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Summary Dynamic heterogeneity is an essential factor in an EOR process that effects the amount of recovery, thus it is important to investigate conditions that impact this factor. Compositional gradient is among these conditions which induces dynamic heterogeneity due to different fluid viscosities, this theory was observed in this study during a waterflooding process. Calculations of dynamic heterogeneity was based on MRST simulation software. To closely observe the impact of compositional gradient we must first establish a uniform condition for other parameters such as porosity and permeability and well pattern to reduce their impact on the overall dynamic heterogeneity. After choosing the least heterogenous well pattern using simulation we will study the influence of compositional gradient by dividing the reservoir in two upper (low viscosity) and lower (high viscosity) parts, five viscosity ratios (lower/upper) are considered and simulated. Eventually, an increase in dynamic heterogeneity during water flooding is observed for all viscosity ratios in this model. |
