Processing method for obtaining a stack section with zero offsets
US5532977A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Feb 16, 1993 |
| Grant date | Jul 2, 1996 |
| Priority date | — |
| Expiry date | Feb 16, 2013 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01V1/282
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A method and device for obtaining a zero-offset seismic section from a stack seismic section produced from stack traces recorded along a given line of survey, is disclosed. The present method and device is directed to determining an interval velocity macro-model which defines a number of reflectors along the line of survey as a function of depth; calculating from the macro-model, travel times for each of the seismic traces of each of CMP gathers and each of the reflectors of the macro-model; defining for each of the CMP gathers, as many primary indicatrices as there are reflectors in the macro-model; calculating between the primary indicatrices associated with each of the CMP gathers, as many interpolated indicatrices as there are samples over the stack trace corresponding to a given CMP gather; and stacking the seismic traces of each of the CMP gathers along the indicatrices associated with the given CMP gather, so as to produce a set of stack seismic traces obtained for all the CMP gathers constituting the zero-offset seismic section along the given line of survey.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.