Perpustakaan Digital ITB

Enhanced Oil Recovery (EOR) methods, such as Low Salinity Water Injection (LSWI), have proven to increase oil production from mature reservoirs. Hybrid EOR, which combines LSWI and Water Alternating Gas (WAG), has been researched and shown to be effective in optimizing oil recovery. This study employs a compositional simulator, CMG GEMTM, and a heterogeneous Cation Exchange Capacity (CEC) distribution model to evaluate various LSWA-CO2 injection schemes at the B structure of the S field. The schemes include constant WAG, tapered WAG, and hybrid WAG. Results indicate that the constant WAG 1:4 scheme is the most optimal, achieving an oil recovery of 62.66%. However, this scheme also exhibits a sudden and significant decline in oil production, which could pose operational challenges. The constant WAG 1:1 scheme shows a slightly lower oil recovery of 62.55%, but it provides a more stable daily oil production rate, making it a feasible option for an optimal injection scheme design.