特种油气藏2024，Vol.31Issue(3)：45-51,7.DOI:10.3969/j.issn.1006-6535.2024.03.006
松辽盆地敖古拉断裂带构造演化及断控油气聚集机制
Structural Evolution and Fault-controlled Hydrocarbon Accumulation Mechanism of Aogula Fault Zone in Songliao Basin
摘要
Abstract
The Aogula Fault Zone in the Songliao Basin exhibits complex kinematic characteristics,making the study of the spatiotemporal matching relationships of various reservoir-forming controlling factors challenging,which brings challenges to the accurate characterization of reservoir morphology.To address this issue,a comprehensive a-nalysis of geological,seismic interpretation,and drilling data was conducted to understand the structural develop-ment history and fault causes.Based on the understanding of reservoir formation,the mechanisms of fault-con-trolled oil and gas accumulation were clarified.The fault-dense zone in the study area can be divided into two lev-els,and the faults are classified into three types based on their relationship with stratigraphic position.The study reveals that the Aogula Fault Zone is composed of two antithetic"S"-shaped main faults,experiencing three sta-ges:faulting,sagging,and inversion.During the faulting stage,the activity intensity and elongation percentage of the fault zone are the highest,gradually weakening during the sagging stage,accompanied by multiple reverse regu-lating faults,and strengthening again during the inversion stage.Oil-source faults serve as vertical migration path-ways connecting source rocks and traps,controlling the formation of fault-related traps and providing favorable con-ditions for oil and gas migration and accumulation.The research results can provide theoretical support for further exploration targeting and reserve enhancement.关键词
松辽盆地/敖古拉断裂带/构造演化/断控油气Key words
Songliao Basin/Aogula Fault Zone/structural evolution/fault-controlled oil and gas分类
能源科技引用本文复制引用
孙国庆..松辽盆地敖古拉断裂带构造演化及断控油气聚集机制[J].特种油气藏,2024,31(3):45-51,7.基金项目
中国石油重大科技专项"大庆古龙页岩油勘探开发理论与关键技术研究"(2021ZZ10) （2021ZZ10）
