The field is considered as drillers' nightmare given the sequence of its low-pressure and high-pressure layers and the large number of tubes for drilling and lining of wells.
Hydraulic fracturing is another challenge in the field which has been addressed by acid fracturing, which is a popular method for improved oil recovery (IOR).
The acid fracturing operation was proposed in 2005 by an leading international company but was not implemented until an expert team from Oil Industries Engineering and Construction Company (OIEC) carried out the project after meticulous studies over the well.
Designing an acid-fracturing treatment is similar to designing a fracturing treatment with a propping agent.
In general, acid fracturing is best applied in shallow, low-temperature carbonate reservoirs. The most commonly used fluid in acid fracturing is 15% hydrochloric acid (HCl).
With 2.5 billion in place of reserves, Azar oil field lie in common border with Iraq. The shared oil field is part of Anaran Block in southwest of Ilam Province.
Sarvak Azar Engineering and Development Company is involved in development of the oil field as operator.
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