Components of a Gas Injection Unit

A gas injection unit typically consists of the following key components:

1. Gas Compressor:

• The heart of the gas injection unit, the compressor increases the pressure of the gas to the level required for injection into the well.

• Compressors can be reciprocating, centrifugal, or screw-type, depending on the volume and pressure requirements.

2. Gas Source:

• The gas used for injection is often sourced from the produced gas from the same field or nearby wells. It can also come from a gas processing plant or pipeline.

• The gas must be clean and free of liquids or solids to avoid damaging the compressor or well equipment.

3. Cooling System:

• Compressing gas generates heat, so a cooling system is used to lower the temperature of the gas after compression.

• This ensures the gas is at an optimal temperature for injection and prevents damage to downstream equipment.

4. Filters and Separators:

• Filters remove any impurities, such as dust, liquids, or solids, from the gas before it enters the compressor.

• Separators are used to remove any liquid hydrocarbons or water that may be present in the gas stream.

5. Control System:

• A control system monitors and regulates the gas injection process, including pressure, flow rate, and temperature.

• It ensures the gas is injected at the correct rate and pressure to optimize production.

6. Injection Lines and Valves:

• High-pressure pipelines transport the compressed gas from the compressor to the wellhead.

• Gas lift valves or injection valves control the flow of gas into the well at the desired depth.

7. Metering System:

• Flow meters measure the volume of gas being injected into the well, ensuring accurate control and optimization of the gas lift process.