The objectives of this study were: (1) to make a third party review of the Weeks Island CO/sub 2//Gravity Drainage Project, a cost-shared project by Shell Oil Company and the US Department of Energy (DOE,6602 ); and (2) to identify critical design parameters and determine the feasibility of using gravity stable gas displacement processes in other similar reservoirs. A gravity stable, CO/sub 2/ pilot was implemented in the ''S''Sand Reservoir B Weeks Island Field, Iberia Parish, Louisiana. Purpose of the pilot was to demonstrate that this displacement process can significantly reduce oil saturation below waterflood residual in high permeability steeply dipping reservoirs. The Weeks Island ''S''Sand was an excellent site for the pilot because it is similar to many Gulf Coast reservoirs and over 70 percent of the original oil-in-place (OOIP) was recovered by downdip water injection. Results are discussed. 12 refs., 41 figs., 7 tabs.