«Oilfield engineering»

Modernization of low-temperature separation technology for natural gas purification from water and other contaminants

UDC: 66.074
DOI: -

Authors:

¹ National Research Tomsk Polytechnic University, Tomsk, Russia

Keywords: low-temperature separation, in-tube separator, integrated gas treatment plant, natural gas

Annotation:

To date, most of the gas fields that have been in operation since the second quarter of the 20th century have practically exhausted their resource capabilities for the technologies that existed when they were put into operation. Negative factors of their development are the following ones: strong reservoir pressure drop, wells high water-flooding caused by the applied technology of raw hydrocarbons production technology, presence of a large number of acid gases and other compounds that worsen operational and transport characteristics. The authors of the article analyze effective natural gas treatment technologies, describe the most effective process for natural gas purification from trace impurities of water and other harmful substances. Based on the research results, the most effective technology has been proposed, namely the use of gas low–temperature separation together with an in-tube separator to remove the main volume of water from natural gas at the first and second stages and the final and deep purification of natural gas from water impurities and harmful substances. The use of an in-tube separator in a complex natural gas purification plant in conjunction with a low-temperature separator, natural gas purification from micro-impurities of water and other substances allows achieving a deep degree of gas purification from micro-impurities of water to dew point temperature up to minus 40 °C, leaving gas transportation from offshore platforms possible. The conditions of liquid-gas phase equilibrium during operation of the in-tube separator are revealed.

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