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Modeling of Reactive Flow in Carbonate Rocks with Continuum Approach from Pore Scale to Core Scale

Zarei Darmian, Jamil | 2021

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  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 54352 (06)
  4. University: Sharif University of Technology
  5. Department: Chemical and Petroleum Engineering
  6. Advisor(s): Ayatollahi, Shahabeddin
  7. Abstract:
  8. Carbonate reservoir acidizing is one of the most important well stimulation operations that has been widely used in recent years. Modeling the operation prior to any laboratory tests has always been one of the motivations of scientists in recent years due to the complexity of modeling to consider both mass transfer and reaction phenomena. There are several models have been proposed to simulate the acid injection process in carbonate rocks in recent years, the most important one is the Two-Scale Continuum Model (TSCM). This model utilizes the combination of Darcy-scale transfer and reaction equations and a series of pore scale relations to investigate acid injection into two-dimensional cores. The unique features of this model caused many challenges which paved the road for more improvement in recent years. In this work, after reviewing the previous works in this regard, a comprehensive model has been proposed that covers the complex rock properties, correcting the continuity equation to a more complex one and momentum equation to Darcy-Brinkman-Stokes (DBS). In addition, a series of other parameters have been proposed here to improve the performance of the model and generalization of the technique. OpenFoam v8.0 was utilized here to implement the model to be applied for several different conditions. The emphasis of modeling is on using this model for different geometries in the pore and core scale where the results can be compared with the previous modeling and laboratory tests. Besides, the model has been upgraded for systems consisting of two minerals and the attempt has been also made to perform a complete sensitivity analysis on the effective parameters. The results obtained in the validation section show that the suggested model, like the previous outstanding models, predicts the same optimum acid injection rate and the pore volume at breakthrough (PVBT) at optimum velocity is also close to mentioned validation results. The model also has a good ability in predicting experimental results
  9. Keywords:
  10. Two-Scale Continuum Model ; Reservoirs Acidizing ; Plug ; Reactive Flow ; Pore-Scale Model ; Continuum Mechanics ; Micro Continuum Model ; Core-Scale

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