Scientific and technical journal

«Oilfield engineering»

ISSN 0207-2351

Oilfield engineering
№ 8 (644), August 2022
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Self-generating foam polymer compositions for water and gas insulation works

UDC: 544.773.432:622.276.344:678.745.842
DOI: 10.33285/0207-2351-2022-8(644)-35-45

Authors:

STRIZHNEV VLADIMIR A.1,
AKHMETOV ALFIR T.2,
VALIEV AZAT A.2,
ARSLANOV ILDAR R.1,
SERGEEVA NATALIA A.1,
LENCHENKOVA LYUBOV E.3,
MARKIN NIKITA I.3,
FAKHREEVA ALSU V.1,
RATNER ARTEM A.1,
TELIN ALEXEY G.1

1 Ufa STC, Ufa, Russia
2 Mavlyutov Institute of Mechanics UFRC RAS, Ufa, Russia
3 Ufa State Petroleum Technical University, Ufa, Russia

Keywords: grouting compounds, self-generating foam polymer systems, foam multiplicity, residual resistance factor, effective viscosity, rheological parameters, oscillatory test, creep and recovery

Annotation:

The article provides an experimental justification for the use of a self-generating foam polymer system (FPS) for water and gas insulation in producing wells. The generation of gas – nitrogen – occurs in this FPS due to the chemical reaction of inorganic salts, and the formation of foam occurs when a gas bubble penetrates into the volume of the crosslinked polymer solution. A feature of the developed system is the immutability of the foam over time, provided by the structural and mechanical properties of the cross-linked polymer composition, which causes a high water and gas insulation effect. On the basis of physical-chemical, rheological and filtration experiments, the ratio of the insulating composition components is optimized. The selectivity of the FPS insulating effect on cracks and large pores is shown. Filtration and rheological characteristics of the composition to be used when calculating the design of repair and insulation works are obtained.

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