Controls of accommodation to sediment-supply ratio on sedimentary architecture of continental fluvial successions

• DOI: 10.1016/j.petsci.2023.02.015
• Publication Date: 2023-03-10T02:21:31Z
• Authors: Wei Li; Da-Li Yue; Yu-Shan Du; Jian Li; Chi Zhang; Zhi-Qiang Gong; Xue-Ting Zhang; Qing-Lin Shu; Jian Gao
• Keywords: Outcrop

The applicability of sequence stratigraphic models to continental fluvial successions has long been topic for debate. To improve our understanding how architectures record responses changes in the ratio between accommodation rate and sediment-supply (A/S), two case studies are analyzed, including a densely drilled subsurface reservoir imaged with seismic cube, an outcropping succession. dataset provides larger, three-dimensional perspective, whereas outcrop enables observation at higher resolution. On basis both datasets, channel-body density, stacking patterns their formative river types interpreted different scales, these may reflect A/S change (the creation relative sediment supply) discussed. results indicate that (i) undergo four evolutionary stages along increase, i.e., multi-story, mixed multi- two-story, isolated patterns; (ii) density decreases varying from multi-story isolated; (iii) rivers as evolving braided planforms braided-meandering then meandering ones, increase A/S.