11427.鄂爾多斯盆地西南部上古生界天然氣成藏地球化學(xué)特征研究

1、學(xué)位論文創(chuàng)新性聲明本人聲明所呈交的學(xué)位論文是我個人在導(dǎo)師指導(dǎo)下進行的研究工作及取得的研究成果。盡我所知，除了文中特別加以標(biāo)注和致謝中所羅列的內(nèi)容以外，論文中不包含其他人已經(jīng)發(fā)表或撰寫過的研究成果；也不包含為獲得西安石油大學(xué)或其它教育機構(gòu)的學(xué)位或證書而使用過的材料。與我一同工作的同志對本研究所做的任何貢獻(xiàn)均己在論文中做了明確的說明并表示了謝意。申請學(xué)位論文與資料若有不實之處，本人承擔(dān)一切相關(guān)責(zé)任。論文作者簽名：日期：學(xué)位論文使用授權(quán)的說明

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3、fgasgeochemicalcharacteristicsofaccumulationintheUpperPaleozoicofSlouthwestOrdosBasinSpecialty：Mineralogy、Name：HuWeiqiang(Instructor：ZhaoJingzhTheSouthwestOrdosBasinislowporositylowpermeabilitylithologicgasreservoirandit

4、smaingasreservoirsarePermianHe8ofShiheziformationandShanlofshanxiformationBasedonthepreviousresearchresultsandtheexitingexplorationdatausingboththepetroleumsystemtheoryandpoolformingdynamic，guidedbythetheoryandmethodofPe

5、troleumGeologySedimentaryPetrologyHydrocarbonAccumulationGeologyandOil&GasGeochemistrythisarticledetailedstudiesthegasgeochemicalcharacteristics，thenaturalgasorigin，thegassourcerockcharacteristicsandthegasaccumulationper

6、iodThemainconclusionsandinnovativeachievementsthatobtainedbythisarticleareasfollows：IntheSouthwestOrdosBasin，theupperpalaeozoicgasofthisareaismainlycoalgasgeneratedhydrocarbonsourcerocks，andasmallamountofoiltypegasmixesi

7、nThedarkmudstoneasawholepresentsatrendofgraduallybecomingthinnerfromnorthtosouthTheorganicmatterofsourcerockinrelativelyhighabundance，kerogenbelongstotypeIIIAndthethermalevolutionisduringthehighmature—postmaturephasesThe

8、averageoftheintensityofgasgenerationis155108m3／km2ItpresentsatrendofgraduallybecomingsmallerfromnorthtosouthAndtheformationanddistributionoftheupperpalaeozoicgasreservoiriscontrolledobviouslybygassourceconditionTheresear

9、chofupperpalaeozoicnaturalgasintheSouthwestOrdosBasinshowsthattheaverageofCH4is8860％，theaverageofariditycoefficientis9841％The513C1ofgasismainlydistributedin26％0一32％0The6“C2ismainlydistributedin26％033％0The52D1ismainlydist

10、ributedin160％o一190％oThe62DEismainlydistributedin140％o180％oThegasmaturitylevelisbetween12％18％，andisinthestageofmaturetohighmatureThemaindrivingforceforgasmigrationofBenxiformation，Shan2intheSouthwestOrdosBasinisabnormalpr

11、essureformedbyhydrocarbongenerationThemaindrivingforceforgasmigrationofShanlandHe8ismoleculardiffusionreactionforce，andtheupperpalaeozoicgashasthecharacteristicsofproximaldepositmigrationaccumulationTheanalysisoftheupper

12、palaeozoicinclusionandsourcerocksimulationshowsthatatlateTriassic，theupperpalaeozoichydrocarbonsourcerockentershydrocarbongenerationthresholdItisinlowmaturestage，andbeginstoproducehydrocarbonBasicallynogasdischargeAtearl