Distribution and characteristics of mud diapirs, gas chimneys, and bottom simulating reflectors associated with hydrocarbon migration and gas hydrate accumulation in the Qiongdongnan Basin , northern slope of the South China Sea

2018 ◽  
Vol 54 (6) ◽  
pp. 3556-3573 ◽  
Author(s):  
Wei Zhang ◽  
Jinqiang Liang ◽  
Pibo Su ◽  
Jiangong Wei ◽  
Yuehua Gong ◽  
...  
Keyword(s):  
South China Sea ◽  
South China ◽  
Gas Hydrate ◽  
The South China Sea ◽  
Qiongdongnan Basin ◽  
Northern Slope ◽  
Hydrocarbon Migration ◽  
China Sea ◽  
Bottom Simulating Reflectors ◽  
Gas Chimneys

scholarly journals Focused Fluid Flow, Shallow Gas Hydrate, and Cold Seep in the Qiongdongnan Basin, Northwestern South China Sea

Geofluids ◽  
2021 ◽  
Vol 2021 ◽  
pp. 1-11
Author(s):  
Minghui Geng ◽  
Ruwei Zhang ◽  
Shengxiong Yang ◽  
Jun Guo ◽  
Zongheng Chen
Keyword(s):  
Fluid Flow ◽  
South China Sea ◽  
South China ◽  
Gas Hydrate ◽  
Qiongdongnan Basin ◽  
Cold Seep ◽  
Shallow Gas ◽  
Free Gas ◽  
China Sea ◽  
Gas Chimneys

The 3D seismic data acquired in the central Qiongdongnan Basin, northwestern South China Sea, reveal the presence of shallow gas hydrate, free gas, and focused fluid flow in the study area, which are indicated by multiple seismic anomalies, including bottom simulating reflectors, polarity reverses, pulldowns, minor faults, and gas chimneys intensively emplaced within the shallow strata. A new cold seep is also discovered at approximately 1520 m water depths with an ~40 m wide crater in the west part of the study area. Water column imaging, seafloor observation, and sampling using the remotely operated vehicle “Haima” demonstrate ongoing gas seepages and shallow gas hydrates at this site. Thermogenic gas in the study area migrates from the deep reservoir through the gas hydrate stability zone along deep faults and gas chimneys, forms shallow gas hydrate and free gas, and sustains localized gas seepage within this cold seep. The results provide insight into the relationship between shallow gas hydrate accumulation and deep hydrocarbon generation and migration and simultaneously have important implications for hydrocarbon explorations in the Qiongdongnan Basin, northwestern South China Sea.

Controlling factors for gas hydrate occurrence in Shenhu area on the northern slope of the South China Sea

2013 ◽  
Vol 56 (4) ◽  
pp. 513-520 ◽  
Author(s):  
HongBin Wang ◽  
ShengXiong Yang ◽  
NengYou Wu ◽  
GuangXue Zhang ◽  
JinQiang Liang ◽  
...  
Keyword(s):  
South China Sea ◽  
South China ◽  
Gas Hydrate ◽  
Controlling Factors ◽  
The South China Sea ◽  
Northern Slope ◽  
The South ◽  
Shenhu Area ◽  
China Sea
Sign in / Sign up

Export Citation Format

Share Document