Determination of Relative Permeability from Well Production Data with Consideration of Formation Heterogeneity and Fluid viscosity by Mean of Reservoir Simulator | ||
| Journal of Petroleum Research & Studies | ||
| Article 1, Volume 115, Issue 11, December 2016, Pages 45-59 | ||
| Authors | ||
| Deepak Devegowda; Faruk Civan; Ahmed Zarzor Al-Yaseri | ||
| Abstract | ||
| Accurate estimation of relative permeability is essential for reliable reservoir history matching and decision-making, and effective reservoir management. This information is also critical for the design, implementation, and monitoring of enhanced oil recovery processes. This study presents an effective method for acquiring the relative permeability data directly from the well production data in oil reservoirs where water acts as the fluid phase displacing oil. The methodology presented in this study provides convenient interpretation formulae which are applicable to unsteady-state, two-phase, immiscible, and incompressible fluids. The total mobility and the mobility ratio of the immiscible fluids are related to the characteristic parameters of the displacement process and the cumulative injected fluid pore volume following [1] et al. These parameters are then incorporated into a general correlation function which allows for analytically estimation of the relative permeability functions. The present approach produces unique estimation of the relative permeability functions and is more practical than the previous approaches which rely on computationally complicated history matching procedures, often suffer from the non uniqueness issue of the obtained relative permeability data. This study demonstrated that the fluid viscosity have significant effects on determined relative permeability curves using Toth et. [1]. Method for radial flow The Toth et al. method works satisfactorily even for heterogeneous reservoirs. The effect of heterogeneities on the relative permeability curves is negligible using Toth method. However, the effect becomes significant when there are channels. | ||
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