The De Nora blog: Water Made Easy

Application Spotlight: Hydraulic Fracturing

Aug 20, 2020 2:00:00 PM / by De Nora

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With longer laterals being drilled and stages being added, well completion by hydraulic fracturing (frac) now requires an ever-increasing amount of water for every well that is drilled and completed. Ensuring that the water used in frac is free of bacteria is a critical part of the overall treatment and conditioning of water before it is sent downhole. This is especially true as more operators are using recycled flowback and produced water for completion activities.Microbial contamination in hydraulic fracturing water can result in a variety of operational and production issues, including souring of the well and the resulting hydrocarbon product, corrosion of oilfield equipment, and formation plugging by bacterial biofilms. Common oilfield bacteria that are responsible for these issues include sulfate-reducing bacteria (SRBs), iron-reducing bacteria (IRBs) and acid-producing bacteria (APBs).


As many operators have discovered, the best way to avert the issues caused by the introduction of oilfield bacteria in a well during completion is to ensure that the water used for hydraulic fracturing has been adequately disinfected. Frac water disinfection can be achieved through the addition of a variety of biocidal chemicals, utilizing both oxidizing and non-oxidizing options. Selecting the proper disinfection chemical is achieved by considering a variety of parameters, including compatibility with other frac chemicals, cost, and worker safety.

De Nora’s containerized ClorTec systems use electrolysis to generate sodium hypochlorite solutions with a mild pH and a chlorine content of 0.8%, making them the safest oxidizer option in the oilfield today. ClorTec systems have been used to disinfect water for thousands of frac stages. They are robustly designed to withstand oilfield environmental challenges ranging from East Texas back roads to winters in the Bakken. 

Since the only inputs for a ClorTec system are water, electricity, and salt, these systems also represent the lowest cost oxidizer in the market. Overall, De Nora ClorTec electrochlorination systems deliver the safest oilfield oxidizing chemistry at the lowest price per barrel available. Contact De Nora today to see how we can help with your frac water disinfection challenges.

Microbial contamination in hydraulic fracturing water can result in a variety of operational and production issues, including souring of the well and the resulting hydrocarbon product, corrosion of oilfield equipment, and formation plugging by bacterial biofilms. Common oilfield bacteria that are responsible for these issues include sulfate-reducing bacteria (SRBs), iron-reducing bacteria (IRBs) and acid-producing bacteria (APBs).

As many operators have discovered, the best way to avert the issues caused by the introduction of oilfield bacteria in a well during completion is to ensure that the water used for hydraulic fracturing has been adequately disinfected. Frac water disinfection can be achieved through the addition of a variety of biocidal chemicals, utilizing both oxidizing and non-oxidizing options. Selecting the proper disinfection chemical is achieved by considering a variety of parameters, including compatibility with other frac chemicals, cost, and worker safety.

De Nora’s containerized ClorTec systems use electrolysis to generate sodium hypochlorite solutions with a mild pH and a chlorine content of 0.8%, making them the safest oxidizer option in the oilfield today. ClorTec systems have been used to disinfect water for thousands of frac stages. They are robustly designed to withstand oilfield environmental challenges ranging from East Texas back roads to winters in the Bakken. 

Since the only inputs for a ClorTec system are water, electricity and salt, these systems also represent the lowest cost oxidizer in the market. Overall, De Nora ClorTec electrochlorination systems deliver the safest oilfield oxidizing chemistry at the lowest price per barrel available. Contact De Nora today to see how we can help with your frac water disinfection challenges.

What Does Your Water Need? 

Better determine the proper level of sodium hypochlorite based on water quality with our FREE online dosing calculator. Click below for more information.

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Tags: De Nora, ground water, Fracturing

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