System and method of phase encoding for high fidelity vibratory seismic data
US7295490B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 20, 2006 |
| Grant date | Nov 13, 2007 |
| Priority date | — |
| Expiry date | Jul 20, 2026 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01V1/005
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
In accordance with the present invention, there is provided a method of determining whether a particular high fidelity vibratory seismic survey phase encoding is likely to be a good one based on an analysis of the eigenvalue structure (i.e., eigenvalues, eigenvalue separation, condition number, and model resolution matrix) of a matrix formed from the Fourier transforms of the sweep signals. Preferably, a singular value decomposition will be used to calculate the eigenvalues. Using this same approach, the condition number and eigenvalues of matrices that are associated with multiple proposed designs can be compared with each other to determine which is likely to be yield the best seismic data. This approach is preferably used either as a component of the advanced planning for a survey or in the field during pre-survey testing. The use of the instant approach to determine an optimal phase encoding scheme is also taught.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.