岩性油气藏 ›› 2025, Vol. 37 ›› Issue (3): 1322.doi: 10.12108/yxyqc.20250302
• 地质勘探 • 上一篇
谢会文1,2,3, 张亮1,2,3, 王斌1,2,3, 罗浩渝1,2,3, 张科1,2,3, 章国威1,2,3, 李玲1,2,3, 申林1,2,3
XIE Huiwen1,2,3, ZHANG Liang1,2,3, WANG Bin1,2,3, LUO Haoyu1,2,3, ZHANG Ke1,2,3, ZHANG Guowei1,2,3, LI Ling1,2,3, SHEN Lin1,2,3
摘要: 基于地震资料的精细构造解释,采用印模法,对塔里木盆地库车坳陷三叠纪同沉积断层进行了研究,恢复了三叠系沉积前古地貌,并阐明其对沉积的控制作用。研究结果表明:①库车坳陷三叠纪发育库北断裂、巴什—依奇克里克断裂、克拉—阳北断裂以及克深断裂共4排同沉积逆断层,结构上呈叠瓦状,前锋带到达克拉苏构造带以南。②研究区三叠纪古地貌形态近东西向展布,北部与南部分别为南天山造山带和前陆盆地的前缘隆起,中部为库车坳陷的构造低部位,受制于局部低凸起,发育乌什凹陷、拜城凹陷和阳霞凹陷3个凹陷;原型盆地北边界位于现今盆地边界以北24~51 km,原型盆地面积较现今大11 913 km2。③研究区三叠系的沉积与演化受控于古构造格局,总体表现为由南向北逐渐增厚的楔状体,自西向东也有增厚的趋势,且南北向的地层分布具不对称性;由于南天山的造山作用减弱,三叠系具有完整的前陆盆地的“挤压—松弛”的变化规律,俄霍布拉克组发育扇三角洲,克拉玛依组和黄山街组下部为半深湖-深湖沉积,黄山街组上部及塔里奇克组为半深湖-深湖向曲流河的泛滥平原转化,纵向上构成了一个完整的陆相湖盆演化的沉积旋回;同沉积逆断层上升盘都具备次级物源功能,与下盘形成良好的储-盖组合,是有利的潜在勘探领域。
中图分类号:
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