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Scale-up of Saturation Function in Composite Cores

Mohammadi Alamouti, Amirhossein | 2014

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  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 46052 (06)
  4. University: Sharif University of Technology
  5. Department: Chemical and Petroleum Engineering
  6. Advisor(s): Ghazanfari, Mohammad Hossein; Masihi, Mohsen
  7. Abstract:
  8. Water injection is one of the main methods of enhanced oil recovery that its success depends on exact study of main effective parameters. Saturation functions including relative permeability function and capillary pressure function are one of the effective parameters on the success of water injection projects. In many reservoirs there is wide heterogeneity and various layering that have different absolute permeability. These features result in uncertainty to measurement of curves of saturation function. Experimental studies on this field are carried out on the composite cores that show heterogeneity and layering media of reservoir. By Scaling up the saturation functions from single cores to composite core system a set of correlations are developed that can improve prediction of water injection simulation results. It also decreases run time of simulation. Fluid flow behavior in composite core system differs from single cores. Arrangement of cores in composite system and characteristics of each core have a significance influence on results of this system. Saturation functions in composite cores are affected by these parameters. In this project the effect of individual cores property and their different arrangements on the saturation functions of composite cores are investigated. With considering capillary pressure in calculation of relative permeability in reverse modeling method the measurement error is minimized.
    Results show that in the ascending arrangement of core set, the maximum recovery, and in Huppler arrangement the minimum recovery is obtained. In homogenization process, the obtained relative permeability calculated from the other methods are considered as the basis, then the absolute permeability for two phase flow is calculated from reverse modeling that differs from harmonic average of absolute permeability. Other properties such as porosity and saturation are arithmetically averaged. At the end of the project, an empirical correlation is developed that is based on individual cores properties
  9. Keywords:
  10. Experimental Method ; Scale Up method ; Saturation Functions ; Composite Cores ; Arrangement

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