沉积学报2025，Vol.43Issue(1)：108-120,13.DOI:10.14027/j.issn.1000-0550.2022.148
东营凹陷西部沙四上亚段湖相碳酸盐岩沉积特征及主控因素
Sedimentary Characteristics and Main Controlling Factors of Lacustrine Carbonates in the Upper 4th Member of the Shahejie Formation,Western Dongying Depression
摘要
Abstract
[Objective]Large-scale lacustrine carbonate sediments were developed in the upper Fourth member of the Shahejie Formation(Ess4)in the western Dongying Depression;however,its development pattern and deposition-al model remain controversial.[Methods]Based on analysis of cores,thin-sections,and well logging data,rock types,sedimentary microfacies,and the spatiotemporal distribution of the Ess4 carbonates in the Dongying Depression were studied in detail.[Results](1)There are eight rock types of lacustrine carbonates in the study area.Based on their lithological associations,four sedimentary microfacies were recognized:reef-shoal,shoal-intershoal,mixed to muddy-lime flat,and storm-gravity flow.(2)The study area was macroscopically characterized by a small structural platform during the period of lacustrine carbonate deposition,and the development and spatial distribution of microfa-cies were controlled by two factors:paleo-geomorphology and paleo-wind field.The paleo-geomorphology determined developing types of sedimentary microfacies and their distribution.On the top of the platform,high-energy facies belts composed of reef-shoal and shoal microfacies developed in the direction of the broad lake basin,while mixed-mud flats were deposited in the landward direction.On the eastern and southern slope of the platform,storm-gravity flows were developed.In addition,hydrodynamic differences between windward and leeward sides caused by the pre-vailing southeast wind affected the sedimentary distribution,which facilitated the formation of a reef-shoal complex and large shallow shoal facies belt,made the main high-hydrodynamic facies NE-SW-direction distribution vertical to wind and wave movement,becoming a contiguous belt and promoting the gradual expansion of these high-hydrodynamic facies southward and eastward.[Conclusions]The deposition model was a wind-wave and geomorphology integrated controlled carbonate platform,which can provide significant guidance for the further oil and gas explora-tion and prediction of favorable phase zones in lacustrine carbonates.关键词
东营凹陷/湖相碳酸盐岩/古地貌/风浪作用/沉积模式Key words
Dongying Depression/lacustrine carbonates/paleo-geomorphology/wind and wave effect/depositional model分类
天文与地球科学引用本文复制引用
王文静,刘圣乾,张震宇,高雅宣,张子微,李雷..东营凹陷西部沙四上亚段湖相碳酸盐岩沉积特征及主控因素[J].沉积学报,2025,43(1):108-120,13.基金项目
国家自然科学基金项目(41902117) （41902117）
大学生创新创业训练计划项目(Yz2020033)[National Natural Science Foundation of China,No.41902117 （Yz2020033）
College Students Innovation and Entrepreneurship Training Program,No.Yz2020033] （）
