In addition to the numerous process and pipeline applications FourQuest Energy also provides a wide range of down-hole Nitrogen Services. The following list outlines some of the services we are able to provide.
Well Cleanouts: Displacement of wellbore fluids to the surface using N2 to pressurize down through the annulus forcing the returns up through the tubing to surface.
Gas Lift: Use of Nitrogen gas injection designed to commingle with produced fluids to prevent the wellbore from loading up and stopping flow.
Stuck Drill Pipe: High pressure nitrogen can be used in cases where drill pipe becomes differentially stuck against highly permeable formations. It is common to use N2 to lower hydrostatic head and allow for freeing of the drill string.
Underbalanced Drilling: Commingling of Nitrogen and drilling fluids to keep the hydrostatic head low and prevent loss of drilling fluids into low pressure formations during drilling operations.
Nitrified Fluid Injection: Injection of stimulation chemicals into formation with a Nitrogen assist used to expand the reach and dispersion of the chemistry (foamed treatments). Also aids in fluid recovery from the formation by providing large energy source for flow-back.
Well Integrity Testing: Used in conjunction with wire-line to manage and measure fluid/gas interface in wells. A major tool used locating casing or tubular leaks.
Fracturing Applications: High pressure and high rate Nitrogen can be used in fracturing operations to reduce fluid requirements and to enhance flow-back of stimulation fluids. This can greatly enhance well clean-up following fracturing treatments.
Coil Tubing Operations: Nitrogen gas is a key tool in practically all Coil Tubing operations from displacing treatment chemicals, acids or solvents into the formation. Also used in well fluid displacements and cleaning out the CTU string following well treatments.
Pressure Testing: The use of Nitrogen gas is common for integrity and surface equipment tests. The presence of any leaks during this testing process can be confirmed using helium leak detection or sonic leak testing.
Well Displacement: Nitrogen gas is commonly used for the displacement of wellbore fluids into formation.
Well Injection Testing: Nitrogen injection can be used to measure permeability and well flow characteristics.
Foamed Cement Operations: Nitrogen gas injection is commonly used during cementing operations to lighten the cement slurry blend and reduce the hydrostatic head of the column. This reduces the possibility that the weight of the cement column will break down low pressure zones and leak off.
