Evaluation of Non-oxidizing Biocides to Control Sulfate-Reducing Bacteria on a Produced Water Injection Plant

摘要

This study shows the procedure used for evaluating the effectiveness of a variety of non-oxidizing biocides for controlling microbiologically influenced corrosion (MIC) by sulfate reducing bacteria (SRB) in a water injection plant of a Venezuelan oil company. A laboratory screening of 15 biocides was completed against sessile SRB on carbon steel surfaces at the maximum concentration established by the manufacturer and two hours as contact time. This evaluation permitted a reduction of the options to four biocides. Results showed that a good method for growing biofilms and evaluating the efficiency of biocides in laboratory was the use of produced water with a 10% inoculum of a fully grown SRB culture originating from the field system.