Iterative and numerical solutions for pressure-transient analysis of stress-sensitive reservoirs and aquifers

Deep-seated petroleum and geothermal reservoirs as well as aquifers may exhibit stress-sensitive permeability. For such geosystems, pressure-transient analysis based on models, assuming constant permeability throughout the system, can result in considerable errors in parameter estimation. This work describes three models for stress-dependent permeability. Relevant fluid-flow equations are solved using iterative and numerical methods for all of the three permeability models. FORTRAN computer programs developed for these permeability models using iterative and numerical solutions are presented to aid in the analysis of transient tests for stress-sensitive geological systems. The main features of the computer programs also are described. Copyright (C) 1996 Elsevier Science Ltd