Robust estimates of seismic reflector orientations with weighted vector directional filter
Wang, W., Gao, J. and Chen, W., 2011. Robust estimates of seismic reflector orientations with weighted vector directional filter. Journal of Seismic Exploration, 20: 119-134. A major difficulty in estimating seismic reflector orientations (dip and azimuth) arises at discrete lateral and vertical discontinuities across which reflector dip and azimuth change. To overcome this problem, we explore a weighted vector directional filter (WVDF) for smoothing volumetric dip and azimuth computed by a finite-difference method. The approach falls into three steps: (1) set a reference direction, (2) invert opposite vectors to convert directions into orientations, and (3) smooth the vector field with the WVDF. The smearing and confusing variations that arise across lateral and vertical geological boundaries with traditional dip and azimuth estimations are avoided by the proposed method. This method is more robust for estimating seismic dip and azimuth and has potential for applications such as structure-oriented filtering and coherence. A still more promising application of this method is high-resolution dip and azimuth analysis through volumetric estimations of reflector curvature. Both synthetic and real data examples are used to demonstrate the ability and efficiency of our approach.
- AlBinHassan, N.M., Luo, Y. and Al-Faraj, M.N., 2006. 3D edge-preserving smoothing and
- applications. Geophysics, 71(4): 5-11.
- Al-Dossary, S. and Marfurt, K.J., 2006. 3D volumetric multispectral estimates of reflector curvature
- and rotation. Geophysics, 71(5): 41-51.
- Barnes, A.E., 1996. Theory of two-dimensional complex seismic trace analysis. Geophysics, 61:
- 264-272.
- Barnes, A.E,, 2000. Weighted average seismic attributes. Geophysics, 65: 275-285.
- Dalley, D., 2008. Value of visual attributes: Revisiting dip and azimuth displays for 3D seismic
- interpretation. First Break, 26: 87-91.
- Fehmers, G. and Hocker, C., 2003. Fast structural interpretation with structure-oriented filtering.
- Geophysics, 68: 1286-1293.
- Fomel, S., 2002. Applications of plane-wave destruction filters. Geophysics, 67: 1946-1960.
- Gersztenkorn, A. and Marfurt, K.J., 1999, Eigenstructure based coherence computations as an aid
- to 3D structural and stratigraphic mapping. Geophysics, 64: 1468-1479.
- Hoeber, H., Brandwood, S, and Whitcombe, D.N., 2006. Structurally consistent filtering. Extended
- Abstr., 68th EAGE Conf., Vienna: Z-99.
- Lavialle, O., Pop, S., Germain, C., Donias, M., Guillon, S., Keskes, N. and Berthoumieu, Y.,
- Seismic fault preserving diffusion. J. Appl. Geophys., 61: 132-141.
- Lukac, R., Smolka, B., Martin, K., Plataniotis, K.N. and Venetsanopoulos, A.N., 2005. Vector
- filtering for color imaging. IEEE Signal Proc. Mag., Spec. Issue on Color Image Proc., 22:
- 74-86.
- Luo, Y., Higgs, W.G. and Kowalik, W.S., 1996. Edge detection and stratigraphic analysis using
- 3D seismic data. Expanded Abstr., 66th Ann. Internat. SEG Mtg., Denver: 324-327.
- Luo, Y., Marhoon, M., Al-Dossary, S., and Alfaraj, M., 2002. Edge-preserving smoothing and
- applications. The Leading Edge, 21: 136-158.
- Luo, Y., Wang, Y.E., AlBinHassan, N.M. and Alfaraj, M.N., 2006. Computation of dips and
- azimuths with weighted structural tensor approach. Geophysics, 71(5): 119-121.
- Marfurt, K.J., Kirlin, R.L., Farmer, S.H. and Bahorich, M.S., 1998. 3D seismic attributes using
- a running window semblance-base algorithm. Geophysics, 63: 1150-1165.
- Marfurt, K.J., Sudhaker, V., Gersztenkorn, A., Crawford, K.D. and Nissen, S.E., 1999. Coherence
- calculations in the presence of structural dip. Geophysics, 64: 104-111.
- Marfurt, K.J., 2006. Robust estimates of 3D reflector dip and azimuth. Geophysics, 71(4): 29-40.
- Ottolini, R., 1983. Signal/noise separation in dip space. SEP report 37: 143-149.
- Randen, T., Monsen, E., Signer, C., Abrahamsen, A., Hansen, J.O., Saeter, T., Schlaf, J. and
- Sonneland, L., 2000. Three-dimensional texture attributes for seismic data analysis.
- Expanded Abstr., 70th Ann. Internat. SEG Mtg., Calgary, Alberta: 668-671.
- 134 WANG, GAO & CHEN
- Trahanias, P.E. and Venetsanopoulos, A.N., 1993. Vector directional filters: A new class of
- multichanne! image processing filter. IEEE Trans. Image Proc., 2(4): 528-534.
- Wang, Y.E., Luo, Y. and Alfaraj, M., 2008. Inverse-vector approach for smoothing dips and
- azimuths. Geophysics, 73(6): 9-14.
- Wang, Y.E., Luo, Y. and Alfaraj, M., 2008. Enhanced isotropic 2D and 3D gradient method. U.S.
- Patent 11/787986.
