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时间:2020-03-26
《陕西渭河盆地前新生界地质特征及其油气意义.pdf》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34卷第1O期地质通报Vo1.34,No.102015年10月GEoLoGICALBULLETIN0FCHINAoCt..2015~~.,~田~月●,可陕西盆地前新生界地质特征及其油气意义王建强,刘池洋,高飞,张东东,李永项,李智超WANGJianqiang,LIUChiyang,GAOFei,ZHANGDongdong,LIYongxiang,LIZhichao1.西北大学地质学系/大陆动力学国家重点实验室,陕西西安710069;2.陕西延长石油集团研究院,陕西西安7100751.DepartmentofGeology,NonhwestU
2、niversity/StateKeyLaboratoryofContinentalDynamics,Xi"an710069,Shaanxi,China;2.ShaanxiResearchInstituteofYanchangPetroleumGroup,Xi’an710075,Shaanxi,China摘要:渭河盆地位于鄂尔多斯地块与秦岭造山带的过渡地带,为新生代断陷盆地。依据渭河盆地沉积一构造演化过程、渭北隆起和秦岭造山带中新生代演化及隆升特点,结合钻井资料及水溶天然气同位素分析,综合探讨了渭河盆地前新生代地质特征。渭河盆地在前新生代应为秦
3、岭造山带与鄂尔多斯盆地之间的古斜坡带,前新生界总体表现出边部老中间新的特点,其中北部斜坡区大部分以早古生代碳酸盐岩地层为主,中南部深凹陷区则广泛保留晚古生代石炭系一二叠系煤系地层,局部地区可能仍有中生代地层残留,暗示渭河盆地前新生界仍存在重要的潜在烃源岩。该认识对探讨渭河盆地的形成演化及天然气勘探具有重要意义。关键词:渭河盆地;前新生代;渭北隆起;秦岭造山带;油气前景中图分类号:P534.6;P618.13文献标志码:A文章编号:167卜2552(2015)10—1981—11WangJQ,LiuCY,GaoF,ZhangDD,LiYx,Li
4、ZC.Pre—Cenozoicgeologicalcharacteristicsandoil—gassignificanceinWeihebasin,ShaanxiProvince.GeologicalBulletinofChina,2015,34(10):1981—1991Abstract:TheWeihebasinisaCenozoicfaultbasinlocatedatthejunctionofOrdosbasinandQiNingorogenicbelt.Inthispaper,thepre——Cenozoicgeologicalc
5、haracteristicsarediscussedbasedonanintegratedanalysisofthesedimentaryandtectonicevolutionofWeihebasin,theevolutionanduphKcharacteristicsoftheWeibeiuphfandtheQiNingorogenicbeltduringMesozoic—Cenozoicperiod,thedri~ngdataandthehydrocarbongasofgeothermalwaterisotopeintheWeiheba
6、sin.ItisconsideredthattheWeiheareawasapaleo——slopezonebetweenQinlingorogenicbeltandOrdosBasinwithrelativelyolderpre——Cenozoicgroupsattheedgeandneweronesinthemiddle.MostofthenorthernslopezoneofWeihebasinisoccupiedbytheearlyPaleozoiccarbonate,whileinthesouth—centraldeepsagsof
7、Weihebasin,thelatePaleozoicCarboniferous—Permiancoalmeasuresmightbewidelyexistent,withthelocalexistenceofMesozoicstrata,whichareimportantpotentialsourcerocksintheWeihebasin.Theresultsachievedbytheauthorsareofgreatsignificancefortheformation—evolutionstudyofWeihebasinanditsg
8、asexploration.Keywords:Weihebasin;pre——Cenozoic;Weibeiuplift;Qinlingorogenicbelt;o
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