苏北盆地上白垩统—第三系层序地层与沉积演化-数字图书馆

,,,(CIP)/,,.:,2006.5ISBN7116048448................P535.253CIP(2006)045483SUBEIPENDISHANGBAIETONGZHIDISANXICENGXUDICENGYUCHENJIYANHUA::::31,100083:[phone]();[phone]():@gph.com.cn:[phone]::787mm1092mm1/16:10.5:256:1800:20065:30.00ISBN7116048448/P2685(,,),,3.5km2,3,,,,,,,,,,,,,,,,,,,,,:3:(K2tE1f),,3,,3;(E2dE2s),,,NE,;(Ny),,Ny2,2314;,3,3;3():,,,,,;,,,,,,;,,,,,:,1233,K2t2,(E1f2E1f4),,,;,,,;;,,,,,,,,,,20064PrefaceSubeiBasinisalargefault-depressedbasin,whichbelongstoCretaceoustoTertiaryineastofYangziParaplatform.Itdevelopedonawholefoldbelt,whichbelongstoPaleozoictoEarlyMesozoic.Itsareais3.5104km2.Fromnorthtosouththerearethreesecondarystructuralu-nits:YanfuDepression;JianhuupliftandDongtaidepression.TheDongtaidepressioniscom-posedofJinhuFault-depressed;GaoyouFault-depressed;QintongFault-depressedandHaianFault-depressed.TheyarethemainpartareasforoilandgasexplorationinSubeibasin.TheMes-ozoicandCenozoicsedimentaryrocksinSubeiBasinaregreatlythicknessandWidelydistribu-tion.Themainsourcerock-reservoirisdevelopedinPalaeogeneFuningGroup.Thedarkclay-stonedevelopedinNo.2segmentandNo.4segmentofFuningGroup,whichbelongtosustaineddeep-lakedeposition.TheNo.1segmentandNo.3segmentofFuningGroupdevelopedlotsofsandstonereservoirs.ThePalaeogeneDainanGroupandEarlyCretaceousTaizhouGrouphadalsodevelopedsourcerocksinpartsareas.WithexplorationanddevelopmentofSubeibasinformanyyears,theoilfields,whichhadbeendiscovered,andexplorated,hasachievedhighcontainingwaterstage.Moststructuraltrapshavebeendiscoveredandbringintodrilling.Itshowsthattherearegreatpotentialsinsearchingstratumandlithologictap,especiallylithologicoilpoolinsagareas.Withdevelopmentofse-quencestratigraphy,especiallyhigh-resolutionsequencestratigraphy,theexplorationofsubtlepoolhasgoneintoanewperiod.Itisanimportantwaytopredictsubtlepoolandfindnewoilre-servesusinghigh-resolutionsequencestratigraphywhichsearchgoodreservoirsinpurpose,in-tegratewiththetraditionalsedimentaryfaciesandsedimentarysysteminSubeiBasin.Thelithos-tratigraphicoilpools,whicharecontrolledbylithofaciesandstratum,havebecomethemostreal-istic,mostpotentialandmostuniversalnewterritory.Fromtheconceptofsequencestratigraphy,intheframesofsequences,itcanpredictfavora-blefaciesbeltsandfindstratumoilpoolnearthesequenceboundarybyoptimalcombinationofsourcerock,reservoirandcaprock.Nearthemaximum-floodingsurface,itcaneasilydevelopli-thologicup-dippinchoutoilpoolandlithologiclenticularbodypool.Allkindsoffanbodies,whichdevelopedinthetimeoflowordersystemtract,arethelucrativetargetofdevelopingstra-tumlithologictrap.Basedonthedifferentfaciesbeltsindeferentsedimentarysystems;physicalpropertycharac-teristicsandtheconditionoflateralvariation,thedeltasedimentarysystemwhichdevelopedinlakebasinarefavorofdevelopinglithostratigraphyoilpools.Inthedeltasedimentarysystem,theunderwaterdistributaryschannelsandmouthbarsofdeltafrontarethesweetpoint.Therearelotsofwatersystemsandtheshakingoflakebasinarefrequentlyincontinentaldeposite,whichleadtogreatshrinkingandexpandingoflakewater.Thesandbodiesandsourcerocksarewide-spreadcontacted,whichmakeallkindsofreservoirshavemorechancestobecomeoilpools.BasedonthetectonicdevelopmenthistoryofSubeiBasin:thedevelopmentandevolutionofSubeiBasinarecloselyrelationshipwithYangziplatedispositionandTanluruptureactivity.Thebasinformationcanbedividedintothreeperiods:Thefirststageisfaultsag(K2tE1f)periods,thetectonicactivityfeaturewasopen-shearinganddraw-openingalternationthreetimes,whichleadingtolakebasinexpandingandseawaterintrudingandthreemostimportantsourcerockweredevelopedinthebasin.Thesecondstageisfaultdepression(E2dE2s).Thesecondstageisfaultdepression(E2dE2s)periods,thetectonicactivityfeaturewasopen-shearingactivity,whichcausedaseriesofNEdirectionopen-shearingfracturebeltsandthestructurecarryingonthebackreversion,theearlierdaysuniteddepressionbasinwasdividedintoseveralisolatedfaultsag.Thethirdstageisdepression(Ny)periods;thefeaturewastheflatbedpottypedepressionbasinwastransformedfrompre-downfaultedbasin.ThelargedepressionbasinwasformedinNy2periods.Basedonthetectonicdevelopmenthistory,thestratumofEarlyCretaceoustoTertiarycanbedividedintotwofirstordersequence,threesecondsordersequenceandfourteenthirdorderse-quence.ThesequencesarecontrolledbystructureandclimateinSubeiBasin,thethreemaxi-mum-floodingsurfacesandlakeinvasionhappenedinthesametime,whichmakethebasindevel-opedthreegreatsourcerockgroups.Threekindsofstratigraphicmodelsofsequenceinthebasinareproposed,theyarefault-disobeytype,faultdepressiontypeandclosedlakebasintype.Theresearchofsedimentaryfaciesshows:thedepositoftheEoceneDainanGroupismainlyinlacus-trinefaciesandsublacustrinefacies,insomeareasitdepositswithfluvialfacies.TherearegreatdealofreservoirsedimentarytypesinGaoyouSagandJinhuSag.Theexplorationofthetwosagsapproved:thesedimentarysystemandsandbodytypeswerecontrolledbydepressionbackground,whichdevelopedinbothsidesofthesags;theoilaccumulationwascontrolledbythesandbodies.Theturbiditedepositsystem,whichcancomposemainreservoi