Seismic data acquisition and processing using non-linear distort

Details Seismic data acquisition and processing using non-linear distort Seismic data acquisition and processing using non-linear distort

1999-05-25

2000-12-12

McElheny, Jr., Donald E.

Data processing: measuring, calibrating, or testing

Measurement system in a specific environment

Earth science

367 43, 367117, G01V 128

Patent

active

061610763

ABSTRACT:
A method for improving vibratory source seismic data uses a filter which converts a recorded seismic groundforce signal (including harmonic distortion therein) into a desired short-duration wavelet. A plurality of surveys may be carried out using a plurality of sweeps from plurality of vibrators that have their relative phases encoded, the groundforce signal of each vibrator being measured. The recorded seismic reflection signals are then processed to separate out the signals from each vibrator. In another aspect, harmonics of upto any desired order may be canceled while carrying out multiple surveys with a plurality of vibrators. In a marine environment, the recorded signal from a vibrator towed by a moving vessel is used to derive a Doppler shift correction filter that is applied to reflection seismic data.

REFERENCES:
patent: 4809235 (1989-02-01), Dragoset, Jr.
patent: 5703833 (1997-12-01), Allen
patent: 5721710 (1998-02-01), Sallas et al.

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