Automatically building the initial velocity model in the seismic crosshole tomography.
Chen Guojin, Gao Zhiling and Wu Yongshuan. Geology and Geophysics Institute of Chinese Academy, Beijing 100101, China
Aim to the initial velocity chose, this method is supposed that the ray from shot to receiver is straight, and the observed traveltimes picked from the seismic sections, the initial velocity model used in the seismic tomography can be calculated. The advantage is not depended on the log data, based on the observed traveltimes completely. The Simultaneous Iterative Reconstruction Technique is utilizes the ray-bending tracing operator based on the Shorted Path Tree. This method is practical by the tomographic results of numeric and physical models. Meanwhile, it is simple and complemented easily, improve the efficacy and stability of tomography algorithm.
【CateGory Index】： P631.4