02010nab a2200193 4500 20260520004415.0 260224s2013 xxu ing Inglés Optimization of Foam Enhanced Oil Recovery Balancing Sweep and Injectivity feb. 2013 09/04/2013 ; 09/04/2013 8 p. ; 51-59 Transcripción del resumen del autor: Foam is a means of improving sweep efficiency that reduces the gas mobility by capturing gas in foam bubbles and hindering its movement. Foam enhanced-oil-recovery (EOR) techniques are relatively expensive; hence, it is important to optimize their performance. We present a case study on the conflict between mobility control and injectivity in optimizing oil recovery in a foam EOR process in a simple 3D reservoir with constrained injection and production pressures. Specifically, we examine a surfactant-alternating-gas (SAG) process in which the surfactant-slug size is optimized. The maximum oil recovery is obtained with a surfactant slug just sufficient to advance the foam front just short of the production well. In other words, the reservoir is partially unswept by foam at the optimum surfactant-slug size. If a larger surfactant slug is used and the foam front breaks through to the production well, productivity index (PI) is seriously reduced and oil recovery is less than optimal: The benefit of sweeping the far corners of the pattern does not compensate for the harm to PI. A similar effect occurs near the injection well: Small surfactant slugs harm injectivity with little or no benefit to sweep. Larger slugs give better sweep with only a modest decrease in injectivity until the foam front approaches the production well. In some cases, SAG is inferior to gasflood (Namdar Zanganeh 2011). 1 SPE Reservoir Evaluation and Engineering 16 ARTICULO Zanganeh, M. Namdar 52967 187585 187585 0 0 0 0 255404 BAAB BAAB 2026-03-06 200059716 0 200059716 2026-03-06 00:17:31 2026-03-06 ARTICULO