陈永权,严威,韩长伟,闫磊,冉启贵,亢茜,何皓,马源
Chen Yong-quan,Yan Wei,Han Chang-wei,Yan Lei,Ran Qi-gui,Kang Qian,He Hao,Ma Yuan
摘要: 寒武系盐下白云岩是塔里木盆地油气勘探的重要领域之一,下寒武统源储分布认识不清楚已成为制约该领域区带优选的重要因素。通过对寒武系/前寒武系不整合特征、南华系—震旦系与中下寒武统沉积盆地地震解释与成图研究,探讨寒武纪/前寒武纪柯坪运动前后沉积盆地转换,旨在解决生烃坳陷与下寒武统肖尔布拉克组白云岩分布问题,指导有利勘探区带的优选。研究结果认为,柯坪运动对塔里木盆地南部影响强于北部,由于盆地南部大面积隆升,形成了塔西台地区早中寒武世南高北低的古构造格局,下寒武统由北向南超覆尖灭;塔里木盆地北部表现为继承性沉降特点,中下寒武统地层序列完整。柯坪运动导致了塔里木盆地沉积体系由南华系—震旦系北东走向裂坳沉积体系转换为东西分异、南北分异的台盆沉积体系。提出满西地区是南华纪、震旦纪、早中寒武世继承性凹陷,可能发育多套烃源岩,是台盆区内生烃能力最强的地区;肖尔布拉克组白云岩储层主要沿环满西凹陷分布;建议将塔中地区、古城地区与轮南地区作为优先勘探区带。
中图分类号:
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