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Granular biocide for microbial control

2K7 Granular / 2K7 Water Soluble Paks

2K7® Granular and 2K7 Water Soluble Paks are a solid end use 2-Bromo-2-nitropropane-1,3-diol (BNPD) product used to control microbial contamination. They are a non-ionic, balanced, broad-spectrum dry-add solid biocide.

Properties

2K7 Granular2K7 Water Soluble Pak
AppearanceWhite to Off-white free flowing solidWhite to off-white solid packaged in a clear water-soluble bag. The water-soluble bag is contained in a protective outer bag that is removed just prior to application.
Specific Gravity1.22-1.91
Density1.2-1.9 g/mL (10.01-15.86 lbs/Gal)
SolubilityWater soluble to 280 g/LWater soluble packaging dissolves in 44 Seconds at 20 °C (68 °F). Package contents are water soluble to 280 g/L
Ionic ChargeNon-ionic
pH5.0-7.0 (1% w/w Solution)

2K7 Granular / Water Soluble Paks Features and Benefits

  • Broad spectrum, non-selective antimicrobial chemistry
  • Non-ionic, highly compatible with other industrial chemicals
  • Balanced efficacy (good balance between speed and length of protection)
  • 2K7 Water Soluble Paks avoid chemical contact – just open outer bag and toss the pak in
  • Effective in high TDS and dissolution challenges – 2K7 Granular pours through oil skins

2K7 Granular / Water Soluble Paks Recommended Uses

  • Dry addition (including batch addition) for treating high water volumes including addition into Frac, Saddle, Buffer and Settling tanks.
  • Within Completions activities, 2K7 Water Soluble Paks can be used to:
    • Pre Treat Tanks
    • Topping Up Buffer/Working Tanks
    • Fluid Transfer Control (Trucking, Pipeline, Lay Flat Hosing)
    • Fluid Staging – Tanks and Pits (Long Term Control)
    • Asset Layup or Cleaning
  • 2K7 Granular and 2K7 Water Soluble Paks are a registered biocide. Please refer to product label for approved directions for use.

Packaging

  • 2K7 Granular is available in pails in North America.
  • 2K7 Water Soluble Paks are available as boxes of 25 x 1Kg (2.2 lbs) bags in North America.

OSP 2K7 biocide addresses premature coiled tubing failures in the Montney formation

Background

Premature coiled tubing (CT) unit failure has been observed in certain areas of the United States, such as the Eagle Ford and Haynesville formations, and the Permian basin in Texas. This issue was not thought to be as prevalent in Canada until a recent Society of Petroleum Engineers (SPE) publication detailed how a major Canadian CT service company experienced an alarming seven CT string failures within three months while performing bridge plug mill-out operations in the northeastern British Columbia portion of the Montney formation.1

The CT string point of failures were in the range of 18 – 48% fatigue – well below their predicted fatigue life. CT strings can fail for a variety of reasons including external mechanical damage, corrosion and excessive diametrical growth. Premature CT failure results not only in operational delays with the associated cost, but critical safety risks are posed to personnel on location.

Frequently Asked Questions

What are the long-term production benefits of treating with 2K7 biocide?

The usage of 2K7 biocide prevents bacterial contamination and growth, controlling issues that arise from their presence, including microbiologically influenced corrosion (MIC). 2K7 reduces the risk of failures, improves run time on pipe, prevents contamination of downhole equipment and controls formation damage.

How do microbes contribute to corrosion?

The reason MIC is defined as “influenced” is because the bacteria don’t directly corrode the metal, but they accelerate the process by affecting the chemical reactions that cause corrosion. Biofilms – layers of bacteria in a matrix of slime – grow on metal surfaces changing the physical and chemical micro-environment. For example, anaerobic sulfate reducing bacteria (SRB) convert sulfate into hydrogen sulfide – a strong acid. This effectively creates a mini battery, with the metal pipe providing the negative and positive poles (anode and cathode). The resulting localized chemical reactions dissolve the metal within a small area – increasing the chances of metal failure.

Other types of bacteria have been implicated in MIC, such as acid producing bacteria (APB) and metal reducing or oxidizing bacteria (MRB and MOB); however, more research is needed.

What is archaea and can it contribute to MIC?

Archaea are a domain of microbes/microorganisms, very similar, yet distinct from bacteria. A number of species have been identified that contribute to MIC within this domain. That being said, the behavior is similar and our control methods are employed in the same way.

Is 2K7 compatible with most chemistries?

Yes. 2K7 is non-ionic and therefore very compatible with most system components within the oil and gas industry.

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