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Yijiao Guo, Luchen Zhang, Lei Yu, Shaoze Luo, Chuang Liu and Yuan Liu
To account for changes in the performance of spillway aerator structures of high-altitude dams, depressurization generalized model experiments and theoretical analyses were conducted in this study. Measurements were taken for ventilation hole air velocit...
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Yue Qiu, Xiangfu Wang, Zhaofeng Wang, Wei Liang and Tongbin Zhao
In order to study the influence of damage on the gas production of natural gas hydrate, a multi-physical field theoretical model considering damage effect and coupling thermal-hydraulic-mechanical-chemical (THMC) was established by theoretical analysis a...
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Jingsheng Lu, Guangrong Jin, Dongliang Li, Deqing Liang, Yong He, Lingli Shi, Yiqun Zhang and Youming Xiong
Gas from natural gas hydrate (NGH) is priced competitively with gas prices. Most marine NGH is stored in low cementing strata, which easily cause sand production problems, restricting the commercial production and environmental safety of NGH?s developmen...
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Xuyang Guo, Yan Jin, Jingyu Zi, Jiaying Lin, Bolong Zhu, Qian Wen and Qi Jing
Sand production has been identified as a key reason limiting sustained and commercial gas production in methane-hydrate-bearing sediments. Production tests in Canada and Japan were terminated partially because of excessive sand production in pilot wells....
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Hongyu Ye, Xuezhen Wu, Gaoqiang Guo, Dayong Li and Yujing Jiang
Natural gas hydrate (NGH) dissociation is a heat-absorbing process, and the cooling around the wellhead is more pronounced during depressurization production. Low temperature will cause NGH regeneration or ice formation, blocking gas flow paths and reduc...
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Yaobin Li, Xin Xin, Tianfu Xu, Huixing Zhu, Haibin Wang, Qiang Chen and Bo Yang
Gas hydrates are likely to become an important strategic resource with commercial development prospects. It is therefore of great significance to realize the long-term and efficient production of methane hydrate reservoirs. Previous studies have shown th...
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Xiaoling Zhang, Fei Xia, Chengshun Xu and Yan Han
The stability of hydrate-bearing near-wellbore reservoirs is one of the key issues in gas hydrate exploitation. In most previous investigations, the damage evolution process of the sediment structure and its effect on near-wellbore reservoir stability ha...
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Chen Chen, Lin Yang, Rui Jia, Youhong Sun, Wei Guo, Yong Chen and Xitong Li
Natural gas hydrate (NGH) concentrations hold large reserves of relatively pure unconventional natural gases, consisting mainly of methane. Depressurization is emerging as the optimum conversion technology for converting NGH in its reservoir to its const...
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Machiko Tamaki, Tetsuya Fujii and Kiyofumi Suzuki
Following the world?s first offshore production test that was conducted from a gas hydrate reservoir by a depressurization technique in 2013, the second offshore production test has been planned in the eastern Nankai Trough. In 2016, the drilling survey ...
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J. Moreno, N. de Hart, M. Saakes, K. Nijmeijer
Pág. 23 - 31
When natural feed waters are used in the operation of a reverse electrodialysis (RED) stack, severe fouling on the ion exchange membranes and spacers occurs. Fouling of the RED stack has a strong influence on the gross power density output; which can dec...
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