特种油气藏2025，Vol.32Issue(3)：26-34,9.DOI:10.3969/j.issn.1006-6535.2025.03.004
渤海湾盆地辽河坳陷东部沙三段煤成油地质特征与资源潜力
Geological characteristics and resource potential of coal-derived oil in the third member of Shahejie Formation in the eastern sag of Liaohe Depression,Bohai Bay Basin
摘要
Abstract
The cause and source of high-wax crude oil in the third member of Shahejie Formation in the eastern sag of Liaohe Depression,as well as its exploration potential,remain unclear.Through comprehensive analysis of the coal-forming environment,coal-measure hydrocarbon source rock indices,and crude oil geochemical features of the upper sub-member of the third member of Shahejie Formation in the eastern sag,the source-reservoir configu-ration and hydrocarbon-generating potential were assessed,which clarified the main controlling factors for coal-de-rived oil accumulation.The study shows that the upper sub-member of the third member of Shahejie Formation in the eastern sag is a period of fault-depression transition,in which the lake basin gradually silts and fills up under the background of stable tectonics,forming a large area of floodplain deposits;the coal-measure stratum is stably developed,and the coal-measure hydrocarbon source rocks are rich in chitin groups and desmocollinite,which have strong oil-generating capacity.The main controlling factors for coal-derived oil accumulation are the large thickness of coal-measure hydrocarbon source rocks in coal accumulation centers,the development of fracture transport systems in tectonically deformed zones,and the close and direct configuration of coal and sand.The coal-measure strata of the upper sub-member of the third member of Shahejie Formation in the eastern sag can generate oil,with a total coal-derived oil resource of 0.8×108 t.This finding has led to exploration discoveries,expanded new source rock series,and offers significant reference for exploring coal-measure strata in the Liaohe Depression and the entire Bohai Bay Basin.关键词
煤成油/生物标志物/主控因素/沙三上亚段/东部凹陷/渤海湾盆地Key words
coal-derived oil/biomarkers/main controlling factors/upper sub-member of the third member of Shahejie Formation/eastern sag/Bohai Bay Basin分类
能源科技引用本文复制引用
于雪峰,于福生,郭强,黄双泉..渤海湾盆地辽河坳陷东部沙三段煤成油地质特征与资源潜力[J].特种油气藏,2025,32(3):26-34,9.基金项目
国家自然科学基金"负反转构造成因演化主控因素物理模拟和离散元数值模拟"(42072144) （42072144）
