中国石油大学学报（自然科学版）2025，Vol.49Issue(2)：42-55,14.DOI:10.3969/j.issn.1673-5005.2025.02.004
鄂尔多斯盆地庆城油田Z211井区长6油组湖底扇多级次砂体构型表征
Multilevel sand architecture characterization of sub-lacustrine fan in Chang_6 member,Z211 area,Qingcheng Oilfield,Ordos Basin
摘要
Abstract
A detailed case study of the Z211 area in the Qingcheng Oilfield,Ordos Basin,was conducted to analyze the deposi-tional architecture of the sub-lacustrine fan in the Chang_6 member.Utilizing extensive core data,well logs,seismic interpreta-tion,and production dynamics,the study employs a fine-scale isochronous stratigraphic framework combined with the methods of hierarchical analysis,multi-dimensional interaction,vertical-horizontal well integration to characterize the sub-lacustrine fan at different hierarchical levels.The results indicate that the architecture of sub-lacustrine fan can be subdivided into five levels:individual sub-lacustrine fan,lobe complex set,lobe complex,individual lobe,and accretion.The individual sub-lacustrine fan is formed by the vertical stacking of multiple lobe complex sets,each of which consists of lobe complex deposits.A lobe complex comprises multiple individual lobes sharing a unified supply channel and follows a compensational superimposition pat-tern.The superimposition patterns and quantitative scales of individual lobes are controlled by short-term base-level cycles.During low base-level periods,individual lobes exhibit continuous compensational stacking,forming larger-scale deposit with a well-developed"fusiform"shape.In high base-level periods,individual lobes are either isolated or partially compensationally stacked,resulting in smaller-scale deposits with a"narrow belt"shape.Based on architecture characterization,two three-di-mensional depositional models of sub-lacustrine fans were established,which included finger-shaped lobe sub-lacustrine fan and fan-shaped lobe sub-lacustrine fan.This findings of this study contribute significantly to the understanding of lacustrine gravity flow sedimentary architecture and provide valuable insights for the efficient development of oilfields.关键词
湖底扇/单一朵叶体/砂体构型/鄂尔多斯盆地/庆城油田/长6油组Key words
sub-lacustrine fan/individual lobe/sand architecture/Ordos Basin/Qingcheng Oilfield/Chang_6 member分类
地质学引用本文复制引用
刘瑞璟,吴胜和,岳大力,白斌,王武荣,侯秀林,赖桢媛,董若婧,李伟,李桢..鄂尔多斯盆地庆城油田Z211井区长6油组湖底扇多级次砂体构型表征[J].中国石油大学学报（自然科学版）,2025,49(2):42-55,14.基金项目
中国石油天然气集团有限公司-中国石油大学(北京)战略合作科技专项项目(ZLZX2020-02) （北京）
国家自然科学基金项目(42272186) （42272186）
国家自然科学基金青年科学基金项目(42302128) （42302128）
