录井工程 ›› 2023, Vol. 34 ›› Issue (4): 112-118.doi: 10.3969/j.issn.1672-9803.2023.04.018
高欢欢①, 邰春磊①, 刘会纺①, 刘长城②, 王静③, 孙鹏①
GAO Huanhuan①, TAI Chunlei①, LIU Huifang①, LIU Changcheng②, WANG Jing③, SUN Peng①
摘要: 歧口凹陷滨海地区沙一段时期主要发育重力流沉积,为厘清其沉积特征及有利砂体展布规律,通过岩心观察、粒度分析等方法对重力流沉积进行研究,认为研究区发育的重力流沉积主要为滑塌型远岸湖底扇,在港西凸起带上砾岩或砂砾岩指示了补给水道的存在,多条顺向发育的断裂所形成的多级断阶古沉积环境是导致远岸湖底扇多级发育的主要形成机制,其物源供给是远岸湖底扇发育的物质基础。基于此构建了歧口凹陷滨海地区沙河街组沙一段远岸湖底扇的沉积模式,明确了远岸湖底扇有利砂体的空间展布规律。该研究对进一步明确沙一段远岸湖底扇砂体有利储层微相类型和预测有利储层分布具有积极意义,为该区下步油气勘探提供了沉积学支撑。
中图分类号:
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