Study of the influence of anisotropy parameters on reflection coefficients from a boundary between two azimuthally anisotropic media
https://doi.org/10.18303/2619-1563-2020-2-18
Abstract
The paper considers an algorithm for calculating reflection coefficients from boundary between two HTI media. Analysis of the presence of anisotropy above and below the target boundary, as well as variations in the parameters of HTI media, was done. Interpretation of reflection data from the boundary between two HTI media with neglect of anisotropy above or below potentially leads to significant errors in estimation of symmetry axes directions, and hence fracturing orientation. Overestimation/underestimation of an elastic parameter in the overlying HTI medium could lead to a corresponding overestimation/underestimation of similar parameter in the underlying target layer in the result of AVAZ inversion. Furthermore, among the anisotropy parameters Thomsen parameter γ has most significant influence on the reflection coefficients dependences. Thus, the parameter γ could be used foremost as a result of the AVAZ inversion.
About the Authors
G. A. Dugarov
Trofimuk Institute of Petroleum Geology and Geophysics SB RAS
Russian Federation
Koptyug Ave., 3, Novosibirsk, 630090, Russia
Russian Federation
Koptyug Ave., 3, Novosibirsk, 630090, Russia
R. K. Bekrenev
Trofimuk Institute of Petroleum Geology and Geophysics SB RAS
Russian Federation
Koptyug Ave., 3, Novosibirsk, 630090, Russia
Russian Federation
Koptyug Ave., 3, Novosibirsk, 630090, Russia
T. V. Nefedkina
Trofimuk Institute of Petroleum Geology and Geophysics SB RAS
Russian Federation
Koptyug Ave., 3, Novosibirsk, 630090, Russia
Russian Federation
Koptyug Ave., 3, Novosibirsk, 630090, Russia
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Review
For citations:
Dugarov G.A., Bekrenev R.K., Nefedkina T.V. Study of the influence of anisotropy parameters on reflection coefficients from a boundary between two azimuthally anisotropic media. Russian Journal of Geophysical Technologies. 2020;(2):18-29. (In Russ.) https://doi.org/10.18303/2619-1563-2020-2-18
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