Communications – electrical: acoustic wave systems and devices – Seismic prospecting – Land-reflection type
Patent
1991-01-17
1992-01-28
Lobo, Ian J.
Communications, electrical: acoustic wave systems and devices
Seismic prospecting
Land-reflection type
367 63, 364421, G01V 124
Patent
active
050848445
ABSTRACT:
A method by which portions of a seismic data set are deleted since no meaningful data is contained in that portion contains the step where a line of data is examined, gather by gather, to determine the smallest useful arrival time for every offset. Data having an arrival time smaller than its useful arrival time is eliminated. In addition, the present method provides a manner of storing traces in pairs. In this method, the total number of traces is mathematically folded in half, storing the last trace with the first trace, etc. In an alternate embodiment, disk saving can be achieved by storing all the traces end to end in a single record and keeping track of the starting point and the length of each trace. The proposed method works for either SHOT or CDP gathers. Each line of data is examined, gather by gather, and the smallest useful arrival time is recorded for every offset.
REFERENCES:
patent: 3860759 (1975-01-01), Miller et al.
patent: 4121191 (1978-10-01), Corkhill
patent: 4509150 (1985-04-01), Davis
patent: 4543648 (1985-09-01), Hsu
patent: 4715002 (1987-12-01), Vernon et al.
Wood, L. C., "Seismic Data Compression Methods", Geophysics, vol. 39, #4, (1974), pp. 499-525.
Conoco Inc.
Lobo Ian J.
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