Method of estimating the illumination fold in the migrated domain
US7406383B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 20, 2004 |
| Grant date | Jul 29, 2008 |
| Priority date | — |
| Expiry date | Jul 20, 2024 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01V1/28
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
The invention relates to an estimate of the seismic illumination fold (x, p) in the migrated 3D domain at an image point x, for a dip of vector p characterized in that the illumination fold I (z, p; s, r) is estimated for each (source s, receiver r) pair in the seismic survey, by applying the following steps:—determination of the reflection travel time tr(·xr(p);s·r) from the source s to the specular reflection point z, on the plane reflector passing through the image point x and perpendicular to the dip vector p, and then return to the reflector r; starting from the diffraction travel time td(·z;s·r) from the source to the said image point x and then return to the reflector r;—incrementing the said illumination fold I (X, p; s, r) related to the said (source s, receiver r) pair as a function of the difference between the diffraction travel time td(x;s,r) and the reflection travel time tr(xr(p)issr).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.