Modeling Aphron-Based Drillng Fluid Penetration Rate into the Reservoir Formation and Analyzing the Permeability Change Behavior

Rahimi, Mohammad Amin | 2015

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  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 47647 (06)
  4. University: Sharif University of Technology
  5. Department: Chemical and Petroleum Engineering
  6. Advisor(s): Jamshidi, Saeed
  7. Abstract:
  8. Aphron drilling fluids or CGA fluids are the wellknown updated drilling fluids in recent years.this kind of drilling fluids can control the mud loss into the formation and thus reduce formation damage and drilling costs. its structure consists of two phase fluid (gas and liquid) that the aphrons are the micro bubbles with 10 to 100 micrometer diameter that have strong stability in liquid phase compared to foamy drilling fluids. Generally aphron drilling fluids are made of base drilling fluid and surfactants, for more stability, mixed surfactant-polymer additive is so beneficial. in the last two decades, the Lattice-Boltazmann method is introduced for computational fluid dynamic area and fluid flow simulations.in this method, the Boltzmann equation is solved instead of Navier-Stocks equation.in this work we are going to use this method for simulating the aphron drilling fluid flow and its penetration into the formation at micro units, and at last the effect of this fluid in altering the formation permeability.all in all, the main framework is programming and simulation to introduce a new and improved method for aphron-based drilling fluids flow in porous media
  9. Keywords:
  10. Lattice Boltzmann Method ; Fluid Flow ; Aphron Based Fluids ; Permeability Reduction ; Simulation ; Drilling Fluid ; Aphron Drilling Fluid Penetration

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