| Autor: |
Mathilde Tiennot, Yves Guéguen, S. Wang, Jan V. M. Borgomano, H. Yin, Jérôme Fortin |
| Rok vydání: |
2021 |
| Předmět: |
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| Zdroj: |
82nd EAGE Annual Conference & Exhibition. |
| DOI: |
10.3997/2214-4609.202011244 |
| Popis: |
Summary A clay-rich Thuringian sandstone is measured under dry and water saturated conditions in a broad frequency band by combining the forced oscillation and ultrasonic transmission methods. There are no dispersion and attenuation for dry elastic moduli at seismic frequencies, but clear dispersion and attenuation for sample under water saturated condition. The frequency dependence of bulk modulus can be well estimated by a one-dimensional poroelastic model indicating that the measured dispersion and associated attenuation at seismic frequencies are mainly attributed to the drained/undrained transition. The Gassmann’s predictions work well for the measured bulk modulus, but not for the derived shear modulus. The observed shear weakening is likely caused by the reduction for shear modulus of the clay minerals. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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