Abstract:

A Mannich product has been synthesized by selecting reaction conditions, and HZF-2 compound acid corrosion inhibitor has been prepared on the basis of the Mannich product. Inhibition efficiency of HZF- 2 under elevated temperature, high pressure and existence of hydrogen sulfide has been evaluated. In addition, damage of the corrosion inhibitor on formation has also been investigated. Results have showed that HZF-2 has good protection for N80 steel contacting with strong acid at normal pressure, high temperature and pressure. It can resist harmful hydrogen sulfide and has little damage to the tested formation core .As a result, HZF-2 can meet the needs of acid treatment.

Key words: acid corrosion inhibitor, synthesize, inhibition efficiency, corrosion rate