Micro-porosity effect on sonic velocity in carbonate rocks

In carbonate rocks, the rock frame and pore space are a function of the depositional environment and the diagenetic history. Cementation, recrystallisation and dissolution processes can change the mineralogy and texture of the original framework and hereby alter the original grain-to-grain contacts and/or occlude pore space. These diagenetic alterations and associated changes of the rock frame and pore structure result in a wide velocity range at a given porosity.