Acid stimulation fluid KSPEO-2

Acid stimulation fluid for oil & gas production wells KSPEO-2

ТU 2122-056-53501222-2015

Acid stimulation fluid KSPEO-2 of complex action grade is designed for stimulation of oil and gas production wells with carbonate reservoirs and sandstone reservoirs with low permeability with high clayiness. KSPEO-2 also shows the properties of a water-repelling agent for porous rock.

Acid stimulation fluid KSPEO-2 is HCl-based compound in which special complex of surfactants, corrosion inhibitors and modifying agents is added. KSPEO-2 is available in two grades KSPEO-2 grade A and KSPEO-2 grade B.

Application Area

  • Fresh well completion after drilling operations in carbonate and sandstone reservoirs; switching into other production horizons and well development after conservation and temporary non-operation.
  • Acidic fracturing with flow-diverting emulsion containing emulsifier EKS-EM® / EMITRIT®
  • Stimulation of oil and gas recovery in production wells with water cut up to 60 %, which have reduced productivity due to precipitation of non-organic type and due to oil-in-water emulsion forming. 

Acid stimulation fluid KSPEO-2 may be used for highly drowned oil and gas production wells (watering level over 70 %) after temporary blockage of high-permeability zones via prior injection of hydrocarbon emulsions with emulsifiers EKS-EM® (for formation temperatures under 70 °C/ 158 °F)/ EMITRIT® (for  formation temperatures under 100 °C/ 212 °F). 

In case the level of watercut is 80-90 % the blockage of water influx into the well may be performed with the sediment forming composition TAMOLEX ®. After water influx blockage well acidizing with KSPEO-2 is performed.



KSPEO-2 grade А

KSPEO-2 grade B


Liquid, varying from colorless to brown

Mass concentration of acid, %,
within the range of



Specific gravity at 20 °C, g/cm3,
not less than


Customer Benefits
  • Low reaction speed for carbonates, which allows deep penetration of the stimulation fluid into the formation.
  • Ability to stabilize iron ions in diluted state  when dissolving ferruginous rocks and precipitates.
  • High permeability in rock porous area of the reservoir due to low inter-phase tension between oil and and KSPEO-2.
  • High dissolving power for salts and hydrocarbon.
  • Effective prevention of forming trice oil-and-acid emulsions with high-viscosity.
  • High dispersive power for paraffin, resin and ashaltene deposits.
  • Low corrosiveness.

Process Technique

Complex acidizing package KSPEO-2 grade A is ready-to-use composition.

Complex acidizing package KSPEO-2 grade B is supplied in concentrated form. The working solution is to be prepared at site before the start of acidizing operation. Concentrated compound is diluted with fresh water with the ratio 1:1 by volume.

To select the optimal design of application, i.e. consumption of acid stimulation fluid and the technique of application, it is recommended to contact the specialists of Sales & Service Department of Polyex company.


KSPEO-2 is delivered in PE containers with the capacity of 1 m3 or in rubberized cisterns or in acid tank truck. 

Acid stimulation fluid KSPEO-2 is certified for the application in oil-and-gas field.


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