石油地质与工程2026，Vol.40Issue(5)：43-49,7.DOI:10.26976/j.cnki.sydz.202605007
南堡2-3地区复杂断块油气差异富集主控因素
Main controlling factors of differential hydrocarbon enrichment in complex fault blocks,Nanpu 2-3 Area
摘要
Abstract
Nanpu 2-3 Block is located in the Nanpu Sag of the Bohai Bay Basin,characterized by complex structures and remarkable disparities in hydrocarbon enrichment among individual fault blocks.To identify the primary controlling factors for such differential enrichment,this study investigates the synergistic reservoir-controlling effects of key geological parameters including the coupling between source rocks and hydrocarbon-transporting faults,fault assemblages,structural relief,fault activity,and lateral sealing capacity,based on seismic,drilling and reserve data.The results indicate that effective temporal and spatial coupling between the high structural positions of Shahejie Formation source rocks and through-source faults serves as the fundamental prerequisite for preferential hydrocarbon charging in the southern and northern fault blocks.Favorable fault assemblages such as braided faults and rhombic pull-apart segments provide multi-path migration pathways for hydrocarbons and form local structural highs.The southern fault block features large structural relief,and its major active faults during the Minghuazhen Formation period possess both efficient migration capacity and strong lateral sealing ability,making it the favorable zone for large-scale hydrocarbon enrichment.In contrast,hydrocarbon enrichment is limited in the northern and western fault blocks due to severely fragmented structures or low structural relief.A hydrocarbon differential accumulation model synergistically governed by four key factors(source rock-fault configuration,fault activity and fault sealing capacity)is established.The findings deepen the understanding of hydrocarbon accumulation mechanisms in complex fault-block reservoirs and provide significant guidance for further exploration deployment in the Nanpu 2-3 Area.关键词
南堡凹陷/复杂断块/差异富集/通源断层/断层活动性Key words
Nanpu Sag/complex fault block/differential enrichment/through-source fault/fault activity分类
能源科技引用本文复制引用
李亮,王九理,王海考,黄鹏,刘奕辰,刘沛沛..南堡2-3地区复杂断块油气差异富集主控因素[J].石油地质与工程,2026,40(5):43-49,7.基金项目
国家自然科学基金(42172154)资助. （42172154）
