Radial Waves In A Borehole And Stoneley Waves For Measuring Formation Permeability And Electroacoustic Constant

摘要

A Stoneley wave is generated in a borehole in a saturated porous earth formation. Measurements are made of the velocity of motion of the formation and the fluid in the formation. The difference in the velocities is indicative of formation permeability. An additional measurement of the electric field at the borehole wall enables determination of the electroacoustic constant.