Combat oil reservoir souring
Yara markets Hydrogen Sulphide (H₂S) reduction solutions for the oil industry for souring prevention and mitigation, and to fight corrosion in pipelines and reservoirs. Workers in this industry are exposed to the dangers of hydrogen sulphide. Independent academic reports, laboratory and field tests promote nitrates to reduce hydrogen sulphide formation and help improve work safety. PetroCare is applied primarily into seawater injectors on the oil field. This is an environmentally friendly solution in comparison with alternatives.
PetroCare offers customers the benefit of Yara’s extensive experience of controling H₂S in industrial processes and wastewater treatment plants worldwide. PetroCare is an environmentally friendly solution compared to the alternatives available on the market.
Prevent the formation of H₂S, through stimulation of a natural processes
Reservoir souring results when water injection is used for secondary oil recovery, especially in offshore installations where sulphate-rich seawater is used. The lack of oxygen, warm temperatures and the presence of sulphate, stimulates naturally-occurring microbes which then produce toxic hydrogen sulphide (H₂S). This action leads sweet oil to sour. Sour oil has a lower market value and the presence of H₂S gas at the producer can lead to material damage (MIC corrosion), restrict production rates and lead to serious occupational health issues. Sulphide gases, especially H₂S, are dangerous for humans, materials and the environment.
An environmentally friendly solution
PetroCare is dosed into the injected seawater in small concentrations and this promotes the microbes to generate harmless nitrogen gas - rather than harmful sulphide which is produced when the sour conditions prevail. Speciality nitrates change the bacterial environment, so that they no longer produce sulphide gases. Nitrate is a natural substance present in soil, where it is a major nutrient for plants. Yara’s nitrate-based technology is, therefore, a natural, environmentally friendly way to eliminate the problems caused by H₂S.
PetroCare is a proven technology against reservoir souring
PetroCare is used worldwide and has been chosen by a number of oil companies as their main souring mitigation strategy for oil fields in the North Sea, Latin America, the Gulf of Mexico, off the coast of West Africa, Russia and the Far East. Published case reports show that where nitrate is applied correctly it can provide a good preventative/ mitigation strategy for H₂S generation and for souring control.