APB are highly aggressive if there is a positive detection of these bacteria in 4 days or less. Moderate aggressivity occurs when the time lag is between 5 and 8 days and a loss level of aggressivity occurs when the time lag is greater than 8 days. There are a range of treatment strategies that are sometimes used to control APBs in corrosive waters. If these treatments are effective, this will be observed in increases in the time lags to a positive detection occurring in the water sample taken after treatment. A minimal time lapse before post-treatment testing for the effectiveness of a treatment should be at least 14 days after the treatment with 42 days a suitable lapse period.
Corrosion costs money, time and failures.
The effectiveness of these treatments can be monitored using the BARTs judiciously after treatments. Preventative maintenance can provide a tool to control these invasions and minimize the consequences. Microbial Fouling of Oil and Gas Wells Causing Plugging. Plugging means the a well is losing its production because there is not enough conductivity into the well as a result of biofilms growth with subsequent encrustation and slime formations. It is a common experience for oil and gas wells to begin to lose their production capacity long before the reserves around the well have become exhausted.