How to model CO2 properties such as velocity at deeper depth say 30 Km?

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Bastien Dupuy

You can compute the CO2 properties depending on pressure and temperature using Span and Wagner equations. From CO2 bulk modulus and density you can compute the P-wave velocity of CO2. If you want to compute the velocity of a saturated or partially saturated rock with CO2, you need to plug the CO2 properties (bulk modulus, density and viscosity) in Biot-Gassmann theory (or variants) and you will be able to derive viscoelastic properties.

Shib Sankar Ganguli

Thanks Bastien

Infact I was using the empirical equations by Span & Wagner 1996, but I could not manage to obtain the bulk modulus. Coul you please tell me how to get bulk modulus using Span & Wagner ?