Real-time flow injection monitoring using distributed Bragg grating

摘要

A system, method and computer-readable medium for monitoring a fluid injection at a downhole location in a wellbore is disclosed. A member is provided in the wellbore. The member includes a passage for flow of fluid and a fiber optic cable including a plurality of temperature sensitive sensors wrapped around the member. A selected temperature signal is imparted into the fluid flowing in the member. A temperature of the fluid exiting the member at the downhole location is measured using the plurality of temperature sensors. The measured temperature and the imparted temperature signal are compared to determine a flow parameter of the injected fluid.

主权项

1. A method of monitoring a fluid injection at a downhole location in a wellbore, comprising:
providing a member in the wellbore, the member including a passage for flow of fluid and a fiber optic cable including a plurality of temperature sensors wrapped around the member; imparting a selected temperature signal into the fluid flowing in the member via a heating element at an entrance of the passage; measuring a temperature of the fluid exiting the member at the downhole location using the plurality of temperature sensors at an exit of the passage; and comparing the measured temperature to the imparted temperature signal to determine a flow parameter of the injected fluid.