Noise filtering method for seismic data
US5971095A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jun 23, 1998 |
| Grant date | Oct 26, 1999 |
| Priority date | — |
| Expiry date | Jun 23, 2018 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01V2210/3246
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A method for filtering noise from discrete noisy seismic signals in a time interval ([1, . . . , T]) is provided. The method comprising the steps of using the noisy seismic signals for determining at least one reference channel (x(t)) for the time interval as an estimate of the noise; determining coefficients for M temporally local filters (w(i, t)), the filters forming a filter bank, and M being a number equal to or larger than two, by minimizing a cost function (J(t)) representing a measure of the error of the output of the filter bank, and applying the filter bank to at least one estimate (x(t)) to determine M filtered estimates of the noise. The filtered estimates are multipled with temporal windows (h(i, t)).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.