A method of measuring the velocity of liquid flow

摘要

A method of measuring the velocities of water volumes flowing co-directionally in separate conduits (14, 18) nested such as in injection or production well-bores allows an oxygen activation measurement of the velocity of the water flow in the tubing-casing annulus (20) in the presence of water flowing in the tubing string in the same direction. The method provides continuous logging at variable or constant cable velocities or stationary logging. Based on the method of velocity gauging, the method isolates the signal from the annular flow and can produce a continuous log of linear and volumetric annular flow rates with depth.