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North Alaska Super Basin: Petroleum systems of the central Alaskan North Slope, United States
AAPG Bulletin ( IF 2.7 ) Pub Date : 2021-06-09 , DOI: 10.1306/01282120057
W. Dallam Masterson , Albert G. Holba

North Alaska Super Basin oil fields have produced more than 18 billion bbl of oil with at least 5 billion bbl remaining in existing fields, and estimated yet-to-find resources exceed 10 billion bbl in three prolific petroleum systems. Since discovery of the two largest United States conventional oil fields at Prudhoe Bay and Kuparuk River in the 1960s, technological advancements including three-dimensional seismic data with amplitude vs. offset analysis, horizontal and extended reach drilling, and identification of source rocks for light oils have enabled new discoveries including Willow and Pikka. Oil in the Prudhoe Bay field is interpreted as a mixture cosourced by lateral migration from Triassic Shublik Formation shale and carbonate, Lower Cretaceous highly radioactive zone (HRZ) shale, and Lower Jurassic Kingak Shale. The bulk properties of Prudhoe Bay main field oils are consistent with the modeled oil composition expelled within the fetch area, and the presence or quality of carrier beds apparently did not affect oil migration efficiency. The Shublik Formation is interpreted as the oil source for Kuparuk River field, the HRZ shale is interpreted as the oil source for Tarn field, and the Kingak Shale is interpreted as the oil source for Alpine field. Point McIntyre field is interpreted as sourced by the same three source rocks as Prudhoe Bay field, and Fiord field is interpreted as cosourced from Shublik and Kingak. West Sak field is interpreted as a mixture of moderately biodegraded oil that spilled from the Prudhoe Bay field and lightly biodegraded condensate that leaked from the underlying Kuparuk River field.

中文翻译:

北阿拉斯加超级盆地:美国阿拉斯加北坡中部的石油系统

北阿拉斯加超级盆地油田已生产超过 180 亿桶石油,现有油田至少剩余 50 亿桶,估计在三个多产的石油系统中尚未发现的资源量超过 100 亿桶。自 1960 年代在普拉德霍湾和库帕鲁克河发现美国最大的两个常规油田以来,技术进步,包括具有振幅与偏移分析的三维地震数据、水平和大位移钻井以及识别轻油的烃源岩促成了包括 Willow 和 Pikka 在内的新发现。Prudhoe Bay 油田的石油被解释为由三叠纪 Shublik 组页岩和碳酸盐、下白垩统高放射性带 (HRZ) 页岩和下侏罗统 Kingak 页岩的侧向迁移共同来源的混合物。普拉德霍湾主要油田油的整体性质与在取区内排出的模拟石油成分一致,并且载体床的存在或质量显然不影响石油运移效率。Shublik 组解释为 Kuparuk River 油田的油源,HRZ 页岩解释为 Tarn 油田的油源,Kingak 页岩解释为 Alpine 油田的油源。Point McIntyre 油田被解释为与 Prudhoe Bay 油田相同的三个烃源岩,而 Fiord 油田被解释为来自 Shublik 和 Kingak 油田。West Sak 油田被解释为从 Prudhoe Bay 油田溢出的中等生物降解油和从底层 Kuparuk River 油田泄漏的轻度生物降解凝析油的混合物。
更新日期:2021-06-17
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