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1、維普資訊http://www.cqvip.com學(xué)兔兔www.xuetutu.com天熱乞比第29卷第4期0IL&GASGEOLOGY2008年8月文章編號:0253—9985(2008)o4一O444—09準(zhǔn)噶爾盆地中央坳陷帶油氣成藏過程分析尹偉,鄭和榮,徐士林,馬麗娟,賈慶素,伍新和(中國石油化工股份有限公司石油勘探開發(fā)研究院,北京100083)摘要:車一莫古隆起的形成、演化控制了中央坳陷帶中生界油氣的成藏與演化。中、晚侏羅世,油氣較大規(guī)模充注,形成了早期“車一莫古油氣聚集帶”;侏羅紀(jì)末期地層抬升剝蝕,部
2、分油藏遭受破壞;早白堊世末一古近紀(jì),油氣大規(guī)模充注,形成了中期“車一莫古油氣聚集帶”,是中央坳陷帶侏羅系和白堊系原生油氣藏的主要成藏期;新近紀(jì)以來,“車一莫古油氣聚集帶”最終破壞,中央坳陷帶現(xiàn)今油氣分布面貌最終形成??傮w而言,早期(中侏羅世晚期一古近紀(jì))隆起背景控制中央坳陷帶中生界的油氣富集,晚期(新近紀(jì)以來)構(gòu)造調(diào)整決定該區(qū)現(xiàn)今的油氣分布。車一莫古隆起及兩翼油氣資源豐富,尤其是其南翼的中、上侏羅統(tǒng)剝蝕區(qū),保存條件好,受后期構(gòu)造運(yùn)動影響小,是下一步油氣勘探的重點(diǎn)地區(qū)。關(guān)鍵詞:成藏期次;成藏過程;車一莫古隆起;
3、中央坳陷帶;準(zhǔn)噶爾盆地中圖分類號:TEl22.3文獻(xiàn)標(biāo)識碼: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