A marine controlled-source electromagnetic imaging of gas hydrates and gas sources in the Shenhu area, South China Sea

被引：0
|
作者：
Jing, Jianen [1 ]
Zhao, Qingxian [2 ,3 ,4 ]
Luo, Xianhu [2 ,3 ,4 ]
Liu, Chenggong [1 ]
Chen, Kai [1 ]
Wang, Meng [1 ]
Deng, Ming [1 ]
Wu, Zhongliang [2 ,3 ,4 ]
机构：
[1] China University of Geosciences (Beijing), Beijing
[2] Guangzhou Marine Geological Survey, China Geological Survey, Guangdong, Guangzhou
[3] Key Laboratory of Marine Mineral Resources, Ministry of Natural Resources, Guangdong, Guangzhou
[4] National Engineering Research Center for Gas Hydrate Exploration and Development, Guangdong, Guangzhou
来源：
Dizhi Xuebao/Acta Geologica Sinica | 2024年 / 98卷 / 09期
关键词：
gas hydrate; marine controlled-source electromagnetics; resistivity model; Shenhu area; two-dimensional inversion;
D O I：
10.19762/j.cnki.dizhixuebao.2024185
中图分类号：
学科分类号：
摘要：
The presence of a bottom simulating reflector (BSR) on seismic profiles serves as a reliable indicator of the lower boundary of natural gas hydrate accumulations, a phenomenon that has been confirmed by drilling data. The Shenhu area in the South China Sea is a prominent region for natural gas hydrate (referred to as “hydrates”) research. However, the complex geological structures andlimited spatial coverage of drilling sites pose significant challenges to comprehensively characterizing hydrate distribution and associated gas source channels through seismic and drilling data alone.The distinct electrical resistivity contrast between hydrate-bearing formations and surrounding rocks presents a unique opportunity for geophysical exploration. Marine controlled-source electromagnetic (MCSEM) data,which effectively captures this resistivity contrast, provides a valuable toolfor detecting both hydrates and gas source channels.This study presents the findings of MCSEM exploration research conducted in the Shenhu area. Electromagnetic field data were collected at 15 discrete sites along a designated survey line. Subsequent data processing and two-dimensional inversion yielded two-dimensional resistivity images of the seabed. The reliability of the MCSEM inversion results was rigorously evaluated through sensitivity analysis. By integrating logging-while-drilling (LWD) data from the SH-W07-2016 well and seismic data, the twodimensional resistivity profile was interpreted to infer the distribution of hydrates and free gas along the profile. Two distinct forms of hydrate reservoir structures were identified, and their structural origins were subsequently analyzed. © 2024 Geological Society of China. All rights reserved.
引用
收藏
页码：2694 / 2708
页数：14
相关论文
共 92 条
  • [81] Jianliang Ye, Jiangong Wei, Jinqiang Liang, Jingan Lu, Hailong Lu, Wei Zhang, Complex gas hydrate system in a gas chimney, South China Sea, Marine and Petroleum Geology, 104, pp. 29-39, (2019)
  • [82] Yu Xinghe, Wang Jianzhong, Liang Jinqiang, Li Shunli, Xiaoming Zeng, Li Wen, Depositional characteristics and accumulation model of gas hydrates in northern South China Sea, Marine and Petroleum Geology, 56, pp. 74-86, (2014)
  • [83] Guangxue Zhang, Jinqiang Liang, Jingan Lu, Shengxiong Yang, Ming Zhang, Holland M, Schultheiss P, Su Xin, Sha Zhibin, Xu Huaning, Yuehua Gong, Fu Shaoying, Wang Lifeng, Kuang Zenggui, Geological features, controlling factors and potential prospects of the gas hydrate occurrence in the east part of the Pearl River Mouth basin, South China Sea, Marine and Petroleum Geology, 67, pp. 356-367, (2015)
  • [84] Zhang Wei, Liang Jinqiang, Lu Jingan, Wei Jiangong, Su Pibo, Fang Yunxin, Guo Yiqun, Yang Shengxiong, Zhang Guangxue, Accumulation features and mechanisms of high saturation natural gas hydrate in Shenhu area, northern South China Sea, Petroleum Exploration and Development, 44, 5, pp. 708-719, (2017)
  • [85] Zhang Wei, Liang Jinqiang, Su Pibo, Wei Jiangong, Sha Zhibin, Lin Lin, Liang Jin, Huang Wei, Migrating pathways of hydrocarbons and their controlling effects associated with high saturation gas hydrate in Shenhu area, northern South China Sea, Geology in China, 45, 1, pp. 1-14, (2018)
  • [86] Wei Zhang, Jinqiang Liang, Jiangong Wei, Pibo Su, Lin Lin, Wei Huang, Origin of natural gases and associated gas hydrates in the Shenhu area, northern South China Sea:Results from the China gas hydrate drilling expeditions, Journal of Asian Earth Sciences, 183, (2019)
  • [87] Wei Zhang, Jinqiang Liang, Zhifeng Wan, Pibo Su, Huang Wei, Lifeng Wang, Lin Lin, Dynamic accumulation of gas hydrates associated with the channel-levee system in the Shenhu area, northern South China Sea, Marine and Petroleum Geology, 117, (2020)
  • [88] Wei Zhang, Jinqiang Liang, Jiangong Wei, Pibo Su, Lin Lin, Wei Huang, Yiqun Guo, Wei Deng, Xiaolu Yang, Zhifeng Wan, Geological and geophysical features of and controls on occurrence and accumulation of gas hydrates in the first offshore gas-hydrate production test region in the Shenhu area,northern South China Sea, Marine and Petroleum Geology, 114, (2020)
  • [89] Wei Zhang, Jinqiang Liang, Qianyong Liang, Jiangong Wei, Zhifeng Wan, Junxi Feng, Wei Huang, Jing Zhao, Miaomiao Meng, Wei Deng, Chongmin Chen, Gas hydrate accumulation and occurrence associated with cold seep systems in the northern South China Sea:An overview, Geofluids, 2021, pp. 1-24, (2021)
  • [90] Xudong Zhang, Yin Cheng, Zhang Gulan, Confirmation of AVO attribute inversion methods for gas hydrate characteristics using drilling results from the Shenhu area, South China Sea, Pure and Applied Geophysics, 178, 2, pp. 477-490, (2021)
12345678910