Calculation of hydrate formation probability in wet-gas pipelines

被引：0

作者：

Deng, Daoming ^{[1
]}

Tu, Duoyun ^{[2
]}

Dong, Yong ^{[2
]}

Geng, Lin ^{[1
]}

Gong, Jing ^{[1
]}

机构：

[1] NELPS and Beijing Key Laboratory of Urban Oil and Gas Distribution Technology, China University of Petroleum

[2] Southwest Branch of China National Petroleum Group Engineering Co. Ltd., Chengdu 610041, Sichuan

来源：

Huagong Xuebao/CIESC Journal | 2014年 / 65卷 / 06期

关键词：

Flow safety; Formation probability; Hydrate; Phase equilibria; Pipelines; Two-phase flow; Wet gas;

D O I：

10.3969/j.issn.0438-1157.2014.06.043

中图分类号：

学科分类号：

摘要：

Formation of hydrate in wet-gas pipelines could bring potential safety hazard. Flow safety evaluation of wet-gas pipelines is of importance for guaranteeing production safety and minimizing losses. The first step of this evaluation is to calculate the probability of hydrate formation(HFP) in wet-gas pipeline. In this work, based on the reliability limit state method and the calculation of the hydraulics and thermodynamics for wet-gas pipeline, and using the water content in sour natural gas predicted by higher precision Har-PR and the conditions of hydrate formation estimated by Chen-Guo model, a probability limit state equation is established from the difference of temperature of hydrate formation and actual flow in the pipeline, and the probability of hydrate formation(FHP) in pipelines is calculated by combined probability method. The entrance data in the experimental hydrate flow loop is analyzed, and the results show that there is the Gaussian distribution for inlet pressure and temperature and the largest extreme value distribution for the inlet flow rate. A case calculation demonstrates that: (1)all mean values and standard deviations of random variables affect HFP in wet gas pipelines; (2)the sensibility of the HFP is different for different random process variables; (3)the probability of hydrate formation in entire pipeline is affected by both the sample numbers for single and combined random variables. © All Rights Reserved.

引用

页码：2270 / 2275

页数：5

共 13 条

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