Method for high-resolution seismic recording using detectors pla

Details Method for high-resolution seismic recording using detectors pla Method for high-resolution seismic recording using detectors pla

1990-10-31

1992-04-14

Lobo, Ian J.

Communications, electrical: acoustic wave systems and devices

Seismic prospecting

Land-reflection type

367 49, 367 57, 181112, 181122, 181401, G01V 120

Patent

active

051053918

ABSTRACT:
A method for high-resolution seismic recording with increased bandwidth using detectors planted at shallow depths below the earth's surface. In one embodiment, an optimum depth where the amplitudes of high frequency signals increase relative to that of the noise during high-resolution recording is determined, geophones are then planted at that optimum depth and signals are recorded at that depth. To find this optimum depth, detectors are planted at various depths below the earth's surface in order to record the signals at those various depths. The frequency spectra for each detected signal is generated and a velocity profile of the depths covered by the detectors is also generated from the signals. The bandwidth of the frequency spectra and the velocity profile are used to determine a depth for planting the detectors that is closer to the earth's surface than the depths previously considered.

REFERENCES:
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patent: 4298967 (1981-11-01), Hawkins
patent: 4499565 (1985-02-01), Fix et al.
patent: 4532618 (1985-07-01), Wemer
patent: 4758997 (1988-07-01), Nelson
Geophysics: vol. 51, No. 2: "High-resolution common depth-point reflection profiling: Field acquisition parameter design"; Feb. 1986, R. W. Knapp et al.
Geophysics; Leading Edge of Exploration "Techniques applied to obtain very high resolution 3-D seismic imaging at an Athabasca tar sands thermal plot"; Dec. 1987; N. Pullin, L. Matthews, K. Hirsche.
Geophysical Society of Tulsa Annual Spring Symposium: "Seismic Reflection Pro-Profiling of the Near-Surface"; Spring 1988: R. W. Knapp, et al.

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