Fluid flow impact on slope failure from 3D seismic data:: a case study in the Storegga Slide
Fluid flow impact on slope failure from 3D seismic data:: a case study in the Storegga Slide
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DOI：
10.1111/j.1365-2117.2005.00256.x
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发表时间：
2005-03-01
期刊：
影响因子：
3.2
通讯作者：
Berg, K
中科院分区：
文献类型：
--
作者：
Bünz, S;Mienert, J;Berg, K
分析三维（3D）地震数据从端墙地区的Storegga幻灯片中挪威的边缘提供了新的见解埋块运动及其故障机制。这些块体运动位于Ormen Lange穹隆之上，这是一个第三纪穹隆结构，拥有一个大型天然气储层。斜坡不稳定性早在上新世-更新世冰期-间冰期旋回开始时就发生了。三维地震数据提供了天然气从储层泄漏并向上迁移到浅地圈的地球物理证据。气体含量增加的沉积物可能在滑动活动过程中液化，并显示出与气体含量较少的沉积物不同的流动机制。在没有天然气证据的地区，沉积物保持完整。这种稳定性由上覆岩层继承。浅层地下天然气的分布（
Analysis of three-dimensional (3D) seismic data from the headwall area of the Storegga Slide on the mid-Norwegian margin provides new insights into buried mass movements and their failure mechanisms. These mass movements are located above the Ormen Lange dome, a Tertiary dome structure, which hosts a large gas reservoir. Slope instabilities occurred as early as the start of the Plio-Pleistocene glacial-interglacial cycles. The 3D seismic data provide geophysical evidence for gas that leaks from the reservoir and migrates upward into the shallow geosphere. Sediments with increased gas content might have liquefied during mobilization of the sliding and show different flow mechanisms than sediments containing less gas. In areas where there is no evidence for gas, the sediments remained intact. This stability is inherited by overlying strata. The distribution of gas in the shallow subsurface (