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Analysis on tectonic evolution and exploration potential in Dabashan foreland basin
Author(s): 
Pages: 23-28
Year: Issue:  6
Journal: ACTA PETROLEI SINICA

Keyword:  大巴山地区前陆盆地冲断带下沙溪庙组河流-三角洲沉积;
Abstract: 根据野外地质调查、地震资料解释以及大量岩心分析化验等资料,探讨了大巴山前陆盆地的形成及演化,分析了油气勘探潜力.研究结果表明,大巴山前陆盆地形成始于燕山中幕,盆地演化经历了J1-J12陆内坳陷湖盆阶段、J22-J3前陆盆地阶段、K1-N盆地萎缩阶段以及喜马拉雅期最终定型阶段.大安寨段和凉高山组两套优质烃源岩的有机质丰度高,有机质类型以Ⅱ1型和Ⅱ2型为主.侏罗系发育大安寨段、凉高山组自生自储型和下沙溪庙组下生上储型3套生储盖组合.有利勘探区带包括大巴山前冲断带、川北凹陷带和川中低隆起带.
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