Agradecimentos: The authors are grateful for the support of the Center of Petroleum Studies (CEPETRO-UNICAMP/Brazil), the Department of Energy (DE-FEM-UNICAMP/Brazil), Brazilian National Agency of Petroleum, Natural Gas and Biofuels (ANP) (“Compromisso de Investimentos com Pesquisa e...

Agradecimentos: The authors are grateful for the support of the Center of Petroleum Studies (CEPETRO-UNICAMP/Brazil), the Department of Energy (DE-FEM-UNICAMP/Brazil), Brazilian National Agency of Petroleum, Natural Gas and Biofuels (ANP) (“Compromisso de Investimentos com Pesquisa e Desenvolvimento”), PETROBRAS S/A, Foundation CMG and Research Group in Reservoir Simulation and Management (UNISIM-UNICAMP/Brazil), and CMG for software licenses

There are many ways to integrate reservoir and production system simulations to forecast production, in a single model (implicit) or in coupled models (explicit). Explicit coupling, a simple and flexible coupling method, has the advantage of using commonly available commercial software to integrate...

There are many ways to integrate reservoir and production system simulations to forecast production, in a single model (implicit) or in coupled models (explicit). Explicit coupling, a simple and flexible coupling method, has the advantage of using commonly available commercial software to integrate reservoir and production systems simulations. However, explicit coupling may produce large deviations as the inflow performance relationship (IPR) curve, which combines well pressure and production and injection rates, can only be evaluated or amended at the beginning of a time-step. As the IPR curve changes during a time-step, it may be necessary to correct unstable results for well pressure and rates. Using a previously proposed IPR correction method, numerical stability was improved, reducing deviations during advancing the time step. A formula was created to support the correction of IPR curve. The methodology was tested using cases with known responses for pressures and flow rates, for a predetermined production strategy from the benchmark case UNISIM-I-D. Deviations were reduced to near zero when compared with uncoupled and decoupled methodologies to integrate reservoir with production system simulations

Fechado