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MARINE MULTICOMPONENT SEISMIC - THE NEW ISSUES IN THE DEVELOPING REVOLUTION

机译：海洋多分量地震-不断发展的新问题

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Many reservoirs have been discovered and developed with 'conventional' seismic surveys that use compressional, or P waves, to map the subsurface. However there are many instances where P waves do not adequately image the reservoir such as where the presence of shallow gas disrupts P wave propagation or where sands with low impedance contrast, that are invisible to P waves, are present. One solution is to record shear waves, or S waves, in addition to P waves. Marine multicomponent seismic emerged as a revolutionary concept 7 years ago and was championed in the North Sea for a multitude of applications. Since then over 150 surveys have been acquired, processed and some even interpreted. In addition to improving the seismic image additional benefits of multicomponent seismic can include the measurement of azimuthal anisotropy, eliminating strong water bottom multiples and provide lithology and fluid discrimination. Most surveys have been 2D but recent appreciation of the technique has led to large l000sq km 3D surveys in the Gulf of Mexico and very focused high-resolution 3D surveys in the North Sea. Although the cost of 3D multicomponent is 2 to 20 (twenty) times that of streamer data the emerging commercial viability of this seismic method is driving development of acquisition, processing and interpretation tools and methodologies. Differences in the symmetry of P wave and S wave travel paths require careful survey acquisition geometry design to ensure adequate coverage. Wave mode specific algorithms are used to process the data. Similarly different acquisition geometries require specific processing routines. Azimuthal anisotropy has gained acceptance in exploration and exploitation today. Recent advances in data quality and processing tools to handle anisotropy have made this an enabling technology rather than limiting image resolution.
机译：已经通过“常规”地震勘探发现并开发了许多储层，这些地震勘探使用压缩波或P波绘制地下图。但是，在许多情况下，P波不能对储层进行足够的成像，例如，存在浅层气体会扰乱P波的传播，或者存在P波不可见的低阻抗对比度的砂岩。一种解决方案是记录除P波之外的剪切波或S波。海洋多分量地震是7年前的一个革命性概念，并在北海赢得了广泛的应用。自那时以来，已获取，处理甚至解释了150多项调查。除了改善地震图像外，多分量地震的其他好处还包括：测量方位角各向异性，消除强水底多次波并提供岩性和流体判别力。大多数勘测都是2D的，但最近对该技术的了解导致在墨西哥湾进行了1000平方公里的大型3D勘测，并在北海进行了非常集中的高分辨率3D勘测。尽管3D多分量的成本是流光数据的2到20（二十）倍，但这种地震方法的新兴商业可行性正在推动采集，处理和解释工具及方法的发展。 P波和S波传播路径的对称性差异需要仔细的勘测采集几何设计以确保足够的覆盖范围。波模式特定的算法用于处理数据。同样，不同的采集几何形状需要特定的处理例程。方位各向异性已经在当今的勘探和开发中获得认可。数据质量和处理各向异性的处理工具的最新进展使这项技术成为可行的技术，而不是限制图像分辨率。

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  • 来源
    《》|2002年|p.1-17|共17页
  • 会议地点 Jakarta(IT);Jakarta(IT)
  • 作者

    Jason Robinson;

  • 作者单位

    Western Geco, Malaysia;

  • 会议组织
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 工业经济;
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