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f Borehole Images and VSPs as Aid to Attribute and Inversion Analysis
- Publisher: European Association of Geoscientists & Engineers
- Source: Conference Proceedings, PGCE 2008, Jan 2008, cp-258-00066
Abstract
Borehole images have inherent information on sedimentary structure and lithofacies that are typically used qualitatively. There are ways of unlocking this potential by doing a comprehensive facies analysis and obtaining quantitative outputs with new applications like neural network or multivariate histogram techniques. However even with these approaches the high-resolution quantitative facies data is still only at the borehole, capturing near-wellbore characteristics which are difficult to translate and propagate into the interwell space. Needed at this critical barrier, is a tool to tie-in high-resolution borehole image and log derived facies with something that will also have a correlation with attributes that characterize the interwell and 3D-space. We test rock-physics attributes like acoustic impedance and Poisson’s-ratio and attributes generated from vertical seismic profiles (VSP) as being the likely links between high-resolution near-borehole information and interwell/3D space represented by seismic data.