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首页> 外文期刊>Seismological research letters >The Ambient Seismic Field at Groningen Gas Field: An Overview from the Surface to Reservoir Depth
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The Ambient Seismic Field at Groningen Gas Field: An Overview from the Surface to Reservoir Depth

机译：格罗宁根气田的环境地震场：从表面到水库深度的概述

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摘要

The long-term exploitation of the Groningen gas field led to compaction at reservoir depth, subsequent ground subsidence, and recently earthquakes. As part of an ongoing effort to quantify the hazard and risk in the region, several permanent and temporary seismic arrays have been deployed. As a result, the Groningen area is one of the seismologically best-instrumented areas worldwide. In this article, we describe several seismic experiments that were conducted in the region and take advantage of the numerous possibilities they offer to characterize the ambient seismic wavefield at the surface, in the shallow subsurface, and at reservoir depth. By means of beamforming, analysis of cross-correlation functions, surface-wave eigenfunction analysis, and correlations of neighboring frequencies, we are able to determine the main characteristics of the ambient seismic field (ASF), including the predominant propagation modes and phases. We retrieve clear multimode Rayleigh and Love waves, as well as and P waves, from cross correlations of the ASF. At reservoir depth, we show that the wavefield is largely trapped and reflected between geologic boundaries above and below the reservoir. This article reviews the characteristics of ASF observations with the goal of guiding future investigations of shallow structure of the Groningen area.
机译：Groningen气体领域的长期开发LED以压实储层深度，随后的地下沉降和最近地震。作为量化该地区危害和风险的持续努力的一部分，已经部署了几个永久性和临时地震阵列。因此，格罗宁根面积是全球地震性最佳仪器的领域之一。在本文中，我们描述了在该地区进行的几个地震实验，并利用了他们提供的许多可能性，以在浅地下表面和储存深度处表征表面的环境地震波场。通过波束成形，互相关函数分析，表面波特征函数分析和相邻频率的相关性，我们能够确定环境地震场（ASF）的主要特征，包括主要传播模式和相位。我们从ASF的交叉相关来检索清晰的多模瑞利和爱情波浪，以及P波。在储库深度，我们表明波场基本上被捕获并反映在储存器上方和下方的地质边界之间。本文审查了ASF观察的特点，以指导Groningen地区的浅层结构的未来调查。

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  • 来源
    《Seismological research letters》 |2018年第4期|共17页
  • 作者

    Spica Zack J.; Nakata Nori; Liu Xin; Campman Xander; Tang Zijian; Beroza Gregory C.;

  • 作者单位

    Stanford Univ Dept Geophys 397 Panama Mall Stanford CA 94305 USA;

    Univ Oklahoma ConocoPhillips Sch Geol &

    Geophys Norman OK 73019 USA;

    Stanford Univ Dept Geophys 397 Panama Mall Stanford CA 94305 USA;

    Shell Global Solut Int BV Amsterdam Netherlands;

    Shell Global Solut Int BV Amsterdam Netherlands;

    Stanford Univ Dept Geophys 397 Panama Mall Stanford CA 94305 USA;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 地震学;
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