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ID:37395742
大小:1.26 MB
页数:9页
时间:2019-05-23
《准噶尔盆地中央坳陷带油气成藏过程分析》由会员上传分享,免费在线阅读,更多相关内容在学术论文-天天文库。
1、维普资讯http://www.cqvip.com学兔兔www.xuetutu.com天热乞比第29卷第4期0IL&GASGEOLOGY2008年8月文章编号:0253—9985(2008)o4一O444—09准噶尔盆地中央坳陷带油气成藏过程分析尹伟,郑和荣,徐士林,马丽娟,贾庆素,伍新和(中国石油化工股份有限公司石油勘探开发研究院,北京100083)摘要:车一莫古隆起的形成、演化控制了中央坳陷带中生界油气的成藏与演化。中、晚侏罗世,油气较大规模充注,形成了早期“车一莫古油气聚集带”;侏罗纪末期地层抬升剥蚀,部
2、分油藏遭受破坏;早白垩世末一古近纪,油气大规模充注,形成了中期“车一莫古油气聚集带”,是中央坳陷带侏罗系和白垩系原生油气藏的主要成藏期;新近纪以来,“车一莫古油气聚集带”最终破坏,中央坳陷带现今油气分布面貌最终形成。总体而言,早期(中侏罗世晚期一古近纪)隆起背景控制中央坳陷带中生界的油气富集,晚期(新近纪以来)构造调整决定该区现今的油气分布。车一莫古隆起及两翼油气资源丰富,尤其是其南翼的中、上侏罗统剥蚀区,保存条件好,受后期构造运动影响小,是下一步油气勘探的重点地区。关键词:成藏期次;成藏过程;车一莫古隆起;
3、中央坳陷带;准噶尔盆地中图分类号:TEl22.3文献标识码:AAnanalysisontheprocessofhydrocarbonaccumulationinthecentraldepressionbeltoftheJunggarBasinYinWei,ZhengHerong,XuShilin,MaLijuan,JiaQingsu,WuXinhe(SINOPECExploration&ProductionResearchInstitute,Beijing100083,China)Abstract:Thefo
4、rmationandevolutionoftheChe—Mopalaeo—highcontrolledhydrocarbonaccumulationandevo—lutioninthecentraldepression.TherelativelylargevolumeofhydrocarbonchargingduringtheMiddleandLateJurassicformedtheearly“Che—Mofossilhydrocarbonaccumulationbelt”,partofwhichwaswr
5、eckedbytheup—liftinganddenudationintheLateJurassic.Anotherlarge—scalehydrocarboncharginghappenedandformedthemiddle“Che—Mofossilhydrocarbonaccumulationbelt”duringthelateEarlyJurassic—Paleogene,whichwasalsothemainreservoiringstagefortheprimaryoilandgasreservo
6、irsintheJurassicandCretaceousinthecentralde—pression.The“Che—Mofossilhydrocarbonaccumulationbelt”wasfinallydestructedsincetheNeogene.resultinginthepresentdistributionofoilandgas.Generallyspeaking,theearlyupliftingduringthelateMiddleJurassic—Paleogenecontrol
7、ledtheoilandgasaccumulationoftheMesozoicinthecentraldepression,whilethelatestruc—turaladjustmentsincetheNeogenedeterminedthepresentdistributionofoilandgas.TheChe—Mopaleo—highanditsflanks,especiallyareasinitssouthflankwheretheMiddleandUpperJurassicweredenude
8、d,arerichinoilandgasresourcesbecauseofthefavorablepreservingconditionsandslightinfluencefromlatertectonicmove—ment,thusareimportantareasforfutureexploration.Keywords:stageofhydrocarbonpooling;processof
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