北京大学学报（自然科学版）2025，Vol.61Issue(5)：902-914,13.DOI:10.13209/j.0479-8023.2025.020
塔里木盆地下寒武统肖尔布拉克组沉积相特征及沉积模式
Sedimentary Facies and Model of Xiaoerbulake Formation in the Lower Cambrian in Tarim Basin
摘要
Abstract
Based on field outcrop observations in the north Tarim Basin and thin-section observations of typical drilling wells,we accurately established a sedimentary model and finely characterized the spatiotemporal distribution patterns of high-energy mound and shoal facies.The results show that a carbonate ramp is developed in Xiaoerbulake Formation in Tarim Basin.The types of sedimentary facies include mixed tidal flat,inner-ramp(dolomite-flat,lagoon and shoal),middle-ramp(inner zone,outer zone,microbial mounds,and shoal)and outer ramp-basins.By cha-racterizing the spatiotemporal distribution of sedimentary facies within the isochronous stratigraphic framework,an internal depression and distally steepening carbonate ramp model was established.The high-energy mound and shoal facies deposits with high-quality reservoirs are mainly affected by the original paleogeomorphy and fluctuation of relative sea level.The middle-ramp shoals are developed in Tazhong area,the middle-ramp mounds and shoals are developed in Bachu area and Keping area,and the middle-ramp shoals are developed in the high paleogeomorphy of Lunnan area.关键词
塔里木盆地/下寒武统/肖尔布拉克组/层序地层框架/沉积相/沉积模式Key words
Tarim Basin/Lower Cambrian/Xiaoerbulake Formation/sequence stratigraphic framework/sedimentary facies/sedimentary model引用本文复制引用
何卿,石开波,吴淳,刘波,刘永立,李俊,白翔宇..塔里木盆地下寒武统肖尔布拉克组沉积相特征及沉积模式[J].北京大学学报（自然科学版）,2025,61(5):902-914,13.基金项目
中国石化西北油田分公司勘探开发研究院协作项目(KY2022-034)资助 （KY2022-034）
