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Mathematical model of liquid accumulation in lowered areas of gas pipeline

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Category: Solid-state physics, mineral processing

Last Updated on 28 July 2014

Published on 13 August 2013

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Authors:

A.V. Ugrynovskyi, Ivano-Frankivsk National Technical University of Oil and Gas, Postgraduate Student of the Department of mining and exploitation of oil and gas deposits, Ivano-Frankivsk, Ukraine

R.M. Kondrat, Dr. Sci. (Tech.), Professor, Ivano-Frankivsk National Technical University of Oil and Gas, Head of the Department of mining and exploitation of oil and gas deposits, Ivano-Frankivsk, Ukraine

P.R. Gіmer, Cand. Sci. (Tech.), Associate Professor, Ivano-Frankіvsk National Technical University of Oil and Gas, Associate Professor of the Department of oil and gas hydromechanics, Ivano-Frankivsk, Ukraine

Abstract:

Purpose. Forecasting of limit velocity of gas flow which is necessary for full carrying away of liquid accumulated in lowered sections of relief pipeline.

Methods. Mathematical model of gas-liquid mixture flow in rising section of relief pipeline has been offered. The model is based on the system of equations of balance of forces which act on gas and water phases and enables to estimate limit velocity of gas flow which is necessary for full carrying away of liquid from lowered section of pipeline. Estimation of model adequacy was conducted through comparison of calculated values with results of experimental tests.

Results. It has been found the equation which determine limit velocity of gas flow, that is necessary for full carrying away of liquid from lowered section of relief pipeline depending on the angle of slope of rising section to horizontal axis. Main factors which influence the gas flow limit velocity value have been marked out. It has been shown that widening of pipeline internal diameter resulted inincreasing of gas flow limit velocity value and vice versa increasing of average pressure of gas in pipeline resulted in decreasing of this velocity.

Originality. Mathematical model of liquid accumulation flow in lowered sections of pipeline has been built and equation for calculation of gas flow limit velocity which is necessary for full carrying away of this liquid has been found.

Practical value. The founded equation can be used for choosing the optimal operation mode of gas pipelines in systems of gas production gathering.

References:

1. Кутуков С. Проблема построения технологической модели нефтепровода / С.Е. Кутуков // Нефтегазовое дело. – 2004. – Т.1. – С. 1–11.

Kutukov, S.E. (2004) “The problem of constructing the technological model of the pipeline”, Neftegazovoye delo, vol. 1, pp. 1 – 11.

2. Кондрат Р. Лабораторні дослідження процесу руху газорідинних сумішей у рельєфному трубопроводі / Роман Кондрат, Андрій Угриновський // Розвідка та розробка нафтових і газових родовищ. – 2012. – № 4. – С. 118–128.

Kondrat, R.M. (2012) “Laboratory research of the gas-liquid mixture movement through the relief pipeline”, Rozvidka ta rozrobka naftovykh i gazovykh rodovyshch, No 4, pp. 118–128.

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