What is it about?
stress associated velocity variations
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Why is it important?
Pore pressure and tectonic-stress variations play major roles in triggering earthquakes, safe drilling, and efficient reservoir exploitation. Elastic wave velocities and elastic moduli variation are used to monitor the changes in the subsurface pore pressure and tectonic stresses
Perspectives
The conventional acoustoelasticity encounters problems of divergence in describing stress-induced velocity variations and limitless elastic wave velocities for higher effective stresses. The key to these problems lies in the elastic constants that have been changed indirectly by higher effective stresses, but are still treated as unchanged in computation. In general, loading stress enhances strain energy, causing an increase of elastic wave velocities. On the other hand, stress loading could induce frame-related attenuation and therefore decrease the original stiffness of porous rocks, which makes the elastic constants decrease quickly. The resulting elastic wave velocities are limited, especially for higher effective stresses.
Bo-Ye Fu
Read the Original
This page is a summary of: Poro-acoustoelastic constants based on Padé approximation, The Journal of the Acoustical Society of America, November 2017, Acoustical Society of America (ASA),
DOI: 10.1121/1.5009459.
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