Experimental investigation on hydrate plugging in diesel oil+water+natural gas systems

doi:10.16085/j.issn.1000-6613.2016-2256

Chemical Industry and Engineering Progress ›› 2017, Vol. 36 ›› Issue (08): 2838-2846.DOI: 10.16085/j.issn.1000-6613.2016-2256

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Experimental investigation on hydrate plugging in diesel oil+water+natural gas systems

SONG Guangchun¹, LI Yuxing¹, WANG Wuchang¹, JIANG Kai¹, SHI Zhenzhuo¹, ZHAO Pengfei²

1. Shandong Key Laboratory of Oil-Gas Storage and Transportation Safety, China University of Petroleum, Qingdao 266580, Shandong, China;
2. SINOPEC Star Petroleum Co., Ltd., Beijing 100083, China

Received:2016-12-06 Revised:2016-12-26 Online:2017-08-05 Published:2017-08-05

柴油+水+天然气体系中水合物堵管实验研究

宋光春¹, 李玉星¹, 王武昌¹, 姜凯¹, 施政灼¹, 赵鹏飞²

1. 中国石油大学(华东)山东省油气储运安全省级重点实验室, 山东青岛 266580;
2. 中国石化集团新星石油有限责任公司, 北京 100083

通讯作者: 李玉星,教授,主要从事油气储运工程方面的研究和教学工作。
作者简介:宋光春(1992-),男,博士研究生,主要从事深水流动安全保障方向研究。E-mail:UpcNGH_sgc@163.com。
基金资助:
国家自然科学基金（51006120）、中央高校基本科研业务费专项（14CX02207A，17CX06017，17CX05006）及中国石油大学（华东）研究生创新工程（YCX2017062）项目。

Abstract

Abstract: In order to investigate hydrate plugging processes and mechanisms,a high pressure flow loop was newly designed and constructed where hydrate plugging experiments were performed in natural gas + diesel oil + water systems for a range of water cuts(30%-100%)and initial liquid flow rates(1600-2400kg/h). Based on the experimental data of hydrate morphology and flow parameters,hydrate formation and distribution characteristics in the flow loop were analyzed and two hydrate plugging types together with the corresponding hydrate plugging mechanisms were proposed. For hydrate plugging type Ⅰ,the plugging process can be divided into four stages. Formation and growing of a hydrate deposition layer is the governing plugging mechanism. For hydrate plugging type Ⅱ,it can also be divided into four stages. Liquid stratification and the sharp increase in viscosity is the governing plugging mechanism. In addition,silt-like hydrates and flocculent-like hydrate deposition layer were observed in hydrate plugging typeⅠwhile slurry-like hydrates with no obvious deposition layer were observed in hydrate plugging typeⅡ.

Key words: hydrate, plugging, process, mechanism, deposition, stratification

摘要： 采用新建的高压环道装置，以柴油、水、天然气为实验介质，在不同含水率（30%~100%）、液相初始流量（1600~2400kg/h）等条件下进行管道内水合物堵塞实验，研究水合物在管道中的堵塞过程和堵塞机理。根据实验过程中流动参数的变化规律和水合物形态的演化情况，分析了管道内水合物的形成和分布特点并得到了管道内水合物堵塞的两类过程及其对应的主导堵塞机理。对于第一类堵塞，其堵塞过程可分为4个阶段，水合物沉积层在管道内的形成和生长是其主导堵塞机理。对于第二类堵塞，其堵塞过程也可分为4个阶段，液相分层和流体黏度的急剧增加是其主导的堵塞机理。另外，在第一类堵塞实验中观察到了细泥沙状水合物和絮状水合物沉积层，而在第二类堵塞过程中水合物则呈浆状并且没有观察到明显的水合物沉积层。

关键词: 水合物, 堵塞, 过程, 机理, 沉积, 分层

CLC Number:

TE88

SONG Guangchun, LI Yuxing, WANG Wuchang, JIANG Kai, SHI Zhenzhuo, ZHAO Pengfei. Experimental investigation on hydrate plugging in diesel oil+water+natural gas systems[J]. Chemical Industry and Engineering Progress, 2017, 36(08): 2838-2846.

宋光春, 李玉星, 王武昌, 姜凯, 施政灼, 赵鹏飞. 柴油+水+天然气体系中水合物堵管实验研究[J]. 化工进展, 2017, 36(08): 2838-2846.

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Experimental investigation on hydrate plugging in diesel oil+water+natural gas systems

柴油+水+天然气体系中水合物堵管实验研究

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