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:
Jun. 09, 1998
Filed:
Dec. 29, 1995
David D Thompson, Plano, TX (US);
Bok S Byun, Plano, TX (US);
Atlantic Richfield Company, Los Angeles, CA (US);
Abstract
A computer system and method for correcting seismic data for phase distortion due to the effects of the near-surface layer are disclosed. Phase error corrections are performed on multiple frequency bands, beginning with a primary band and then proceeding with adjacent frequency bands. The primary band phase constant and time lag corrections are derived in a manner in which the phase correction is applied to the correlation function prior to selection of the peak time lag value, improving the accuracy of the time lag decomposition. Corrections for the secondary bands are made in such a way that the phase corrections at a tie frequency within the overlap frequencies between each secondary band and its adjacent bands are forced to be equal. At each step, surface-consistent decomposition of the phase static components and the time lag static components is performed using a weighted least-squares approach. An alternative embodiment performs the method by determining total corrections in each band to minimize the data storage requirements.