According to the Mehr news agencys Bazargani report, biocides or disinfectants are useful compounds that are used to control fungi and microbes and even algae in products. The oil and gas industry is one of the important areas where Biocide can help to produce better quality, protect transmission pipes from sediment and rust, and increase the useful life of equipment.
Definition of biocide
Biocide prevents the growth of harmful microbes and controls them through a chemical and biological reaction. Naturally, many destructions are caused by these microbes and fungi. From food to chemical and industrial products, not all are safe from harmful microorganisms. Adding a certain dose of these bactericides can help to destroy or control the growth rate of algae, fungi or microbes.
Types of biocides
The materials used as biocides are different and each one is used according to the conditions. Oxidizing and non-oxidizing are two categories of biocides, the mechanism of action of each of them is known from their names. This group of substances penetrates into the invading cell and stops the metabolic activity of the microorganism, then by reacting it leads to a change in the cellular function and finally causes the death of the microorganism.
Chlorine, calcium hypochlorite, trichloroisocyanuric acid and sodium bromide can be oxidizing and isothiazoline, triazine and glutaraldehyde are considered non-oxidizing biocides.
Characteristics of isothiazolin
Biocides are mostly clear and almost colorless liquid. Isothiazoline (C3H3NOS) is the most famous type of biocide, whose scope of use also ends with industrial detergents. Since aqueous solutions are susceptible to the growth and survival of bacteria, it is used as a disinfectant that controls microbial and fungal growth in this category of products. Shampoo, dishwashing and laundry powders are examples of the use of this substance.
Oil and gas transmission pipes are subject to microbiological corrosion phenomenon. This phenomenon is a type of corrosion that is affected by microorganisms in drilling pipes, pipelines or any other metal oil and gas facilities. In the phenomenon of biological corrosion, a type of bacteria known as iron-eating and sulfate-eating bacteria stick and grow on the surface of gas and oil transmission pipes. By forming sediment and biological corrosion on the surface of the pipe, these bacteria reduce water supply and ultimately destroy it.
Application of biocide in oil and gas industry
Another important issue caused by harmful bacteria in oil and gas extraction industries is the souring phenomenon. Microbial growth is an important factor in this phenomenon. These microbes acidify the gas, which causes corrosion. One of the factors that make gas sour is hydrogen sulfide, which continues to sweeten it by adding biocides.
Polyactive biocides used in oil and gas industries have been formulated and optimized to have the best performance. These additives prevent the formation of sediment, sludge, corrosion and biofilm and are used in small amounts during water injection into the well.