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首页> 外文期刊>AAPG Bulletin >Post-breakup compression of a passive margin and its impact on hydrocarbon prospectivity: An example from the Tertiary of the Faeroe-Shetland Basin, United Kingdom
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Post-breakup compression of a passive margin and its impact on hydrocarbon prospectivity: An example from the Tertiary of the Faeroe-Shetland Basin, United Kingdom

机译：被动边缘的破裂后压缩及其对油气远景的影响：以英国Faeroe-Shetland盆地第三纪为例

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The Faeroe–Shetland Basin is part of a passive continental margin that formed as a result of multiphase extension associated with North Atlantic rifting during the Mesozoic and Paleocene. Breakup was followed by postrift subsidence during the latest Paleocene to late Eocene and the development of at least three 70–150-km (43–93-mi)-long, broadly north-south–orientated, slope canyons and linked terminal fans during the middle Eocene. The terminal fans filled northeast-southwest–striking basin-floor bathymetric depressions that had formed above the hanging walls of underlying, dormant northeast-southwest–trending Mesozoic extensional faults and adjacent half-graben depocenters. Compression during the middle and late Miocene caused contractional reactivation of the Mesozoic extensional faults and folding of the overlying uppermost Paleocene to middle Miocene postrift sediments into a series of 17 northeast-southwest–striking anticlinal domes. The switch from hanging-wall bathymetric depression during terminal fan deposition to anticlinal domal high during and after the middle to late Miocene compression has led to the present-day spatial coincidence of a potential hydrocarbon reservoir and an effective trap. The anticlines also acted as the foci for gas migration during or after compression (15 Ma to present). However, the timing of compression and differential uplift of the basin margins during the past 15 m.y., approximately 45 m.y. after the main phase of oil migration, may be a critical negative factor for oil exploration in this part of the basin. This hydrocarbon phase may have spilled during the structural reorganization, either updip into shallower traps or out of the hydrocarbon system via seeps.
机译：Faeroe-Shetland盆地是被动大陆边缘的一部分，该大陆边缘是中生代和古新世期间与北大西洋裂谷相关的多相扩展与 形成的。 sup>破裂后，在最近的 古新世至晚始新世期间发生裂陷沉陷，并至少发育了三个 70-150 km（43-93-mi） ，在始新世中期，大体为南北向的 斜坡峡谷和相连的终端扇。 终端扇充满了东北-西南走向的 盆地在潜伏的东北-西南-趋势 中生代伸展断裂和相邻的半grab沉积中心的 悬挂壁上方形成的底测深坑。 中新世中期和晚期的压缩导致中生代伸展断裂的收缩 再活化和上覆的上新世至中层的折叠 中新世后裂 将沉积物分成一系列由东北-西南走向的 斜背穹顶组成的系列。在中新世压缩期间和中新世晚期之后，从末扇沉积期间的壁挂式测深压低 切换到了背斜穹顶高，导致了 潜在的碳氢化合物 储层与有效圈闭的当今空间重合。背斜还充当压缩过程中或压缩后（目前为15 Ma ）气体迁移的焦点。但是，在过去15 m.y.，大约 45 m.y期间，盆地边缘的压缩和差异 抬升的时机。在石油运移的主要阶段之后，可能是该盆地该地区石油勘探的关键 负因素。 该烃相可能在构造期间已经溢出重组，要么向上渗入较浅的圈闭中，要么通过渗流从烃类系统中脱离。

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  • 来源
    《AAPG Bulletin》 |2004年第1期|00000001-00000020|共20页
  • 作者

    Richard Davies; Ian Cloke; Joe Cartwright; Andrew Robinson; Charles Ferrero;

  • 作者单位

    3DLab, School of Earth, Ocean and Planetary Sciences, Cardiff University, Main Building, Park Place, Cardiff, CF10 3YE, United KingdomRichard.Davies@earth.cf.ac.uk;

    ExxonMobil Production Company, 396 West Greens Road, Houston, Texas, 77060Ian.Cloke@ExxonMobil.com;

    3DLab, School of Earth, Ocean and Planetary Sciences, Cardiff University, Main Building, Park Place, Cardiff, CF10 3YE, United Kingdom;

    3DLab, School of Earth, Ocean and Planetary Sciences, Cardiff University, Main Building, Park Place, Cardiff, CF10 3YE, United Kingdom;

    ABN Amro, 250 Bishopsgate, London EC2M 4AA, United Kingdom;

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