Reservoir Systems

Reservoir heterogeneity was uncovered to perform an important role in the variation of components as well as the transfer of heat within the reservoir. It was also observed that because convection and diffusion in non-producing reservoirs are relatively slow processes and the diffusion terms are small in magnitude the effect of variable diffusion coefficients was termed negligible. Other observations include a consistency in the results obtained irrespective of the grid size used for example the three-dimensional grids produced the same average pressure temperature composition and velocity profiles as the 2-dimensional grids for certain reservoir configurations.This study rummage-saled the general mass and energy balance equations to simulate fluid movement within a non-producing reservoir with thermal gradients. The configuration of fluid components and heat within the reservoir is characterized using various metrics such as the Nusselt and Rayleigh numbers as well as separation and density factors. These metrics are able to show in a concise manner the effect of changes in the reservoir and fluid properties on compositional variations.