石油与天然气地质 ›› 2024, Vol. 45 ›› Issue (2): 486-501.doi: 10.11743/ogg20240213
收稿日期:
2023-12-03
修回日期:
2024-01-28
出版日期:
2024-04-30
发布日期:
2024-04-30
通讯作者:
宋璠
E-mail:2442704787@qq.com;songfan0026@163.com
第一作者简介:
邵长印(1998—),男,硕士研究生,沉积学、储层地质学。E-mail:2442704787@qq.com。
基金项目:
Changyin SHAO1(), Fan SONG1(), Shiqi ZHANG1, Qiuyue WANG2
Received:
2023-12-03
Revised:
2024-01-28
Online:
2024-04-30
Published:
2024-04-30
Contact:
Fan SONG
E-mail:2442704787@qq.com;songfan0026@163.com
摘要:
渤海湾盆地黄河口凹陷SC7区块滩坝是滨浅湖区的重要储集体,厘清其砂体内部结构特征对油气开发具有重要指导意义。根据现代沉积和岩心、录井、测井资料研究,对SC7区块古近系东营组二段下亚段(东二下亚段)砂体进行构型解剖,将厚泥-薄砂式滩坝划分为坝中心、坝侧缘、内缘滩、外缘滩和湖相泥5种沉积微相类型。基于厚泥-薄砂式滩坝成因和内部结构特征分析,研究了滩坝沉积特征、沉积模式和生长过程。将滩坝构型分为复合砂坝、单一坝和增生体3个级别,探讨各滩坝砂体构型单元空间展布特征。提出了单一坝坝间泥岩、测井曲线特征、相对高程差和单一坝侧向相变4种识别标志。用识别标志对密井网区单一坝进行划分,分析了单一坝规模、演化过程及连通性。在单一坝内部划分出4期增生体,最终确定了4级构型界面、单一坝侧向相变和单一坝内部增生体对油气分布的影响。
中图分类号:
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