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Heavy oil reservoirs cover up 2/3 of the world’s hydrocarbon reservoirs. When heavy oil is produced through horizontal wells with water drive, a water breakthrough is expected. Conventional inflow control devices (ICDs) can only delay a water breakthrough. The disadvantage of ICDs is the inability to control the water inflow, after the water breakthrough. Autonomous inflow control valve (AICV) is designed to choke or stop the inflow as soon as the water breakthrough occurs. To evaluate the performance of AICVs OLGA-Rocx simulations were conducted. Simulations show that the AICVs have a superior potential in limiting the water inflow to the base pipe (86% reduction in water accumulation compared to normal ICDs). AICVs are more effective in heterogeneous and fractured reservoirs as it can restrict the early water breakthrough. In homogeneous reservoirs, AICVs’ function reduces oil production rate compared to the ICD system, however, the lifetime of the well is increased.

Near Well Simulation and Modelling of Oil Production from Heavy Oil Reservoirs