The phenomenon of formation damage refers to any harmful process that, by affecting the reservoir formation especially the reservoir rock permeability, reduces the production capability of an oil or gas well or the injection capability of a well compared to its natural state. Therefore, formation damage is an undesirable phenomenon that, if it occurs, can cause many operational problems and economic losses. Reduction in production rate or flow rate of oil and gas from the well, reduction in the rate of water and gas injection into the formation, increase in pressure drop as a result of production and shortening of the life of the reservoir, and finally reduction of hydrocarbon reserves, which can be produced with economic efficiency, are all effects of formation damage. But it should be seen how severe these effects are and whether their effect on the performance of the reservoir and well is significant? In fact, the severity of damage to the formation depends on factors such as the type of damage and the method of completing the well, which we will discuss further in this paper.