Miscible and near-miscible gas flooding has proven to be one of the few cost effective enhance oil recovery techniques in the past twenty years. The sweep efficiency of such processes is often not high because of the adverse viscosity ratio and density difference between the solvent gas and the oil as well as the reservoir heterogeneity. Water-alternating-gas processes are often used to improve sweep efficiency. Foams and direct thickeners have been developed, but not used in field routinely. Effect of new well architectures on sweep efficiency is poorly understood. As the scope of miscible flooding is being expanded to medium viscosity oils in shallow sands in Alaska and shallower reservoirs in the lower 48, there are questions about sweep efficiency in near-miscible regions. The goal of this research is to evaluate sweep efficiency of various miscible processes in a laboratory model and develop numerical tools to estimate them in fields. In the last year, a high pressure quarter 5-spot model was assembled. We conducted slim tube tests, corefloods, and quarter 5-spot floods with an Alaskan shallow sands oil. We developed 1D compositional models of core floods and streamline-based compositional model of quart 5-spot WAG floods. Plans for the next six months include experimental quarter five-spot gas/WAG floods, and 3D modeling of these experiments.