Fluvial-deltaic sandstone reservoirs represent significant opportunities for re-development in mature fields throughout the world. They presently account for more than 34 billion barrels of unrecovered oil resources in the United States and, as a class, represent the highest percentage of remaining mobile oil resources in clastic reservoirs throughout the state of Texas (Figure 1). The stratigraphic complexity inherent in these deposits is responsible for recovery efficiencies in large part because of the isolation of significant volumes of mobile oil in undeveloped reservoir compartments (Figure 2). These unproduced zones can be identified by integrated geological and engineering reservoir characterization and targeted for incremental recovery by recompletions and infill drilling.