Climate Change Data Portal
| DOI | 10.1306/08161918071 |
| Influence of tectonic exhumation on porosity of Wufeng-Longmaxi shale in the Fuling gas field of the eastern Sichuan Basin, China | |
| Liu R.; Liu R.; Hao F.; Hao F.; Engelder T.; Shu Z.; Yi J.; Xu S.; Teng C. | |
| 发表日期 | 2020 |
| ISSN | 0149-1423 |
| 起始页码 | 939 |
| 结束页码 | 959 |
| 卷号 | 104期号:4 |
| 英文摘要 | Thermal cracking of organic matter (OM) can enhance gas-shale porosity. However, thermally matured shales are generally characterized by low porosity with high OM content in tectonic exhumation settings. The Wufeng-Longmaxi shale in the Fuling gas field, China, was investigated via bulk analysis and scanning electron microscopy to reveal the influence of tectonic exhumation on the porosity of OM-rich shale. Thermal maturity and organic and mineralogical compositions are regionally homogeneous in the Fuling gas field. Shale porosity is positively correlated with total organic carbon (TOC) and clay mineral content in the gentle and open anticlines, respectively. The OM-hosted pores were preserved with spherical morphologies because of overpressure-associated overburden stress unloading in the gentle anticlines, whereas OM-hosted pores in the open anticlines are characterized by high aspect ratios and are regularly aligned perpendicular to lateral compression stress. A simple simulation confirmed that tectonic folding and compaction during exhumation caused the loss of porosity in the inner arcs of the open anticlines. Only pressure shadows formed by assemblages of clay mineral platelets and mechanically competent grains inhibited tectonic compaction of some OM-hosted pores in the open anticlines. Tectonic compaction of porosity generally increased the mean value of water saturation in the open anticlines. The extremely high water saturation (>60%) in the high-TOC interval (>2 wt. %) was generally associated with natural fractures, suggesting the occurrence of gas leakage. © 2020 The American Association of Petroleum Geologists. All rights reserved. |
| 关键词 | Aspect ratioClay mineralsCompactionGasesOrganic carbonScanning electron microscopyStructural geologyTectonicsUnloadingHigh aspect ratioLateral compressionMineralogical compositionsOverburden stressSpherical morphologiesTectonic exhumationTotal Organic CarbonWater saturationsPorosityclay mineralcompactioncompressioncracking (fracture)electron microscopyexhumationfoldinggas fieldorganic matteroverburdenporositypressuresaturationshaletotal organic carbonChinaChongqingFuling Gas FieldSichuanSichuan BasinTaiwanWufeng |
| 语种 | 英语 |
| 来源机构 | AAPG Bulletin |
| 文献类型 | 期刊论文 |
| 条目标识符 | http://gcip.llas.ac.cn/handle/2XKMVOVA/131670 |
| 推荐引用方式 GB/T 7714 | Liu R.,Liu R.,Hao F.,et al. Influence of tectonic exhumation on porosity of Wufeng-Longmaxi shale in the Fuling gas field of the eastern Sichuan Basin, China[J]. AAPG Bulletin,2020,104(4). |
| APA | Liu R..,Liu R..,Hao F..,Hao F..,Engelder T..,...&Teng C..(2020).Influence of tectonic exhumation on porosity of Wufeng-Longmaxi shale in the Fuling gas field of the eastern Sichuan Basin, China.,104(4). |
| MLA | Liu R.,et al."Influence of tectonic exhumation on porosity of Wufeng-Longmaxi shale in the Fuling gas field of the eastern Sichuan Basin, China".104.4(2020). |
| 条目包含的文件 | 条目无相关文件。 | |||||
| 个性服务 |
| 推荐该条目 |
| 保存到收藏夹 |
| 导出为Endnote文件 |
| 谷歌学术 |
| 谷歌学术中相似的文章 |
| [Liu R.]的文章 |
| [Liu R.]的文章 |
| [Hao F.]的文章 |
| 百度学术 |
| 百度学术中相似的文章 |
| [Liu R.]的文章 |
| [Liu R.]的文章 |
| [Hao F.]的文章 |
| 必应学术 |
| 必应学术中相似的文章 |
| [Liu R.]的文章 |
| [Liu R.]的文章 |
| [Hao F.]的文章 |
| 相关权益政策 |
| 暂无数据 |
| 收藏/分享 |
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。
