Synthesis and Evaluation of Acid Self-Diverting Agent

Abstract:

An acid self-diverting agent compound by betaine type surfactant and quaternary ammonium salt type surfactant was synthesized and evaluated. Found that when the pH value was higher than 1, acid viscosity rose rapidly, and the pH value up to 3, acid viscosity reached its maximum value (300mPa s), and can effectively made the acid diverse.When the pH value was 6, the system completely gelouted, easy to flowback; When added the self-diverting additives, acid system had better temperature resistance; With the elevated of concentration of the self-diverting agent, the apparent viscosity of acid increased, when the concentration of the self-diverting agent was more than 5%, the acid apparent viscosity increased little, gradually stabilized, but all above 300mPas, meet the industry standard requirements.

• Periodical: Applied Mechanics and Materials (Volumes 333-335)
• Pages: 1824-1827
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.333-335.1824
• Online since: July 2013
• Authors: Ji Gang Wang*, Wen Xiu Zhao, Guang Zhi Han, Qing Wang Liu, Zhen Zhong Fan
• Keywords: Acid Self-Diverting Agent, Apparent Viscosity, pH

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