The fast imaging method of elastic waves generally uses the reflected P and S waves in the detector wave field for imaging.During the imaging process,due to the participation of wave fields in all directions,interference noise is generated in the imaging profile,which affects the imaging quality.To solve this problem,an improvement was made on the PS wave imaging method of the detector wavefield.An amplitude preserving wavefield separation method was used to separate the elastic wavefield,obtaining amplitude preserving P-waves and S-waves.Then,the wavefields propagating in different directions were separated,and the improved converted wave imaging conditions for directional traveling waves were used for imaging.During the imaging process,only the wavefields with the same propagation direction were used for cross-correlation imaging,avoid the influence of wave fields in other propagation directions.The results indicate that the elastic wave imaging method has higher imaging accuracy.
关键词
弹性波/波场分离/方向行波/转换波
Key words
elastic wave/wave field separation/directional wave/converted wave
维普
万方数据