| 摘要 |
Seismic data from towed marine streamers are sorted 51 into two-dimensional common midpoint gathers of traces. The gathered traces are ordered 52 by offset. The offset distribution of the ordered traces is regularized 53. The source and receiver coordinates of the regularized traces are adjusted 54 to reflect the regularizing. Before regularizing, a traveltime correction (e.g. normal moveout NMO) can be applied to minimize spatial aliasing. Also, trace interpolation can be performed prior to regularizing to replace missing or corrupted traces. The offset distribution is regularized by interpolating the actual acquired offset distribution to the regular (nominal) offset distribution, using a Fourier transform technique or a spline technique. Original shot numbers, field file identification numbers and channel numbers are retained. |
