Spatial resolution of diffraction tomography
Spatial resolution of diffraction tomography
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DOI：
10.1121/1.417967
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发表时间：
1997
影响因子：
2.4
通讯作者：
T. Dickens;G. A. Winbow
中科院分区：
文献类型：
--
作者：
T. Dickens;G. A. Winbow
绕射层析成像是一种适用于井间地震资料的成像技术，其目的是在远离井眼的地方获得最佳的空间分辨率。原则上，该方法可以形成相当于将声波测井从井筒延伸到地层中的声波成像，其空间分辨率小于用于采集井间数据的辐射的一个波长。本文报道了衍射层析成像从有限视角数据中获得简单目标的高分辨率重建的能力。其目标是量化具有真实源-接收器几何形状的衍射层析成像的分辨率和速度重建能力。这项研究使用了简单的目标(圆盘和低对比度的层序列)。这些目标的散射可以在没有近似的情况下计算，这使得它们成为算法的理想测试用例。对于S来说，衍射层析成像的分辨率被确定为一个波长的数量级。
Diffraction tomography is an imaging technique applicable to crosshole seismic data and aimed at achieving optimal spatial resolution away from the borehole. In principle the method can form acoustic images equivalent to extending acoustic well logs away from the wellbore and into the formation with a spatial resolution less than one wavelength of the radiation employed to gather the crosshole data. This paper reports on the capability of diffraction tomography to produce high-resolution reconstructions of simple targets from limited-view-angle data. The goal is to quantify the resolution and velocity-reconstruction capability of diffraction tomography with realistic source–receiver geometries. Simple targets (disks and low-contrast sequences of layers) are used for this study. The scattering from these targets can be calculated without approximation, making them ideal test cases for the algorithm. The resolution capability of diffraction tomography is determined to be on the order of one wavelength for s...