夏雨 1王俊辉 1向显鹏 2马福康 1叶慧如 3何一鸣 3张伟1
作者信息
- 1. 油气资源与工程全国重点实验室,中国石油大学(北京),北京 102249||中国石油大学(北京)地球科学学院,北京 102249
- 2. 中国石油新疆油田采油一厂,新疆克拉玛依 834000
- 3. 长江大学地球科学学院,湖北武汉 430100
- 折叠
摘要
Abstract
Arid distributive fluvial systems(ADFS)have attracted considerable academic interest due to their large spatial extent and potential for hydrocarbon reservoir development.This study focuses on the arid distributive fluvial system,analyzing its dynamic evolution,depositional characteristics,and inter-nal configuration through flume experiments.The findings are as follows:(1)In arid distributive fluvial systems,lobes act as the fundamental depositional building blocks,exerting primary control over system formation and evolution.(2)Based on their formation processes,lobes can be categorized into three types:lateral,oscillating,and accretionary.In cross-sectional view,these types display characteristic stacking patterns:lateral,irregular,and vertical,respectively.Lateral lobes develop primarily along the fan mar-gins and are characterized by large area,length,and width,with high aspect and width-to-thickness rati-os and a lobate geometry.Oscillatory lobes occur at the fan front,sharing similar dimensions and morpholo-gy.In contrast,accretionary lobes are smaller,develop near the fan apex,and exhibit lower aspect and width-to-thickness ratios,with a tongue-shaped geometry.(3)Throughout the evolution of the arid dis-tributive fluvial system,a cyclical process of 'channel incision-lobe front accumulation-lobe lateral migra-tion-lobe backward migration-channel re-incision' is observed,demonstrating regularity and periodicity at various stages of the system's evolution.These findings enhance the understanding of sedimentary proces-ses,internal architectures,and spatial evolution within arid distributive fluvial systems,and offer guidance for reservoir prediction in analogous depositional settings.关键词
干旱型分支河流体系/水槽实验/沉积演化/朵体类型/沉积构型/自旋回过程Key words
arid distributive fluvial system/flume experiment/sedimentary evolution/lobe type/sedimentary configuration/autogentic cycle分类
地质学
