A type of stimulation treatment, acidizing is performed below the reservoir fracture pressure in an effort to restore the natural permeability of the reservoir rock. Well acidizing is achieved by ...

Sandstone acidizing in horizontal wells is difficult because of placement limitations. Horizontal zones are typically longer than zones in vertical wells. Horizontal intervals can be many thousands of ...

As this is a routine procedure in certain areas, it will not be discussed in further detail here. The primary purpose of matrix acidizing in sandstones is to remove formation damage caused by clay and ...