大庆石油地质与开发2026，Vol.45Issue(4)：39-50,12.DOI:10.19597/J.ISSN.1000-3754.202505037
吐哈盆地台北凹陷洼陷区侏罗系断裂特征及控藏作用
Jurassic faults characteristics and the control on hydrocarbon accumulation in sub-sag zones of Taibei Sag in Tuha Basin
摘要
Abstract
Fault system is a key geological factor controlling hydrocarbon accumulation in Shengbei,Qiudong and Xiaocaohu sub-sags of Taibei Sag in Tuha Basin.However,the geometric characteristics,evolutionary process of these fault systems and their control on hydrocarbon accumulation are still unclear,significantly resericting hydro-carbon exploration in Jurassic Taipei Sag.Based on geological and geophysical data,development characteristics and evolution processes of faults in 3 sub-sag zones of Taibei Sag(Shengbei,Qiudong and Xiaocaohu sub-sags)are analyzed through fault structure analysis,fault sealing evaluation and structural fracture prediction techniques,ex-ploring the controlling effect of faults on Jurassic hydrocarbon accumulation.The results show that,Jurassic sub-sag zones in Taibei Sag mainly develop 2 types of fault systems including thrust and strike-slip,with deformation domi-nated by thrust faults and supplemented by strike-slip faults.Regional detachment layers in Xishanyao Formation and Badaowan Formation control the layered deformation of faults in sub-sag zones,with intense deformation above the detachment layers and weak deformation below.Jurassic faults can be divided into Yanshanian active faults,Hi-malayan active faults and long-term active faults.The faults mainly formed during middle Yanshanian period,devel-oped and were finalized during Himalayan period,exhibiting inherited development characteristics.Hydrocarbon accumulation is jointly controlled by fault-caprock configurations and structural fractures.The degree of fault dam-age to caprocks governs hydrocarbon migration and accumulation,while structural fractures significantly improve the pore structure and flow capacity of tight sandstone reservoirs.The research provides guiding significance for un-derstanding hydrocarbon accumulation and further exploration deployment in this area.关键词
断裂特征/控藏作用/台北凹陷/洼陷区/侏罗系/吐哈盆地Key words
fault characteristics/control on hydrocarbon accumulation/Taibei Sag/sub-sag zone/Jurassic/Tuha Basin分类
能源科技引用本文复制引用
陈羽初,张华,于英华,周志超,贾雪丽,李宏伟,胡欣蕾..吐哈盆地台北凹陷洼陷区侏罗系断裂特征及控藏作用[J].大庆石油地质与开发,2026,45(4):39-50,12.基金项目
国家科技重大专项子课题"志留系―中三叠统常规-非常规油气有序分布规律及增储区带评选"(2025ZD1400403) （2025ZD1400403）
黑龙江省自然科学基金项目"富泥三角洲沉积模拟研究"(LH2023D005). （LH2023D005）
