Use for a seismic energy pulse generator for generating and shap

Details Use for a seismic energy pulse generator for generating and shap Use for a seismic energy pulse generator for generating and shap

1975-03-05

1977-10-11

Wilbur, Maynard R.

Acoustics

Geophysical or subsurface exploration

Seismic wave generation

181115, 181142, G01V 106, G01V 138

Patent

active

040530272

ABSTRACT:
In seismic delineation of sedimentary section below the surface of a seismic energy propagation medium, a new use for an old article is disclosed. It includes a basic method for generating and shaping a seismic energy pulse comprising (1) generating a first energy pulse downwardly through the shortest distance to a point at the lower end of a vertical straight explosive material for forming a compressional forward portion of the seismic energy pulse, and (2) generating a second energy pulse later to form a rarefactional aft portion of the seismic energy pulse. By varying the length of the explosive material the lengths of the forward and aft portions are varied for controlling the shape of the seismic energy pulse, and by varying the position of the point of ignition of the linear explosive material, additional shaping of the seismic energy pulse results. This new use results in a method which produces a seismic energy pulse of the desired shape, a very thin elongated shape being preferable for attenuation of both the secondary bubble amplitude and time duration.

REFERENCES:
patent: 2770312 (1956-11-01), Silverman
patent: 2908342 (1959-10-01), Itria
patent: 3006279 (1961-10-01), Lawrence
patent: 3212437 (1965-10-01), Saling
patent: 3331050 (1967-07-01), Kilmer et al.
patent: 3687074 (1972-08-01), Andrews
patent: 3908789 (1975-09-01), Itria

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