Versatile dissolvent of asphaltene-resin-and- paraffin deposits NEFRAS-M

TU 2458-058-53501222-2006

Versatile dissolvent NEFRAS-M is designed for the  treatment of oil-field equipment with the purpose of removing asphaltene-resin-and-paraffin deposits.

Dissolvent NEFRAS-M is a mixture of aromatic and aliphatic hydrocarbons, highly effective co-solvents: primary, secondary and tertiary alcohols of iso- and normal structure (С2-С6), ethers and esters and surfactants.

Three grades of NEFRAS-M are available varying in the concentration of aromatic hydrocarbons.

  • NEFRAS-M grade С3 is used for removing of asphaltene-resin-and-paraffin deposits which mainly contain paraffin hydrocarbons and resins.
  • NEFRAS-M grade С4 is used for removing of asphaltene-resin-and-paraffin deposits which mainly contain resins and asphaltenes.
  • NEFRAS-M grade С5 is used for removing of asphaltene-resin-and-paraffin deposits which mainly contain asphaltenes.

Application Area

  • Used as a spacer at acidizing in production wells complicated with deposition of paraffin hydrocarbons with high crystallization temperature in the critical area of formation  while degassing and cooling of oil. 
  • Used  instead of  solvents for natural gas liquids at well flushing and paraffin hydrocarbon removing.

Properties

Property

NEFRAS-M grade C3

NEFRAS-M grade C4

NEFRAS-M grade C5

Appearance

Thin fluid  with the colour varying from colourless to dark-brown

Density at 20 ºС, g/cm3, within the range

0.70-0.80

0.80-0.83

0.80-0.83

Mass concentration of aromatic 
hydrocarbons, %, within the range

0  -  5

5  -  30

30  -  60

Boiling temperature, ºС , not lower

60

30

30

End boiling point, °C, not higher 

300

Freezing point,°С, not higher

Minus 50

Customer Benefits
  • High dissolving capacity.
  • Ability to remove organic deposits with different ratio of asphaltene wax and paraffins.
  • Efficient cleaning of treated surfaces from asphaltene-resin-and-paraffin deposits.

Process Technique

The amount of NEFRAS-M of the particular grade necessary for the treatment depends on the geological and technical conditions of the well to be treated as well as on the physical and chemical  characteristics of the oil and of the deposits.

Optimal amount of NEFRAS-M injected as a spacer varies between 10% and 20% of the volume of acidizing fluid.

For the additional information about NEFRAS-M it is recommended to contact the specialists of Sales & Service Department of Polyex company.

Packing & Delivery 

Versatile dissolvent NEFRAS-M is delivered in metal drums by 200 l. Transportation with automobile and railway cisterns is possible.

The chemical can also be packed in other type of hermetic containers according the customers’ requests.

Storage 

 Versatile dissolvent NEFRAS-M is to be stored in hermetic containers.

Guaranteed shelf life of the product is 12 months.

Versatile dissolvent NEFRAS-M is certified for the application in oil-and-gas field.

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