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Experimental Study and Modeling of Scale up in Multi-blocks Fractured Porous Media

Mohammadi, Mohammad | 2018

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  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 50399 (06)
  4. University: Sharif University of Technology
  5. Department: Chemical and Petroleum Engineering
  6. Advisor(s): Ghazanfari, Mohammad Hossein; Rostami, Behzad
  7. Abstract:
  8. Fractured reservoirs constitute a major portion of world’s petroleum reservoirs. Gravity drainage is the controlling production mechanism in these reservoirs. Thus, investigation of performance and oil production in fractured models has been the subject of many researches. Despite the considerable number of experimental and modeling studies in this area, the method of scale-up in single or multi block models is not broadly investigated. This work is divided into two experimental and modeling sections. For the experimental study, free fall gravity drainage experiments in synthetic single or multi block porous media were performed in order to investigate effects of different parameters including block height, fracture inclination, matrix permeability,fracture aperture and fluid type on production behavior. In modeling section, gravity or capillary dominant behaviors of models in early, middle or late times was considered and compared with experimental data. Also, effective dimensionless groups of this process were recognized by using inspectional analysis for mass and momentum balance equations for matrix and horizontal fractures. Results indicated that increasing the number of matrix blocks causes a reduction in ultimate fluid recovery and increases production rate at middle times and also increases maximum capillary number. By increasing dimensionless block height for a constant Bond number, a linear increase in recovery factor was observed. Also, recovery factor is an inverse linear function of permeability dimensionless group. However, effects of Bond number and dimensionless height are more significant. Results of inspectional analysis after formation of matrix coefficients showed that eleven dimensionless groups are obtained. Two of these groups are reported for the first time.Results of this study helps to better understand the method of scale up of experimental data into
    larger scales
  9. Keywords:
  10. Fractured Porous Media ; Modeling ; Experimental Studies ; Gravity Drainage Mechanism ; Scale Up method

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