Amplitude-preserved Prestack Interpolation Of Seismic Data With 3-D Fourier Transform

In the process of seismic acquisition, due to the impact of construction conditions (such as topography, geomorphology, etc.) or seismic data acquisition can not avoid the aperture effect and the possible failure detector, etc., the survey line direction group interval is too large, outliers, the data is incomplete or missing will appear in the volume. Missing data not only means that some information is missing, more importantly, it may be produced in a variety of processing a lot of unnecessary noise, processing and interpretation of the follow-up work such as FK filtering, Radon transform filtering, migration and so will produce seriously affected.Pre-stack trace interpolation is the rule of pre-stack time migration processing in an important part, through the pre-stack trace interpolation not only to improve the accuracy of migration and the effective suppression of noise, spatial aliasing suppression appears. The traditional seismic interpolation can be used to encrypt spatial sampling rate, offset to prevent the emergence of the dispersion and improve the signal to noise ratio. Pre-stack trace interpolation technique can process the missing traces and the missing shots seismic data. The seismic data volume after interpolating will involve more abundant geophysical information, the effects most same as infilling sample or inline.Preexisting trace interpolation technology has frequency-space domain, frequency-wavenumber domain, mixed-domain interpolation methods, the advantages of data interpolation can be achieved after the consistency of the grid, the normalized offset technology, but the amplitude of data was not fide after the interpolation, the fidelity of amplitude can't meet the processing requirements. Seismic amplitude preservation interpolation method can maintain the relative seismic energy relationship, no additional space aliasing, so that more truly reflect the geophysical information underground geological geophysical characteristics of the volume, is conducive to structural interpretation and seismic stratigraphy study.Three-dimensional Fourier transform is carried out in 3D space-time domain Fourier transform, and 3D space-time domain seismic exploration corresponds to the formation of its unique spectrum. Because 3D-FFT is orthogonal transformation, so in the two domains it has a good range of security, making changes consistent before and after the signal energy. 3D space-time can achieve a natural transition of energy, further to achieve seismic preserved amplitude interpolation.We selected 3D-FFT method as the main research method. Through the processing of models and real data with this technology, we can research the characteristics of seismic data and pre-stack seismic trace interpolation method. With using seismic data in Shengli exploration area, expand the seismic trace interpolation technology. Use the technology to overcome the spatial frequency, making it a true reflection of geophysical information more geophysical underground geological features. Process the actual seismic data using these techniques.