| 摘要 |
PCT No. PCT/GB97/02791 Sec. 371 Date Apr. 6, 1999 Sec. 102(e) Date Apr. 6, 1999 PCT Filed Oct. 9, 1997 PCT Pub. No. WO98/15849 PCT Pub. Date Apr. 16, 1998Method of generating a fold distribution for a number of seismic sources and seismic receivers, comprises: (a) selecting a Common Mid-Point location; (b) selecting a dip within a first predetermined range and a strike within a second predetermined range; (c) determining the fold for the selected dip and strike at the selected location; and (d) repeating the step (c) for a number of different dips within the first predetermined range and a number of strikes within the second predetermined range. Thus producing a Dip Movement Dip Coverage Spectrum for evaluating the quality of seismic data obtained from a given survey geometry. The invention obviates or mitigates the problems of the prior art by obtaining a true representation of the fold distribution.
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