APPLICATION COMMON REFLECTION SURFACE AS REGULARIZATION METHOD TO VELOCITY VARIATION WITH AZIMUTH (VVAZ) INVERSION OF NARROW AZIMUTH LAND 3D SEISMIC DATA
The orientation and intensity of fracture are increasingly becoming vital properties in exploration and development field, especially related to basement reservoir lead and prospect or other play types which related to them. Velocity variation with azimuth (VVAz) is well-known as method to estima...
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| Format: | Theses |
| Language: | Indonesia |
| Online Access: | https://digilib.itb.ac.id/gdl/view/48248 |
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| Institution: | Institut Teknologi Bandung |
| Language: | Indonesia |
| Summary: | The orientation and intensity of fracture are increasingly becoming vital properties
in exploration and development field, especially related to basement reservoir lead
and prospect or other play types which related to them. Velocity variation with
azimuth (VVAz) is well-known as method to estimate the properties. This method is
widespread interest due to capability to predict the properties based on seismic
data without well constraint in inversion process. Despite this interest, the method
require a rich-azimuth 3D seismic data that is rarely owned by company. This thesis
present a new approach to VVAz inversion using narrow azimuth 3D seismic data
regulated by common reflection surface (CRS) to enhance the conventional data
with relatively low folds in COV. To validate our idea, we applied the methodology
to 3D full elastic anisotropy synthetic data and analyzed it. Then similar sequence
processing, we applied to real seismic data. Our result on synthetic data show that
inversion after regularization keep the preservation of amplitude versus offset
(AVO) and VVAz anomalies equal to synthetic model. Moreover, a significant
positive correlation between fracture intensity of FMI and real seismic data with
coefficient correlation above 0.92 is obtained. Therefore, CRS is able to be used as
regularization method to VVAz inversion of narrow azimuth 3D seismic data. |
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