Simulation of Clogging in Porous Media by Pore Network Model

Razavy, Sina | 2022

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  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 55481 (06)
  4. University: Sharif University of Technology
  5. Department: Chemical and Petroleum Engineering
  6. Advisor(s): Jamshidi, Saeed; Raoof, Amir
  7. Abstract:
  8. Clogging of the pores of the porous medium occurs in different processes such as geothermal injection pumps, hydrocarbon wells, and underground water extraction wells. We need a model that can simulate these blockages in order to predict how fundamental variables of the porous medium change under different flow regimes and different particle sizes in the fluid (for example, the relationship between porosity and permeability changes). The aim is to simulate clogging in a porous medium using a pore network model. Simulations should model pore clogging and show how the permeability of the sample changes due to pore clogging. In the pore network, there are often thousands (or millions) of pores and throats. When clogging occurs, the throat size decreases and may become completely blocked. With this process, the permeability of the whole sample is reduced according to the different way that throats become clogged. In this project, by using the research conducted in the microchannels and the relationships between various variables presented in them, as well as modifying these relationships according to the data obtained by other researchers, we obtained the relationship needed to determine the closing time of the throats. Next, by designing a repeating algorithm in the simulation process using the network model, we calculated the permeability changes over time. In the end, by using this algorithm, the trend of permeability changes of different samples under different conditions were investigated.
  9. Keywords:
  10. Pore Network Model ; Separation ; Filtration ; Permeability ; Deep-bed Filtration ; Clogging ; Bottleneck

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