Iran carries out acid fracturing for first time

Oil&Gas Materials 3 July 2016 18:09 (UTC +04:00)

Baku, Azerbaijan, July 3

By Fatih Karimov – Trend:

Iran for the first time successfully implemented acid fracturing operation in one of its oil fields, oil ministry’s SHANA news agency reported July 3.

The operation was carried out in well No. 11 of Azar oil field, which is shared with Iraq.

The acid fracturing operation was carried out by Kish Petroleum Engineering (KPE) company over the well in order to increase its oil recovery rate.

The Azar oilfield spans an overall area of 482 square kilometres in southeast of Mehran town in the western Iranian province of Ilam. The field is estimated to hold 2.5 billion barrels of oil in place.

Acid fracturing is a production stimulation technique that has been widely used by the oil industry. In such a treatment, acid or a fluid used in a pad ahead of the acid, is injected down the well casing or tubing at rates greater than the rate at which the fluid can flow into the reservoir matrix.

In general, acid fracturing is best applied in shallow, low-temperature carbonate reservoirs. The most commonly used fluid in acid fracturing is 15 percent hydrochloric acid (HCl).