Compressional modulus fluids

Film Elasticity The differential change in surface tension of a surface film with relative change in area. Also termed surface elasticity, dilata-tional elasticity, areal elasticity, compressional modulus, surface dilata-tional modulus, or modulus of surface elasticity. For fluid films, the surface tension of one surface is used. The Gibbs film (surface) elasticity is the equilibrium value. If the surface tension is dynamic (time-dependent) in character, then for nonequilibrium values, the term Marangoni film... 

Where K, is the modulus of the solid grain, is porosity, and c is a consolidation parameter that represents the sediments and fluid inside the vugs (unconsolidated material). We use c = 200. The effective compressional modulus (harmonic average of the Ki and /fj drained moduli) and the shear bulk modulus, G, of the double porosity medium can be obtained, respectively, from... 

Bound models Voigt-Reuss-Hashin For a two-component layered model (solid, fluid), the elastic moduli (compressional modulus, shear modulus) are calculated as a function of fluid volume fraction (porosity) based on the model of Voigt (upper bound) and Reuss (lower bound), and the Voigt-Reuss-Hill mean value. The velocities are calculated with density. 

Gassmann. The worksheet allows a fluid replacement based on Gassmann s equation. Input compressional and shear wave velocity measured for rock saturated with fluid 1, porosity, compressional modulus, and density of fluid 1 and fluid 2. Output compressional and shear wave velocity for the rock saturated with fluid 2. 

Pore fluids (gas, oil, and water) usually have distinct ranges of compressional or bulk modulus (shear modulus of fluids is zero). For orientation, the following ranges are given for compressional bulk modulus and density Pfi,iid ... 

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