Tune your intermittent gas lift injection based on well inflow instead of non-adjustable Pilot Valve injection
Instead of upsetting a gas lift distribution system by intermittently blowing it down into the casing of a gas lifted well, the practice of installing pilot valves has been widely adopted. This practice was reasonable for the steady state production of a vertical well, as the volume of gas stored in the casing annulus is fixed based on the opening and closing pressure settings. Changing the volume of gas discharged from the casing into the tubing through the pilot valve is only accomplished by pulling the valve and changing the open / close setpoints.
Experience taught that flow from horizontal wells is dependent upon well geometry, and that slug flow from the lateral into the vertical section is the norm. Since liquid rates are not regular, the amount of gas required to lift the liquid must be adjusted proportionally.
Our patented solution utilizes a surface vessel to accumulate gas during “Off” cycles while monitoring tubing and casing differential pressures to gauge liquid entry. The control system will set the opening and closing pressures of the surface valve and the rate that the surface vessel is filled, allowing an optimized injection volume each cycle.
Experience taught that flow from horizontal wells is dependent upon well geometry, and that slug flow from the lateral into the vertical section is the norm. Since liquid rates are not regular, the amount of gas required to lift the liquid must be adjusted proportionally.
Our patented solution utilizes a surface vessel to accumulate gas during “Off” cycles while monitoring tubing and casing differential pressures to gauge liquid entry. The control system will set the opening and closing pressures of the surface valve and the rate that the surface vessel is filled, allowing an optimized injection volume each cycle.
Reduce Injection Volumes
Intermittent Gas Injection is known for reducing the overall amount of injection gas required to produce a well. When combined with plunger lift, even greater reductions are possible.
More efficient use of injection gas reduces compression requirements, compression expenses, and reduces greenhouse gas emissions. |