Abstract
The Connolly (1999) elastic impedance (EI) equation is a function of P-wave velocity, S-wave velocity, density, and incidence angle. Conventional inversion methods based on this equation can only extract P-velocity, S-velocity, and density data directly and the elastic impedance at different incidence angles are not at the same scale, which makes comparison difficult. We propose a new elastic impedance equation based on the Gray et al. (1999) Zoeppritz approximation using Lamé parameters to address the conventional inversion method’s deficiencies. This equation has been normalized to unify the elastic impedance dimensions at different angles and used for inversion. Lamé parameters can be extracted directly from the elastic impedance data obtained from inversion using the linear relation between Lamé parameters and elastic impedance. The application example shows that the elastic parameters extracted using this new method are more stable and correct and can recover the reservoir information very well. The new method is an improvement on the conventional method based on Connolly’s equation.
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References
Connolly, P., 1999, Elastic impedance: The Leading Edge, 18(4), 438–452.
Dufour, J., and Goodway, B., 1998, AVO analysis to extract rock parameters on the Blackfoot 3C-3D seismic data: 68th Ann. Internat. Mtg., Soc. Expl. Geophys., Expanded Abstracts, 174–177.
Gray, D., 2002, Elastic inversion for Lame parameters: 72th Ann. Internat. Mtg., Soc. Expl. Geophys., Expanded Abstracts, 697–700.
Gray, F. D., and Andersen, E. A., 2000, The application of AVO and inversion to formation properties: World Oil, 221 (7).
Gray, D., Goodway, B., and Chen, T., 1999, Bridging the gap: Using AVO to detect changes in fundamental elastic constants: 69th Ann. Internat. Mtg., Soc. Expl. Geophys. Expanded Abstracts, 852–855.
Wang Baoli, Yin Xingyao, and Zhang Fanchang, 2005, Elastic impedance inversion and its application: Process in Geophysics, 20(1), 89–92.
Whitcombe, D. N., 2002, Elastic impedance normalization: Geophysics, 67(1), 60–62.
Yin Xingyao, Yuan Shihong, and Zhang Fanchang. 2004, Extracting petrophysical parameters from elastic impedance: Expanded Abstracts CPS/SEG 2004 International Geophysical Conference. 538–542.
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Wang Baoli graduated with a Bachelor’s degree in Prospecting Information and Engineering from the China University of Petroleum (East China) in 2004 and earned her Master’s degree from the department of Geophysical Prospecting and Information Technology in the China University of Petroleum ((East China) in 2006. She now studies for her PhD at the China University of Petroleum (East China). Her research interest is elastic impedance inversion.
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Baoli, W., Xingyao, Y. & Fanchang, Z. Lamé parameters inversion based on elastic impedance and its application. Appl. Geophys. 3, 174–178 (2006). https://doi.org/10.1007/s11770-006-0026-z
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DOI: https://doi.org/10.1007/s11770-006-0026-z