Study on Pigging Process Analyses and Control Methods for Moisture Gathering Lines: Study in Puguang Gas Field, China
Publication: Journal of Pipeline Systems Engineering and Practice
Volume 12, Issue 3
Abstract
The moisture gathering line of the Puguang Gas Field in China renders it prone to accumulating liquid at certain points due to topographic differences. Under operational conditions of pigging, liquid slug volumes, end drainage rates, and production separator surge volumes increase. Multiphase flow transient simulation software is used to study the P102 gas gathering station pigging process. The purging gas volume was measured to be and the purging duration to be . The pigging liquid slug has been effectively controlled. When the spherical pig pushing volume reaches , the terminal liquid slug flow peak has been declined from 2,264 to , and the separator surge volume has been decreased from 49 to . When a proportion integration differentiation (PID) controller is used rather than applying manual control, the emergent drainage time is reduced from 12 to . The bypass pigging system has been designed and improved, and the peak of terminal liquid slug flow has been reduced from 1,375 to . The optimal bypass rate ranges from 6% to 8% to guide onsite pigging operations of the moisture gathering line of the Puguang Gas Field.
Get full access to this article
View all available purchase options and get full access to this article.
Data Availability Statement
Some or all data, models, or code that support the findings of this study are available from the corresponding author upon reasonable request.
Acknowledgments
This work has been supported by the China National Science and Technology Major Project: Safe and Efficient Operation Technology of High Sulfur Gas Field Gathering and Transportation Purification System (No. 2016ZX05017) and by the China Sichuan Science and Technology Program Project: Research and Application of Landslide Geological Disaster Monitoring and Early Warning Technology in Complex Mountain Pipeline (No. 2019YFS0075).
References
Cen, K., X. Jiang, Y. X. Zhu, J. Yang, and L. F. Zan. 2014. “Transient flow characteristics of the pigging process of high sulfur gas-liquid mixed transmission pipelines and its significance to an optimal design of pipelines.” Nat. Gas Indus. 34 (5): 131–136. https://doi.org/10.3787/j.issn.1000-0976.2014.05.019.
Li, T., Y. Zong, and D. W. Zhu. 2016. “Dynamic analysis of pigging operation in wet gas pipeline by OLGA.” Oil Gas Storage Transp. 35 (5): 526–529. https://doi.org/10.6047/j.issn.1000-8241.2016.05.015.
Luo, X. M. 2007. Investigation on hydrodynamic characteristics of gas-liquid two-phase and oil-gas-water three-phase slug flow. Beijing: China Univ. of Petroleum.
Mehdi, D., H. Yashar, and M. Seied Ali Akbar. 2014. “Field experience and evaluation of the South Pars sea line pigging, based on dynamic simulations.” J. Nat. Gas Sci. Eng. 18 (May): 210–218. https://doi.org/10.1016/j.jngse.2014.02.013.
Ou, L., S. J. Li, and G. F. Su. 2010. “Internal corrosion control and monitoring of Puguang gas gathering system.” Eng. Sci. 12 (10): 70–75. https://doi.org/10.3969/j.issn.1009-1742.2010.10.013.
Saad, M. R., and B. Singh. 1988. “Handling of liquid holdup in duyong two-phase flow pipeline system.” In Proc., Offshore South East Asia Show. Richardson, TX: Society of Petroleum Engineers.
Su, H. P., S. L. Li, C. Li, and S. H. Zhang. 2016. “Application of bypass pig in moisture transmission line.” Oil Gas Field Surf. Eng. 35 (1): 55–57. https://doi.org/10.3969/j.issn.1006-6896.2016.1.017.
Van Spronsen, G., A. Entaban, K. Mohamad Amin, S. Sarkar, and R. A. W. M. Henkes. 2013. “Field experience with by-pass pigging to mitigate liquid surge.” In Proc., 16th Int. Conf. on Multiphase Production Technology. Cannes, France: British Hydromechanics Research Group.
Vergara, M. A., and N. Foucart. 2007. “Selection slug catcher type.” In Proc., Latin American & Caribbean Petroleum Engineering Conf. Richardson, TX: Society of Petroleum Engineers.
Information & Authors
Information
Published In
Copyright
© 2021 American Society of Civil Engineers.
History
Received: Jul 20, 2020
Accepted: Dec 1, 2020
Published online: Mar 23, 2021
Published in print: Aug 1, 2021
Discussion open until: Aug 23, 2021
Authors
Metrics & Citations
Metrics
Citations
Download citation
If you have the appropriate software installed, you can download article citation data to the citation manager of your choice. Simply select your manager software from the list below and click Download.