Reverse Time Migration Fd Method Top Pseudo Spectral Method We present an explicit finite difference time domain method to solve the lossless westervelt equation for a moving wave emitting boundary in one dimension and in spherical symmetry. We have outlined the principles of reverse time migration or rtm in mapping subsurface reflectivity structures, along with major challenges and solution strategies through reviewing its development history in the past four decades.
Pdf What Is A Pseudo Spectral Method Fourier Derivatives We propose a 3d reverse time migration (rtm) using an hybrid finite difference (fd) pseudospectral algorithm to solve the two way acoustic equation. this mainly consists of forward backward 2d fft in lateral dimensions (x y plane) and 1d fd in the depth dimension. In migration principles, a migration algorithm based on extrapolation back in time while using the stacked section to be the boundary condition at z = 0 was discussed. the impulse response of this algorithm, which is known as reverse time migration, is shown in figure 4.3 21. We present a methodology called a one point wide based minimum boundary saving (mbs) scheme for wavefield reconstruction of pseudo spectral reverse time migration (psrtm). the key mechanism is that just a one point wide boundary has to be saved at the time of wave extrapolation. A horizontal and layered velocity model was designed to demonstrate the improved vertical resolution of reverse time migration using the pseudospectral method, compared with the method of finite difference, for computing the spatial derivative.
Pdf Optimal Control Of Switched Systems By A Modified Pseudo Spectral We present a methodology called a one point wide based minimum boundary saving (mbs) scheme for wavefield reconstruction of pseudo spectral reverse time migration (psrtm). the key mechanism is that just a one point wide boundary has to be saved at the time of wave extrapolation. A horizontal and layered velocity model was designed to demonstrate the improved vertical resolution of reverse time migration using the pseudospectral method, compared with the method of finite difference, for computing the spatial derivative. We propose a 3d reverse time migration (rtm) using an hybrid finite difference (fd) pseudospectral algorithm to solve the two way acoustic equation. this mainly consists of forward backward 2d fft in lateral dimensions (x y plane) and 1d fd in the depth dimension. In this paper, we present a means to calculate optimal fdcs that reduce the dispersion of the spatial terms while adaptively varying with seismic velocity and wavelet bandwidth. in this manner we. We applied the conventional acoustic wave equation and pseudo space domain acoustic wave equation fd (with fd order being second order in time and eighth order in space and pseudo space) to perform rtm. Prestack reverse time migration (rtm) is currently one of the most accurate methods for seismic imaging. one of the key steps of rtm is wavefield forward and backward extrapolation and how to solve the wave equation fast and accurately is the essence of this process.
A Hybrid Sbp Sat Fourier Pseudo Spectral Method For The Transient We propose a 3d reverse time migration (rtm) using an hybrid finite difference (fd) pseudospectral algorithm to solve the two way acoustic equation. this mainly consists of forward backward 2d fft in lateral dimensions (x y plane) and 1d fd in the depth dimension. In this paper, we present a means to calculate optimal fdcs that reduce the dispersion of the spatial terms while adaptively varying with seismic velocity and wavelet bandwidth. in this manner we. We applied the conventional acoustic wave equation and pseudo space domain acoustic wave equation fd (with fd order being second order in time and eighth order in space and pseudo space) to perform rtm. Prestack reverse time migration (rtm) is currently one of the most accurate methods for seismic imaging. one of the key steps of rtm is wavefield forward and backward extrapolation and how to solve the wave equation fast and accurately is the essence of this process.
Figure 1 From Reverse Time Migration Using Pseudo Spectral Method Based We applied the conventional acoustic wave equation and pseudo space domain acoustic wave equation fd (with fd order being second order in time and eighth order in space and pseudo space) to perform rtm. Prestack reverse time migration (rtm) is currently one of the most accurate methods for seismic imaging. one of the key steps of rtm is wavefield forward and backward extrapolation and how to solve the wave equation fast and accurately is the essence of this process.
Comments are closed.