The aim of acid injection into a well is creating better links between formation and well by dissolving the parts of carbonate formation around the wellbore. Hence, productivity of the well will be improved. Consequently with a constant drop down pressure, production is increased or in other word, with fixed production rates, drop down pressure or energy loss is reduced.
Hydrocarbons pass into the well through channels around the wellbore. Blocking of these channels are possible due to presence of materials such as sediment materials in drilling mud Acid can dissolving these materials, open the pores, and create channels for hydrocarbon to pass. In addition, narrow channels become wider and passing of formation fluid will be easier.