Sharif Digital Repository

Acidizing is one of the most effective techniques to remove the formation damage and restore (or even increase) the permeability of the near wellbore region. Although this technique is widely used to resolve the skin problem, it could initiate new damages itself that hinder the fluid flow and decrease the well production, consequently. Acid-oil emulsion and sludge formation are known as two major induced formation damage and the main reasons for the oil well acid treatment failures.When the HCl is reacted with asphaltenic crude oil during matrix acidizing, it results in unexpected damage at the near wellbore region and hinder the fluid flow through certain mechanisms include:
1- Pore... 

Acidizing as the most frequent stimulation technique in the field, has been extensively used to increase the production rate. Even though acidizing treatments is well established, there is still an inherent risk for self-induced formation damage through incompatibilities of the fluids involved in this process.
A main potential problem during acidizing is the incompatibility of the acid and the reservoir’s crude oil. Acid interaction with crude oil can produce two major damage mechanisms that could offset partially, if not totally the benefit of the acid stimulation. These mechanisms are the rigid film emulsion formation and the acid-sludge precipitation, result in well productivity... 

The Oil wells are usually damaged because of the drilling process and production scenarios or fluid injection during EOR processes. These damages would critically affect the rate of production and injectivity of the well in the form of plugging damage. Different methods are used to fix these damages and increase the production flow from the oil wells. One of the most widely used well-stimulation methods to remediate this challenge is well acidizing. Although this method has very high efficiency in improving the ability of wells, if it is not designed and implemented correctly and optimally, it can cause induced damage and even lead to the well shutting. This challenge is especially reported...