Natural Gas Processing Assessment at Sirte Oil Company by Utilizing Tri-Ethylene Glycol (TEG) Techniques
DOI:
https://doi.org/10.37375/njdw2n79الكلمات المفتاحية:
Natural gas processing, Tri-Ethylene Glycol (TEG), Dehydration performance, Phase behavior, Compressibility factor, Al-Erada gas field, Sirte Basinالملخص
This study evaluates the operational performance and processing efficiency of the Tri-Ethylene Glycol (TEG) natural gas dehydration unit at the Al-Erada gas field, operated by Sirte Oil and Gas Company in the Sirte Basin, Libya. Natural gas composition was analyzed, establishing methane as the primary constituent (87.50 mol%), alongside ethane (4.00 mol%), heavier paraffinic hydrocarbons, and minor impurities including nitrogen (0.64 mol%) and carbon dioxide (0.80 mol%).
Physical and pseudocritical properties were evaluated, yielding a gas specific gravity of 0.65, molecular weight of 18.83 g/mol, and a compressibility factor (z) of 0.91 under operating conditions. At a field gas processing throughput of 50.0 MMscf/day. the TEG dehydration system effectively removes 52.50 Ib/day of water vapor, achieving an exit gas dew point of 23°F Comparative evaluations between field operational parameters and theoretical design calculations demonstrated high consistency: lean glycol purity was calculated at 98.15% (vs. 98.70% field data), and reboiler operating temperature was estimated at 368°F (vs. 370°F field data). The contactor glycol circulation rate was evaluated at 2.50 GPM compared to the field operating rate of 2.00 GPM. The results confirm that the TEG dehydration unit operates efficiently, meeting all international pipeline specifications and safety criteria for natural gas transmission.
المراجع
[1] Abou El Leil, I.M., Al Gaddafi A. Abdelrahim & Khaled M. Mezughi (2019) Natural Gas Processing at Jalo 59 Gasfield. International Science and Technology Journal, Volume 20, P. 1-19.
[2] Ali Al-hadi Al-aswed (2017) Natural Gas Dehydration Process by Mono &Tri-Ethylene-Glycol. Dept. of petroleum Engineering, Zawia University. University Bulletin – 133 ISSUE No.19- Vol. (2).
[3] Allison, I. S. and D. F. Palmer. (1980) Geology. 7th ed. New York: McGraw- Hill.
[4] Ailin J (2018) Progress and prospects of natural gas development technologies in China. Nat Gas Ind B 5:547–557
[5] Ambrose, Greg, (2000) The geology and hydrocarbon habitat of the Sarir Sandstone, SE Sirt Basin, Libya: Journal of Petroleum Geology, v. 23, p.165–192.
[6] Anyadiegwu, C.I.C., Anthony Kerunwa, and Patrick Oviawele (2014) Natural Gas Dehydration Using Triethylene Glycol (TEG). Petroleum & Coal 56(4) 407-417, 2014.
[7] Baric, G., Spanic, D., and Maricic, M., (1996) Geochemical characterization of source rocks in NC-157 Block (Zaltan Platform), Sirte Basin, in Salem, M.J., El-Hawat, A.S., and Sbeta, A.M., eds., The geology of Sirte Basin: Amsterdam, Elsevier, v. II, p. 541–553.
[8] Bavoh CB, Partoon B, Lal B, Keong LK (2017) Methane hydrate-liquid-vapor-equilibrium phase condition measurements in the presence of natural amino acids. Journal of Natural Gas Science and Engineering 37:425–434
[9] Burwood, R., (1997) Petroleum systems of the east Sirte Basin: American Association of Petroleum Geologists Bulletin, v. 81, p. 1365.
[10] Campbell, J. M. (1998) Gas Conditioning and Processing, Vol. 2. Norman, OK: Campbell Petroleum Series.
[11] Carr, N. L., Kobayashi, R., and Burrows, D. B. (1954) Viscosity of Hydrocarbon Gases Under Pressure, Trans., AIME, 201, 264-272.
[12] Carroll, J.J. (2002) The Water Content of Acid Gas and Sour Gas from 100° to220°F and Pressures to 10,000 PSIA. Presented at the 81st Annual GPA Convention, Dallas, TX, March 11–13.
[13] Dan Laudal Christensen (2009) Gas Dehydration, Thermodynamic Simulation of the Water/Glycol Mixture. Aalborg University Esbjerg.
