Analysis of physical properties of gas hydrate-bearing unconsolidated sediment samples from the ultra-deepwater area in the South China Sea

2021 ◽  
Author(s):  
Xin Lyu ◽  
Qingping Li ◽  
Yang Ge ◽  
Min Ouyang ◽  
Hexing Liu ◽  
...  
Keyword(s):  
South China Sea ◽  
Physical Properties ◽  
South China ◽  
Gas Hydrate ◽  
The South China Sea ◽  
The South ◽  
Sediment Samples ◽  
Deepwater Area ◽  
China Sea ◽  
Unconsolidated Sediment

scholarly journals Physical Properties of Gas Hydrate-Bearing Pressure Core Sediments in the South China Sea

Geofluids ◽  
2021 ◽  
Vol 2021 ◽  
pp. 1-10
Author(s):  
Jiangong Wei ◽  
Tingting Wu ◽  
Xiuli Feng ◽  
Jinqiang Liang ◽  
Wenjing Li ◽  
...  
Keyword(s):  
South China Sea ◽  
Physical Properties ◽  
Mechanical Behavior ◽  
South China ◽  
Gas Hydrates ◽  
Gas Hydrate ◽  
The South China Sea ◽  
The South ◽  
China Sea ◽  
Hydrate Bearing Sediments

Gas hydrates are a potential future energy resource and are widely distributed in marine sediments and permafrost areas. The physical properties and mechanical behavior of gas hydrate-bearing sediments are of great significance to seafloor stability and platform safety. In 2013, a large number of pressure cores were recovered during China’s second gas hydrate drilling expedition in the South China Sea. In this study, we determined the gas hydrate distribution, saturation, physical properties, and mechanical behavior of the gas hydrate-bearing sediments by conducting Multi-Sensor Core Logger measurements and triaxial and permeability tests. Disseminated gas hydrates, gas hydrate veins, and gas hydrate slabs were observed in the sediments. The gas hydrate distribution and saturation are spatially heterogeneous, with gas hydrate saturations of 0%–55.3%. The peak deviatoric stress of the gas hydrate-bearing sediments is 0.14–1.62 MPa under a 0.15–2.3 MPa effective confining stress. The permeability is 0.006– 0.095 × 10 − 3   μ m 2 , and it decreases with increasing gas hydrate saturation and burial depth.

scholarly journals Geomechanical properties of gas hydrate-bearing sediments in Shenhu Area of the South China Sea

2021 ◽  
Author(s):  
Jiangong Wei ◽  
Lin Yang ◽  
Qianyong Liang ◽  
Jinqiang Liang ◽  
Jingan Lu ◽  
...  
Keyword(s):  
South China Sea ◽  
South China ◽  
Gas Hydrate ◽  
The South China Sea ◽  
The South ◽  
Shenhu Area ◽  
Geomechanical Properties ◽  
China Sea ◽  
Hydrate Bearing Sediments

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

scholarly journals Evaluation of natural gas hydrate resources in the South China Sea using a new genetic analogy method

2021 ◽  
Author(s):  
Liu Xiaohan ◽  
Hu Tao ◽  
Pang Xiongqi ◽  
Xu Zhi ◽  
Wang Tong ◽  
...  
Keyword(s):  
Natural Gas ◽  
South China Sea ◽  
South China ◽  
Gas Hydrate ◽  
The South China Sea ◽  
Natural Gas Hydrate ◽  
The South ◽  
Analogy Method ◽  
China Sea
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