Well Placement Optimization through the Triple-Completion Gas and Downhole Water Sink-Assisted Gravity Drainage (TC-GDWS-AGD) EOR Process

Gas and downhole water sink-assisted gravity drainage (GDWS-AGD) is a new process of enhanced oil recovery (EOR) in reservoirs underlain by large bottom aquifers. The capital intensive as it requires the construction dual-completed wells for production additional multiple vertical gas-injection wells. costs could be substantially reduced eliminating using triple-completed multi-functional These are dubbed triple-completion-GDWS-AGD (TC-GDWS-AGD). In this work, we design optimize TC-GDWS-AGD fictitious reservoir (Punq-S3) that emulates real North Sea field. aims at maximum minimum number with completion section well, two horizontal well sections—the upper producing (from above oil/water contact) lower draining below contact. three completions isolated hydraulic packers drained from oil–water contact electric submersible pump. Well placement optimized particle swarm optimization (PSO) technique considering only 1 or 2 to maximize 12-year volume produced water. best was found hundreds possible locations throughout single-well two-well scenarios. results show 58% 0.28 cut scenario 63.5% 0.45 scenario. Interestingly, base-case without would give smallest 55.5% largest 70% cut. study indicates more productive reducing increasing less production.