Estimation of density and fracture orientation in HTI media through azimuthal analysis of p-waves
Keywords:
Tenerife field, HTI anisotropy, Fractures, Stress
Abstract
In a medium with Horizontal Transverse Isotropy (HTI) associated with fractures, Normal Move Out (NMO) velocity varies ellipsoidally with the azimuth. The major axis of the ellipse indicates the direction of the fractures. Also, density is defined by the axial ratio. We are presenting a methodology to estimate fracture parameters based on the difference of NMO times measured in two orthogonal common midpoint seismic lines. The method was tested with synthetic data and then applied in seismic data of the La Luna Formation in the Tenerife Field, providing the orientation of the fractures as well as an estimated density. Results were validated by analysis of Fullbore Formation Microimager FMI logs acquired in wells in the vicinity of the Field.
References
Cortes, M. & Angelier, J. (2005). Current states of stress in the northern Andes as indicated by focal mechanisms of earthquakes. Tectonophysics, 403(1-4), 29-58.
https://doi.org/10.1016/j.tecto.2005.03.020
Duque-Escobar, G. (2003). Manual de geología para ingenieros. Manizales: Universidad Nacional de Colombia.
Hao, H., Zhang, J., Junying, L., Xueshan, Y. & Wuyang, Y. (2011). A way of arbitrary azimuth fracture estimation. International Geophysical Conference, Shenzhen, China.
https://doi.org/10.1190/1.4705019
Lefeuvre, F. (1994). Fracture related anisotropy detection and analysis. SEG Annual Meeting, Los Angeles, USA.
https://doi.org/10.1190/1.1932047
Li, X., Liu, Y., Liu, E., Shen, F., Qi, L. & Shouli, Q. (2003). Fracture detection using land 3D seismic data from the Yellow River Delta, China. The Leading Edge, 22(7), 680-683.
https://doi.org/10.1190/1.1599696
Li, X. Y. (1999). Fractures detection using azimuthal variation of P-wave moveout from orthogonal seismic survey lines. Geophysics, 64: 1193-1201.
https://doi.org/10.1190/1.1444626
Luo, M. & Evans, B. (2004). An amplitude-based multiazimuth approach to mapping fractures using P-wave 3D seismic data. Geophysics, 69(3), 690-698.
https://doi.org/10.1190/1.1759455
Sayers, C. & Ebrom, D. (1997). Seismic travel time analysis for azimuthally anisotropic media: Theory and experiment. Geophysics, 62(5), 1570-1582.
https://doi.org/10.1190/1.1444259
Thomsen, L. (1988). Reflection seismology over azimuthally anisotropic media. Geophysics, 53(3), 304-313.
https://doi.org/10.1190/1.1442464
Thomsen, L. (1986). Weak elastic anisotropy. Geophysics, 51(10), 1954-1966.
https://doi.org/10.1190/1.1442051
Toro, R. & Osorio, J. A. (2005). Determinación de los tensores de esfuerzos actuales para el segmento norte de los Andes calculados a partir de los mecanismos focales de sismos mayores. Boletín de Geología, 27(1), 13-24.
Tsvankin, I. (1997). Reflection moveout and parameter estimation for horizontal transverse isotropy. Geophysics, 62(2), 614-629.
https://doi.org/10.1190/1.1444170
Wang, S. & Li, X. (2003). Fracture detection using 3D seismic data: A physical modeling study. SEG Annual Meeting, Dallas, USA.
https://doi.org/10.1190/1.1817813
Zhan, Y., Chen, S., Jiang, C., Zhang, E., Ju, L. & Li, M. (2010). Application of P-wave azimuthal anisotropy for fracture detection in a volcanic reservoir. SEG Annual Meeting. Denver, USA.
https://doi.org/10.1190/1.3513433
Zheng, Y., Todorovic, D., & Larson, G. (2004). Seismic fracture detection: Ambiguity and practical solution. SEG Annual Meeting, Denver, USA.
https://doi.org/10.1190/1.1851139
https://doi.org/10.1016/j.tecto.2005.03.020
Duque-Escobar, G. (2003). Manual de geología para ingenieros. Manizales: Universidad Nacional de Colombia.
Hao, H., Zhang, J., Junying, L., Xueshan, Y. & Wuyang, Y. (2011). A way of arbitrary azimuth fracture estimation. International Geophysical Conference, Shenzhen, China.
https://doi.org/10.1190/1.4705019
Lefeuvre, F. (1994). Fracture related anisotropy detection and analysis. SEG Annual Meeting, Los Angeles, USA.
https://doi.org/10.1190/1.1932047
Li, X., Liu, Y., Liu, E., Shen, F., Qi, L. & Shouli, Q. (2003). Fracture detection using land 3D seismic data from the Yellow River Delta, China. The Leading Edge, 22(7), 680-683.
https://doi.org/10.1190/1.1599696
Li, X. Y. (1999). Fractures detection using azimuthal variation of P-wave moveout from orthogonal seismic survey lines. Geophysics, 64: 1193-1201.
https://doi.org/10.1190/1.1444626
Luo, M. & Evans, B. (2004). An amplitude-based multiazimuth approach to mapping fractures using P-wave 3D seismic data. Geophysics, 69(3), 690-698.
https://doi.org/10.1190/1.1759455
Sayers, C. & Ebrom, D. (1997). Seismic travel time analysis for azimuthally anisotropic media: Theory and experiment. Geophysics, 62(5), 1570-1582.
https://doi.org/10.1190/1.1444259
Thomsen, L. (1988). Reflection seismology over azimuthally anisotropic media. Geophysics, 53(3), 304-313.
https://doi.org/10.1190/1.1442464
Thomsen, L. (1986). Weak elastic anisotropy. Geophysics, 51(10), 1954-1966.
https://doi.org/10.1190/1.1442051
Toro, R. & Osorio, J. A. (2005). Determinación de los tensores de esfuerzos actuales para el segmento norte de los Andes calculados a partir de los mecanismos focales de sismos mayores. Boletín de Geología, 27(1), 13-24.
Tsvankin, I. (1997). Reflection moveout and parameter estimation for horizontal transverse isotropy. Geophysics, 62(2), 614-629.
https://doi.org/10.1190/1.1444170
Wang, S. & Li, X. (2003). Fracture detection using 3D seismic data: A physical modeling study. SEG Annual Meeting, Dallas, USA.
https://doi.org/10.1190/1.1817813
Zhan, Y., Chen, S., Jiang, C., Zhang, E., Ju, L. & Li, M. (2010). Application of P-wave azimuthal anisotropy for fracture detection in a volcanic reservoir. SEG Annual Meeting. Denver, USA.
https://doi.org/10.1190/1.3513433
Zheng, Y., Todorovic, D., & Larson, G. (2004). Seismic fracture detection: Ambiguity and practical solution. SEG Annual Meeting, Denver, USA.
https://doi.org/10.1190/1.1851139
How to Cite
Montes Vides, L. A., Cortes Gómez, D. M., & Agudelo Zambrano, W. M. (2013). Estimation of density and fracture orientation in HTI media through azimuthal analysis of p-waves. CT&F - Ciencia, Tecnología Y Futuro, 5(3), 5–18. https://doi.org/10.29047/01225383.45
Downloads
Download data is not yet available.
Published
2013-12-15
Issue
Section
Scientific and Technological Research Articles
