US 6,982,927 B2
Method for processing seismic data to identify anomalous absorption zones
M. Turhan Taner, Houston, Tex. (US)
Assigned to RDSP I, L.P., Houston, Tex. (US)
Filed on Sep. 24, 2003, as Appl. No. 10/670,110.
Prior Publication US 2005/0075790 A1, Apr. 07, 2005
Int. Cl. G01V 1/30 (2006.01)
U.S. Cl. 367—49 20 Claims
OG exemplary drawing
 
1. A method for processing seismic data to detect anomalously absorptive zones, comprising:
joint time-frequency decomposing seismic traces;
low frequency bandpass filtering the decomposed traces to determine a general trend of mean frequency and bandwidth of the seismic traces; and
high frequency bandpass filtering the decomposed traces to determine local variations in the mean frequency and bandwidth of the seismic traces, whereby anomalous zones are determined when the local variations deviate from the general trend.