RESEARCH ARTICLE


Research on Critical Effusion Volume for the China-Burma Natural Gas Pipeline



Xiyao Liu1, Changjun Li1, *, Yang Peng1, Yanjie Jia2, Chunqing Li2
1 School of Petroleum and Natural Gas Engineering, Southwest Petroleum University, Chengdu, China
2 CNPC Southwest Pipeline Co. Ltd., Chengdu, China


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Creative Commons License
© Liu et al. ; Licensee Bentham Open

open-access license: This is an open access article licensed under the terms of the Creative Commons Attribution-Non-Commercial 4.0 International Public License (CC BY-NC 4.0) (https://creativecommons.org/licenses/by-nc/4.0/legalcode), which permits unrestricted, non-commercial use, distribution and reproduction in any medium, provided the work is properly cited.

* Address correspondence to this author at the School of Petroleum and Natural Gas Engineering, Southwest Petroleum University, Chengdu, China; E-mail: 350378817@qq.com


Abstract

Under certain temperature and pressure conditions, natural gas condensates and the liquid is accumulated in the pipeline during transmission of gas. It is therefore important to calculate the critical effusion volume accurately so that a reasonable pigging cycle can be determined. Frequent pigging operation not only affects the normal gas supply, but also causes unpiggable obstacles. This study has developed a liquid prediction model in which the effusion volume is dependent on the liquid holdup and the capacity of the gas to carry liquid. Using the analysis software OLGA and applying the model to the China-Burma pipeline, the critical effusion volume and the parameters distribution curves along the pipeline have been determined. The results show that the critical effusion volume in the pipeline decreases with increasing throughput. The method is a significant advancement in determining the pigging cycle and mitigating the pigging risk.

Keywords: Accumulated liquid, Critical effusion volume, Natural gas condensate, OLGA, Pipeline, Throughput.