System and method for determining downhole fluid parameters

A system to determine a parameter of a fluid in a well, the system comprising:

• a downhole system deployable into the well, wherein the downhole system comprises a coiled tubing system having an injection tool with an injection port for injecting the fluid into the well;
• and
• a plurality of sensor elements to measure a parameter of the fluid in the well, each of the sensor elements comprising:
• a base positionable on the downhole system;
• and
• a plurality of sensors coupled to the sensor base, wherein the sensors are thermally isolated from each other and each of the sensors is operable as both a heater to heat the fluid and as a temperature sensor to measure a temperature of the fluid, the sensors are operatively interchangeable to selectively heat and measure the temperature of the fluid to determine at least one parameter of the fluid.

A method for determining a parameter of a fluid in a well, the method comprising:

• deploying a downhole system into the well with a plurality of sensor elements thereon, each of the plurality of sensor elements comprising a heater and a temperature sensor;
• taking a primary fluid measurement of the fluid in the well with a first portion of the plurality of sensor elements operating as a heater and a second portion of the plurality of sensor elements operating as a temperature sensor;
• taking a secondary fluid measurement of the fluid in the well with the second portion of the plurality of sensor elements operating as a heater and the first portion of the plurality of sensor elements operating as a temperature sensor;
• and
• determining a flow direction or a velocity of the fluid based on the primary and secondary fluid measurements.