In an attempt to increase the sweep efficiency of the CO/sub 2/ process, this work is focusing on two independent approaches. The first is to evaluate the effect of injecting CO/sub 2/ down a deviated (horizontal) borehole in a line-drive source mode as compared to the more conventional vertical well or point source mode. The amount of increased oil production from this approach may or may not warrant the additional expense for drilling this type of well. This work is being done in the laboratory with a 2-dimensional physical simulator. The construction of this device and the completed experiments are discussed in this report. The second path that is being pursued is an attempt to determine the potential success of dissolving a monomer such as ethylene in supercritical CO/sub 2/ and then polymerizing the monomer/CO/sub 2/ mixture. Other investigators (Heller et al.) have found in previous work that the solubility of polymers in CO/sub 2/ is low and thus does not greatly increase the viscosity of the CO/sub 2/. This work hopes to determine whether the process of dissolving monomer and then polymerizing will be more successful. This work is also being done in a laboratory setting. The current status of the experimental apparatus and a discussion of the literature survey are presented in this report. 12 figs., 3 tabs.