Filtering of overburden azimuthal anisotropy effects from 3D sei

Details Filtering of overburden azimuthal anisotropy effects from 3D sei Filtering of overburden azimuthal anisotropy effects from 3D sei

1997-06-30

2000-05-09

Barlow, John

Communications, electrical: acoustic wave systems and devices

Seismic prospecting

Land-reflection type

367 51, G01V 100

Patent

active

060613017

ABSTRACT:
A method and system for correcting seismic survey signals for separating and correcting for the effects of azimuthal anisotropy caused by the overburden, rather than the subsurface reflectivity, is disclosed. Following an initial estimate and normal moveout correction of the traces in a common midpoint gather, analytical traces are generated for coefficient series corresponding to zero-offset travel time response and to the azimuthal anisotropy, over the corrected gather. The quadrature-phase component of the azimuthal anisotropy coefficient series relative to the zero-offset travel time coefficient series indicates the effects of overburden azimuthal anisotropy, while the in-phase component indicates the effects of azimuthal anisotropy from subsurface reflective interfaces. Additional normal moveout correction to correct for the overburden azimuthal anisotropy may then be performed.

REFERENCES:
patent: 4970696 (1990-11-01), Crews et al.
patent: 5258960 (1993-11-01), Swan
patent: 5297108 (1994-03-01), Swan
patent: 5430689 (1995-07-01), Rigsby et al.
patent: 5508973 (1996-04-01), Mallick et al.
patent: 5515335 (1996-05-01), Swan
patent: 5532978 (1996-07-01), Corrigan
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.
Taner, et al., "Complex Seismic Trace Analysis", Geophysics , vol. 44, No. 6 (Jun., 1979), pp. 1041-1063.
Herbert Swan, Amplitude-versus-offset measurement errors in a finely layered medium, Geophysics, vol. 56 No. 1 Jan. 1, 1991 pp. 41-49.
John Castagna & Milo Backus, Offset-Dependent Reflectivity-Theory and Practice of AVO Analysis,Society of Exploration Geophysics, Jan. 1, 1993.
Subhashis Mallick, A simple approximation to the P-wave reflection coefficient and its implication in the inversion of amplitude variation with offset data, Geophysics, vol. 58, No.4 pp. 544-552, Apr. 1, 1993.
S. Mallick & L. Frazer, Reflection/Transmission coefficients and azimuthal anisotropy in marine seismic studies, Europe Geophys. Soc. Symp. Barcelona Spain, Geophysics Journal vol. 105, No. 1 pp. 241-252, Apr. 1, 1991.
H. Swan, Noise Sensitivity on Linear Seismic Inversion, 63rd Annual Meeting and International Exhibition, pp. 1177-1180, Wash. , DC, Sep. 26, 1993.
H. Swan, Amplitude versus offset analysis in finely layered media, Society of Exploration Geophysicists, 58th Annual Int'l. Meeting and Exposition, pp. 1195-1198, Jan. 1, 1988.

Affiliated with

Also associated with

Rating

Filtering of overburden azimuthal anisotropy effects from 3D sei does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Filtering of overburden azimuthal anisotropy effects from 3D sei, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Filtering of overburden azimuthal anisotropy effects from 3D sei will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1071710