The unique effect of internal pore characteristics on P-wave velocity variations and rock quality

Abstract

How the effect of internal pore characteristics on acoustic wave velocity variation is still being debated by researchers. Especially in limestone where the deposition and diagenetic processes are very influential on the pore size and pore complexity formed. Pore size and pore complexity are the main factors that determine porosity and permeability. This research is intended to obtain the relation of pore complexity to the variation of acoustic wave velocity so that the rock grouping based on its quality can be done. The pore geometry, pore structure, critical porosity and Kozeny's constant are used to describe the effect of internal pore characteristics on rock quality and acoustic wave velocity. These parameters are simply defined based on porosity, permeability and acoustic wave velocity. Based on the concept of power law, groups of rocks of similar quality can be identified from the parameters of critical porosity, FZI and Kozeny Constants. If applied to the relationship of P-wave velocity with porosity, identification of rock quality can be done well based on critical porosity and Kozeny Constant.