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.

Carbonate dissolution and deep-water paleoceanography of the South China Sea since the Middle Pleistocene

2001 ◽  
Vol 46 (22) ◽  
pp. 1908-1911 ◽  
Author(s):  
Baohua Li ◽  
Quanhong Zhao ◽  
Min-Pen Chen ◽  
Zhinmin Jian ◽  
Pinxian Wang
Keyword(s):  
South China Sea ◽  
South China ◽  
Deep Water ◽  
The South China Sea ◽  
Middle Pleistocene ◽  
Carbonate Dissolution ◽  
The South ◽  
China Sea

scholarly journals Changes in Deep Water Oxygenation of the South China Sea Since the Last Glacial Period

2018 ◽  
Vol 45 (17) ◽  
pp. 9058-9066 ◽  
Author(s):  
Gang Li ◽  
Harunur Rashid ◽  
Lifeng Zhong ◽  
Xing Xu ◽  
Wen Yan ◽  
...  
Keyword(s):  
South China Sea ◽  
South China ◽  
Deep Water ◽  
The South China Sea ◽  
Glacial Period ◽  
The South ◽  
Last Glacial Period ◽  
China Sea ◽  
Last Glacial ◽  
The Last Glacial

China-Philippines joint energy plans may soon go ahead

2018 ◽  
Keyword(s):  
South China Sea ◽  
South China ◽  
Energy Security ◽  
Revenue Sharing ◽  
The Philippines ◽  
The South China Sea ◽  
The South ◽  
Gas Field ◽  
Content Type ◽  
China Sea

Subject The possibility of joint China-Philippines exploitation of hydrocarbons in disputed waters in the South China Sea. Significance Recent months have seen a succession of signs of a possible breakthrough in China-Philippines offshore energy cooperation. The Philippine foreign secretary has suggested the two countries may shortly reach an agreement to exploit hydrocarbon resources in a disputed area of the South China Sea. The deal would involve a 60:40 revenue-sharing arrangement in favour of the Philippines. Impacts Many Philippine politicians will support the deal because the country needs a replacement for the rapidly depleting Malampaya gas field. Even a carefully drafted arrangement may still face constitutional challenges within the Philippines. Both countries would benefit from greater energy security.

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