Reservoir Rock Behavior Pre and Post Pore Collapse during Production

It is very common that effective stresses increase as reservoir<br>fluids being produced from both shallow and deep reservoirs.<br>It may seem reasonable to assume that permeability and<br>porosity decrease as pore pressure declines, since effective<br>volumetrical stresses become intensified during reservoir<br>depletion. However, laboratory results show that this is not<br>always the case.