Technical Requirements TU 2122-008-53501222-2002

Purpose of Use

Complex acidizing package KSPEO-4 grade DB (further referred as KSPEO-4) is designed for stimulation treatment of oil and gas production wells in sandstone reservoirs with the level of clayiness more than 5 % , permeability of more than 50 mD, tending to sand-flowing, with high reservoir temperature (up to 110 °C). The acidizing compound shows the properties of a water-repelling agent for porous rock. It also works as crude oil de-emulsifier and contains HCl corrosion inhibitor protecting the equipment in the fields.

Before the stimulation treatment of oil and gas production wells with acidizing package KSPEO-4 the package of KSPEO-2 is pumped  into the well as a spacer.

Acidizing package KSPEO-4 is HCl-based compound in which special complex of surfactants, corrosion inhibitors and modifying  agents is added.

Application Area

• Enhancing oil and gas recovery in production wells in sandstone reservoirs with watering level up to 60 %, especially when the production wells reduced the productivity due to precipitation and blockage of the critical area of formation with inorganic matters, and due to oil-water emulsions.
• Fresh well development after drilling operations, well conversion into new production horizons, re-start of the wells after conservation.

Customer Benefits

• High permeability in rock porous area of the reservoir due to low inter-phase tension between oil and KSPEO compound
• Low reaction speed for sandstones even in the condition of high temperatures, which allows deep penetration of the compound into the formation.
• Ability to stabilize ferric-ions in diluted state  when dissolving ferruginous rocks and precipitates.
• Dissolving power for salts and hydrocarbon.
• Effective prevention of forming trice oil-and-acid emulsions with high-viscosity.
• High dispersive power for paraffin and mercaptanes removal (the size of paraffin and mercaptanes dispersed particles in the acidizing compound  KSPEO-4 is not bigger than 1 mm).
• Ability to minimize the content of sands in the extracted product.
• Low corrosiveness.

Process Technique

Complex acidizing package KSPEO-4 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.

The working fluid is pumped into the formation with average consumption of 1.2-1.5 m³ per one meter of payzone. The amount of KSPEO-2 spacer pumped before KSPEO-4 depends on the conditions of the well.

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

Complex acidizing package KSPEO-4 is certified for the application in oil-and-gas field.