--> Abstract: Sampling 3-D Seismic Data, by V. Bardan; #90990 (1993).
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BARDAN, VIRGIL, Prospectiuni S.A., Bucharest, Romania

ABSTRACT: Previous HitSamplingNext Hit 3-D Seismic Data

A three-dimensional (3-D) seismic survey is usually achieved by recording a parallel profile network. The 3-D data thus obtained are sampled and processed in a cubic grid for which the Previous HitsamplingNext Hit requirements generally are derived from the usual one-dimensional (1-D) viewpoint. The spectrum of 3-D seismic data has a bandregion (the region of the Fourier space in which the spectrum is not zero) that can be approximated by a domain bounded by two cones. Considering the particular shape of this support, we use the 3-D Previous HitsamplingNext Hit theory to obtain results applicable to the recording and processing of 3D seismic data. This naturally leads to weaker Previous HitsamplingNext Hit requirements than the 1-D viewpoint. We define the hexagonal noncubic Previous HitsamplingNext Hit grid and the triangular noncubic Previous HitsamplingNext Hit grid and show that fewer sample points are needed to represent 3-D seismic data with the same degree of accuracy. Thus, using the hexagonal noncubic Previous HitsamplingNext Hit grid, we point out that the maximum value of the Previous HitspatialNext Hit Previous HitsamplingNext Hit interval along the profiles is larger by 15.6% than the one of the cubic Previous HitsamplingNext Hit grid. We also point out that the triangular noncubic Previous HitsamplingNext Hit grid requires a number of sample points equal to half the number required by a cubic Previous HitsamplingTop grid.

AAPG Search and Discovery Article #90990©1993 AAPG International Conference and Exhibition, The Hague, Netherlands, October 17-20, 1993.