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  2. 地质与地球物理研究所
  3. 中国科学院地质与地球物理研究所
  4. 中国科学院页岩气与地质工程重点实验室
Mineralogy and pore characteristics of marine gas hydrate-bearing sediments in the northern South China Sea

文献类型：期刊论文

作者Wang, Xinxu1,3,6; Feng, Junxi4,5; Zhang, Liuping2,6; Yuan, Yuan1,3,6; Xu, Chenlu; Liang, Jinqiang4,5; Yang, Jijin1,3,6
刊名MARINE AND PETROLEUM GEOLOGY
出版日期2022-07-01
卷号141页码:17
ISSN号0264-8172
关键词Gas hydrate SEM Marine sediments Mineralogy Pore size distribution
DOI10.1016/j.marpetgeo.2022.105711
英文摘要Properties of host sediments are critical to understanding the formation and occurrence of gas hydrates in nature. This study investigates the mineralogy and pore characteristics of marine gas hydrate-bearing sediments (GHBS) within and below two high-saturation zones cored in drilling site W01 in the Qiongdongnan Basin in the South China Sea. The study involves an original application of high-resolution SEM imaging and automated mineralogy to fields-of-view (FOVs) large enough to undertake quantitative analyses at micro-to nano-scales. The samples are mainly fine-grained (<63 mu m) and mineralogically dominated by illite, montmorillonite and quartz, signif-icantly higher in clay mineral content than GHBS cored elsewhere in the South China Sea. Porosities determined from thin sections are from 27.6% to 33.0% and the pores are dominated by diameters of 0.1-1 mu m. A sample from the upper high-saturation GHBS is rich in clay minerals and clay-sized grains with pores mainly 0.1-1 mu m in size, while a sample from the lower zone of high-saturation GHBS has less clay minerals, more sands, and pore diameters of >1 mu m are as important as those 0.1-1 mu m in size. A third sample from an underlying zone has similar mineral compositions, grain-size and pore-size distributions to those in the uppermost high-saturation hydrate bearing zone. The largest pores are due to microfossil cavities, but their contribution to total porosity is <5%, suggesting their role in fine-grained sediments should not be overestimated. It is inferred that grain size and pore size, affected by variations in mineral content, are important factors influencing differences in hydrate accumulation. The geological source of gas and its migration are also factors determining the distribution of gas hydrate in the study area. Our approach using large FOVs to obtain quantitative micro-and nano-scale data from SEM images facilitates correlation to centimeter-and meter-scale information from well logs and seismic data, and offers opportunities to obtain new insights into the in-situ occurrence and accumulation of gas hydrate and its effects on physical properties of gas hydrate reservoirs.
WOS关键词METHANE HYDRATE ; QIONGDONGNAN BASIN ; CARBON-DIOXIDE ; SHENHU AREA ; SIZE DISTRIBUTION ; SEGMENTATION ; SLOPE ; ACCUMULATION ; MORPHOLOGY ; STABILITY
资助项目Key Research Program of the Institute of Geology & Geophysics, CAS[IGGCAS-201903] ; Key Special Project for Introduced Talents Team of Southern Marine Science and Engineering Guangdong Laboratory (Guangzhou)[GML2019ZD0102] ; Major Program of Guangdong Basic and Applied Research[2019B030302004]
WOS研究方向Geology
语种英语
出版者ELSEVIER SCI LTD
WOS记录号WOS:000802116500002
资助机构Key Research Program of the Institute of Geology & Geophysics, CAS ; Key Research Program of the Institute of Geology & Geophysics, CAS ; Key Research Program of the Institute of Geology & Geophysics, CAS ; Key Research Program of the Institute of Geology & Geophysics, CAS ; Key Special Project for Introduced Talents Team of Southern Marine Science and Engineering Guangdong Laboratory (Guangzhou) ; Key Special Project for Introduced Talents Team of Southern Marine Science and Engineering Guangdong Laboratory (Guangzhou) ; Key Special Project for Introduced Talents Team of Southern Marine Science and Engineering Guangdong Laboratory (Guangzhou) ; Key Special Project for Introduced Talents Team of Southern Marine Science and Engineering Guangdong Laboratory (Guangzhou) ; Major Program of Guangdong Basic and Applied Research ; Major Program of Guangdong Basic and Applied Research ; Major Program of Guangdong Basic and Applied Research ; Major Program of Guangdong Basic and Applied Research ; Key Research Program of the Institute of Geology & Geophysics, CAS ; Key Research