What is associated gas?

Associated gas is the natural gas or methane (CH4) that is produced at the associated of oil and natural gas wells.


Associated gas pressure

Associated gas pressure – pressure at the top of the well, i.e., at its associated. It is measured by pressure gauges of the associated fittings. There are static and dynamic associated gas pressures.

Static associated pressure is gauged in the abandoned well and depends on reservoir pressure, well depth and density of the filling medium. Numerically it equals the difference between reservoir pressure and hydrostatic pressure of the liquid column from associated to reservoir.

Dynamic associated pressure is measured in the operating well and depends on the same parameters as the static pressure + on the well rate or on injection agent flow rate, as well as on the pressure in the pipeline near the well and on the pressure differential in shut-off elements of the associated fittings. Excess associated pressure (versus atmospheric pressure) may reach 100 MPa and more (in gas wells, at hydraulic fracture).


Gas Gathering compressor is compulsory for each gas well. The compressor in this application is used to collect the gas from one well or several wells to boost and transport to downstream gas treatment plant. Since in most of the cases the compressors are located at or near associated and there might be no availability of civil utility such as power supply, instrument air or drain pit and furthermore heavy condensate is also contained in the gas, thus a specific solution is made for this application to satisfy the site and gas condition. Furthermore, while time goes on year by year, the gas pressure shall deplete, therefore a specific configuration is designed especially for this case.

Associated Gas Compressors are used in oil&gas field.Compressor is used for one or several gas wells.
Compressors are used to collect gas from wellhead(s) to boost and transport to downstream gas treatment plant.Compressor usually is located at or near associated(s),with compression stage from one to five.

Associated gas compressors are build on rigid structural skids,which can be removed as requirements.
We design compressors specially for customers,ensuring performance,safety and reliability of associated gas operations according to gas components and other enviromental conditions.Constantly associated gas is not clean,containing heavy condensate,water,carbon dioxide even hydrogen sulfide.We take options to meet these

These options include but not limited to:

Stainless Steel materials for piston rods and valves,
Two compartment distance pieces,
Purged packing case,
Special heat treatment for pressure vessels and welded connections...




Natural Gas Compressor  China CNG Equipment  China CNG Compressor  Natural Gas Gathering Compressor Wellhead Gas Compressor