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Exhumed hydrocarbon traps in East Greenland: A comment on Andrews et al. (2019)
Basin Research ( IF 3.2 ) Pub Date : 2020-06-28 , DOI: 10.1111/bre.12463
Flemming G. Christiansen 1 , Jørgen A. Bojesen‐Koefoed 1 , Stefan Piasecki 1, 2 , Lars Stemmerik 1 , Jens Therkelsen 3
Affiliation  

Abstract In a recent study, Andrews et al. (2020) describe “exhumed hydrocarbon traps” in North‐East Greenland. The basic premise for their interpretation is that dark‐coloured, pyrobitumen‐bearing sandstones represent the remnants of once buried petroleum reservoirs. We do not see the necessary field or analytical evidence to support a model that has strong implications for resource evaluations. Andrews et al. (2020) have not considered previous published information on diagenetic and thermal maturity history of the area. A more probable model would include the intrusion of dykes and sills into a sedimentary succession with immature petroleum source rocks and reservoir‐quality sandstones. The heating caused rapid generation of petroleum components and local hydrothermal circulation systems in adjacent porous sandstones. Any petroleum was rapidly destroyed leaving essentially only black grain‐coatings and minor particles of pyrobitumen—essentially in one short‐lived continuous process. The existence of new plays in the North Atlantic as proposed by Andrews et al. (2020) is in our opinion not substantiated as this requires analytical data from unaltered oils from the less mature parts of the sedimentary succession and considerations of thermal maturity and basin evolution. To draw conclusions that have a serious impact on resource evaluations based on the dark colouration of sandstones without comprehensive analytical data is, in our opinion, ill advised.

中文翻译:

东格陵兰挖掘出的油气圈闭:对 Andrews 等人的评论。(2019)

摘要在最近的一项研究中,安德鲁斯等人。(2020) 描述了格陵兰岛东北部的“挖掘出的碳氢化合物圈闭”。他们解释的基本前提是深色、含焦沥青的砂岩代表曾经埋藏的石油储层的残余物。我们没有看到必要的现场或分析证据来支持对资源评估具有重大影响的模型。安德鲁斯等人。(2020) 没有考虑先前公布的关于该地区成岩和热成熟历史的信息。一个更可能的模型将包括岩脉和基岩侵入具有未成熟石油烃源岩和储层质量砂岩的沉积层序。加热导致相邻多孔砂岩中石油组分和局部热液循环系统的快速生成。任何石油都被迅速破坏,基本上只留下黑色颗粒涂层和微量焦沥青颗粒——基本上是在一个短命的连续过程中。Andrews 等人提出的北大西洋新区的存在。(2020) 在我们看来没有得到证实,因为这需要来自沉积层序中不太成熟的部分的未改变石油的分析数据以及热成熟度和盆地演化的考虑。我们认为,在没有综合分析数据的情况下,根据砂岩的深色得出对资源评估有严重影响的结论是不明智的。Andrews 等人提出的北大西洋新区的存在。(2020) 在我们看来没有得到证实,因为这需要来自沉积层序中不太成熟的部分的未改变石油的分析数据以及热成熟度和盆地演化的考虑。我们认为,在没有综合分析数据的情况下,根据砂岩的深色得出对资源评估有严重影响的结论是不明智的。Andrews 等人提出的北大西洋新区的存在。(2020) 在我们看来没有得到证实,因为这需要来自沉积层序中不太成熟的部分的未改变石油的分析数据以及热成熟度和盆地演化的考虑。我们认为,在没有综合分析数据的情况下,根据砂岩的深色得出对资源评估有严重影响的结论是不明智的。
更新日期:2020-06-28
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