Method for borehole conductivity profiling

摘要

A method of using an everting borehole liner to perform fluid conductivity measurements in materials surrounding a pipe, tube, or conduit, such as a borehole below the surface of the Earth. A flexible liner is everted (turned inside out) into the borehole by introducing into the liner a pressurized driving fluid. As the liner displaces the ambient fluid in the borehole into the surrounding formation, the varying rate at which driving fluid is introduced into the liner is monitored and recorded. As the impermeable liner covers the flow paths in the wall of the hole, the rate at which driving fluid must be introduced slows. From the measured driving fluid introduction rate, the flow rates out discrete sections of the borehole are determined.