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1、第29卷第l期地球科學(xué)———中國地質(zhì)大學(xué)學(xué)報VoI.29No.l2004年l月EarthScience—JournaIofchinaUniversityofGeosciencesJan.2004武清凹陷石炭—二疊系烴源巖的二次生烴評價朱炎銘,秦勇,范炳恒,桑樹勛,楊永國,姜波中國礦業(yè)大學(xué)資源與地球科學(xué)學(xué)院,江蘇徐州22l008摘要:武清凹陷石炭—二疊系烴源巖自形成以來經(jīng)歷了復(fù)雜的構(gòu)造-埋藏歷史,并發(fā)生過多次生烴演化過程.基于詳細的構(gòu)造-埋藏史研究,結(jié)合磷灰石裂變徑跡測試及礦物包裹體分析,運用EASY%Ro數(shù)值模擬技術(shù),深入研究了武清凹陷石炭—二疊系烴源巖的生烴演化歷史,闡明
2、了石炭—二疊系生烴作用發(fā)生的構(gòu)造期次、生烴強度,揭示了武清凹陷石炭—二疊系烴源巖曾發(fā)生過2次重要的生烴作用過程,分別發(fā)生在燕山期與喜山晚期,得出了二次生烴作用主要發(fā)生在喜山晚期的主要結(jié)論.此外,還結(jié)合有機質(zhì)熱解模擬量版,定量評價了石炭—二疊系各期生烴強度,并提出了武清凹陷是華北石炭—二疊系油氣勘探的最有利地區(qū)之一.關(guān)鍵詞:石炭—二疊系烴源巖;構(gòu)造-埋藏史;二次生烴作用;數(shù)值模擬.中圖分類號:P6l8.l3文章編號:l000-2383(2004)0l-0077-08收稿日期:2003-04-0lEvaluationoftheSecondHydrocarbon-generati
3、onofthePermo-CarboniferousSourceRocksinWugingDepressionZHUYan-ming,OINYong,F(xiàn)ANBing-heng,SANGShu-xun,YANGYong-guo,JIANGboCollegeofResourceandGeosciences,ChinaUniuersityofMiningandTechnology,Xuzhou22l008,ChinaAbstract:AfterthePermo-carboniferoussourcerocksformed,theyhavegonethroughcompIicate
4、dtectonic-buriaIhistoryinWugingdepression,andmuItipIehydrocarbon-generationevoIutionhavetakenpIace.AfterdetaiIedresearchontectonic-buriaIhistory,com-binedwiththefissiontrackstestingandfIuidincIusionanaIyses,usingtheEASY%RonumericaIsimuIation,thepaperreveaIsthee-voIutionprocess,thetectonice
5、pisodesandthestrengthofhydrocarbon-generationofPermo-carboniferoussourcerocks.ItcomestoaconcIusionthattwohydrocarbon-generationprocesseshavetakenpIacesincethePermo-carboniferousformation,anddrawsanim-portantconcIusionthatmorehydrocarbon-generationofthePermo-carboniferoussourcerockstookpIac
6、einIatecenozoic.combinedwiththemeasuringmapofhydrocarbonregeneratedamount&maturationoforganicmatter,weguantitativeIyevaIuatedthehydrocar-bon-generationstrengthofPermo-carboniferoussourcerocksindifferentepisodes.FinaIIythepaperbringsforwardthatWugingde-pressionisanadvantageouszonefortheexpI
7、orationofPermo-carboniferousoiI&gasinNorthchina.Keywords:Permo-carboniferoussourcerock;tectonic-buriaIhistory;thesecondhydrocarbon-generation;numericaIsimuIation.0引言驊坳陷內(nèi)孔古4井、烏深l井等與煤系有關(guān)的油氣藏的發(fā)現(xiàn),顯示了石炭—二疊系良好的勘探前景和對渤海灣盆地多年的勘探揭示深層石炭—二疊潛力,引起對渤海灣盆地的深層石炭—二疊系的石系含煤地層的油氣顯