20743.鄂爾多斯盆地上古生界沉積體系及油氣富集規(guī)律研究

1、分類號(hào)：——密級(jí)：——單位代碼：!鰻2Z學(xué)號(hào)：2QQ壘!Q!緞西北大學(xué)博士學(xué)位論文題目：郢巫璽蚯坌地土直生晝沉塑住丕及濁氫宣塞趣徨班塞指導(dǎo)教師：奎塞厘專業(yè)技術(shù)職務(wù)：數(shù)援學(xué)科(專業(yè))：濁氫圈地廈皇玨筮答辯日期：星QQZ生魚學(xué)位授予日期：二0O七年六月ResearchonsedimentarysystemsandhydrocarbonsenHchmentoftheUpperPalaeozoicoftheOrdosBasinAbstractA

2、imingatthesubtlegasreservoirscharacteristicoflowporelowpermeabilitylowabundanceandlargeareasdistributionoftheupperPaleozoicinO／dosbasin。inthewayofstudyingtypicalgasreservoirsintheclueofthehighbanefieialreservoirdistribut

3、ionandgasmigrationandonthe鯽phasisofgasreservoirdistributionandhighpermeabiliv／reservoirgenerationandaccumulationregulation，thepaperisbasedontheexistingresearchdatacombinedwiththen哪theoryandprogressofthesedimentologyseque

4、ncestratigraphyreservoirsedimentologypetroleumgeologyereandanalyzessystematicallygeologicalcondition，accumulationmodelhigIlboneficiaIreservoirformationmechanicsdistributionregulationofthelithologicai北servo弧andpointstheva

5、lidexplorationOnthebasisofstratigraphieclassificationandcomparisonstudythestratafromBenxiformationtoIaterShiheziformationwasdividedintotwoIOKlersequences(supertermstratigraphiebaselevelcirele)andeightIIord盯sequences(midd

6、letermslratigraphiebaselevelcirclc)，and22IllordersequencesmiddlecyclescouldbeendividedintomanyshortcyclesBasedonthesequencesofsedimentarycharacteristic，theUpperPaleozoiccoulddistinguish3sedimentarysystemgroup8sedimentary

7、system(faeies)，22subfaciesand40microfaeiesanddisemseddetaillytheehameteristicofallkindsoffaciessubfaeiesandmierofaciesandspatiotempomldistributionofthemBasedonanalyzingtheregionalgeologicbackground，imlaeocurnmtdirectionl

8、ightmineral，heavymineraisrocktraceelemantcharacteristicstheauthorconcludedthattherehadthreepI譏arysedimentaryprovenancesinnorthandfouxprimarysedimentaryprovenancesinsouthemOrdnsBasinandputforwardthenewviewpointthatthewest

9、provenancebegantosupplysinceHe一8stageFurthermoretheauthorconsideredthatthestructuralattributecharactersofthesouthandnorthsedimentaryoriginswG目reevidentlydifferentbyutilizingtherockgeochemicalcharaeteristicstoanalyzestruc

10、tumlehameteristiesofsedimentaryoriginsWhereaReranalyzingthepalaeogeograpbyandevolutionofOrdosBasinindifferentperiodsinneopaleozoic，theauthorgainedthenewstandpointsthattheredevelopedthefandeltasinnorthinearlypermianandthe

11、highconstructivebraidedriverdeltainlIe8stageandthoughtthatmainlvdevelopedthreecoalformingmodeIsofthebarriercoastriver(or(Iel協(xié)plain)andthetidaldelta11磚SOUl口CerocksofUpperPalcozoichadgasformingcentersinwestandeastofOrdnsBa

12、sin11聆gasaccumulationmodelswas‘widelycovered”coalfⅢrnedgasreservoirthathadcontinuousgasgeneratingcapaeityandthegasgenerationpeakofgasgenerationintheeastern撇isearlierthanthatin血ewcstan硼魂The陀sefvoirrockbodieshadthreepetrol

13、ogiccharacteristicthatwe糟highcolltelll$offillingmateriaIshi曲compositionalmaturityandlowtexturalmaturityn幅reservoirqualitywasmainiycontrolledbyprovenancesandsedimentaryfaciesmmainlyreservoirtyp髂hadtypeI、Ⅱ、ⅢandIVandthetype

14、IIandIliweretheprimaryreservoirtypesThehighteffectivereservoirmainlydevelopedinc∞怫gramgravelbearingcoarsegrainedandmediumcoarsequartzsandstonethatdepositedbyhighenergywaterchanneIsandmainlyappearedinthesubsequeneecycleso

15、frapidmaril把(1a蛐transgressiontooscillatingrear1ake)transgressionsandregressions(progradationsandbody)，andtorelativeinactiveperiodoflowstandsystemtlaetsporeassemblagetypesmainlyweretheintergranularpores帆theiI】恤卿ularporesd