毕业论文设计文献翻译地质工程方面中英文对照.docx

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毕业论文设计文献翻译地质工程方面中英文对照

FormationMechanismandDistributionofPaleogene-NeogeneStratigraphicReservoirsinJiyangDepression

Abstract

DuringPaleogene-Neogeneperiod,multiplescaleunconformitieshadbeenformedinJiyangdepression,whichprovidedfavorableconditionsforstratigraphicreservoirs.Inrecentyears,variousPaleogene-NeogenestratigraphicreservoirsinJiyangdepressionhavebeenfound,andprovedreserveswererisingsignificantly,whichfullyshowedagreatexplorationpotentialforthiskindofreservoirs.Butthepracticeofexplorationinrecentyearsindicatedthattheunconformitiescarriersystemanditsabilityofsealing,petroleummigrationanditsaccumulationmodel,distributionofstratigraphicreservoirsareuncertain,whichdeeplyrestricttheexplorationdegreeofstratigraphicreservoirsinJiyangdepression．

BasedontheanalysisofalargenumberofexplorationwellsandseismicdataforTypicalreservoirs,thepaperanalysesunconformitiesconstructanditseffecttogenerationinthePaleogene—Neogene,andsummarizethedistributionpatternofstratigraphicreservoirsbasedonpetroleummechanismandaccumulationmodel.Finally,ahighlyquantitativepredictionmodclofheightofpoolsinstratigraphicreservoirswasestablished,theresearchresultseffectivelyguidedtheexplorationPra-cticeofstratigraphicreservoir.

TherearefourmacrounconformitytypesofPaleogene—Neogeneformationwhichincludingtruncation-overlap,truncation·parallel,parallel—overlapandparalelunconformityinJiyangdepression.Besidestruncation-overlapunconformityliesinslopesofdepression,andparallelunconformitydevelopedinsideofdepression,anothertwotypeslieinlocalareas.Unconformitycanbedevelopedverticallythree-layerstructurewhichincludingunconformityroofrock,weatheredclaylayerandsemi-weatheredrock.ItalsoCanbetwo—layerstructureifwithoutweatheredclaylayer.Andpartofsemi—weatherrockCanbeformahardshellaccuseofitsfillingprocessduringthelaterstage.Geologicalcharacteristicofthestructurelayerofunconformityisdifferentinlithology,mineralogy,elementgeochemistryandweatherdegreeindex.Basedonoptimalpartitionofsequentialnumberandprincipalcomponentanalysis,loggingquantificationrecognitionmethodaboutunconformitystructurelayerswereestablished,onwhicheffectiveidentificationofunconformitystnlcturelayerscanbuachievedinthecaseofnorockcore.Theformationofvariousunconformitystructuretypesis

relatedtomanyfactorssuchas,parentrocklithology,intervalofdepositionhiatus,palaeotopography,andpreservationconditions,whicharetogethertocontrolspatialdistributionsofunconformitystructuretypes.

Macrostylesanditsverticalstructureofunconformitycanbeeffectedasablocking,reservoir,traporcarriersystem.Blockingaffectiontofluiddependsonweatheredclaylayer,hardshellofsemi-weatheredrockandmudstone.Sopetroleummigrationandaccumulationunitsisrelativelyindependenceaboveandbelowunconformityifstructurelayersmentionedaboveexisted.Reservoiraffectionisduetopermeablerock,includingroofsandstone.Semi-weatheredsandstone,semi-weatheredcarbonaterock,semi—weatheredigneousrockandsemi-weatheredmetamorphic.Trap—controllingaffectionrelatedtomacrounconformitytypeanditsjuxtaposetopermeabilityandimpermeabilityrockaboveandbelowunconformity.Itiseasytodevelopstratigraphytrapswherethepermeabilityandimpermeabilitybedsjuxtaposeinatruncation-overlapunconformity,whereuppermeabilityanddownimpermeabilityinparallel-overlapunconformity,anddownpermeabilityandupimpermeabilitybedsjuxtaposeinatruncation-parallel.Transportingaffectionisowingtolateralcontinuityofpermeablerockofunconformity.Inaterrestrialriftbasin,petroleummigrationintransverseorverticalshortdistanceinlocalarea,andisnotconducivetopetroleumlongdistancealongunconformity,becauseinterbeddingpatternofmudstoneandsandstoneisdominated,anditsphysicalpropertyofmudstoneimprovedpoorly.

Becauseofthelongdistancefromresourcetotrap,migrationandaccumulationproceseisverycomplicated..AccumulationprocessofPaleogene-Neogenestratigraphictrapscanbesummarizedasfollowing：

allochthonoussourcerock,compoundtransportation,laterperiodcharging,buoyancyandpressureconversiondrivingforaccumulation,andblockingbynon-permeablelayerofunconformity,Traptypesanditsdistributionarecontrolledbyunconformitystructurestyles.PetroleumdistributionanditsscalearecontrolledbygeneratingabilityofSourcerock.Petroleumaccumulationareaisdecidedbypositivetectonicunits.Ifcarriersystemexisted,oilcolumnofstratigraphicreservoirsiseffectedbyfourmainfactorswhichincludinggenerationexpulsionquantity,migratingdistance,dipangleandcapillaryresistanceofcarrierlayer.Basedontheanalysisofsinglefactor,thepredictionmodelofheightofoilcolumuthroughmulti—factorregressionswasestablished.Basedonthemodel,thepaperdefruitedfavorableareas,whichreservesintheseareasexceed1.5x108t.

