Enhanced oil recovery and extending the useful producing life of existing oil fields is a hot topic at the current oil prices.

One of the methods to boost oil production in existing fields is to inject water or gas (carbon dioxide) into injection wells. This is generally considered to be a tertiary recovery method and is used after normal formation pressure and secondary techniques like gas re-injection and water floods have been used.

Water injection sweeps the oil from the injection sites to the producing wells. Carbon dioxide alters the viscosity of the oil for easier oil movement. The combination of oil, water, carbon dioxide, and natural gas is pumped out of the formation by the producing wells and separated out into its components for further injection processing, sale, or transport.

Our WAG units monitor and control the injection of water alternating with carbon dioxide at the wellhead to facilitate this recovery process from the formation. They can be configured for pressure control with a flow rate limiting option or flow rate control with a pressure limiting option to safely inject water alternating with carbon dioxide into the formation. Pressure fall off, step rate, and step pressure tests provide detailed information about the process to assist the production engineers in optimizing the injection characteristics for a particular formation.

Support for a control valve and an emergency shutdown valve is provided. Manual overrides of valve position are permitted. Support for direct turbine meter inputs and Wedge Meter® or Coin Meter® Flow Measurement for CO2 and H2O is provided. The Fast WAG option on some units allows fully automated injection with interlocked valves.

The units can be solar powered.