Laboratory studies on the selection and testing of chemical compositions

Home | Services | Laboratory studies on the selection and testing of chemical compositions

Each field (implementation object) has a different composition and properties of the formation and reservoir fluids, which requires an individual approach to chemical composition selection. Taking into account the reservoir characteristics (temperature, permeability, TDS, etc.), pre-selection of chemical compositions samples is carried out. In order to clarify and select the optimal one in terms of technological efficiency and cost, it is necessary to conduct a set of laboratory studies.

In case of selecting a chemical composition for polymer flooding, implementation of the main studies are:

Rheology&stability studies:

— input control of polymers, determination of active content, intrinsic viscosity, hydrolysis degree, molecular weight of the samples;
— determination of the dissolution time and the amount of undissolved solids when the polymer is dissolved in water from the RPM system;
— rheological curves plotting (determination of the dependence of the polymer solution viscosity on the concentration and shear rate);
— assessment of thermal and mechanical degradation of polymer solutions;
— determination of static adsorption of polymer samples;

Filtration studies:

— evaluation of dynamic adsorption of polymer samples;
— determination of displacement efficiency, resistance factor and residual resistance factor;
— evaluation of the mechanical degradation of the polymer solution when passing through the porous medium of the reservoir model.

When selecting a chemical composition for surfactant-polymer flooding, the following types of research are additionally performed:

Rheology&stability studies:

— input control of surfactants, assessment of appearance, pour point, density, mass fraction of the active content;
— assessment of surfactants solubility and compatibility with produced water and water from the PRM system;
— determination of the dependence of the interfacial tension on the concentration of surfactants;
— assessment of phase behavior (determination of microemulsion types);
— assessment of compatibility with polymer;
— determination of the thermal stability of the surfactant-polymer formulation.

Filtration studies:

— determination of the surfactant-polymer composition displacement efficiency;
— relative permeability determination after chemical injection;
— determination of dynamic adsorption of surfactant polymer composition.

* — the above list is general (depending on object conditions and project design can be adjusted).

Сontact us

    Physicochemical eor techniques

    Expert and analytical works on development of EOR project design

    Laboratory studies on the selection and testing of chemical compositions

    Chemicals for surfactant-polymer flooding

    Dedicated equipment for polymer and surfactant-polymer flooding

    Maintenance and operation of injection equipment during the implementation of cEOR projects

    Thanks for choosing us!

    Leave your message and we will contact you as soon as possible.