[14] Economides, M. J., A. S. Demarchos, and L. Saputelli. (2002) "Energy Sources and Energy Intensity for the Twenty-First Century." Paper.
[15] Energy Information Administration (EIA), Office of Oil and Gas, January (2006).
[16] Firas Alnili (2018) Simulation study of sweetening and dehydration of natural gas stream using MEG solution. The Canadian Journal of Chemistry Engineering Banner.
[17] Gambelli AM and Rossi F (2019) Natural gas hydrates: Comparison between two different applications of thermal stimulation for performing CO2 replacement. Energy 172:423–434
[18] Gambelli AM and Rossi F (2019) Natural gas hydrates: Comparison between two different applications of thermal stimulation for performing CO2 replacement. Energy 172:423–434
[19] Gambelli AM, Castellani B, Nicolini A, Rossi F (2019a) Gas hydrate formation as a strategy for CH4/CO2 separation: experimental study on gaseous mixtures produced via Sabatier reaction. Journal of Natural Gas Science and Engineering 71:102985
[20] Gas Processors Suppliers Association (GPSA) (1977) Engineering Data Book, 9th ed., 3rd revision.
[21] Ghori, K.A.R., and Mohammed, R.A., (1996) The application of petroleum generation modeling to the eastern Sirte Basin, Libya, in Salem, M.J., El-Hawat, A.S., and Sbeta, A.M., eds., The geology of Sirte Basin: Amsterdam, Elsevier, v. II, p. 529–540.
[22] Hallett, D., and El Ghoul, A., (1996) Oil and gas potential of the deep trough areas in the Sirte Basin, Libya, in Salem, M.J., El-Hawat, A.S., and Sbeta, A.M., eds., The geology of Sirte Basin: Amsterdam, Elsevier, v. II, p. 455–484.
[23] Hossain M. B., (2016) Natural Gas Dehydration Process in Bangladesh. International Conference on Petroleum Engineering 2016, At Bangladesh University of Engineering & Technology (BUET) Dhaka-1000, Bangladesh.
[24] Ikoku, C. U. 1984. Natural Gas Production Engineering. New York: John Wiley& Sons.
[25] Katz, D.L., D. Cornell, R. Kobayashi, F.H. Poettmann, J.A. Vary, J.R. Ellenbaas, and C.F. Weinang. (1959) Handbook of Natural Gas Engineering. New York: McGraw-Hill.
[26] Kharirul, R.B.A., (2009) Gas Dehydration Process by Using Triethylene Glycol and Silica Gel. Faculty of Chemical & Natural Resources Engineering, University Malaysia Pahang.
[27] Klett, T.R., Ahlbrandt, T.S., Schmoker, J.W. and Dolton, G.L., (1997) Ranking of the world’s oil and gas provinces by known petroleum volumes: U.S. Geological Survey Open-File Report 97-463 CD-ROM.
[28] Kong, Z.Y., Ahmed, M., Liu, S., Sunarso, J., 2018a. Revamping existing glycol technologies in natural gas dehydration to improve the purity and absorption efficiency : available methods and recent developments. J. Nat. Gas Sci. Eng. 56, 486–503. https://doi.org/10.1016/j.jngse.2018.06.008.
[29] Koumentis I., (2022) Process Design and Simulation of Natural Gas Dehydration Process by Using Glycol Glycol. Master of Science in Energy. Professional School of
[30] Texas A&M University.
[31] Leecraft, J. (1987) Field Handling of Natural Gas, Austin, TX: Petroleum Extension Service.
[32] Maddox, R.N., L.L. Lilly, M. Moshfeghian, and E. Elizondo. (1988) Estimating water content of sour natural gas mixtures. Paper presetend at the Laurance Reid Gas Conditioning Conference, Norman, OK.
[33] Mansour, A.T., and Magairhy, I.A., (1996) Petroleum geology and stratigraphy of the southeastern part of the Sirte Basin, Libya, in Salem, M.J., El-Hawat, A.S., and Sbeta, A.M., eds., The geology of Sirte Basin: Amsterdam, Elsevier, v. II, p. 485–528.
[34] Mcketta, J.J. and A.H. Wehe. (1958) Use This Chart for Water Content of Natural Gases. Petroleum Refiner (August): 153–154.
