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1、第32卷第2期石油霧駘沾屆Vo1.32.No.22O1O年4月PETR0LEUMGE0LoGY&EXPERlMENTApr.,2010文章編號(hào):i001—6112【2010)02—0101~07南華北地區(qū)主要層系熱演化特征及其油氣地質(zhì)意義趙俊峰,劉池洋,何爭(zhēng)光。,劉永濤。(1.西北大學(xué)大陸動(dòng)力學(xué)國(guó)家重點(diǎn)實(shí)驗(yàn)室,西安710069;2.西北大學(xué)地質(zhì)學(xué)系,西安710069;3.東方地球物理公司研究院,河北涿州072751)摘要:南華北是我國(guó)油氣勘探久攻未克的地區(qū)之一,客觀評(píng)價(jià)烴源巖的熱演化程度及其作用過程,是該地
2、區(qū)勘探面臨的關(guān)鍵問題。通過對(duì)600余組有機(jī)質(zhì)鏡質(zhì)體反射率數(shù)據(jù)并結(jié)合其它古溫標(biāo)的分析,較全面評(píng)移該地區(qū)古近系、中生界及上古生界烴源巖的熱演化特征并探討了其油氣地質(zhì)意義。古近系熱演化多處于未成熟低成熟階段,平面上呈南低北高的格局;濟(jì)源凹陷有機(jī)質(zhì)熱演化相對(duì)較高,達(dá)成熟階段。中生界熱演化程度普遍高于古近系,譚莊一沈丘凹陷中部下白堊統(tǒng)、濟(jì)源凹陷三疊系烴源巖多數(shù)處于液態(tài)窗范圍。上古生界熱演化程度空間上極不均一,總體呈南低北高的格局。從熱演化與保存條件分析認(rèn)為,太康隆起及相鄰鹿邑凹陷北部的部分地區(qū),可作為古生界常規(guī)天然氣
3、或煤層氣勘探的遠(yuǎn)景區(qū);周口坳陷倪丘集凹陷中南部、譚莊沈丘凹陷東部及襄城凹陷南部等具有新生代二次生烴的潛力。關(guān)鍵詞:熱演化;烴源巖;古近系;中生界;上古生界;南華北地區(qū)中圖分類號(hào):TE122.11文獻(xiàn)標(biāo)識(shí)碼:ATHERMALEVoLUTIoNDEGREEANDITSHYDRoCARBoNGEoLoGICALIMPLICATIoNSoFTHEMAINSTRATASERIESINTHESoUTHERNNoRTHCHINACRAToNZhaoJunfeng,LiuChiyang,HeZhengguang。,LiuY
4、ongtao。(1.StateKeyLaboratoryofContinentalDynamics(NorthwestUniversity),Xi’an,Shaanxi710069,China;2.DepartmentofGeology,NorthwestUniversity,Xi’an,Shaanxi710069,China;3.GeophysicalResearchInstituteofBureauofGeophysicalProspecting,CNPC,Zhuozhou,Hebei072751,Ch
5、ina)Abstract:ThesouthernNorthChinaCratoniSoneoftheareainChinaexperienceddecadesofexplora—tionwhilenoindustrialreservoirhasbeenfound.Toobjectivelyevaluatethethermalstatusanditsevo—lutionprocessesisoneofthekeyinthisarea.Basedonmorethan600suitsofR。dataandothe
6、rgeother—mometerdata,thethermalevolutioncharacteristicsanditshydrocarbongeologicalimplicationsofthePaleogene,MesozoicandUpperPaleozoicarediscussedinthispaper.ThevaluesofR。fromthePaleo—geneSystemarehigherinthenorthandlowerinthesouth.Mostoftheorganicmatterin
7、ZhoukouDe—pressionisimmatureandlowmature,incontrastwiththematurestatusinJiyuanandZhongmouSagsofKaifengDepression.ThermalevolutiondegreeoftheMesozoicishigherthantheoneofthePaleogeneingenera1.TheLowerCretaceousinTanzhuang-ShenqiuSagsandtheTrassicinJiyuansaga
8、renowinthepeakliquidhydrocarbon—generatingstage.ThethermalevolutiondegreeoftheUpperPaleozoicshowsstrongheterogeneityinspace,rangingfromimmaturetoovermature,anddecreasedfromnorthtosouth.TaikangUpliftandadjacen