Salt precipitation and scaling problems have been accompanying the oil production since its early days of discovery and these issues have constantly been reported in oilfields around the globe. Traditionally, scale deposition was looked upon as a problem occurring in valves, heaters, well tubing, surface and subsurface equipment. In recent years, as water flooding techniques have been increasingly applied in petroleum industries, the incompatibility between injected water and indigenous formation water is being recognized as a menace to successful oil recovery. The purpose of the current book is to provide a general overview on thermodynamics, kinetics and hydrodynamics of the salt deposition in porous media, in response to the concerns raised in petroleum industry. Moreover, new mathematical models are also presented for estimation of the permeability loss as a result of mixed salt precipitation in porous media.