Communications – electrical: acoustic wave systems and devices – Seismic prospecting – Land-reflection type
Patent
1998-07-31
2000-05-02
Oda, Christine
Communications, electrical: acoustic wave systems and devices
Seismic prospecting
Land-reflection type
367 47, 367 21, 367 52, G01V 136
Patent
active
060580747
ABSTRACT:
A computer system and method of operating the same to apply overburden corrections to seismic signals prior to amplitude-versus-offset (AVO) analysis is disclosed. The system and method retrieve common midpoint gathers of the seismic signals, and generate analytical, or complex, AVO intercept and AVO slope traces therefrom, effectively stacking the traces in each gather. Over a sliding time window of the stacks, the computer system generates p-measure standard deviation and correlation statistics, preferably using a p-measure value less than one. The AVO intercept and AVO slope traces are then modified, at each depth point of interest corresponding to a time window placement, according to the relationship between the p-measure statistics and the desired statistics for the background distribution. Conformance of the background statistics to known values can be achieved, thus eliminating offset-dependent contamination of the AVO data; this is accomplished with minimal influence from AVO anomalous points, improving the sensitivity and accuracy with which petrophysically-interesting strata may be detected from AVO traces.
REFERENCES:
patent: 4479204 (1984-10-01), Silverman
patent: 5001677 (1991-03-01), Masters
patent: 5440525 (1995-08-01), Dey-Sarkar et al.
patent: 5453958 (1995-09-01), Neff
patent: 5515335 (1996-05-01), Swan
patent: 5661697 (1997-08-01), Swan et al.
patent: 5784334 (1998-07-01), Sena et al.
Swan, "Properties of direct AVO hydrocarbon indicators", Offset-dependent reflectivity--Theory and Practice of AVO analysis (Castagna, J.P. & Backus, M.M., eds., Soc. Expl. Geophys., 1993), pp. 78-92.
Castagna and Swan, "Principles of AVO crossplotting", The Leading Edge (Apr. 1997), pp. 337-342.
Castagna, Swan, and Foster, "Framework for AVO gradient and intercept interpretation", Geophysics, vol. 63, No. 3, (May-Jun. 1998), pp. 948-956.
Swan Herbert W.
VerWest Bruce J.
Atlantic Richfield Company
Jolly Anthony
Oda Christine
LandOfFree
Method and system for detecting hydrocarbon reservoirs using amp does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method and system for detecting hydrocarbon reservoirs using amp, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and system for detecting hydrocarbon reservoirs using amp will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1599393