Waveform Migration of Scattering Seismic Data
The main method used to obtain images of underground media is the migration of seismic data at present.At this stage the concept of the seismic data migration method we mainly use is based on the assumption that seismic waves generate reflected waves at the velocity interface.In the process of seismic wave propagation, however, the interaction between incident wave and subsurface medium does not simply generate reflected wave.For an inhomogeneous subsurface body with a small scale, the incident wave will generate scattered wave.But, the current seismic migration method does not distinguish these two waves.Since the characteristics and the propagation process of these two waves are different, the result of migration imaging based on reflection concept is not suitable for scattering wave migration imaging.Moreover, the seismic migration imaging results obtained using Claerbout imaging formula can show the underground structure to a certain extent, but there is an error in phase, which leads to inaccurate imaging positions.The reason is that Claerbout imaging formula has restrictions on the conditions of applications, and the waveform information is ignored during imaging.To solve the problems, we construct a linear inversion problem based on the forward propagation equations of scattered waves for the subsurface structures that generate scattered waves, and get the migration imaging theory with scattering waveform information.
Seismic data migration scattered wave reflected wave Claerbout imaging formula scattering waveform migration
Fangzheng Lu Shengchang Chen
School of Earth Sciences, Zhejiang University, Hangzhou, PRC
国际会议
杭州
英文
68-74
2018-06-10（万方平台首次上网日期，不代表论文的发表时间）