Risk Assessment and Countermeasure on Drilling and Production Process of Deep Water Gas Hydrate in the South China Sea

2021 ◽  
Author(s):  
yuan zhu ◽  
Kang Liu ◽  
Guoming Chen
Keyword(s):  
Risk Assessment ◽  
South China Sea ◽  
Production Process ◽  
South China ◽  
Deep Water ◽  
Gas Hydrate ◽  
The South China Sea ◽  
The South ◽  
China Sea ◽  
Water Gas

scholarly journals Gas Hydrate Formation Risk and Prevention for the Development Wells in the Lingshui Gas Field in South China Sea

Geofluids ◽  
2021 ◽  
Vol 2021 ◽  
pp. 1-13
Author(s):  
Donglei Jiang ◽  
Yi Yu ◽  
Yi Huang ◽  
Wenbo Meng ◽  
Jianbo Su ◽  
...  
Keyword(s):  
South China Sea ◽  
South China ◽  
Deep Water ◽  
Hydrate Formation ◽  
The South China Sea ◽  
The South ◽  
Gas Field ◽  
Gas Well ◽  
China Sea ◽  
Water Gas

Hydrate formation risk is an important challenge in the development of deep-water gas field. Considering the characteristics of the Lingshui (LS) gas field in the South China Sea and the difference of well structures, a model for calculating wellbore temperature and pressure in deep-water gas production well is proposed and verified by the field data. Combining the hydrate equilibrium models with varied gas components, the prediction method of hydrate formation region in deep-water gas well in the South China Sea is obtained. The hydrate formation regions under different operating conditions for a deep-water gas well in the South China Sea were given by the proposed model. The results show that no hydrate formation risk exists in the production operation, but the risk exists in the shut-in and testing operations. Meanwhile, the determination of the hydrate inhibitor injection parameters during the testing operation is studied, and the influence of the inhibitors’ injection concentration and pressure on preventing gas hydrates is analyzed. This work provides useful advice for the prediction and prevention of hydrate formation risk in the development of deep-water gas fields, especially in the South China Sea.

scholarly journals Discovery of Deep-Water Bamboo Coral Forest in the South China Sea

2019 ◽  
Vol 9 (1) ◽  
Author(s):  
Jianru Li ◽  
Pinxian Wang
Keyword(s):  
South China Sea ◽  
South China ◽  
Deep Water ◽  
Cold Water ◽  
The South China Sea ◽  
The South ◽  
China Sea ◽  
Paracel Islands ◽  
New Frontier ◽  
Sea Fan

Abstract A deep-water coral forest, characterized by slender and whip-shaped bamboo corals has been discovered from water depths of 1200–1380 m at the western edge of the Xisha (Paracel Islands) area in the South China Sea. The bamboo corals are often accompanied by cold-water gorgonian “sea fan” corals: Anthogorgia sp. and Calyptrophora sp., as well as assemblages of sponges, cirrate octopuses, crinoids and other animals. The coral density increased toward the shallower areas from 24.8 to 220 colonies per 100 m2 from 1380 m to 1200 m water depth. This is the first set of observations of deep-water bamboo coral forests in Southeast Asia, opening a new frontier for systematic, ecological and conservation studies to understand the deep-coral ecosystem in the region.

scholarly journals Reservoir stability in the process of natural gas hydrate production by depressurization in the shenhu area of the south China sea

2018 ◽  
Vol 5 (6) ◽  
pp. 631-643 ◽  
Author(s):  
Yizhao Wan ◽  
Nengyou Wu ◽  
Gaowei Hu ◽  
Xin Xin ◽  
Guangrong Jin ◽  
...  
Keyword(s):  
Natural Gas ◽  
South China Sea ◽  
South China ◽  
Gas Hydrate ◽  
The South China Sea ◽  
Natural Gas Hydrate ◽  
The South ◽  
Shenhu Area ◽  
China Sea
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