Challenge: Coparex Champagne’s oil eld in France was experiencing continually problems with aerobic bacteria and sulfate-reducing bacteria from a production well’s tertiary water that is used to top o its process water reinjection. Fiberglass piping distributes the process water to four injection sites within a two-mile radius. A trial comparing Mexel to the prior treatment of a powerful biocide was conducted to nd a solution to the water contamination. Treatment: Mexel was continually injected into the production well’s discharge at 10 ppm for one week. Subsequently, the dosage was brought down to 5 ppm and continued. Results: Test results showed that Mexel had been completely eective in dispersing SRB colonies. Mexel was also more successful in dissipating the AERO colonies than the

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