Journal of the Korean Society of Mineral and Energy Resources Engineers ISSN:2288-0291(Print) 2288-2790(Online) 한국자원공학회지

In this paper, we investigate the refraction static correction method that calculates static shifts in wavenumber domain. It is well known that the method is not sensitive to the noise and produces a stable solution. However, since it requires regularly spaced data and the same number of samples in each offset for Fourier transform, most of real data are required to be interpolated before the static calculation. We applied three different methods, which are average times allocation, cosine tapering, and natural cubic spline interpolation, to interpolate data. And refraction statics calculation in wavenumber domain is applied for the interpolation data. In the synthetic data example, cosine tapering showed the least rms error among the three methods. In the field data case, cosine tapering also showed the least rms error. Although the differences between the interpolation methods are trivial, we have got the quite satisfactory results by allocating the average value of each offset in the direction of CMP while maintaining the data continuity.