This report designed an apparatus to allow the use silicon-wafer micromodels over a wide range of pressures, as required for solution gas drive experiments. Specifically, a pressure vessel was fabricated to apply the necessary confining pressure to the micromodel. A system of valves and tubing was constructed to provide pressure control for the system. A syringe pump allowed for constant volume expansion rate during pressure decline experiments. Observations of the porous medium were made through a sapphire window using a high-power (200X) microscope.