摘要:通过断裂分析及构造演化，并结合油气地化指标，综合研究认为，哈得逊油气的总体运移特征为“多期充注，晚期成藏”，即有垂向又有横向。海西末期—喜山期主干断层继承性活动，形成断穿石炭系底部的复活断层及伴生断层，沟通寒武系、奥陶系油源。晚加里东期、晚海西期来自寒武—奥陶系的油气沿羊屋2 井区深大断裂纵向运移，哈得逊石炭系整体南倾，未发育有效圈闭，两期油气均未有效成藏。晚喜山期受南北向造山运动影响，石炭系地层发生翘倾作用，形成有效圈闭。同时，古生界的深大油源断裂复活，聚集在奥陶系古油藏中的油气沿断裂垂向调整至石炭系东河砂岩，并在北倾斜坡的背景下，油气自北向南短距离侧向运移，聚集于哈得逊石炭系圈闭中，形成现今哈得逊油藏。
关键词: 哈得逊油田/
东河砂岩/
油源断裂/
垂向运移
Abstract:Through the fracture analysis and tectonic evolution, and combined with hydrocarbon geochemical indicators, comprehensive research conclude that the integral migration characteristics of Hudson oil and gas is “multi-stage migration and late stage accumulation”, involving vertical and horizontal. During terminal Hercynian and Himalayan period, the successional growth of main faults derived revival faults and sub faults cutting through the bottom of Carboniferous system. Underneath the Carboniferous gypsum stratum, there are basement-involved faults cutting through the Cambrian-Ordovician oil source. Late Caledonian and Late Hercynian period, the oil and gas coming from the Cambrian-Ordovician migrated vertically along Yangwu 2 well field. Then Hudson Carboniferous inclined southward wholly, without effective traps developed, two stages of oil and gas did not accumulate effectively. Owing to the orogenic movement of the late Himalayan period, the Carboniferous strata emerged southward to northward tectonic reverse, forming effective traps. In addition, thanks to the revival of the Paleozoic deep oil source faults, the oil and gas gathered in the Ordovician reservoir migrated vertically to the Carboniferous Donghe sandstone along the revival faults. Under the northward slope background, the oil and gas laterally migrated from north to south with a short distance and accumulated in Carboniferous traps, forming the nowadays Hudson reservoir.
Key words:Hudson/
Donghe sandstone/
Oil-migrating fault/
Vertical migration
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