Fracture characterization at the Conoco Borehole Test Facility using shear-wave anisotropy
Conference
·
OSTI ID:542871
- Univ. of Edinburgh (United Kingdom)
Two multi-component near-offset VSP experiments are used, in conjunction with borehole data, to characterise the subsurface fracture system at the Conoco Borehole Test Facility, Oklahoma. Time delays between the fast and slow split shear-waves are observed to correlate with the heavily fractured sandstone formations. Inversion of the shear-wave splitting estimates is achieved using a Genetic Algorithm which incorporates an anisotropic ray tracing scheme. The inversion results suggest that the fracture orientation is sub-vertical. A method of determining fracture dip using an opposite azimuth VSP method is suggested.
- OSTI ID:
- 542871
- Report Number(s):
- CONF-951013--
- Country of Publication:
- United States
- Language:
- English
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