Sonic logging is a well logging tool that provides a formation’s interval transit time, designated as, which is a measure of a formation’s capacity to transmit seismic waves. Geologically, this capacity varies with lithology and rock textures, most notably decreasing with an increasing effective porosity. This means that a sonic log can be used to calculate the porosity of a formation if the seismic velocity of the rock matrix, and pore fluid, are known, which is very useful for hydrocarbon exploration.
Read more about Sonic Logging: Process of Sonic Logging, Cycle Skipping, Calculating Porosity, Accuracy, Use in Mineral Exploration, See Also