scholarly journals Research on a Temperature Control Device for Seawater Hydraulic Systems Based on a Natural Gas Hydrate Core Sample Pressure-Retaining and Transfer Device

Energies ◽  
2019 ◽  
Vol 12 (20) ◽  
pp. 3990 ◽  
Author(s):  
Peihao Zhang ◽  
Jiawang Chen ◽  
Qiaoling Gao ◽  
Bo Xiao ◽  
Xueqiao Geng ◽  
...  
Keyword(s):  
Natural Gas ◽  
Temperature Control ◽  
Gas Hydrate ◽  
Core Sample ◽  
Control Device ◽  
Water Tank ◽  
Natural Gas Hydrate ◽  
In Situ Conditions ◽  
Temperature Control Device ◽  
Transfer Device

In the study of natural gas hydrates, the maintenance of the low-temperature and high-pressure state of the core sample under in situ conditions is highly important for cutting, transferring, and subsequent analysis. The pressure maintenance and temperature control device (PMTCD) for natural gas hydrate core samples described in this paper is a subsystem of the pressure-retaining and transfer device. The device consists of a water tank, seawater chillers, a plunger pump and a thermoelectrical refrigeration device. The device cools the seawater to 2 °C, and then pressurizes it to inject it into the sample cylinder. Due to the inevitable heat generated by the pressurization and heat exchange with environment, there is a thermoelectrical refrigeration device to compensate for temperature rise. Finally, the seawater temperature entering the sample cylinder is no higher than 3 °C, effectively preventing the decomposition and deterioration of the natural gas hydrate core in the sample cylinder. In this paper, the temperature increase of the device and its compensation capacity are analyzed in detail on the basis of calculation and simulation. On the basis of testing with the device, it is verified that even at the ambient temperature, the water temperature can still be maintained at 3 °C.

scholarly journals Research on pressure‐stabilizing system for transfer device for natural gas hydrate cores

2020 ◽  
Vol 8 (4) ◽  
pp. 973-985
Author(s):  
Qiaoling Gao ◽  
Jiawang Chen ◽  
Junbo Liu ◽  
Linyi Gu ◽  
Fanglan Liu ◽  
...  
Keyword(s):  
Natural Gas ◽  
Gas Hydrate ◽  
Natural Gas Hydrate ◽  
Transfer Device

Business Model of Natural Gas Hydrate Sample Management Based on Workflow and its Realization

2013 ◽  
Vol 278-280 ◽  
pp. 2123-2127
Author(s):  
Bin Feng ◽  
Wen Huan Zhan ◽  
Jie Sun
Keyword(s):  
Natural Gas ◽  
Business Model ◽  
Gas Hydrate ◽  
Core Sample ◽  
Management Model ◽  
Analytic Model ◽  
Natural Gas Hydrate ◽  
The Core ◽  
Sample Management ◽  
Hydrate Sample

By introducing workflow methods to the research on natural gas hydrate core sample management, we have built the management model and designed the core object analytic model. With the help of models above, the underlying information of core sample exposes to the researchers visually and simply. Based on models and WEBGIS, a natural gas hydrate sample management system has been established and successfully applied by Guangzhou Marine Geological Survey.

Preparation and characterization of intelligent temperature-control microcapsules for natural gas hydrate bearing sediment

2021 ◽  
pp. 117436
Author(s):  
Yubin Zhang ◽  
Zhengsong Qiu ◽  
Xin Zhao ◽  
Jiaxing Mu ◽  
Yongle Ma ◽  
...  
Keyword(s):  
Natural Gas ◽  
Temperature Control ◽  
Gas Hydrate ◽  
Natural Gas Hydrate

scholarly journals Evaluation and re-understanding of the global natural gas hydrate resources

2021 ◽  
Vol 18 (2) ◽  
pp. 323-338
Author(s):  
Xiong-Qi Pang ◽  
Zhuo-Heng Chen ◽  
Cheng-Zao Jia ◽  
En-Ze Wang ◽  
He-Sheng Shi ◽  
...  
Keyword(s):  
Natural Gas ◽  
Gas Hydrate ◽  
Oil And Gas ◽  
Material Balance ◽  
Energy Resource ◽  
Resource Assessment ◽  
Future Trend ◽  
Natural Gas Hydrate ◽  
The Future ◽  
Recoverable Resources

AbstractNatural gas hydrate (NGH) has been widely considered as an alternative to conventional oil and gas resources in the future energy resource supply since Trofimuk’s first resource assessment in 1973. At least 29 global estimates have been published from various studies so far, among which 24 estimates are greater than the total conventional gas resources. If drawn in chronological order, the 29 historical resource estimates show a clear downward trend, reflecting the changes in our perception with respect to its resource potential with increasing our knowledge on the NGH with time. A time series of the 29 estimates was used to establish a statistical model for predict the future trend. The model produces an expected resource value of 41.46 × 1012 m3 at the year of 2050. The statistical trend projected future gas hydrate resource is only about 10% of total natural gas resource in conventional reservoir, consistent with estimates of global technically recoverable resources (TRR) in gas hydrate from Monte Carlo technique based on volumetric and material balance approaches. Considering the technical challenges and high cost in commercial production and the lack of competitive advantages compared with rapid growing unconventional and renewable resources, only those on the very top of the gas hydrate resource pyramid will be added to future energy supply. It is unlikely that the NGH will be the major energy source in the future.

scholarly journals pH Effect of Natural Gas Hydrate on X80 Steel Solid—Liquid Phase Scouring Corrosion

ACS Omega ◽  
2021 ◽  
Vol 6 (4) ◽  
pp. 3017-3023
Author(s):  
Song Deng ◽  
Dingkun Ling ◽  
Binbin Zhou ◽  
Yu Gong ◽  
Xin Shen ◽  
...  
Keyword(s):  
Liquid Phase ◽  
Natural Gas ◽  
Gas Hydrate ◽  
Ph Effect ◽  
Natural Gas Hydrate ◽  
X80 Steel ◽  
Solid Liquid

Review of natural gas hydrate dissociation effects on seabed stability

2021 ◽  
Author(s):  
Min Zhang ◽  
Ming Niu ◽  
Shiwei Shen ◽  
Shulin Dai ◽  
Yan Xu
Keyword(s):  
Natural Gas ◽  
Gas Hydrate ◽  
Natural Gas Hydrate ◽  
Hydrate Dissociation
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