Results 21 to 30 of about 277 (167)

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

Geofluids, 2021
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 ...
Minghui Geng, Ruwei Zhang, Shengxiong Yang, Jun Guo, Zongheng Chen   +4 more
doaj   +1 more source

A Flat‐Lying Transitional Free Gas to Gas Hydrate System in a Sand Layer in the Qiongdongnan Basin of the South China Sea

Geophysical Research Letters, Volume 50, Issue 24, 28 December 2023., 2023
Abstract Most marine gas hydrate systems follow a vertical pattern with hydrate overlying free gas. Here we document the discovery of a gas to hydrate system in a horizontal sand layer in the Qiongdongnan Basin of the South China Sea. Eight wells were drilled by the Guangzhou Marine Geological Survey in 2021–2022 to investigate the occurrence and ...
Zenggui Kuang, Ann Cook, Jinfeng Ren, Wei Deng, Yuncheng Cao, Huimin Cai   +5 more
wiley   +1 more source

An Epifaunal Community Succession Sequence Driven by the Biogeochemical Footprint With Different Methane Seepage Intensity of the Deep Seafloor

Earth's Future, Volume 11, Issue 11, November 2023., 2023
Abstract Methane seepage, generated from natural processes or gas hydrate dissociation, drives the development of cold seep ecosystems and leads to atmosphere methane emission, thereby influencing climate change. Uncovering the intrinsic interactions among methane seepage intensities, biogeochemical processes in the sediment, and benthic community ...
Hui Zhang, Jing‐Chun Feng, Yongming Shen, Mingrui Zhang, Yanyan Huang, Pian Li, Liwei Sun, Si Zhang, Zhifeng Yang   +8 more
wiley   +1 more source

Seismically Imaged Crustal Breakup in the Southwest Taiwan Basin of the Northeastern South China Sea Margin

Geochemistry, Geophysics, Geosystems, Volume 24, Issue 8, August 2023., 2023
Abstract The Southern Depression of the Southwest Taiwan Basin is an ENE‐trending wide rift in the northeastern South China Sea margin. Though known as highly thinned, the maximum degree of crustal extension remains unclear. Here, we present three NW‐trending multi‐channel seismic profiles crossing the depression askew, and another profile traversing ...
Changliang Chen, Pin Yan, Junhui Yu, Guangjian Zhong   +3 more
wiley   +1 more source

Morphology and Depositional Processes of a Carbonate‐Filled Canyon in the Carboniferous KT‐II Formation of the Eastern Precaspian Basin, Kazakhstan: Insight from 3D Seismic Data

Geofluids, Volume 2023, Issue 1, 2023., 2023
Canyons in carbonate depositional settings, as important elements of the source‐to‐sink system, remain poorly studied compared to those in siliciclastic depositional environments. The latest high‐resolution three‐dimensional seismic data, well logs, and core data at the eastern edge of the Precaspian Basin are used to investigate the geomorphology ...
Jiapeng Wu, Xiaodong Cheng, Shanbo Sheng, Leyuan Fan, Kai Guo, Xining Li, Wan Diao, Unmei Tai, Shutang Jin, Shengbin Zhang, Xinxin Song, Mercè Corbella   +11 more
wiley   +1 more source

Shallow Overpressure Formation in the Deep Water Area of the Qiongdongnan Basin, China

Frontiers in Earth Science, 2022
The scarcity of drilling in the deep water area of Qiongdongnan Basin restricts the cognition and prediction of overpressure. In this paper, a shallow zone of overpressure at the depth of 900–1,200 m below the sea floor in the deep water area was found by analyzing electronic logs, mud pressure (Mud pressure is a product of the height of the column of ...
Jinfeng Ren, Jinfeng Ren, Litao Xu, Litao Xu, Wanzhong Shi, Wanzhong Shi, Wei Yang, Wei Yang, Ren Wang, Ren Wang, Yulin He, Yulin He, Hao Du, Hao Du   +13 more
openaire   +2 more sources

Quantitative analysis of the risk of hydrogen sulfide release from gas hydrates

Frontiers in Earth Science, 2023
The role that H2S plays in the global sulfur cycle has been studied extensively in recent years. This paper focuses on the influence of H2S released from gas hydrates on sulfur cycle and establishes a one-dimensional mathematical model to calculate the ...
Xianqing Wang, Xianqing Wang, Xianqing Wang, Siqing Liu, Bin Zhao, Bin Zhao, Yanfu Yao, Yanfu Yao, Yanfu Yao, Gang Wu, Gang Wu, Gang Wu, Rui Xie, Rui Xie, Rui Xie, Yutong Fu, Yutong Fu, Yutong Fu, Zijie Ning   +18 more
doaj   +1 more source

Sedimentary characteristics and significance in hydrocarbon exploration of sandy debris flow in Meishan Formation of the northern Lingshui Sag, Qiongdongnan Basin

地质科技通报, 2021
Through comprehensive analysis of core description, core slice observation and grain size data, in combination with regional palaeogeomorphology and seismic facies study, the sedimentary structure characteristics and its identification mark of the ...
Anqi Li, Qi Ye, Zhenzhen Wang, Ming Li, Kui Chen   +4 more
doaj   +1 more source

Origin and accumulation mechanism of shallow gases in the North Baodao Slope, Qiongdongnan Basin, South China Sea

Petroleum Exploration and Development, 2012
On the basis of geochemical characteristics and origins of gases in the North Baodao slope of the Qiongdongnan Basin, the gas migration and accumulation episodes and reservoir forming time are investigated and the reservoir forming model is built for the
Baojia HUANG, Li LI, Heting HUANG
doaj   +1 more source

Accumulation of natural gas hydrate based on migrating system: a case study of H zone of Qiongdongnan Basin

Shiyou shiyan dizhi, 2022
Gas hydrate is greatly developed in the Qiongdongnan Basin which is one of the key exploration targets in the South China Sea, but the geological study of gas hydrate is insufficient.
Qi FAN, Qingping LI, Tao WU, Lixia LI, Weixin PANG, Zhenyu ZHU   +5 more
doaj   +1 more source