A method is disclosed for characterising the subsurface levels of the Earth with a greater degree of accuracy than hitherto. Seismic data samples are migrated and stacked, for example according to known techniques and then spectrum analysed. The spectral analysis is applied to a feature of the subsurface and, for example, a particular layer bounded by a pair of horizons would be subject to volume reflection spectral analysis. The analysis is carried out using an orthogonal base by defining the reflection signals in terms of coefficients to a set of orthogonal polynomials. Additional seismic characteristics or attributes may be directly calculated from the polynomial coefficients. These coefficients represent the characteristics of the layer to a high degree of accuracy and may be compared with spectra derived a priori (for example synthetic spectra or previously characterised spectra) to further assist in analysis of measured seismic data.
申请公布号
WO9837437(A1)
申请公布日期
1998.08.27
申请号
WO1998IB00209
申请日期
1998.02.18
申请人
GECO AS;SONNELAND, LARS;TENNEBO, PER-OLA;GEHRMANN, THOMAS;YRKE, OYVIND;BOGE, KNUT, STEEN;BERGE, GUNNAR
发明人
SONNELAND, LARS;TENNEBO, PER-OLA;GEHRMANN, THOMAS;YRKE, OYVIND;BOGE, KNUT, STEEN;BERGE, GUNNAR