Geoacoustic inversion for bottom parameters in the deep-water area of the South China Sea

2018 ◽  
Vol 144 (3) ◽  
pp. 1736-1736 ◽  
Author(s):  
Shuanglin Wu ◽  
Zhenglin Li ◽  
Jixing Qin
Keyword(s):  
South China Sea ◽  
South China ◽  
Deep Water ◽  
Water Area ◽  
The South China Sea ◽  
The South ◽  
Geoacoustic Inversion ◽  
China Sea ◽  
Deep Water Area

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.

Trans-dimensional range-dependent geoacoustic inversion using modal dispersion data in the South China Sea

2019 ◽  
Vol 146 (4) ◽  
pp. 2929-2929
Author(s):  
Jin-Bao Weng ◽  
Stan E. Dosso ◽  
N. Ross Chapman ◽  
Yan-ming Yang ◽  
ZhaoHui Peng ◽  
...  
Keyword(s):  
South China Sea ◽  
South China ◽  
The South China Sea ◽  
The South ◽  
Geoacoustic Inversion ◽  
Modal Dispersion ◽  
China Sea ◽  
Dispersion Data ◽  
Dimensional Range

The tectonic differences between the east and the west in the deep-water area of the northern South China Sea

2016 ◽  
Vol 35 (1) ◽  
pp. 86-95 ◽  
Author(s):  
Zhongyu Xia ◽  
Zhifeng Wan ◽  
Xianqing Wang ◽  
Qiuhua Shi ◽  
Song Cai ◽  
...  
Keyword(s):  
South China Sea ◽  
South China ◽  
Deep Water ◽  
Northern South China Sea ◽  
Water Area ◽  
The West ◽  
China Sea ◽  
Deep Water Area

Comprehensive identification of CO2 nonhydrocarbon gas layers by relative CO2 content and apparent porosity calculated from well logs: A case study in the Baiyun deep-water area in the eastern South China Sea

2020 ◽  
Vol 8 (4) ◽  
pp. T715-T725
Author(s):  
Jin Feng ◽  
Bin Zhao ◽  
Chuqiao Gao ◽  
Lei Shi ◽  
Yao Guan ◽  
...  
Keyword(s):  
South China Sea ◽  
South China ◽  
Deep Water ◽  
Water Area ◽  
Relative Content ◽  
Apparent Porosity ◽  
China Sea ◽  
Identification Chart ◽  
Hydrocarbon Gas ◽  
Deep Water Area

The accurate identification of [Formula: see text] nonhydrocarbon gas layers plays an important role in the exploration and development of natural gas reservoirs. The logging response characteristics of layers containing nonhydrocarbon gas and hydrocarbon gas are very similar because there are gas fluids in both kinds of layers, which leads to the uncertainty in the interpretation results of gas types. We have developed a comprehensive method for the identification of [Formula: see text] nonhydrocarbon gas layers by using [Formula: see text]-relative content and apparent porosity. First, based on the formation component bulk volume model of the coexisting reservoir of the [Formula: see text] nonhydrocarbon gas layers and the hydrocarbon gas layers, we develop an optimization algorithm to quantitatively calculate the [Formula: see text] relative content in the reservoir. Second, by analyzing and determining the logging response value of the [Formula: see text] nonhydrocarbon gas under the formation temperature and pressure conditions, we establish a qualitative identification chart using the difference between the calculated value of the apparent porosity of [Formula: see text] and the hydrocarbon gas. Finally, we were able to accurately identify the [Formula: see text] nonhydrocarbon gas layers by comprehensively analyzing the calculation results of the [Formula: see text] relative content in the reservoir and the identification results of the [Formula: see text] apparent porosity identification chart. We apply the above workflow in the Baiyun deep-water area in the eastern South China Sea, and it shows high efficiency in the identification of [Formula: see text] nonhydrocarbon gas layers.

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
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