沉积与特提斯地质2023，Vol.43Issue(4)：722-733,12.DOI:10.19826/j.cnki.1009-3850.2021.04003
点物源扇三角洲的岩相与构型特征:以希里沟湖现代扇三角洲为例
Sedimentary facies and architecture of point-provenance fan deltas:A case study of modern lacus fan delta in the Xiligou Lake
摘要
Abstract
Fan delta deposits are important reservoirs for oil and gas.To illustrate the sedimentary facies and architecture of lacustrine fan delta deposits,we have quantitatively characterized the geometric attributes of different architecture units and clarified the regularity of their distribution.Based on detailed outcrop measurements and architecture interpretations using ground penetrating radar,we have recognized 16 sedimentary facies,eight vertical sequences,and eight architecture units,including main channel(MCH),distributary channel(DCH),sheet flood(SF),braided bar(CB),overbank flow(OF),subaqueous distributary(UCH),river mouth bar(RMB),and sheet sand(SS).The thickness of the distributary braided channels varies from 1.5 m to 2.0 m,with a width-to-thickness ratio of 30 to 70.The thickness of the braided bar varies from 2.0 m to 3.0 m,with a width-to-thickness ratio of 50 to 70.During the same sedimentary period,lacustrine fan delta developed five basic architectural unit combinations,namely,SF-MCH-SF,OF-DCH-CB-DCH-OF,SS-UCH-RMB-UCH-SS,SS-RMB-SS,and SS-UCH-SS.The distribution of architecture units in different depositional periods shows lateral repetition of the five basic combinations and vertical superposition.关键词
油气储层/探地雷达(GPR)/点物源扇三角洲/岩相/垂向序列/构型单元Key words
reservoir for oil and gas/ground penetrating radar/point-provenance fan delta/sedimentary facies/sedimentary sequence/architecture unit分类
天文与地球科学引用本文复制引用
孙洪伟,周新茂,李顺利,于兴河,马嫡,高明轩..点物源扇三角洲的岩相与构型特征:以希里沟湖现代扇三角洲为例[J].沉积与特提斯地质,2023,43(4):722-733,12.基金项目
国家科技重大专项(2017ZX05001-002-004) （2017ZX05001-002-004）
国家自然科学基金面上项目(42272124) （42272124）
