Article: New correlations for water content of sweet and sour natural gases Journal: International Journal of Oil, Gas and Coal Technology (IJOGCT) 2013 Vol.6 No.4 pp.392 - 407 Abstract: The water content of natural gas is very important for gas pipeline operators. This paper developed an improved correlation model which is easy-to-use and with an appropriate accuracy to predict the water content of both the sweet and sour gases. The new correlations are generated from the Wang correlation combined with the Keenan-Keyes model. The temperature correction terms as well as the CO2 and H2S ones were introduced to this method for a better accuracy. The limited experimental data validate the new correlations are applicable for the natural gas with the mole fraction of CH4 > 70%. The sweet gas correlation is valid from −2°C to 100°C and 0.49 MPa to 13.79 MPa. The sour gas correlation is valid from 34°C to 71.11°C and 2.47 MPa to 13.79 MPa for gas mixture when CO2 < 20% and H2S < 29%. The average relative deviation between literature and correlation values for sweet gas is 3.03%, and that for sour gas is 4.44%. [Received: February 2, 2012; Accepted: June 2, 2012] Inderscience Publishers - linking academia, business and industry through research

Title: New correlations for water content of sweet and sour natural gases

Authors: Changjun Li; Xia Wu; Wenlong Jia; Ouyang Sun

Addresses: School of Petroleum Engineering, Southwest Petroleum University, Xindu Avenue No. 8, Chengdu City, Sichuan Province, China; CNPC Key Laboratory of Oil and Gas Storage and Transportation, Southwest Petroleum University, Xindu Avenue No. 8, Chengdu City, Sichuan Province, China ' School of Petroleum Engineering, Southwest Petroleum University, Xindu Avenue No. 8, Chengdu City, Sichuan Province, China ' School of Petroleum Engineering, Southwest Petroleum University, Xindu Avenue No. 8, Chengdu City, Sichuan Province, China ' PetroChina West-East Pipeline (Marketing) Company, Room 2007, 20th Floor, Tung Shing Building, Fushan Road No. 458, Pudong District, Shanghai, China

Abstract: The water content of natural gas is very important for gas pipeline operators. This paper developed an improved correlation model which is easy-to-use and with an appropriate accuracy to predict the water content of both the sweet and sour gases. The new correlations are generated from the Wang correlation combined with the Keenan-Keyes model. The temperature correction terms as well as the CO₂ and H₂S ones were introduced to this method for a better accuracy. The limited experimental data validate the new correlations are applicable for the natural gas with the mole fraction of CH₄ > 70%. The sweet gas correlation is valid from −2°C to 100°C and 0.49 MPa to 13.79 MPa. The sour gas correlation is valid from 34°C to 71.11°C and 2.47 MPa to 13.79 MPa for gas mixture when CO₂ < 20% and H₂S < 29%. The average relative deviation between literature and correlation values for sweet gas is 3.03%, and that for sour gas is 4.44%. [Received: February 2, 2012; Accepted: June 2, 2012]

Keywords: natural gas; water content; empirical correlation; sweet gas; sour gas; Wang correlation; Keenan-Keyes model; correlation modelling.

DOI: 10.1504/IJOGCT.2013.054853

International Journal of Oil, Gas and Coal Technology, 2013 Vol.6 No.4, pp.392 - 407

Received: 01 Mar 2012
Accepted: 02 Jun 2012
Published online: 29 Jan 2014 *

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Title: New correlations for water content of sweet and sour natural gases

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