Numerical simulation of well tests in stress sensitive gas condensate reservoirs

The effects of capillary number and effective inertial resistance on gas condensate well productivity have been studied in the laboratory and correlations incorporated in commercial simulators. In this work, an evaluation of the impact of these effects and of geomechanics on well Cupiagua A1 productivity was carried out. The initial tests performed on this well were history matched by means of compositional simulation including steady-state relative permeability curves measured at a low capillary number and a Peng-Robinson EOS tuned to laboratory and field data provided by the field operator. Well testing techniques and well models in field simulators implement variations of the two-phase pseudopressure to account for multiphase flow conditions due to liquid dropout in gas condensate wells. The applicability of the multiphase pseudopressure to the analysis of well tests dominated by capillary number and inertial effects was also studied.; Finally, a partially coupled model of flow and deformation for the same well tests was constructed that allows identifying any variation of the well flow capacity caused by geomechanical effects. This effect was found to be of secondary importance for the studied case.