Enhanced Oil Recovery (EOR)

  • What is enhanced oil recovery
    What is Enhanced Oil Recovery?
    Field Production Declines
    Field Production Declines
    Boost Production
    Boost Production
    Injection
    Injected
    Recaptured
    Recaptured
  • What is enhanced oil recovery

    What is Enhanced Oil Recovery?

    A natural gas injection application is one of many enhanced oil recovery methods. By injecting natural gas into an oil reservoir, the reservoir pressure increases to maintain the desired production level.



    Field Production Declines

    Field Production Declines

    Over time, mature oil field formations often experience production decline.



    Boost Production

    Boost Production

    To boost production, associated natural gas or waste gases are injected through gas injection wells at high pressures into the formation.



    Injection

    Injected

    The injected gas pressure in the formation builds high enough to force oil and gas to the surface through oil producing wells.



    Recaptured

    Recaptured

    The gas produced is recaptured and re-injected, and the oil produced is collected for further processing and refining.




  • Natural Gas Injection

    A natural gas injection application is one of many enhanced oil recovery methods.

    How It Works

    By injecting natural gas into an oil reservoir, the reservoir pressure increases to maintain the desired production level.

    • Over time, mature oil field formations often experience production decline.
    • To boost production, associated natural gases are injected through gas injection wells at high pressures into the formation.
    • The injected gas pressure in the formation builds high enough to force oil and gas to the surface through oil producing wells.
    • The gas produced is recaptured and re-injected, and the oil produced is collected for further processing and refining.

     


  • Fireflood Method

    Fireflood is a thermal recovery method which introduces heat into heavy oil or an underperforming reservoir to enhance oil flow.

    How It Works

    • A flame front is generated in the reservoir by igniting a fire at the bore of an injection well. Continuous injection of air or other gas mixtures with high oxygen content will maintain the flame.
    • The fire will eventually move through the reservoir, and toward the production wells.
    • The heat from the fire reduces oil viscosity and helps vaporize any water in the reservoir into steam.
    • This steam, mixed the combustion gas and a bank of distilled solvent all act to drive oil in front of the fire, and toward production wells.

  • Gas Lift Method

    Gas lift is an artificial lift method used primarily during the early phases of oil production, as opposed to the EOR methods used primarily during the mature stages of the oil well. Gas lift is the controlled injection of gas into oil as it enters the production tubing. 

    How It Works

    Reciprocating compressors are commonly used in gas lift applications on wells with heavier oil. Gas is introduced into the oil stream to expand and lighten the oil, causing the oil to flow more easily through the well casing to the surface. 

    • Natural gas is compressed and injected at a high pressure from the compressor through the well casing annulus.
    • While being injected, gas bubbles are introduced into the oil stream, producing a lower viscosity of fluid.
    • The gas lightens and propels the liquid to the surface, allowing oil in the reservoir to move more freely with less restriction.

  • Special Needs for Enhanced Oil Recovery Applications

    Ariel offers application specific components, engineered to ensure the performance, safety, and reliability of your enhanced oil recovery operation.

    Gas Injection often requires higher final discharge pressures. Forged steel cylinders are applied for the final stage of compression for the higher applied injection pressures.