Granular biocide for microbial control

2K7 Water Soluble Paks / Granular

2K7® Water Soluble Pak / 2K7 Granular is a solid biocide that contains 98.7% active ingredient. It is a responsive, long term control biocide; the main mode of action is inhibition of thiol-containing enzymes causing cell leakage and eventual collapse. 2K7 has a high level of activity against all groups of bacteria including sulfate reducing bacteria (SRB). The efficacy of 2K7 is easily measured using ATP testing methods. Resistance or high level tolerance has not been observed with 2K7 even in facilities that have used the product for over 15 years. The two delivery mechanisms, soluble packaging or free granules, allow for adaptability of dry add solids to systems with high TDS that can reduce pack dissolution rates.

Properties

Appearance: White crystalline
pH: 4-7 1% sol. @ 20°C / 68°F
Solubility in Water: 28% (m/v) @ 23°C / 73.4°F in fresh water
Odor: Odorless
Decomposition Temp: 140°C / 284°F
Packagaing: 2K7 WSP are produced in 1kg soluble packs stored in a secondary re-sealable bag then transported in 25kg fiberboard container. This makes 2K7 WSP a very safe product to transport, handle and apply. 2K7 Granular is produced in 5 kg containers to be utilized when handling large fluid volumes or high brine fluids. It is sold 4 to a case for net product of 20 kg.

2K7 Water Soluble Paks / Granular Features and Benefits

  • Responsive and persistent control
  • Broad spectrum, anti-bacterial activity
  • Non-ionic, compatible with most other chemistries, synergistic inhibition with select biocides
  • Stable in solid form and in solutions with pH 4 up to 3+ years @ temperatures below 40°C / 104°F
  • Effective in heavy brines and high iron
  • Effective with high suspended solids

2K7 Water Soluble Paks / Granular Recommended Uses

  • Oil/gas – wells, tanks, pipelines
  • Coiled Tubing, work-over fracturing and packer fluids
  • Water treatment, storage and recycle/reuse
  • Recirculating cooling towers
  • Metal working and pulp mill operators
  • See label for all registered applications for Canada and USA

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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