secondary recovery uses artificial drive by injecting non native material

  • Secondary recovery is the result of human intervention – either by injecting water or gas

    • for water, there are two approach i.e. water injection vs water flooding. Water injection is injection of water surrounding the reservoir to provide a “squeeze” effect
    • gas injection
      • !pic gas injection.png Private or Broken Links
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    • ==Leaky Piston Like Displacement== is the more realistic model to represent the water injection to oil production, where the majority of the oil is displaced ahead of the flood front
      • This means that you will have to do a significant water injection before seeing the results from improved oil production. It also means the liquid displacement is not 1:1 ratio.
      • Alternative to this is the Piston Like Displacement where the model assumption is that you will see impact immediately with 1:1 ratio. This is optimistic view that’s applicable only on select scenarios.

  • Tertiary recovery are techniques that are beyond what is considered conventional at a reference time

    • examples: miscible or immiscible gas flooding, chemical flooding, thermal and microbial methods

[!info] General Note on Primary, Secondary and Tertiary Recovery

  • Primary recovery uses reservoir internal pressure to push oil to the surface
  • Secondary recovery relies on water or natural gas (artificial) injection to push more oil to the surface
  • Tertiary recovery uses injection techniques that’s not current conventional and alters the PVT of the reservoir like chemical, heat or microbes to thin out the remaining oil

!pic recovery mechanism summary.png Private or Broken Links
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References

Metadata

  • topic:: 00 Petroleum Engineering00 Petroleum Engineering
    #MOC / notes on petroleum and reservoir engineering (PE/RE) including resources classification
  • updated:: 2023-01-06 Private or Broken Links
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  • reviewed:: 2023-01-06 Private or Broken Links
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  • #PermanentNote