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Abstract

Summary

In this work we have used commercial software to perform reactive transport simulations of CO2 WAG injection in an oil reservoir, with the objective of assessing the scaling risk associated with CO2 EOR in carbonate formations. Higher WAG ratio promotes faster mineral reactions and severe scale deposition at earlier times. Injection of cooler fluids also enhances calcite and CO2 dissolution in water near the injector wellbore. Finally, the mass of calcite around the producer wellbore changes due to three different mechanisms: (a) brief dissolution caused by arrival of the CO2-rich front, (b) re-precipitation caused by mixing between high HCO3 injected water with high Ca formation water and (c) continuous precipitation caused by evolution of CO2 along the flow path, which occurs continuously after CO2 breakthrough. The results of these calculations allow the critical location where scale damage could occur within a production system to be identified, and a mitigation strategy developed to control its formation, for example via continual injection of scale inhibitor down to the production packer in early field life, reducing the need for batch inhibitor (squeeze) treatments into the reservoir in later field life, thereby significantly reducing OPEX.

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/content/papers/10.3997/2214-4609.201700302
2017-04-24
2020-05-29
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References

  1. André, L., Audigane, P., Azaroual, M. and Menjoz, A.
    , 2007. Numerical modeling of fluid-rock chemical interactions at supercritical CO2−liquids interface during CO2 injection into a carbonate reservoir, the Dogger aquifer (Paris Basin, France). Energy Conversion & Management, 48, 1782–1797.
    [Google Scholar]
  2. Jordan, M.M., Sorbie, K.S., Jiang, P., Yuan, M.D., Todd, A.C. and Hourston, K.E.
    : “Scale Inhibitor Adsorption/ Desorption and the Potential for Formation Damage in Reconditioned Field Core,” presented at the SPE International Symposium on Formation Damage Control, Lafayette, Louisiana, 7–10 February 1994.
    [Google Scholar]
  3. Jordan, M.M., Sorbie, K.S., Griffin, P., Hennessey, S. Houston, K.E. and Waterhouse, P.
    : “Scale Inhibitor Adsorption/Desorption vs. Precipitation: The Potential for Extending Squeeze Life While Minimising Formation Damage,” SPE 30106, presented at the European Formation Damage Conference, Hague, Netherlands, 15–16 May 1995.
    [Google Scholar]
  4. Mackay, E.J. and Jordan, M.M.
    : “SQUEEZE Modelling: Treatment Design and Case Histories” paper SPE 82227, presented at the SPE European Formation Damage Conference, The Hague, The Netherlands, 13–14 May 2003.
    [Google Scholar]
  5. Mackay, E. and Martins de Souza, A. P.
    : “Modelling of CO2 and Seawater Injection in Carbonate Reservoirs to Evaluate Inorganic Scaling Risk,” presented at the SPE International Oilfield Scale Conference and Exhibition, Aberdeen, Scotland, 14–15 May 2014.
    [Google Scholar]
  6. Qiao, C., Li, L., Johns, R. T. and Xu, J.
    , 2016. Compositional Modeling of Dissolution-Induced Injectivity Alteration During CO2 Flooding in Carbonate Reservoirs. SPE Journal (June). SPE-170930-PA
    [Google Scholar]
  7. Ribeiro, A., Mackay, E. J. and Guimarães, L.
    : “Predicting Calcite Scaling Risk Due to Dissolution and Re-Precipitation in Carbonate Reservoirs During CO2 Injection,” presented at the SPE International Oilfield Scale Conference and Exhibition, Aberdeen, Scotland, 11–12 May 2016.
    [Google Scholar]
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