石油勘探与开发2026，Vol.53Issue(4)：849-862,14.DOI:10.11698/PED.20250586
四川盆地二叠系龙潭组—三叠系飞仙关组天文旋回格架及碳酸盐台地演化
Astronomical cycle framework and carbonate platform evolution of Permian Longtan Formation-Triassic Feixianguan Formation in Sichuan Basin,SW China
摘要
Abstract
Based on data from cores,well logs,seismic profiles,and carbon isotopic compositions,this study constrains the chronostratigraphic framework using carbon isotopic excursion events and applies cyclostratigraphic methods to establish a high-resolution isochronous stratigraphic framework for the Permian Longtan Formation-Triassic Feixianguan Formation in the Sichuan Basin.Through single-well sedimentary evolution analysis and well-seismic integration,the sedimentary characteristics and the patterns and petroleum geologic significance of carbonate platform evolution during the deposition of the Longtan Formation-Feixianguan Formation are systematically revealed.The results show that the Longtan Formation-Feixianguan Formation exhibits 19 to 22 long eccentricity cycles across the entire basin.The difference in cycle counts is attributed to the significant local absence of the top part of the Permian Changxing Formation.Sedimentation rates gradually increase from the southwest to the northeast of the basin.The sedimentary system is overall controlled by a"high productivity,high supply"background,and jointly influenced by sea-level changes and terrigenous input.The Changxing Formation shows progradational ramp characteristics locally,while the Longtan Formation-Feixianguan Formation presents a carbonate ramp sedimentary model.The"tectonics-climate-astronomy"multi-level synergistic driving mechanism governed carbonate platform development,the regional tectonic setting established the macro-paleogeographic framework and accommodation space configuration for carbonate platform development,while the rhythmic sedimentary infilling and the production intensity of carbonate factories were significantly modulated by paleoclimate and astronomical orbital signals.The three factors exhibited stage-wise synergistic evolution in time and space,collectively driving the formation,development,and demise of carbonate platforms.This study provides a new sedimentary model and basis for an in-depth understanding of sedimentary characteristics and carbonate platform evolution patterns during the Permian-Triassic transition in the Sichuan Basin.关键词
四川盆地/旋回地层/二叠系长兴组/二叠系龙潭组/三叠系飞仙关组/碳酸盐台地/沉积演化/构造-气候-天文耦合驱动Key words
Sichuan Basin/cyclostratigraphy/Permian Changxing Formation/Permian Longtan Formation/Triassic Feixianguan Formation/carbonate platform/sedimentary evolution/tectonics-climate-astronomy coupled driving分类
能源科技引用本文复制引用
石书缘,武赛军,吴嘉彬,胡素云,张建国,姜华,孔凡志,刘伟,云建兵,孟昊..四川盆地二叠系龙潭组—三叠系飞仙关组天文旋回格架及碳酸盐台地演化[J].石油勘探与开发,2026,53(4):849-862,14.基金项目
中国石油天然气股份有限公司科技重大专项"叠合盆地中下组合油气成藏与保持机制研究"(2023ZZ02) （2023ZZ02）
中国石油天然气股份有限公司科技项目"重点含油气盆地整体研究与战略选区评价"(2025YQXN202) （2025YQXN202）
