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Implementation of Darcy-Brinkman-Stokes Model for Simulation of Acid, Gel Acid and Visco-Elastic-Surfactant (VES) Acid Injection into a Carbonate Core

Alizadeh Kiapi, Mohammad Reza | 2019

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  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 52990 (06)
  4. University: Sharif University of Technology
  5. Department: Chemical and Petroleum Engineering
  6. Advisor(s): Fatemi, Mobeen; Bazargan, Mohammad
  7. Abstract:
  8. In this work, an improved model for simulating carbonate core acidizing, with the ability of correctly modeling fluid diversion in dual-core experiments is created based on an existing two-scale continuum model. The improvements are applied on the momentum transfer equation, continuity equation, pore-scale structure-property relations and fluid rheology model. Also a more realistic injection scenario and geometry configuration are presented for simulating the diversion experiments. The Darcy-Brinkman-Stokes equation is implemented instead of Darcy’s equation and the continuity equation is modified by adding the mass source term. A global rheology model is developed capable of capturing exact behavior of various types of acid (Newtonian acids, gel-acids and visco-elastic-surfactant acids). The simulations are sequential-implicit and performed using OpenFOAM. The numerical aspects of our simulations are validated with accepted computational studies in the literature and the consistency of the applied modifications are verified qualitatively based on theoretical considerations and empirical observations. The effects of these modifications on the results are then studied and compared with those of the previous models. Also the presented model is finally used to find an optimized injection scenario to achieve an efficient diversion
  9. Keywords:
  10. Wormhole ; Simulation ; Optimization ; Acidizing Treatment ; Rheological Model ; Diversion Mechanism ; Darcy-Brinkman Model ; Viscoelastic Surfactant (VES)

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