Researchresultsofthepapercombinedcloselywithexplorationpractice,andaccordingtopreviousresearchresults，31explorationwellshadbeendrilled,whichofthem17wellsweresuccessfullyfrom2006to2009.ThereisaccumulationprovedreservesWasupto2362x104t.andpredictreserveswasto3684x104t.

Keywords：

Paleogene;Neogene;unconformitystratigraphiereservoirs;Fomationmechanism;distributionpattern;Jiyangdepression

1.Preface

1.1Foundationndandsignifacanceofthetopic

1.1.1Themeorigin

ThethemeisfromtheSinopccproject：

ForminganddistributionofTertiary

stratigraphicreservoirofJiyangdepression.

Themenumber：

P06012，deadline：

2006-2008

1.1.2Foundationandbaekgroundofthetheme

ThetectoniceventsfrequentlyoccurredinJiyangdepressioninpaleogene-Neogene．Itwasfavourofformingstratigraphicreservoirbecauseofexistenceofseveralkindsofunconformity.Basedonstatisticaldata,beneficialareareservoiredoilisabout9500km2,andtheremainingresourceisabout16x108tinstratigraphicreservoirsofpaleogene-Neogenestratas．Since1980s，manyoverlapandunconformityreservoirshavebeenfounded,exploredreservesWasapparentlyincreasedwithdeepexploring.Bytheendof2006,exploredresourcehadbeenupto3.7×108twhichshowedalargeexploringpotential.

But,infact,theresearchonstratigraphicreservoirislackorUttle,especially,

Accumulationpatternandforecastingmodelofoilhavenotbeenstudiedsystematically.Forexample,thesuccessfulratioofexplorationwelltestingwhichisthelowestinallkindsreservoirsWasonly35.7％aboutstratigraphiereservoirinpaleogene-NeogeneinJiyangdepressionfrom2001-2005.Themainlossreasonfortheoverlapandunconformityreservoirsexplorationismigrationandtrapofoilthatisseparently53.5％and23.9％.Hereby,oilmigrationproblemandtrapvalidityareimportantaspectsforoverlapandunconformityreservoirexploring.

Inshort，ithasthreeaspectsasfollowed：

（1）Shallowcomprehensionaboutconductionofabilityofunconformity

Researchonunconformityinpresentindicatedthatitisnotasimplesurfacethree-dimensionbodywhichisimportantformigrationofoilandgas．TherehassomedeepknowsaboutthebasinsinwestChinaandthemarinebasinsinChina.Thesystematictheoryislackaboutstructurecharacteristicwhichdeeplyaffectaccumulatingoilandgas.

（2）Theremainuncertainmigrationandaccumulationprocessofoilandgasaboutstratigraphicreservoirremainuncertain.

Stratigraphicreservoirlayinedgeofbasin.Soitisdifficulttoexactlyholdaccumulationregularofoilandgasbecausefardistancetrapsandhydrocarbonresourcesmakeacomplicatedmigrationprocess.

（3）ForecastingmodelofstratigraphicreservoirthatcouldbeusedtoguideexploreislackItisnecessitytofinelyevaluateandexplorestratigraphicreservoiralongwithdegreeofexploration.Mayorcontrollingfactorsremainuncertaininconstructionof

forecastingmodelofstratigraphicreservoirs.

1.1.3Aim,senseandapplicationvalueoftheme

ThestudyresolvestheproblemofstatigraphicreservoirformationanddistributionofPaleogene-NeogeneinJiyangdepression.Byanalysisofuniformitystructure,theiraffectonstatigraphicreservoirformationwillbeidentify;Theaccumulationmodelwillbeestablishedthroughstudyonstaticgeologiccharacteristicofstatigraphicreservoir;Forecastmodeofoilextentwillbeachievedthroughresearchonoilextentandtopredictoilquality.

ResearchresultsCannotonlybeusedtoeffectivelyguidestatigraphicreservoir

Exploring,toraisedrillingSuccessratio,providetechnicalsupportforincreasingoil

productionoftheSinopec,andalsoprovidereferencetostatigraphicreservoirexploringofBohaiBayarea.Researchwillenormouslydeepenstatigraphicreservoiraccumulationregularandfurtherenrichandimprovesubtlereservoirexploringtheory.

1.2Researchpresentathomeandabroad

1.2.1Presentresearchanddevelopmentathomeandabroad

UnconformityreservoirisoneofimportantexploringobjectsinceLevorsenproposedtheconceptofstratigraphictrapandthenpublishedpaperon‘‘Stratigraphicoilfield”in1936．ItturnsintostratigraphicreservoirandlithologyreservoirbasedonscholarsdeepenlyresearchtheLevorsenstratigraphiceservoir.

Stratigraphictrapisformedasaresultoftheupdipreservoirdirectlycontigencewithunconformityabove.Accordingtotrapplace,accurrenceandbarrier,stratigraphicoilpoolsisdividedintooverlappool,unconformitybarberedpoolandancientbu