天然气地球科学 ›› 2019, Vol. 30 ›› Issue (11): 15691578.doi: 10.11764/j.issn.1672-1926.2019.08.002
闫磊1(),朱光有1,陈永权2,韩长伟3,杨敏1,杜德道1,朱文平2
Lei Yan1(),Guang-you Zhu1,Yong-quan Chen2,Chang-wei Han3,Min Yang1,De-dao Du1,Wen-ping Zhu2
摘要:
塔里木盆地下寒武统烃源岩是近年来诸多学者研究的热点,对于其分布的认识还存在一定的分歧,并成为制约寒武系勘探及区带优选的重要因素。基于野外露头及盆地内钻井资料的认识,分析下寒武统烃源岩的沉积环境;通过正演模拟下寒武统玉尔吐斯组烃源岩的地震反射特征,结合模拟结果,刻画下寒武统玉尔吐斯组烃源岩沉积边界;基于震旦系与寒武系地震解释与成图研究,分析寒武系沉积前古地貌特征及寒武系的沉积环境,探讨下寒武统烃源岩的主要控制因素,旨在解决下寒武统生烃源岩的生烃中心,指导寒武系有利勘探区带的优选。研究认为,玉尔吐斯组为寒武纪早期持续海侵背景下、分布稳定的烃源岩;正演模拟结果及地震资料表明,玉尔吐斯组表现为寒武系底部强波峰—强波谷的地震反射特征,在盆地内可追踪对比;根据塔里木盆地震旦纪与早寒武世古地理格局认识,认为寒武系台缘斜坡—盆地一带为下寒武统烃源岩厚度加厚区,是台盆区烃源岩最富集的地区。
中图分类号:
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