Transmitted wave traveltime tomography for seawater based on OBS observations
With the continuous development of seismic high-resolution exploration technology,the accuracy requirements for seismic inversion are getting higher.In order to improve the efficiency and accuracy of subsequent processing,it is crucial to get more accurate seawater velocity distribution.However,traditional traveltime tomography methods often have difficulty achieving ideal vertical resolution when using towed-line observation with limited offset,which limits the accuracy of seawater velocity modeling.In this paper,a transmitted wave traveltime tomography method based on OBS observations is proposed.The adjoint-state method of traveltime tomography is used as the inversion tool.This method utilizes the seawater transmission wave traveltime information in the sound pressure component of the OBS observation system to accurately invert the seawater velocity structure.The experimental results of both theoretical model and actual data show that this method can accurately establish a seawater velocity model and improve the imaging quality below the seawater.
万方数据
维普
