The Capacitance/Temperature/Flow (CTF) combines a single electronics section with 3 sensors – water hold-up, fast response temperature and optimised flowmeter into a single compact tool.
Capacitance Water Hold-up: Hydrocarbons and water have different dielectric constants and the probe responds to the dielectric constant of the fluid in the well. From this the downhole water-hydrocarbon ratio can be derived.
Temperature: The platinum-resistance probe responds quickly and accurately to changes in fluid temperature.
Flowmeter electronics: Interchangeable spinner mechanical sections are fitted to the bottom of the CTF to match the well conditions and optimise flow measurements.