Patent ID: 8573313

Claim:
A method of introducing a fiber optic tether into a wellbore proximate a reservoir, comprising: performing a well operation by pumping at least a first treatment fluid through the wellbore and into the reservoir; propelling the fiber optic tether into the wellbore without a well control stack, the fiber optic tether being propelled into the wellbore by controlling the pumping of the first treatment fluid and controlling a powered reel, the reel being internal to a pressurized housing connected to a wellhead of the wellbore; performing a treatment operation with at least a second treatment fluid; and sensing downhole data related to a wellbore condition with the fiber optic tether while the fiber optic tether is propelled into the wellbore and while performing the treatment operation, the downhole data used to control the propelling of the fiber optic tether and at least a portion of the treatment operation.