9-C seismic VVAZ in HTI media: A synthetic study on the Niobrara Reservoir
- Samara Omar (Colorado School of Mines) | Jim Simmons (Colorado School of Mines)
- Document ID
- Society of Exploration Geophysicists
- 2018 SEG International Exposition and Annual Meeting, 14-19 October, Anaheim, California, USA
- Publication Date
- Document Type
- Conference Paper
- 2018. Society of Exploration Geophysicists
- Multicomponent, Fractures, Anisotropy, Shear wave (S-wave), Modeling
- 0 in the last 30 days
- 20 since 2007
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Azimuthal anisotropy associated with horizontally transverse isotropic media (HTI) causes waves to propagate with different velocities in different azimuthal directions. Compressional (P-wave) velocity variation with azimuth (VVAZ) occurs only at the far offsets and is less sensitive to thin anisotropic layers. The converted and shear wave VVAZ is complementary to the P-wave response and are more sensitive to azimuthal anisotropy at all offsets. In addition to reducing the ambiguity of a single P-wave interpretation, the converted (C-wave) and shear (S-wave) components show measurable differences in the VVAZ response with changing thickness of the HTI medium.
This added value of 9-C data is evidenced by reflectivity modeling of simple Niobrara stratigraphy with varying thicknesses of the HTI interval. Observations are made on common-offset, common-azimuth gathers and limited azimuth stacks for data rotated into the radial-transverse coordinate system.
Presentation Date: Tuesday, October 16, 2018
Start Time: 8:30:00 AM
Location: 213A (Anaheim Convention Center)
Presentation Type: Oral
|File Size||530 KB||Number of Pages||5|
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