Communications – electrical: acoustic wave systems and devices – Seismic prospecting – Land-reflection type
Patent
1994-10-05
1997-07-15
Moskowitz, Nelson
Communications, electrical: acoustic wave systems and devices
Seismic prospecting
Land-reflection type
367 21, 367 58, 364421, G01V 120, G01V 128
Patent
active
056489382
ABSTRACT:
A system for acquiring and processing seismic data comprises source-means for generating sound waves and receiver-means for recording as data those waves as reflected from sub-surface interfaces, and means for processing the recorded data operable to generate sets of actual data each individually associated with specific sub-surface reflection points, order the data-sets in accordance with receiver and source-means separation, process each data-set to generate additional data intermediate the recorded data, and re-order each data-set and additional data in accordance with receiver and source-means separation for further processing. Each data-set is applied to a filter to generate said additional data intermediate of the recorded actual data. The filter is selected from the group comprising linear, quadratic or spline interpolation filters, frequency space (f-x) filters, tau-p filters, smart filters artificially intelligent filters, neural network filters and (preferably) sinc filters. The recorded actual data are also subject to traveltime correction (for example NMO). Data collection may be by use of a single shot source and a plurality of receivers which are equi-spaced, linked in a linear array, and movable above a surface to be surveyed. The data-sets may comprise common receiver or common shot gathers and the described techniques are applicable to other forms of seismic data gathers.
REFERENCES:
patent: 1240328 (1917-09-01), Fessenden
patent: 2732906 (1956-01-01), Mayne
patent: 4742497 (1988-05-01), Beasley et al.
Kinneging et al, 61st Annu. GEG lnt. ortg., Nov. 10, 1991, V-2, pp. 1373-1376, Pape. No. Sp 3-1; abst. only herewith.
McMechan et al, Gegrbysies, vol. 56, #3, pp. 390-396, Mar. 1991; abst. only herewith.
Ensign Geophysics Limited
Moskowitz Nelson
Nath Gary M.
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