海相油气地质2025，Vol.30Issue(5)：447-456,10.DOI:10.3969/j.issn.1672-9854.2025.05.006
伏尔加—乌拉尔盆地前中生代原型盆地演化与岩相古地理特征
Evolution and lithofacies paleogeographic characteristics of the Pre-Mesozoic prototype basin in Volga-Urals Basin
摘要
Abstract
The Volga-Urals Basin is a typical foreland basin on the Eastern European Platform,accounting for a significant proportion of global conventional and unconventional oil and gas reserves.However,the understanding of its basin formation and reservoir accumulation remains limited.Through systematic investigation of geological data,the evolution of the basin and its lithofacies paleogeographic characteristics are comprehensively analyzed based on the sedimentary filling features during different Pre-Mesozoic geological periods.The results show that:(1)Under the influence of different tectonic stresses such as tensional stress and compressional stress,the Volga Ural Basin underwent tectonic evolutionary stages of extensional and compressional regimes,developing four prototype basin types/stages:intracontinental rift,passive continental margin,back-arc depression,and back-arc foreland basin.(2)During different tectonic evolution processes,the basin has undergone multiple-cycle changes from terrestrial to marine and back to terrestrial.During the Meso-Neoproterozoic,the basin remained generally stable with sedimentation confined to its eastern region,dominated by terrestrial clastic deposits;in the Early Ordovician,the opening of the Ural Ocean led to a marine transgression across the East European Platform,characterized primarily by shallow marine carbonates;beginning in the Devonian,the basin underwent multiple regressive-transgressive cycles;by the end of the Permian,the entire basin was fully uplifted and subjected to erosion.(3)The basin developed four petroleum systems,with the Domanik Formation serving as the primary source rock.The transitional facies and shallow marine facies developed during the transgressive phase constitute two critical hydrocarbon reservoir units in the basin.Muhanovo-Erohovsk Sag and Kashan-Kama Depression are respectively the key area for unconventional and conventional oil and gas exploration in the future.The research findings provide a critical foundation for the evaluation of overseas oil and gas projects and the implementation of exploration and development practices.关键词
原型盆地/岩相古地理/前陆盆地/成藏组合/伏尔加—乌拉尔盆地Key words
prototype basin/lithofacies paleogeography/foreland basin/petroleum systems/Volga-Urals Basin分类
石油、天然气工程引用本文复制引用
冯佳睿,温志新,贺正军,陈轩,孟庆洋,马超,苏玲,汪永华..伏尔加—乌拉尔盆地前中生代原型盆地演化与岩相古地理特征[J].海相油气地质,2025,30(5):447-456,10.基金项目
本文受中国石油天然气股份有限公司油气科技专项课题"非常规油气技术可采资源差异化评价技术研究"(编号:2023ZZ0703)、中国石油天然气股份有限公司前瞻性基础性课题"陆相页岩油差异聚集机理与富集模式研究"(编号:2024DJ87-04)资助 （编号:2023ZZ0703）
