The Research Of Seismic Data Processing And Deep Data Imaging

Seismic exploration data processing is a course that aims at field data processing by means of digital computer in order to obtain the information of subsurface structure and formation, which can be used for searching for petroleum and natural gas effectively. Firstly, this paper introduces the main concepts of digital filtering, NMO, statics, velocity analysis and stack and so on. Then the application of Omega seismic processing software is introduced basically. The object of digital filtering is digital signal, such as broadcasting sound in computer. The fundamental procedure of digital filtering is processing a sequence of signal with definite frequency (input signal) before output another sequence of signal (output signal). Statics is a whole migration of seismic wave track in its propagation. The common statics is a correction for weathered 1 ayer, which can be used for compensating the weathered 1 ayer near surface. The other types of statics are utilized for signal compensation in evaluating the difference among the source, receiver imaging and wave signal.Based on the simple understanding of normal seismic processing, this paper has carried out deep research on the problems of deep prospecting in seismic data processing, such as S/N (signal to noise ratio), velocity analysis and residual NMO of unsymmetrical hyperbola, stacking and imaging of complex rays and migration arc. Until now tens of accomplishments have been achieved. According to these accomplishments, several techniques are expounded emphatically in this paper, including 3D refraction statics, coherent noise suppression by prestack wave field separating (prestack FX noise attenuation), 3D prestack multiple domain random noise attenuation, multiples attenuation, NMO of unsymmetrical hyperbola, dynamic replacement of wave equation, surface-inconsistent residual static, super bin stacking, poststack depth migration and prestack depth migration. All the techniques have been applied in seismic processing of 2D, 3D and wide-line profiling and obtained good results.