Title:
SEISMIC PROCESSING SYSTEM AND METHOD TO DETERMINE THE EDGES OF SEISMIC DATA EVENTS
Document Type and Number:
WIPO Patent Application WO2002052299
Kind Code:
A3
Abstract:
A seismic processing technique calculates a coherency estimate for seismic data volume to detect edges of seismic events. The method includes selecting a portion of the seismic data volume for analysis, selecting a spatial and temporal position in the subset seismic data volume, selecting a subset of seismic samples around seismic position, placing subset seismic sample volume in a matrix, or calculating cosine of instantaneous phase of subset of seismic samples and placing those samples in a matrix, and calculating a coherency estimate for that matrix. The coherency estimate is calculated using either eigenvalue, maximum likelihood or maximum entropy analysis. The coherency estimate is then written to a coherence seismic volume and another spatial and temporal seismic sample position is selected and the process is repeated until all coherence samples are computed for the seismic data volume. The coherence seismic data volume is examined and analyzed for useful information.
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Inventors:
MEEK ROBERT A
Application Number:
PCT/US2001/049417
Publication Date:
March 27, 2003
Filing Date:
December 19, 2001
Export Citation:
Assignee:
CONOCO INC (US)
International Classes:
G01V1/28; (IPC1-7): G01V1/32
Foreign References:
| US5892732A | 1999-04-06 | |||
| US4916615A | 1990-04-10 | |||
| US5995907A | 1999-11-30 |
Other References:
MARFURT K J ET AL: "3-D seismic attributes using a semblance-based coherency algorithm", GEOPHYSICS, SOCIETY OF EXPLORATION GEOPHYSICISTS. TULSA, US, vol. 63, no. 4, July 1998 (1998-07-01), pages 1150 - 1165, XP002195379, ISSN: 0016-8033
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