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首页> 外文期刊>AAPG Bulletin >A three-dimensional insight into the Mackenzie Basin(Canada):Implications for the thermal history and hydrocarbon generation potential of Tertiary deltaic sequences
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A three-dimensional insight into the Mackenzie Basin(Canada):Implications for the thermal history and hydrocarbon generation potential of Tertiary deltaic sequences

机译：麦肯奇盆地（加拿大）的三维视角：对第三纪三角洲层序的热历史和生烃潜力的启示

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摘要

The stratal architecture of the Mackenzie Basin was reconstructed based on seismic and well data and used to define a three-dimensional model to reconstruct the so-far poorly known thermal and matu-.ration history of the basin.To correctly account for the complex tectonic history of the Mackenzie Basin,episodes of uplift and erosion were implemented based on interpretations of original depo-sitional surfaces.Our results indicate that the combined effects of basin inversion and low surface temperatures inhibited maturation from the late Miocene forward in all except the most deeply buried parts of the basin.This explains why upper Eocene and younger deposits are mostly immature despite their burial to more than 5000 m(16,400 ft).The specific history of the basin is shown to control the time intervals of potential hydrocarbon generation.Predictions of transformation ratios using a variety of published kinetics to account for source rock kinetic variability indicate that potential generation from Paleocene and older strata occurred mainly before the late Oligocene.The generation from Eocene strata,however,occurred mainly during the Miocene and,therefore,is interpreted to be a source for Oligocene and younger gas-rich reservoirs.These findings contribute to a better understanding of hydrocarbon systems in the Mackenzie Basin and are the basis for future studies of hydrocarbon migration and accumulation.
机译：Mackenzie盆地的地层结构是根据地震和井数据重建的，并用于定义三维模型以重建迄今鲜为人知的该盆地的热和成熟史。正确地解释了复杂的构造Mackenzie盆地的历史，根据原始沉积面的解释实施了隆起和侵蚀的过程。我们的结果表明，盆地逆转和低地表温度的共同作用抑制了中新世晚期以来的成熟，除了最深处这说明了为何始新世和较年轻的沉积物虽然埋藏在5000 m（16,400 ft）以上，但大多不成熟，但该盆地的特定历史记录可控制潜在的生烃时间间隔。使用各种已公开的动力学来解释烃源岩动力学变化的转化率表明潜在的成因来自古新世和较老地层的离子主要发生在渐新世晚期之前。然而，始新世地层的生成主要发生在中新世期间，因此被解释为渐新世和较年轻的富气储层的来源。更好地了解Mackenzie盆地的油气系统，是未来油气运移和聚集研究的基础。

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