Abstract
Landrø (2001) used in his approach the amplitude‐versus‐offset (AVO) techniques to distinguish between effects of pore pressure and water saturation, and to quantify the changes in fluid‐solid media over time. Meadows (2001) presented two improvements to this method. In this paper, we suggest a new approach to fit the relation between effective stress variations (resulting from overburden stress and pore pressure) and changes in seismic impedance. We also improve Meadows's (2001) second approach, where the changes in pore pressure and water saturation are inverted from impedances instead from intercept and gradient. In our approach we are able to quantify more accurately the changes in effective stress and water saturation.
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