Effects of pore complexity on saturated P-Wave velocity and its impact in estimating critical porosity

Abstract

In Sandstone, the pore complexity in certain rock types is not only related to the mineral constituents, but also to other tectonic properties, including texture and porosity. In sandstones, texture is a primary factor contributing to pore geometry and structure. This condition causes a distributed relationship between P-wave velocity and porosity, although a clear trend exists. The purpose of this research, therefore, was to study the effects of pore complexity with the variation of P-wave velocity on saturated rocks and its impact in estimating critical porosity. In addition, the concept of rock type and convergent point was applied to establish the correlation between saturated P-wave velocity with pore geometry, and pore structure. Subsequently, the data was grouped into several rock types, with each having its own empirical bond and also tends to intersect with others at a converging point. In conclusion, a very good relationship between saturated P-wave velocity and porosity was obtained by categorizing the rocks based on pore geometry and pore structure. However, the individual rock group is known to demonstrate similar pore geometry and specific critical porosity values.