#TITLE_ALTERNATIVE#
<p align="justify">Most of research in geophysics had been carried out based on isotropy assumptions. This assumption can lead to error if the medium known as anisotropic medium. Therefore, we need to apply seismic anisotropy assumption to solve such problem. Since seismic anisotropy...
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| Format: | Final Project |
| Language: | Indonesia |
| Online Access: | https://digilib.itb.ac.id/gdl/view/29062 |
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| Institution: | Institut Teknologi Bandung |
| Language: | Indonesia |
| Summary: | <p align="justify">Most of research in geophysics had been carried out based on isotropy assumptions. This assumption can lead to error if the medium known as anisotropic medium. Therefore, we need to apply seismic anisotropy assumption to solve such problem. Since seismic anisotropy equation for P-wave consists of two parameters δ and ε then we need to find them out first. A new method is proposed using velocity information instead of amplitude. It was called Velocity Variation with Offset (VVO) or Angle (VVA) method. The basic idea of such method is seismic anisotropy equation provided by Thomsen (1986). Through VVO method, δ and ε values can be estimated. VVO method is performed on synthetic seismic data from geological model with known anisotropic zone as interest target. The model has been designed with certain δ and ε values. Hockey stick phenomenon appears in the NMO'ed gathers within anisotropic zone. Parameters anisotropy δ and ε then could be derived from such hockey stick phenomenon. <br />
Using linearization and elliptical approach (Supriyono et.al, 2011), δ and ε can be derived. The estimation shows good enough result. The parameters anisotropy derived through VVO method is similar enough to both δ and ε from the model. Therefore, VVO method is accurate enough in estimation of parameters anisotropy.<p align="justify"> |
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