| 南海北部神狐海域细粒储层矿物组分对天然气水合物储集赋存的影响 |
| |
| 引用本文： | 徐小蕾,白辰阳,苏丕波,马倩,张宇,梁金强.南海北部神狐海域细粒储层矿物组分对天然气水合物储集赋存的影响[J].地质论评,2023,69(6):2023060012-2023060012. |
| |
| 作者姓名： | 徐小蕾 白辰阳 苏丕波 马倩 张宇 梁金强 |
| |
| 作者单位： | 1）中国地质大学（北京）海洋学院，北京，100083;1）中国地质大学（北京）海洋学院，北京，100083；2）极地地质与海洋矿产教育部重点实验室（中国地质大学（北京）），北京，100083；3）广州海洋地质调查局三亚南海地质研究所，海南三亚，572000;3）广州海洋地质调查局三亚南海地质研究所，海南三亚，572000；4）中国地质调查局天然气水合物工程技术中心，北京，100037；5）自然资源部海底矿产资源重点实验室，中国地质调查局广州海洋地质调查局，广州，510075;6）中国石油集团长庆油田分公司第一采气厂，陕西靖边，718500 |
| |
| 基金项目： | 本文为南海重点海域天然气水合物资源勘查项目（编号：DD20230064）和崂山实验室科技创新项目（编号：LSKJ202203501）的成果 |
| |
| 摘 要： | 为了探明矿物类型对于天然气水合物成藏的影响，笔者等利用南海北部神狐海域W07站位样品及其水合物饱和度数据，进行XRD全岩和黏土矿物测试分析、比表面积分析以及束缚水能力综合分析。结果表明，海床下110~127 m（即110~127 mbsf，meters below sea floor, 海床以下深度）为水合物储层段，海床下127~156 m为非水合物储层段。通过XRD分析可知，高石英及长石含量，低伊蒙混层含量的层段，比表面积与束缚水能力较低，说明其具有相对较好的孔渗条件，为水合物的运移与储集提供了良好的空间条件，因此形成水合物储层段；而在高伊蒙混层的层段中，比表面积较大，束缚水能力较强，其对甲烷气体及流体的吸附和束缚能力较强，对水合物成藏起到潜在的封隔作用，成为非储层段，储层与非储层段纵向叠置序列有利于优质水合物储层的形成。本次研究总结了矿物组分与优质水合物储层之间的关系，并揭示两者存在的潜在成因联系，以期丰富水合物富集成藏的基础理论，对未来南海北部天然气水合物的商业化开发提供支持。
|
| 关 键 词： | 南海北部 神狐海域 GMGS4 天然气水合物 黏土矿物 |
| 收稿时间： | 2023/7/22 0:00:00 |
| 修稿时间： | 2023/11/12 0:00:00 |
Influence of mineral fraction of fine-grained reservoir on gas hydrate storage and deposition in the Shenhu area, northern South China Sea |
| |
| XU Xiaolei,BAI Chenyang,SU Pibo,MA Qian,ZHANG Yu,LIANG Jinqiang.Influence of mineral fraction of fine-grained reservoir on gas hydrate storage and deposition in the Shenhu area, northern South China Sea[J].Geological Review,2023,69(6):2023060012-2023060012. |
| |
| Authors: | XU Xiaolei BAI Chenyang SU Pibo MA Qian ZHANG Yu LIANG Jinqiang |
| |
| Abstract: | As a new type of clean energy to replace conventional fossil energy, natural gas hydrate research has been increasingly emphasized by the academic community. In the past 40 years, western countries have carried out a large number of investigations and studies on natural gas hydrates, and systematic research has been carried out on the mineralization conditions, distribution law, formation mechanism, exploration technology, economic evaluation and environmental effects of natural gas hydrates. In order to investigate the effect of mineral type on gas hydrate formation, the following studies are carried out in this paper. Methods: Whole rock and clay mineral XRD test analysis, specific surface area analysis, and comprehensive analysis of irreducible water capacity were carried out using the samples from site W07 and their hydrate saturation data in Shenhu Sea, northern South China Sea. Results: The results show that 110~127 meters below sea floor is the hydrate reservoir section and 127~156 meters below sea floor is the non-hydrate reservoir section. The XRD analysis shows that the layers with high quantity of quartz and feldspar and low quantity of I/S mixed-layer mineral have lower specific surface area and irreducible water capacity, which indicates that they have relatively good pore permeability conditions, providing good spatial conditions for hydrate transport and storage, and therefore forming hydrate reservoir sections; while in the layers with high quantity of I/S mixed-layer mineral, the specific surface area is larger, the irreducible water capacity is stronger, and its adsorption and irreducible capacity of methane gas and fluid are stronger, and its adsorption and irreducible capacity for hydrate are stronger irreducible capacity, which plays a potential sealing role for hydrate formation and becomes non-reservoir section. Reservoir and non-reservoir section vertical stacking sequence is conducive to the formation of high-quality hydrate reservoirs. Conclusions: The present study summarizes the relationship between mineral components and high-quality hydrate reservoirs, and reveals the potential genesis links between the two, with a view to enriching the basic theory of hydrate enrichment and reservoir formation, and supporting the future commercial development of natural gas hydrates in the northern part of the South China Sea. |
| |
| Keywords: | north South China Sea Shenhu sea area GMGS4 gas hydrates clay minerals |
|
| 点击此处可从《地质论评》浏览原始摘要信息 |
| 点击此处可从《地质论评》下载免费的PDF全文 |
|
