Impact assessment of strain-dependent permeability on reservoir productivity in CSS

Abstract Geomechanical analysis is essential to assess the productivity forecast of cyclic steam simulation (CSS) operations in heavy oil reservoirs. The high-temperature and high-pressure fluid injection, as well depletion unconsolidated poorly cemented porous media during CSS, may generate a relevant stress–strain response at levels that can lead irreversible changes reservoir permeability. Therefore, it fundamental consider permeability dependence on rock strain properly analyze impact geomechanics, pressure, temperature performance. This paper implements proposed directional strain-dependent model compare with conventional volumetric through numerical simulation, considering effects wellbore creation initial state. An explicit coupling between CMG-STARS geomechanics in-house simulator GSIM carried out perform simulations using model. results production rates profiles show competitiveness dilation compaction periods modify structure media. There significant influence stress state, strain, injected energy parameter. approximations this study might be used for feasibility assessment optimization CSS when integrating flow geomechanical behavior forecast.