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Simulation of Acid Injection Into a Carbonate Porous Medium Using the DBS Method and Investigation of Its Compatibility with Laboratory Results

Jalalian, Elaheh | 2024

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  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 57409 (06)
  4. University: Sharif University of Technology
  5. Department: Chemical and Petroleum Engineering
  6. Advisor(s): Bazargan, Mohammad
  7. Abstract:
  8. Acidizing is a widely used well stimulation technique designed to mitigate formation damage and enhance oil and gas production. The effectiveness of acidizing operations relies on meticulous design. Consequently, before implementation, it is essential to create an optimal operational plan using suitable laboratory tools and numerical methods to maximize efficiency. Numerous studies have been conducted to investigate and model wormhole propagation in carbonate rocks, including commonly used two-scale continuum models. Although these models effectively predict physical behavior, the numerous parameters involved complicate history matching with laboratory results, potentially leading to inaccurate predictions. Furthermore, identifying these parameters necessitates costly and extensive experiments. This research presents a model that utilizes the DBS equation for pressure-velocity calculations and Whitaker’s equation for reaction modeling, yielding results that align with two-scale continuum models while requiring significantly fewer matching parameters. One advantage of this model is the reduction of computational costs during the history matching process, leading to more accurate predictions. Furthermore, these parameters can be directly obtained from rotating disk experiments. Additionally, this model can predict mass transfer-controlled and reaction kinetics-controlled flow regimes without the complexities typically associated with conventional two-scale continuum models. Subsequently, simulations were conducted to study the model’s capability in predicting different dissolution patterns including face, conical, wormhole, ramified, and uniform. Finally, this study investigates the influence of different parameters, such as reaction constants and reaction orders, on wormhole propagation, ultimately providing valuable insights for optimizing acidizing strategies in carbonate reservoirs
  9. Keywords:
  10. Acidizing Treatment ; Wormhole ; Darcy-Brinkman Model ; Reaction ; Rotating Disk Experiment ; Formation Damage ; Fractured Carbonate Reservoir

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