Deep sea channel influence on wave field energy propagation
Han Fuxing1, Sun Jianguo1, Wang Kun2
1. College for Geoexploration Science Technology, Laboratory for Wave Theory and Imaging Technology, Jilin University, Changchun, Jilin 130026, China; 2. Jilin Communications Polytechnic, Changchun, Jilin 130012, China
Abstract：As acoustic waveguides in certain deep waters, deep sea channels often cause seawater velocity in a layered structure distribution, and cause changes of ray path, travel time and amplitude in the wave field propagation, and these influences are varying with wave propagation distance. All these affect migration imaging in the data processing stage. In order to study the influence of water velocity on the seismic migration, we establish a velocity model of deep channel and a velocity model of sea water. Using wavefront construction method we calculate wave travel time, ray path and amplitude on both of the models. We compare the calculation results and migration imaging results of two models, and find out the influence of deep sea channel on wave field propagation. The following understandings are obtained: ①the influence of the deep channel on ray path in seismic data processing is not negligible; ②its influence on travel time can be ignored; and ③its influence on amplitude is very strong.
韩复兴, 孙建国, 王坤. 深海声道对波场传播的影响[J]. 石油地球物理勘探, 2014, 49(3): 444-450,467.
Han Fuxing, Sun Jianguo, Wang Kun. Deep sea channel influence on wave field energy propagation. OGP, 2014, 49(3): 444-450,467.
