PDF
Full
Outline
Objective Distributive fluvial systems （DFS） are widely developed in modern and ancient sedimentary strata and they are important hydrocarbon reservoirs. Multiple interacting DFS and evolving axial rivers may be developed in a narrow， shallow lacustrine basin with low accommodation. Methods Reproducing the deposition process through flume simulation experiments， this study used a high-precision three-dimensional （3D） scanner with a self-developed program to visual analyze the deposition area and clarify the stage-by-stage evolution characteristics of the DFS. Results （1） With the expansion of the DFS scale， the water flow on its surface gradually aggregates； the initial flow pattern is sheet flow， which then evolves into unrestricted and restricted flow； （2） as the basin can accommodate less space， the axial water flow in the basin gradually aggregates into an axial river， which has a destructive effect on the two sides of the DFS and constantly breaks， forming a large-scale fluvial deposition； （3） when multiple DFS are developed in a narrow， shallow lacustrine basin， the sedimentary sands are concentrated at the DFS near the source and downstream of the axial river， and the longer basin development time indicates a larger scale of fluvial deposition. Conclusions This study describes the developmental processes and sand body spreading patterns of multiple DFS and axial rivers developed in a narrow， shallow lacustrine basin with low accommodation and sufficient supply of material sources at the basin scale， providing theoretical support for oil and gas exploration and the study of distributive fluvial systems.
PDF
11
5
| 科 Family | 属数 Number of genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) | 属 Genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) |
|---|---|---|---|---|---|---|
| 鹅膏菌科Amanitaceae | 2 | 11 | 5.26 | 鹅膏菌属 Amanita | 10 | 4.78 |
| 小菇科 Mycenaceae | 2 | 12 | 5.74 | 丝盖伞属 Inocybe | 5 | 2.39 |
| 多孔菌科 Polyporaceae | 8 | 14 | 6.70 | 蜡蘑属 Laccaria | 5 | 2.39 |
| 红菇科 Russulaceae | 3 | 23 | 11.00 | 小皮伞属 Marasmius | 6 | 2.87 |
| 小菇属 Mycena | 11 | 5.26 | ||||
| 光柄菇属 Pluteus | 5 | 2.39 | ||||
| 红菇属 Russula | 17 | 8.13 | ||||
| 栓菌属 Trametes | 5 | 2.39 |
关闭全屏
No. 86 Xueyuan South Road, Haidian District, Beijing
010-62199257
qkjq@cast.org.cn
Copyright © 2025 China Association for Science and Technology. All rights reserved. For all open access content, the relevant licensing terms apply.
Sponsored by the Office of the Leading Group for Cybersecurity and Informatization of CAST, and supported by Science and Technology Review Publishing House
