Otimização da produção de poços de petróleo com injeção contínua de gás e alinhamento poço-separador: modelos lineares por partes e algoritmos

Abstract

The lift-gas allocation problem with well-separator routing constraints is a mixed-integer nonlinear program of considerable complexity. To this end, a mixed-integer linear formulation (compact) is obtained by piecewise-linearizing the nonlinear curves, using binary variables to express the linearization and routing decisions. A new formulation (integrated) combining the decisions on linearization and routing is developed by using a single type of binary variable. The structures of both formulations are explored to generate lifted cover cuts. Numerical tests show that the use of cutting planes in a cut-and-branch scheme accelerates the resolution time. The solution of the integrated formulation using cutting-plane generation is faster in spite of having more variables than the compact formulation