Adaptive and non-adaptive method for estimating the earth's reflection sequence
US4630242A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Mar 30, 1982 |
| Grant date | Dec 16, 1986 |
| Priority date | — |
| Expiry date | Mar 30, 2002 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01V1/375
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A method is disclosed for estimating the impulse response of the earth from Vibroseis data. Based on a time domain system identification approach, the earth's impulse response is estimated by operating on the seismic trace data and the vibrator pilot. Two implementations are discussed. The first is an adaptive method using a sliding data window and the uncorrelated trace data. Preferably, the process used to control the adaptation is the fast Kalman estimation (FKE) technique. This technique, based on recursive least squares, has a fast convergence rate and desirable computational requirements. The second implementation is non-adaptive. It uses the Levinson recursion technique to compute the Wiener filter solution based on the pilot autocorrelation function and the correlated trace data. Simulations demonstrate the capability of the system identification model to resolve reflection events.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.