Application of a New Measurement Techniques for Organic Acid Additives in Stimulation Fluids

摘要

An analytical method was implemented to simultaneously measure the concentrations of acetic, citric and formic acids in stimulation fluids. This method was not previously available for acid stimulation treatments. Capillary electrophoresis is used for rapid and accurate measurement of these organic acids in concentrated hydrochloric acid and in highly contaminated spent acidizing fluids. Commonly used titration methods are not effective at low organic acid concentrations or when more than one organic acids in concentrated hydrochloric acid and in highly contaminated spent acidizing fluids. Commonly used titration methods are not effective at low organic acid concentrations or when more than one organic acid is present. Acetic, citric and formic acids have been used extensively in Saudi Aramco fields over the last few years as stimulation fluids and as acid additives. Citric and acetic acids are frequently used in acid treatments as iron control agents.