| dc.description.abstract | The oil industry has been an important source of conventional energy. The enhanced oil recovery (EOR) method is one of the most efficient methods in the oil recovery process. Using an advanced multi-lateral well model in the oil recovery process created an exceptional benchmark. In this study, simulation was conducted for both the WAG injection and CO2-WAG injection using FCDs in an advanced horizontal well in the OLGA and ECLIPSE simulator. CO2-WAG injection has a better oil production rate than WAG injection because of the miscibility characteristics of CO2 with oil. CO2-WAG injection can be simulated only for advanced horizontal wells in the ECLIPSE simulator by the solvent model. The solvent model can not be used for the multisegment well model.
Preventing early water and gas breakthroughs is challenging in the oil recovery process. To overcome this issue inflow control technologies like ICD, AICD, and AICV are introduced. This study result showed that AICD and AICV have a better choking effect on low viscous fluids like water and gas delaying their early breakthrough in the pipe. Before the water breakthrough, the AICD and AICV valve was fully opened for oil production. A new mathematical model was implemented in the algebraic controller to control the valve opening of AICD. AICD valve opening gets closed better with the increasing rate of water cut.
Optimizing the water/CO2 injection ratio for the CO2-WAG injection EOR is also an important factor for better oil recovery. In this study, CO2-WAG injection EOR was simulated for several water/CO2 injection ratios and the result showed the ratio of 1.5 has the optimum oil production considering the water production as well. In conclusion, the CO2-WAG injection and the WAG injection EOR are successfully simulated for both the advanced horizontal well and the multi-lateral well using the inflow control devices in the OLGA and ECLIPSE simulator. | |
