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Study of foam formation process with use of water solutions of foam-forming PAIRS and foam stabilizers

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Category: Mining

Last Updated on 23 July 2017

Published on 23 July 2017

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Authors:

R.M.Kondrat, Dr. Sc. (Tech.), Prof., Ivano-Frankivsk National Technical University of Oil and Gas, Ivano-Frankivsk, Ukraine, e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.; This email address is being protected from spambots. You need JavaScript enabled to view it.

N.S.Dremliukh, Ivano-Frankivsk National Technical University of Oil and Gas, Ivano-Frankivsk, Ukraine, e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.; This email address is being protected from spambots. You need JavaScript enabled to view it.

A.V.Uhrynovskyi, Cand. Sc. (Tech.), Ivano-Frankivsk National Technical University of Oil and Gas, Ivano-Frankivsk, Ukraine, e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.; This email address is being protected from spambots. You need JavaScript enabled to view it.

Abstract:

Purpose. Evaluation of foam-forming properties of various surface-active substances (SAS) with addition of stabilizing agents to obtain stable foams.

Methodology. A laboratory model of a well was developed to study the impact of type, concentration and temperature of SAS and stabilizing agents on the foam formation process properties in fresh water. In the course of studies the height of foam level in the glass column at the end of the foam formation process and time required to extract the half of fluid bound in the foam were determined; according to their values, the foam expansion ratio and stability were defined.

Findings. Based on the results of experimental studies using the laboratory model of a well, graphical dependencies of the foam expansion ratio and stability on determining parameters (SAS and stabilizing agent type, concentration and temperature) were plotted; according to these parameters, SAS type and stabilizing agents were selected to ensure the highest values of the foam expansion rate and stability. Using mathematical statistical methods, the optimum values of SAS and foam stabilizing agent concentration were determined, at higher values the foam expansion ratio and stability vary insignificantly. Two compositions of SAS and foam stabilizing agents were developed ‒ one of them is proposed to be used for flushing out sand plugs in the bottom hole, the other one shall be used for continuous injection into the well annular space to prevent solid phase accumulation down the hole.

Originality. Based on the experimental studies, patterns of SAS water solutions foaming with and without addition of foam stabilizing agents were determined, a new composition of SAS and stabilizing agents was developed for stable foam formation with modelling of bottom-hole temperature (from 20 to 60 °С).

Practical value. The optimum values of foam-forming SAS and stabilizing agent concentrations in water solutions were determined to obtain stable foams. Research results can be used to flush out sand plugs in the bottom holes at depleted gas and gas condensate fields and to prevent accumulation of solids down the hole.

References

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7. Lutfullina, G.G. and Zinnatullina, Z.A., 2015. On possibility of regulation of SAS compositions foam-forming ability. Kazan Technological University bulletin, 18(15), pp. 197‒199.

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