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Fenster schliessen

AVO stands for and is

Amplitude Vs Offest

analyses the effect of incidence angle on the seismic amplitude.

Fenster schliessen

What do Gassman's equations do?

They relate a materials resistance to compression (bulk modulus) to its compositional makeup .

Fenster schliessen

What do Gassmann's equations take into account?

the properties of the rocks matrix, pore space and pore fluids

Fenster schliessen

In order to allow the estimation of changes in seismic velocity that result from changes in pore fluid you neewd to.

Calculate the bulk modulus of a saturated rock.

Fenster schliessen

Bulk Modulus


resistance to compression

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Poisson’s Ratio

Vp/Vs or  σ

Measure of incompressibility

Fenster schliessen

How can we limit the possible values of rock properties resulting from the strucutre of the pore space

Use theory to estimate upper and lower bounds of the elastic moduli

Fenster schliessen

In order to simulate elastic media need to know


• Volume fractions of constituents • Elastic moduli of various constituents • Geometric details of relationships between constituents, how rock stuck together – rock frame