The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 12, 2000
Filed:
May. 25, 1999
Frederick J Barr, Pearland, TX (US);
William H Dragoset, Jr, Houston, TX (US);
Baker Hughes Incorporated, Houston, TX (US);
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.