Conceptual Modelling of Fluid-rock Interaction Effects on Elastic Properties in Carbonate Rocks

摘要

The elastic moduli of carbonate rocks are mainly affected by the fluid content in the rock, mineralogy, porosity and pore types i.e. shapes and sizes. Carbonate minerals can have a high chemical potential and may under fluid substitution react with the introduced fluid on a short time scale. Observed shear modulus weakening is an indication that such an effect has taken place and where the fluid softens the solid surrounding the pores. A conceptual model for taking into account such effects is discussed along with numerical examples.