absolute permeabilityA measure of the ability of a single fluid(such as water, gas or oil) to flow through a rock formation when the formation is totally filled with that fluid. The permeability measure of a rock filled with a single fluid is different from the permeability measure of the same rock filled with two or more fluids.accreteto enlarge by the addition of external parts or particles.acidizeto treat oil-bearing limestone or other formations with acid for the purpose of increasing productionacoustic loga record of the measurement of porosity, done by comparing the depth to the time it takes for a sonic impulse to travel through a given length of formation. Synonym sonic loggingacoustic surveya well-logging method in which sound impulses are generated and transmitted into the formations opposite the wellbore.