Physical characteristics of high concentrated gas hydrate reservoir in the Shenhu production test area, South China Sea

Jiapeng JIN; Xiujuan WANG; Zhenyu ZHU; Pibo SU; Lixia LI; Qingping LI; Yiqun GUO; Jin QIAN; Zhendong LUAN; Jilin ZHOU

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Physical characteristics of high concentrated gas hydrate reservoir in the Shenhu production test area, South China Sea

Sedimentary processes and resource potential in the South China Sea | Updated：2024-10-12

- Physical characteristics of high concentrated gas hydrate reservoir in the Shenhu production test area, South China Sea
- Physical characteristics of high concentrated gas hydrate reservoir in the Shenhu production test area, South China Sea
- 海洋湖沼学报(英文) 2023年41卷第2期页码：694-709
- Affiliations：
  
  1.Frontiers Science Center for Deep Ocean Multispheres and Earth System, Key Lab of Submarine Geosciences and Prospecting Techniques, MOE and College of Marine Geosciences, Ocean University of China, Qingdao 266100, China
  2.Deep-sea Multidisciplinary Research Center & Laboratory for Marine Mineral Resources, Pilot National Laboratory for Marine Science and Technology (Qingdao), Qingdao 266237, China
  3.Center for Ocean Mega-Science & Key Laboratory of Marine Geology and Environment, Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China
  4.China National Offshore Oil Corporation Research Institute Co. Ltd., Beijing 100028, China
  5.Guangzhou Marine Geological Survey, China Geological Survey, Ministry of Natural Resources, Guangzhou 511458, China
  6.Haikou Center of Marine Geological Survey, China Geological Survey, Haikou 571127, China
- Author bio：
  
  wangxiujuan@ouc.edu.cn
- Funds：
  
  the Key Special Project for Introduced Talents Team of Southern Marine Science and Engineering Guangdong Laboratory (Guangzhou)(GML2019ZD0104);the National Natural Science Foundation of China(U19B2005;42076072);the Pilot National Laboratory for Marine Science and Technology (Qingdao) Initial Foundation(JCZX202019);the Research Start-up Funds of Zhufeng Scholars Program
- DOI：
  中图分类号：
- 收稿：2021-12-20，
  
  纸质出版：2023-03-01
- Accepted：
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Physical characteristics of high concentrated gas hydrate reservoir in the Shenhu production test area, South China Sea[J]. 海洋湖沼学报(英文), 2023,41(2):694-709.

JIN Jiapeng,WANG Xiujuan,ZHU Zhenyu,et al.Physical characteristics of high concentrated gas hydrate reservoir in the Shenhu production test area, South China Sea[J].Journal of Oceanology and Limnology,2023,41(02):694-709.
Physical characteristics of high concentrated gas hydrate reservoir in the Shenhu production test area, South China Sea[J]. 海洋湖沼学报(英文), 2023,41(2):694-709. DOI：

JIN Jiapeng,WANG Xiujuan,ZHU Zhenyu,et al.Physical characteristics of high concentrated gas hydrate reservoir in the Shenhu production test area, South China Sea[J].Journal of Oceanology and Limnology,2023,41(02):694-709. DOI：

摘要

Abstract

High concentrated and heterogeneous distribution of gas hydrates have been identified in the gas hydrate production test region in the Shenhu area

South China Sea. The gas hydrate-bearing sediments with high saturation locate at two ridges of submarine canyon with different thickness and saturations just above the bottom simulating reflection. The crossplots of gamma ray

acoustic impedance (P-impedance) and porosity at four sites show that the sediments can be divided into the upper and lower layers at different depths

indicating different geotechnical reservoir properties. Therefore

the depositional environments and physical properties at two ridges are analyzed and compared to show the different characteristics of hydrate reservoir. High porosity

high P-wave velocity

and coarse grain size indicate better reservoir quality and higher energy depositional environment for gas hydrate at Sites W18 and W19 than those at Sites W11 and W17. Our interpretation is that the base of canyon deposits at Sites W18 and W19 characterized by upward-coarsening units may be turbidity sand layers

thus significantly improving the reservoir quality with increasing gas hydrate saturation. The shelf and slope sliding deposits compose of the fine-grained sediments at Sites W11 and W17. The gas hydrate production test sites were conducted at the ridge of W11 and W17

mainly because of the thicker and larger area of gas hydrate-bearing reservoirs than those at Sites W18 and W19. All the results provide useful insights for assessing reservoir quality in the Shenhu area.

关键词

Keywords

references

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