Chemical agents

Vast variety of geological and physical characteristics of oil and formation waters produced from different reservoirs calls for innovative and customized solutions with controllable and adjustable properties of chemicals used in stimulation technologies

Specialists of Ufa Scientific and Technical Center developed a line of chemical agents under the trademarks of NGT-Chem and PSK which are currently used for successful implementation of projects under contracts with operators and oil producing companies


Chemicals are manufactured for the following applications:

In case of questions regarding applicability or procurement of our chemicals don’t hesitate to  contact our specialists   
 



CHEMICALS FOR REMEDIAL CEMENTING AND SELECTIVE ISOLATION

Modified polymer-disperse composition NGT-Chem-1
Technical specifications 2458-001-12726854-2014
PDF-0.5MB, in Russian
Developed for low reservoir temperatures and low salinity formation waters
  • Dissolution time – less than one hour
  • Adjustable gel formation time under reservoir conditions
  • Forms solid gels from free-flowing to moderately elastic (deformable)
  • Highly resistant to temperature and mechanical breakdown
  • With specially added fillers helps to isolate thief zones with high water intake rates
  • High penetrating capacity
  • One-component system (one pack)
  • No additional chemicals required
  • No need for a lot of equipment for preparation at the well site
Modified polymer-disperse composition NGT-Chem-3
Technical specifications 2458-003-12726854-2014
PDF-0.5MB, in Russian
Developed for high reservoir temperatures and high salinity formation waters
  • Dissolution time – less than 30 minutes
  • Adjustable gel formation time under reservoir conditions
  • Forms solid gels from moderately elastic (deformable) to tough
  • Highly resistant to temperature and mechanical breakdown
  • With specially added fillers helps to isolate thief zones with high water intake rates
  • One-component system (one pack)
  • With a special additive to regulate gel formation the gelation time at Т=95 С is from 5 to 12 hours
  • Selectiveness



CONFORMANCE CONTROL CHEMICALS

Реагент NGT-Chem-2
Technical specifications 2458-002-12726854-2014
PDF-0.5MB, in Russian
The chemical is a concentrated water solution of a sodium polyacrylate-based water-soluble polymer with various structure-forming additives
  • Delivered to the wellsite in a concentrated form thus cutting transportation costs (concentrated commodity form)
  • The technology of NGT-Chem-2 application involves squeezing into the reservoir the solution of the polymer included as a compound of NGT-Chem-2 followed by its polymerization in-situ (under reservoir conditions). The polymerization takes place when РВ-3П-1 chemicals are added
Scope of application:
  • Conformance control
  • Water-bearing zones shut-off (isolation)
  • Prevention of cross-flows behind the casing
  • Prevention of cross-flows behind the casing
  • Lower differential pressure on the cement sheath after remedial cementing and isolation
Precipitate and gel forming composition NGT-Chem-6
Technical specifications 2458-006-12726854-2016
PDF-0.5MB, in Russian
The chemical consists of a hydrolyzed water-based polymer solution with various structure-forming additives

Developed for high reservoir temperatures and high salinity formation waters
  • Maximum resistivity to thermal and salt breakdown maintaining high rheological properties
  • Selective permeability
  • Delivered to the wellsite in a concentrated form thus cutting transportation costs (concentrated commodity form)
  • Low freezing temperature (- 25 °С)
Scope of application: conformance control for water injection wells



CHEMICALS FOR HEATING BOTTOMHOLE AREA AND RCP-PROPPANT PLACEMENT

Improved exothermic composition PSK-3 for heating bottomhole area
Technical specifications 2458-006-12726854-2015
PDF-0.5MB, in Russian
The agent is a two-component system. The heating effect produced by PSK-3 on the bottomhole area is based on the exothermic reaction between two water soluble components

Advantages:
  • No strong acids in the composition (HCl, HF)
  • No nitrogen oxides (NO, NO22) are emitted in the reaction
  • Reaction products of PSK-3 composition are water soluble, no risk of formation damage or clogging
Scope of application Gas depression simulation (gas lift)
  • Thermal placement of proppant RCP
  • Clearing asphaltenes, resins, paraffins in a well (no need to stop downhole pumping equipment)
  • Gas depression simulation (gas lift)
  • Removing gas hydrate plugs

Exothermic composition PSK-4 (ПСК-4) for heating bottomhole area in wells with heavy fluid losses
Technical specifications 2458-006-12726854-2015
PDF-0.5MB, in Russian
The agent is a three-component system. The treatment effect of PSK-4 on the near wellbore zone is based on its thermal heating in the result of the heat-generating reaction of the precipitate obtained from compound А and the solvent for the precipitate – compound B. Such process approach guarantees the reaction takes place at the target treatment depth in a well

Advantages:
  • Used in wells with thief zones (no return intervals where liquid components of PSK-2 and PSK-3 are lost into the formation)
  • The precipitate allows easy filtration of fluids injected into a well
  • Reaction products are water soluble, no risk of formation damage or clogging
Scope of application
  • Thermal placement of proppant RCP
  • Removing gas hydrate plugs


CHEMICALS FOR PREVENTION AND MITIGATION

NGT-Chem-DMG Corrosion Inhibitors
Technical specifications 2458-005-12726854-2015
PDF-0.5MB, in Russian
  • NGT-Chem-DMG brand А is a carbon dioxide corrosion inhibitor used in the oil industry (Technical specifications 2458-004-12726854-2015)
A self-dispersed agent used for protecting oilfield equipment from carbon dioxide attacks in oil gathering systems and reservoir pressure maintenance systems

Scope of application: recommended for dosing into flow lines, pump manifolds of injection wells, pipelines. Protection efficiency 93-99.5%
 
  • NGT-Chem-DMG brand Б is an inhibitor of carbon dioxide and/or hydrogen sulfide corrosion, bactericide used in the oil industry (Technical specifications 2458-004-12726854-2015)
A water dispersed agent used for protection of oilfield equipment from corrosion caused by sulfate-reducing bacterial activity (inhibits the growth of the bacteria). Contains a bactericide in the composition

Scope of application: recommended for dosing into flow lines, pump manifolds of injection wells, pipelines. Protection efficiency 90-99%
 

Scale Inhibitor NGT-Chem-4 brand
Technical specifications 2458-004-12726854-2015
PDF-0.5MB, in Russian
  • Scale inhibitor NGT-Chem-4 А is used in the oil industry to prevent buildup of poorly soluble compounds in oil gathering systems and reservoir pressure maintenance systems
  • Scale and corrosion inhibitor NGT-Chem-4 Б is used in the oil industry to prevent buildup of poorly soluble compounds and additional protection of equipment against corrosion in oil gathering systems and reservoir pressure maintenance systems

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