TBAB hydrate formation and growth in a microdevice under static and dynamic conditions  

作　　者：Xingxun Li Ming Liu Qingping Li Weixin Pang Guangjin Chen Changyu Sun 

机构地区：[1]State Key Laboratory of Heavy Oil Processing,China University of Petroleum Beijing,Beijing,102249,China [2]State Key Laboratory of Natural Gas Hydrate,CNOOC Research Institute Co.,Ltd.,Beijing,100027,China

出　　处：《Petroleum Science》2024年第2期1396-1404,共9页石油科学（英文版）

基　　金：supported by the National Natural Science Foundation of China(21808238,U19B2005,U20B6005,22127812);the National Key Research and Development Program of China(2021YFC2800902)。

摘　　要：The natural gas hydrate has become one of the most promising future green energy sources on the earth.The natural gas hydrates mostly exist in the sediments with porous structure, so a solid understanding of the hydrate formation and growth processes in the porous medium is of significance for the exploitation of natural gas hydrate. The micro-packed bed device is one of the efficient microfluidic devices in the engineering field, but it has been rarely used for the hydrate-based research. In this study, a transparent micro-packed bed device filled with glass beads was developed to mimic the porous condition of sediments, and used to in-situ visualize the hydrate formation and growth habits in the pore spaces under both static and dynamic conditions. For the static experiment, two types of hydrate growth patterns in porous medium were observed and identified in the micro-packed bed device, which were the graincoating growth and pore-filling growth. For the dynamic condition, the hydrate formation, growth,distribution habits and hydrate blockage phenomena in the pore spaces were in-situ visually captured.The impacts of flowrate and subcooling on the pressure variation of the micro-packed bed and the duration of the hydrate growth under dynamic flow condition in pores were in-situ monitored and analyzed. The higher flowrate could result in the faster hydrate growth and more severe blockage in pores, but the effect of subcooling condition might be less significant at the high flowrate.

关 键 词：Hydrate formation Hydrate growth MICRODEVICE In-situ measurement 

分 类 号：TE37[石油与天然气工程—油气田开发工程]