[35] Mohd, H.B.S., (2009) Gas Dehydration Process by Using Glycol glycol solution in absorption and adsorption unit. Faculty of Chemical & Natural Resources Engineering, University Malaysia Pahang.
[36] Mohammad M. Ghiasi, Alireza Bahadori, Sohrab Zendehboudi (2014) Estimation of triethylene glycol (TEG) purity in natural gas dehydration units using fuzzy neural network. Journal of Natural Gas Science and Engineering, 17, P. 26-32.
[37] Mohamed, H. (2017) Natural Gas Dehydration Using Supersonic Separators with a Novel Design. Memorial University of Newfoundland.
[38] Mokhatab, S., W.A. Poe, and J. G. Spreight, K. (2006) Handbook of Natural Gas Transmission and Processing. Burlington, MA: Elsevier.
[39] Monnery, W.D. and W.Y. Svrcek. (1994) Successfully specify three-phase separators. Chem Eng Prog (September): 29.
[40] Monnery, W.D. and W.Y. Svrcek. (2000) Analytical Study of Liquid/Vapour Separation Efficiency. In the Alternative Flaring Technologies program sponsored by Environment Canada, CAPP, and PTAC.
[41] Muhammad Aimen Bin Isa (2011) Natural Gas Dehydration by Absorption Process: A comparative simulation study towards high effective natural gas dehydration using TEG technology. Universiti Teknologi PETRONAS, Bandar Seri Iskandar, Perak DarulRidzuan.
[42] Ning, Y., H. Zhang, and G. Zhou. (2000) Mathematical simulation and program for water content chart of natural gas. [In Chinese] Chem. Eng. Oil Gas 29: 75–77.
[43] Oil and Gas Transportation (OAG) (2014) Report to Congressional Requesters United States Government Accountability Office.
[44] Rojey, A., Jaffret, C., Cornot-Gandolph, S., Durand, B., Jullin, S., and Valais, M., (1997) “Natural Gas Production, Processing, Transport,” Editions Technip, Paris, France.
[45] Shu S, Tiwikrama AH, Yang C, Lee M (2019) Phase equilibrium and dynamic behavior of methane hydrates decomposition via depressurization in the presence of a promoter tert-butanol. J Taiwan Inst Chem Eng 95:119–130
[46] Speight, J.G., (2002) “Handbook of Petroleum Product Analysis,” Wiley, Hoboken, NJ.
[47] Speight, J.G. (2007) Natural Gas: A Basic Handbook. Houston: Gulf Publishing Company.
[48] Standing, M. B., and Katz, D. L., Density of natural gases, Trans. AIME142, 140–149 (1942).
[49] Sutton, R.P., (1985) Compressibility Factors for High-Molecular Weight Reservoir Gases, Paper SPE 14265, Presented at the 60th Annual Technical Conference and Exhibition of the society of Petroleum Engineering, Las Vegas, 22-25.
[50] Svrcek, W.Y. and W.D. Monnery. (1993) Design two-phase separators within the right limits. Chem Eng Prog (October): 53.
[51] Voleti Sai Manikanta Varma (2022) Natural Gas Dehydration Using TEG (Triethylene glycol). Journal of Emerging Technologies and Innovative Research (JETIR), Volume 9, Issue 6.
[52] Ward Rosen, (2014) Glycol Dehydration, Petroleum Learning Programs, 2nd edition
[53] Wichert, E., and Aziz, K., Calculate Z’s for sour gases, Hydrocarbon Proc. 51, 119–122 (May 1972).
[54] Wichert, G.C. and E. Wichert. (2003) New charts provide accurate estimations for water content of sour natural gas. Oil & Gas J (October 27): 64–66.
[55] Wines, T.H. and R.L. Brown, Jr. (1994) Recent development in liquid/gas separation technology. Paper presented at the Laurance Reid Gas Conditioning Conference, Norman, OK, February 28.
[56] Young, A.H. (2004) Natural Gas Processing Principles and Technology—Part II. University of Calgary.
[57] Zong Yang Konga, Xin Jie Melvin Weea, Ahmed Mahmouda, Aimin Yub, Shaomin Liuc, Jaka Sunarso (2020) Development of a techno-economic framework for natural gas dehydration via absorption using tri-ethylene glycol: A comparative study between DRIZO and other dehydration processes. South African Journal of Chemical Engineering, 31, P. 17–24.
