李卿;李忠权;张玮;刘爱疆;曾吉和;崔文玲;

• 1:成都理工大学油气藏地质及开发工程国家重点试验室

• 2:成都理工大学地球物理学院

• 3:成都理工大学地球科学学院学院

摘要(Abstract)：

龙门山褶皱冲断带位于四川克拉通以东,被围限在扬子、华北和羌塘三大陆块拼贴构造间.以全工区地震精细解释为基础,结合野外调查,选取近东西向的剖面06fsc0003—02tjs1111线,利用平衡剖面法恢复天井山构造带的造山过程.结果表明:天井山构造带的演化可划分为伸展拉张成盆阶段(震旦纪—中三叠世末)、陆隆伸展演化阶段(晚三叠世—中侏罗世末)、挤压抬升剥蚀阶段(晚侏罗世—现今)3期.根据生储盖组合和油气运移条件,认为自元古代以来最大主应力性质发生多次改变,控制构造变形、生储盖组合分布及厚度、断裂特征和油气运聚.印支期冲断带下盘(现今天井山背斜前翼下部)发育形成于印支期晚期的冲起构造,其内断层发育,将二叠系、志留系及寒武系烃源岩与二叠系储层和圈闭串通,有利于烃类的运聚,且有飞仙关组泥岩作为直接盖层,保存条件较好,是油气集聚的有利部位.该研究能够加深对龙门山褶皱冲断带油气分布预测的认识,对油气勘探具有指导意义.

关键词(KeyWords)：龙门山北段;天井山;构造特征;油气聚集;构造演化

Abstract:

Keywords:

基金项目(Foundation):国家自然科学基金重点项目(41030426);; 四川省青年科技基金项目(03ZQ026-046、05JY029-088-2)

作者(Author):李卿;李忠权;张玮;刘爱疆;曾吉和;崔文玲;

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