Processing seismic data to remote noise
US10126453B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 4, 2015 |
| Grant date | Nov 13, 2018 |
| Priority date | — |
| Expiry date | Sep 28, 2036 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01V2210/32
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An embodiment of a method includes receiving seismic data from an array of seismic receivers, selecting a time window, and dividing the time window into a plurality of consecutive time segments, each corresponding to a subset of the seismic data. The method also includes performing a transformation of each subset into a frequency domain subset having a total frequency band, and selecting a narrow frequency band bounded by the lowest frequency of the total band and a threshold frequency. The method further includes, for each of the plurality of frequencies in the narrow frequency band, determining a cross-spectral density matrix (CSDM) of data values in each frequency domain subset, decomposing the CSDM to generate a plurality of eigenvalues, and removing at least the most significant eigenvalue from each frequency domain subset. The method still further includes transforming each frequency domain subset into a time domain to generate de-noised seismic data.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.