| 摘要 |
<p>Method for analyzing and processing reflection seismic data for determining a fine field of hyperbolicity correction speeds. It is characterized in that, for all collections of dynamically corrected traces, the maximum values of positive and negative residues of the dynamic correction are determined, and a temporal analysis range is determined on either side of a time value To and of which the width is equal at the maximum to twice the absolute value of the maximum residue; a family of 2n+1 hyperbolas or parabolas of residual correction is constructed, each of them having the apex centred at the time value To and presenting, at the maximum offset value, a time value equal to one of the 2n+1 equidistant time values predetermined on the analysis range and including the value To and the extreme values of said analysis range; 2n+1 defined sets of static corrections are determined by the time deviations with respect to said time value To on the 2n+1 hyperbolas or parabolas of residual correction; for each collection of traces, there is applied successively at each of the traces and for each hyperbola or parabola the statistics associated to the offset of said trace; and the traces thus corrected statistically are summed up so as to obtain an assembly of 2n+1 traces sum characterizing a field of correction speeds. Applications particularly to the oil industry.</p> |
