Abstract Studies on the depositional architecture have extended from previous detailed characterization to analysis of genetic mechanism over the past decade. This paper introduces recent research progress in respects of the alluvial fan controlled by syn-depositional reverse faults,fluvial point bars influenced by accommodation space,fingered bars of shallow water delta,and gravity flow sedimentation within the intraslope minibasins. (1)In the compressional basin margin,the complex activities of syn-depositional reverse faults exert significant controls on the alluvial-fan architectural elements,stacking patterns,distribution,evolution,and size,showing distinctive alluvial-fan architecture models from the conventional alluvial fans developed in the stable structural conditions. (2)Under low accommodation space,the fluvial deposits are characterized by downstream-migrating point bars,showing distinctive microfacies types,distribution patterns,and cyclic characteristics. When the accommodation space/sediment supply(A/S)value increases,the point bars gradually evolve from scaly shape into banded shape,and ultimately point shape. (3)Similar to the fluvial-dominated deep-water delta,the shallow-water delta can develop fingered bars,whose plane morphologies,microfacies combination patterns and size are greatly influenced by climate,sediment supply and sedimentary water body. (4)Sediment gravity flows within the intraslope minibasins can form gravity-flow channels,lobes,and mass-transport deposits. These deposits exhibit distinctly spatial distribution patterns,size and architectural evolution models,which are influenced by the complex palaeogeomorphology and tectonic activity. A comprehensive and quantitative study based on integrated proto-model analysis,sedimentary physical and numerical simulation is essential to build quantitative and predictable architectural models for clastic systems,which is the future research direction for depositional architecture researches.
Fund:Co-funded by the National Natural Science Foundation of China (Nos.41772101,42002112),the National Science and Technology Major Project (No. 2017ZX05049-006-001), and the Strategic Cooperation Technology Projects of CNPC and CUPB(No. ZLZX2020-02)
About author: Wu Sheng-He,born in 1964,is a professor and Ph.D. supervisor of China University of Petroleum(Beijing)and is mainly engaged in reservoir characterization and modelling. E-mail: reser@cup.edu.cn.
Cite this article:
Wu Sheng-He,Yue Da-Li,Feng Wen-Jie et al. Research progress of depositional architecture of clastic systems[J]. JOPC, 2021, 23(2): 245-262.
Wu Sheng-He,Yue Da-Li,Feng Wen-Jie et al. Research progress of depositional architecture of clastic systems[J]. JOPC, 2021, 23(2): 245-262.
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