Deepwater production requires new approaches to field development. Floating production structures provide a method to produce oil and transport it to market. However, handling the associated gas is a new challenge. Storing produced associated gas in an aquifer for recovery at some future time was studied by use of a hypothetical sandstone aquifer in an anticlinal. trap. The results indicate that it is technically feasible to recover gas injected into an aquifer, provided the aquifer exhibits the appropriate structure, size, and permeability.