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Experimental investigation of near miscibility effect on relative permeability curves

Parvazdavani, M ; Sharif University of Technology | 2012

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  1. Type of Document: Article
  2. Publisher: European Association of Geoscientists and Engineers, EAGE , 2012
  3. Abstract:
  4. The requirement of reliable relative permeability data is more intensified when the miscibility condition approaches. In this work the relative permeability of CO2 and oil has been measured at different miscibility conditions using conventional methods. Fractured dolomite and sandstone core plugs samples were used in the experiments. Due to some errorful assumptions of conventional methods such as immiscible, incompressible displacement, inverse modeling was used for predicting the reliable relative permeability of oil and gas phases at near miscible condition from measured oil production and pressure drop data. The initial guesses of relative permeabilities were provided from conventional semi analytical method. The results showed that by approaching the miscible conditions, the conventional methods underestimate the values of oil-phase relative permeability, while the values of gas phase do not change considerably. Moreover, the effects of near miscibility on the gas phase relative permeability curve were stronger. By having a fair relation between the criteria of approaching to near miscible and the errorness of conventional methods, we modified the conventional method. The results of this work can be helpful in understanding of the near miscible relative permeability behavior at low IFT conditions
  5. Keywords:
  6. Gases ; Inverse problems ; Oil shale ; Solubility ; Conventional methods ; Experimental investigations ; Inverse modeling ; Oil production ; Relative permeability ; Relative permeability curves ; Sandstone cores ; Semi-analytical methods ; Gas permeability
  7. Source: 74th European Association of Geoscientists and Engineers Conference and Exhibition 2012 Incorporating SPE EUROPEC 2012: Responsibly Securing Natural Resources, 4 June 2012 through 7 June 2012 ; June , 2012 , Pages 5469-5474 ; 9781629937908 (ISBN)
  8. URL: http://earthdoc.eage.org/publication/publicationdetails/?publication=59805