Controlled-source Elastic Interferometric Imaging By Multi-dimensional Deconvolution With Downhole Receivers Below a Complex Overburden
Controlled-source Elastic Interferometric Imaging By Multi-dimensional Deconvolution With Downhole Receivers Below a Complex Overburden
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利用复杂覆盖层下方的井下接收器进行多维解卷积的受控源弹性干涉成像
DOI：
10.1190/1.3513687
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发表时间：
2010
期刊：
影响因子：
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通讯作者：
K. Mehta
中科院分区：
文献类型：
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作者：
J. Neut;J. Thorbecke;K. Wapenaar;K. Mehta
最近，已经出现了各种基于互相关的方法，以将来自地球表面的源位置重定基准到井下接收器位置。通过将接收器放置在复杂覆盖层下方的水平井或斜井中，并将它们变成虚拟源，可以获得精确的成像，而不需要近地下的速度模型。基本理论是基于假设照明是各向同性的虚拟源位置。如果不满足该假设，则虚拟源可能散焦，伪伪影可能进入检索的道集，并且真实振幅通常不被保留。校正散焦的一种方法是用多维去卷积代替互相关。这个过程涉及更多，并且在所需的矩阵求逆期间可能发生不稳定性。我们表明，如果弹性多维反褶积后进行偏移，许多伪影不稳定的反演干扰破坏性和良好的聚焦图像可以得到。
Recently, various cross-correlation based methods have emerged to redatum source locations from the earth’s surface to downhole receiver locations. By placing receivers in a horizontal or deviated well below a complex overburden and turning them into virtual sources, accurate imaging can be obtained without requiring a velocity model of the near subsurface. The underlying theory is based on the assumption that illumination is isotropic at the virtual source location. If this assumption is not fulfilled, virtual sources can be de-focused, spurious artifacts can enter the retrieved gathers and true amplitudes are generally not preserved. One way to correct for de-focusing is to replace cross-correlation with multi-dimensional deconvolution. This procedure is more involved and instabilities can occur during the required matrix inversions. We show that if elastic multi-dimensional deconvolution is followed by migration, many artifacts from instable inversion interfere destructively and well focused images can be obtained.
使用奇异值分解的多维反褶积解释源接收器配置对地震干涉测量的影响
DOI：
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发表时间：
2011
期刊：
影响因子：
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作者：
Kaneko;T.;Tomonaga;M;湊翔平;湊翔平
通讯作者：
湊翔平
多维反褶积地震干涉奇异值分解分析
DOI：
--
发表时间：
2011
期刊：
影响因子：
--
作者：
Kaneko;T.;Tomonaga;M;湊翔平;湊翔平;湊翔平
通讯作者：
湊翔平