3-D converted shear wave rotation with layer stripping

Communications – electrical: acoustic wave systems and devices – Seismic prospecting – Land-reflection type


Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0


364421, G01V 100, G01V 136




A method for using a compressional-wave source to produce converted shear waves which are subjected to Alford 4-component rotation to align the observation coordinates with the natural coordinates of the principal anisotropic axes of a birefringent formation. The static time shift between the fast and the slow shear wavefields due to shear-wave splitting is determined so that they can be synchronized thereby to isotropize the birefringent formation. From those data, fracture-plane orientation can be determined. Based on those data, the direction of a deviated bore hole is aligned perpendicular to the fracture plane strike. For a deep-seated target formation, shallower layers are isotropized prior to rotation and synchronization of the converted shear wavefields originating from that deeper formation.

patent: 4736349 (1988-04-01), Goins et al.
patent: 5060203 (1991-10-01), Winterstein
patent: 5136554 (1992-08-01), Thomsen et al.
patent: 5142501 (1992-08-01), Winterstein
patent: 5343441 (1994-08-01), Alford
Alford, R. M., Amoco Production Co., "Shear Data in the Presence of Azimuthal Anisotropy: Dilley, Texas", Seismic 9, S9. 6, pp. 476-479.
Garotta, Robert and Granger, Pierre Yves; CGG, France, "Acquisition and Processing of 3C .times. 3-D Data Using Converted Waves", S 13. 2, pp. 995-997.
Mallick, Subhashis and Frazer, L. Neil, "Reflection/transmission coefficients and azimuthal anisotropy in marine seismic studies", Geophys. J. Int. (1991) 105, 241-252.


Say what you really think

Search LandOfFree.com for the USA inventors and patents. Rate them and share your experience with other people.


3-D converted shear wave rotation with layer stripping does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with 3-D converted shear wave rotation with layer stripping, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and 3-D converted shear wave rotation with layer stripping will most certainly appreciate the feedback.

Rate now


Profile ID: LFUS-PAI-O-449109

All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.