Computerized geophysical tomography
Computerized geophysical tomography
复制标题
DOI：
10.1109/proc.1979.11390
复制
发表时间：
1979-07
影响因子：
20.6
通讯作者：
K. Dines;R. Lytle
中科院分区：
文献类型：
--
作者：
K. Dines;R. Lytle
在地球物理勘探中，计算机层析成像被用作一种辅助手段。利用该方法，可以重建井眼间区域的详细电磁特性图像。衰减或传播速度的空间分布由沿钻孔之间的平面中的射线的线积分沿着计算，并显示为数字图像。原则上，只要地震资料服从线积分模型，也可以用这种方法分析其传播。迭代求解技术，类似于那些在医学X射线断层扫描中使用的应用，以解决大型的线性方程组的线积分数据和远程观测。井眼间能量传播采用直线射线光学模型。使用计算机生成的数据的重建算法的性能进行了演示，然后将其应用于连续波电磁传输探测收集的实验数据。实验衰减重建提出了一个建议的地下城市轨道交通网站。利用这些方法可以显示横向和垂直变化。
Computerized tomography is used as an aid in geophysical exploration. With this method, detailed pictures of electromagnetic properties in the regions between pairs of boreholes can be reconstructed. The spatial distribution of attenuation or propagation velocity is calculated from line integrals along rays in the plane between boreholes, and displayed as a digital picture. In principle, the transmission of seismic data can also be analyzed by this method as long as it obeys the line integral model. Iterative solution techniques, similar to those used in medical X-ray tomography are applied to solve the large sets of linear equations relating the line integral data and the remote observables. A straight-line ray optics model was used for energy propagation between boreholes. The performance of the reconstruction algorithm is demonstrated using computer-generated data and it is then applied to experimental data collected by continuous-wave electromagnetic transmission probing. Experimental attenuation reconstructions are presented of a proposed underground urban mass-transit site. Both lateral and vertical variations are displayed using these methods.