Evaluation of Source Rock in Xihu Sag in the East China Sea

2014 ◽  
Vol 1065-1069 ◽  
pp. 279-282
Author(s):  
Chun Gang Song ◽  
Shu Juan Wang ◽  
Wei Jie Zheng ◽  
Qiang Cao
Keyword(s):  
Organic Matter ◽  
East China Sea ◽  
Source Rock ◽  
Oil And Gas ◽  
Mature Stage ◽  
The East China Sea ◽  
Oil And Gas Exploration ◽  
Lower Member ◽  
Organic Matter Abundance ◽  
Hydrocarbon Generating Potential

Xihu Sag is the largest petroliferous sag in China offshore area, which is also the main oil and gas exploration battlefield in the East China Sea shelf basin. Source rock is the main material basis for oil and gas generation, its study has important significance on oil and gas exploration in Xihu Sag. By taking source rock of the Eocene Pinghu Formation and Oligocene Huagang Formation of Pingbei area in Xihu Sag as the research object, static characteristics of source rock in Pingbei Area are evaluated and analyzed in the following three aspects: organic matter abundance, types and maturity. The results show that, based on the organic matter abundance, lower member of Pinghu Formation has a high organic matter abundance, mainly gas, while lower member of Huagang Formation is mainly medium-better source rock, with a common hydrocarbon generating potential. Based on the organic matter types, Huagang Formation and Pinghu Formation are mainly type II and type III kerogen, having a certain hydrocarbon generating potential. While, from the point of view of maturity, lower member of Pinghu Formation is under low mature - mature stage, and the lower part of Huagang Formation mainly under mature to high mature stage. Its hydrocarbon generation peak is basically at present.

scholarly journals Carbon and nitrogen isoscape of particulate organic matter in the East China Sea

2021 ◽  
pp. 102667
Author(s):  
Pei-Chi Ho ◽  
Noboru Okuda ◽  
Chih-Fu Yeh ◽  
Pei-Ling Wang ◽  
Gwo-Ching Gong ◽  
...  
Keyword(s):  
Organic Matter ◽  
East China Sea ◽  
Particulate Organic Matter ◽  
East China ◽  
The East China Sea ◽  
Carbon And Nitrogen ◽  
China Sea

scholarly journals Factors controlling the distributions of dissolved organic matter in the East China Sea during summer

2020 ◽  
Vol 10 (1) ◽  
Author(s):  
Jeonghyun Kim ◽  
Tae-Hoon Kim ◽  
Sang Rul Park ◽  
Hyuk Je Lee ◽  
Jang Kyun Kim
Keyword(s):  
Organic Matter ◽  
Dissolved Organic Matter ◽  
East China Sea ◽  
East China ◽  
The East China Sea ◽  
China Sea

Multiple lipid biomarkers record organic matter sources and paleoenvironmental changes in the East China Sea coast over the past 160 years

The Holocene ◽  
2020 ◽  
Vol 31 (1) ◽  
pp. 16-27
Author(s):  
Lilei Chen ◽  
Feng Li ◽  
Jian Liu ◽  
Xingliang He
Keyword(s):  
Fatty Acids ◽  
Organic Matter ◽  
20Th Century ◽  
East China Sea ◽  
Lipid Biomarkers ◽  
East China ◽  
Early 20Th Century ◽  
The East China Sea ◽  
China Sea ◽  
Lipid Biomarker

The use of lipid biomarkers as paleoenvironmental proxies relies on an accurate assessment of their organic matter (OM) sources. In this study, we analyzed multiple lipids in core sediments recovered from the Zhejiang–Fujian coastal mud area to provide a 160-year record of OM input to the East China Sea (ECS) coastal sediments and to reconstruct paleoenvironmental conditions over this interval. The molecular composition of the samples was characterized by a mixture of natural lipids, particularly those derived from terrestrial vascular plants, marine/riverine plankton and macrophytes, and bacteria. The sources of some lipid components were ambiguous/mixed as they were potentially derived from multiple precursor organisms and because of limitations associated with modern survey techniques. There is evidence that early diagenesis caused the preferential degradation of labile aquatic lipids and that the degradation of terrestrial lipids was more severe when subjected to complex horizontal–vertical transportation processes associated with deposition, resuspension, and redeposition. These processes may have led to an enhanced terrestrial OM signal in the normal ( n)-alkane and n-alkanol records, which is at odds with, for example, those of the n-fatty acids, hopanoids, steranes, and sterols, which suggest a dominant marine OM source. Furthermore, we conclude that the occurrence of multiple sources, selective diagenesis, and test error has led to the distortion of redox and maturity indicators based on evidence from pristane-to-phytane (Pr/Ph) ratios and sterane/hopane indices in century scale. Overall, the phytol record suggests an increase in productivity after the early 20th century. Correspondingly, the diatom lipid biomarker records (based on C25 highly branched isoprenoid alkenes and C18:1ω9 fatty acids) reveal a fluctuating but overall increasing diatom productivity after the early 20th century, which coincides with a decreased proportion of the contribution from diatoms relative to that of total phytoplankton. This is believed to correspond to natural environmental changes, as well as anthropogenic impact.

Quiet Struggle in the East China Sea

2002 ◽  
Vol 101 (656) ◽  
pp. 271-277 ◽  
Author(s):  
Selig S. Harrison
Keyword(s):  
East China Sea ◽  
Oil And Gas ◽  
Northeast Asia ◽  
East China ◽  
Eastern Siberia ◽  
The East China Sea ◽  
China Sea ◽  
Oil And Gas Pipelines ◽  
Petroleum Resources ◽  
Gas Fields

Growing attention has been devoted in recent years to projected oil and gas pipelines that would link Russian gas fields in eastern Siberia and Sakhalin Island to China, Japan, and the two Koreas. By contrast, there is little awareness of the high economic and political stakes involved in the quiet struggle now unfolding in Northeast Asia over seabed petroleum resources, especially the conflict between China and Japan over the East China Sea.

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