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时间:2019-05-14
《南华北地区主要层系热演化特征及其油气地质意义》由会员上传分享,免费在线阅读,更多相关内容在行业资料-天天文库。
1、第32卷第2期石油雾骀沾届Vo1.32.No.22O1O年4月PETR0LEUMGE0LoGY&EXPERlMENTApr.,2010文章编号:i001—6112【2010)02—0101~07南华北地区主要层系热演化特征及其油气地质意义赵俊峰,刘池洋,何争光。,刘永涛。(1.西北大学大陆动力学国家重点实验室,西安710069;2.西北大学地质学系,西安710069;3.东方地球物理公司研究院,河北涿州072751)摘要:南华北是我国油气勘探久攻未克的地区之一,客观评价烃源岩的热演化程度及其作用过程,是该地
2、区勘探面临的关键问题。通过对600余组有机质镜质体反射率数据并结合其它古温标的分析,较全面评移该地区古近系、中生界及上古生界烃源岩的热演化特征并探讨了其油气地质意义。古近系热演化多处于未成熟低成熟阶段,平面上呈南低北高的格局;济源凹陷有机质热演化相对较高,达成熟阶段。中生界热演化程度普遍高于古近系,谭庄一沈丘凹陷中部下白垩统、济源凹陷三叠系烃源岩多数处于液态窗范围。上古生界热演化程度空间上极不均一,总体呈南低北高的格局。从热演化与保存条件分析认为,太康隆起及相邻鹿邑凹陷北部的部分地区,可作为古生界常规天然气
3、或煤层气勘探的远景区;周口坳陷倪丘集凹陷中南部、谭庄沈丘凹陷东部及襄城凹陷南部等具有新生代二次生烃的潜力。关键词:热演化;烃源岩;古近系;中生界;上古生界;南华北地区中图分类号:TE122.11文献标识码: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
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