Program of the Institute of Geology & Geophysics, CAS ; Key Research Program of the Institute of Geology & Geophysics, CAS ; Key Research Program of the Institute of Geology & Geophysics, CAS ; Key Special Project for Introduced Talents Team of Southern Marine Science and Engineering Guangdong Laboratory (Guangzhou) ; Key Special Project for Introduced Talents Team of Southern Marine Science and Engineering Guangdong Laboratory (Guangzhou) ; Key Special Project for Introduced Talents Team of Southern Marine Science and Engineering Guangdong Laboratory (Guangzhou) ; Key Special Project for Introduced Talents Team of Southern Marine Science and Engineering Guangdong Laboratory (Guangzhou) ; Major Program of Guangdong Basic and Applied Research ; Major Program of Guangdong Basic and Applied Research ; Major Program of Guangdong Basic and Applied Research ; Major Program of Guangdong Basic and Applied Research ; Key Research Program of the Institute of Geology & Geophysics, CAS ; Key Research Program of the Institute of Geology & Geophysics, CAS ; Key Research Program of the Institute of Geology & Geophysics, CAS ; Key Research Program of the Institute of Geology & Geophysics, CAS ; Key Special Project for Introduced Talents Team of Southern Marine Science and Engineering Guangdong Laboratory (Guangzhou) ; Key Special Project for Introduced Talents Team of Southern Marine Science and Engineering Guangdong Laboratory (Guangzhou) ; Key Special Project for Introduced Talents Team of Southern Marine Science and Engineering Guangdong Laboratory (Guangzhou) ; Key Special Project for Introduced Talents Team of Southern Marine Science and Engineering Guangdong Laboratory (Guangzhou) ; Major Program of Guangdong Basic and Applied Research ; Major Program of Guangdong Basic and Applied Research ; Major Program of Guangdong Basic and Applied Research ; Major Program of Guangdong Basic and Applied Research ; Key Research Program of the Institute of Geology & Geophysics, CAS ; Key Research Program of the Institute of Geology & Geophysics, CAS ; Key Research Program of the Institute of Geology & Geophysics, CAS ; Key Research Program of the Institute of Geology & Geophysics, CAS ; Key Special Project for Introduced Talents Team of Southern Marine Science and Engineering Guangdong Laboratory (Guangzhou) ; Key Special Project for Introduced Talents Team of Southern Marine Science and Engineering Guangdong Laboratory (Guangzhou) ; Key Special Project for Introduced Talents Team of Southern Marine Science and Engineering Guangdong Laboratory (Guangzhou) ; Key Special Project for Introduced Talents Team of Southern Marine Science and Engineering Guangdong Laboratory (Guangzhou) ; Major Program of Guangdong Basic and Applied Research ; Major Program of Guangdong Basic and Applied Research ; Major Program of Guangdong Basic and Applied Research ; Major Program of Guangdong Basic and Applied Research
源URL[http://ir.iggcas.ac.cn/handle/132A11/106028]  
专题地质与地球物理研究所_中国科学院页岩气与地质工程重点实验室
地质与地球物理研究所_中国科学院油气资源研究重点实验室
通讯作者Yang, Jijin
作者单位1.Univ Chinese Acad Sci, Coll Earth & Planetary Sci, Beijing 100049, Peoples R China
2.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Petr Resource, Beijing 100029, Peoples R China
3.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Shale Gas & Geoengn, Beijing 100029, Peoples R China
4.Southern Marine Sci & Engn Guangdong Lab Guangzho, Guangzhou 511458, Peoples R China
5.Guangzhou Marine Geol Survey, Guangzhou 510075, Peoples R China
6.Chinese Acad Sci, Innovat Acad Earth Sci, Beijing 100029, Peoples R China
推荐引用方式
GB/T 7714		 Wang, Xinxu,Feng, Junxi,Zhang, Liuping,et al. Mineralogy and pore characteristics of marine gas hydrate-bearing sediments in the northern South China Sea[J]. MARINE AND PETROLEUM GEOLOGY,2022,141:17.
APA Wang, Xinxu.,Feng, Junxi.,Zhang, Liuping.,Yuan, Yuan.,Xu, Chenlu.,...&Yang, Jijin.(2022).Mineralogy and pore characteristics of marine gas hydrate-bearing sediments in the northern South China Sea.MARINE AND PETROLEUM GEOLOGY,141,17.
MLA Wang, Xinxu,et al."Mineralogy and pore characteristics of marine gas hydrate-bearing sediments in the northern South China Sea".MARINE AND PETROLEUM GEOLOGY 141(2022):17.

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来源：地质与地球物理研究所

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