthepracticeofexplorationinrecentyearsindicatedthattheunconformitiescarriersyste
3、manditsabilityofsealing,petroleummigrationanditsaccumulationmodel,distributionofstratigraphicreservoirsareuncertain,whichdeeplyrestricttheexplorationdegreeofstratigraphicreservoirsinJiyangdepression．BasedontheanalysisofalargenumberofexplorationwellsandseismicdataforTyp
4、icalreservoirs,thepaperanalysesunconformitiesconstructanditseffecttogenerationinthePaleogene—Neogene,andsummarizethedistributionpatternofstratigraphicreservoirsbasedonpetroleummechanismandaccumulationmodel.Finally,ahighlyquantitativepredictionmodclofheightofpoolsinstra
5、tigraphicreservoirswasestablished,theresearchresultseffectivelyguidedtheexplorationPra-cticeofstratigraphicreservoir.TherearefourmacrounconformitytypesofPaleogene—Neogeneformationwhichincludingtruncation-overlap,truncation·parallel,parallel—overlapandparalelunconformit
6、yinJiyangdepression.Besidestruncation-overlapunconformityliesinslopesofdepression,andparallelunconformitydevelopedinsideofdepression,anothertwotypeslieinlocalareas.Unconformitycanbedevelopedverticallythree-layerstructurewhichincludingunconformityroofrock,weatheredclayl
7、ayerandsemi-weatheredrock.ItalsoCanbetwo—layerstructureifwithoutweatheredclaylayer.Andpartofsemi—weatherrockCanbeformahardshellaccuseofitsfillingprocessduringthelaterstage.Geologicalcharacteristicofthestructurelayerofunconformityisdifferentinlithology,mineralogy,elemen
8、tgeochemistryandweatherdegreeindex.Basedonoptimalpartitionofsequentialnumberandprincipalcomponentanalysis,loggingquan
