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A new mathematical model for force gravity drainage in fractured porous media

Ganjeh Ghazvini, M ; Sharif University of Technology

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  1. Type of Document: Article
  2. DOI: 10.1007/s11242-009-9476-0
  3. Abstract:
  4. In force gas/oil gravity drainage process in fractured porous media, gas is flowing in both matrix and fractures leading to produce a finite gas pressure gradient. Consequently, viscous force plays an important role for displacing matrix oil toward fractures in addition to gravity force that is required to be modeled appropriately. A new analytical model for estimation of steady state oil saturation distribution with assumption of fixed gas pressure gradient throughout the matrix is presented. Moreover, based on some results of this analytical model a different numerical formulation is developed to predict the performance of oil production process. Comparison of the results obtained from this numerical model with the results of a conventional simulator demonstrates that the newly developed model can be applied with satisfactory accuracy. Numerical simulations show that the viscous displacement in fractured porous media can reduce the capillary threshold height, and thus it suggests the force gravity drainage as a favorable production mechanism when the matrix length is close to the threshold height
  5. Keywords:
  6. Capillary threshold height ; Force gravity drainage ; Fractured porous media ; Steady state oil saturation distribution ; Gas pressure gradient ; Gravity drainage ; Oil saturation ; Steady state ; Computer simulation ; Fracture ; Gases ; Models ; Porous materials ; Mathematical models ; Analytical method ; Fractured medium ; Gas flow ; Numerical model ; Porous medium ; Pressure gradient
  7. Source: Transport in Porous Media ; Volume 83, Issue 3 , 2010 , Pages 711-724 ; 01693913 (ISSN)
  8. URL: http://link.springer.com/article/10.1007%2Fs11242-009-9476-0