Study on release of smart controlled solid acid SRA-1

This paper introduces a new solid acid (SRA-1) which can be released through intelligent control. Over 85% content of the SRA-1 is solid hydrochloric acid (GS-1), which is measured by acid-base titration. The impacts of acid concentration, salinity, viscosity, temperature and time on SRA-1 release performance are studied. The results indicate that NaCl has no obvious influence on the SRA-1 release performance, and the SRA-1 can not release in half an hour with the conditions of over 12 wt% HCl, 0.5‰ thickener and 135 ℃. With the conditions of 10 wt% HCl, 0.5‰ thickener, and running for an hour at 135 ℃, the GS-1 retention rate of SRA-1 will maintain over 50%. So the SRA-1 is a potential material which can be used for reform in deep reservoir.