Multifunctional Emulsified Acid for Corrosion and Sludge Reduction in Carbonate Acidizing

Matrix acidizing improves productivity in carbonate reservoirs but conventional HCI often causes corrosion, sludge formation, and iron precipitation, particularly under HPHT conditions. This study introduces a multifunctional emulsified acid system designed to reduce these issues without using conventional corrosion inhibitors. Laboratory evaluations showed significantly lower corrosion rates compared to ۱۵% and ۲۸% HCI, with a maximum of ۰.۲۱۴ lb./ft² at ۲۵۰°F and ۵۰۰ psi. The system also effectively suppressed sludge and iron-induced precipitation in crude oils from several Iranian fields, demonstrating improved wellbore protection and enhanced stimulation efficiency.

کلیدواژه ها:

Corrosion rate reduction ، Emulsion acid ، Formation damage control ، Multifunctional additive