STUDY OF RHEOLOGICAL PROPERTIES OF POLYMER SOLUTIONS

Karlygash Bissembayeva

Caspian University of Technology and Engineering named after Sh .Yessenov

Albina Khadieva

Caspian University of Technology and Engineering named after Sh .Yessenov

STUDY OF RHEOLOGICAL PROPERTIES OF POLYMER SOLUTIONS

 

Annotation. The long-term operation of the deposit, the alternation of reservoir zones with high and degraded filtration and capacitance properties due to the heterogeneity of the reservoir, the deformation of the development system due to downtime and inactivity of wells predetermined the selective movement of water through the most permeable layers. As practice shows, the widespread use of traditional flooding technology does not ensure the effective production of residual reserves from low-permeable and highly watered formations. Therefore, increasing the degree of oil extraction from the depths of the developed fields using effective methods of active impact on water-oil-saturated formations is an important scientific and technical task facing the oilmen of the republic.

One of the most effective and promising methods of stabilizing oil production is physics-chemical technologies based on the use of injection of polymer compositions.

The main purpose of injection of polymer compositions is to equalize the heterogeneity of productive layers by reducing the mobility of the displacing agent in highly conductive interlayers and increasing the coverage of the reservoir by flooding both in power and in stretch.

As is known, the effectiveness of the use of technologies based on polymer solutions depends on their good selective filterability into zones with high water saturation, which allows creating water-insulating screens in the desired direction and to a sufficient depth.

It is known that the effective use of polymer solutions depends on the influence of various factors: molecular weight, polymer concentration in solution, filtration rates, reservoir permeability, as well as such an important parameter as the rheological properties of polymer solutions. The study of the rheological properties of polymer solutions allows us to substantiate and propose for practical implementation effective integrated technologies for increasing oil recovery during the operation of the oil fields under consideration.

In this work, the rheological properties of polyacrylamide, physical parameters, taking into account their physics-chemical properties, are studied. The influence of mineralization and water hardness on polymer solutions is considered.  The issues of mechanical destruction of polymers have been studied. The degree of mechanical destruction of the polymer is estimated based on the results of the study of the rheological properties of the polymer sample.

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Keywords:Polymer; polyacrylamide; polymer flooding; water; solution; polymer molecule; degradation; adsorption; shear rate; viscosity; mechanical degradation; mineralization; filtration properties.

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УДК 622.245

ГРНТИ 52.47.27

DOI 10.56525/RMEU4412