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| DOI | 10.1306/04101917386 |
| The architecture of organic matter and its pores in highly mature gas shales of the lower Silurian Longmaxi Formation in the upper Yangtze platform, south China | |
| Ji W.; Ji W.; Hao F.; Schulz H.-M.; Song Y.; Song Y.; Tian J.; Tian J. | |
| 发表日期 | 2019 |
| ISSN | 0149-1423 |
| 起始页码 | 2909 |
| 结束页码 | 2942 |
| 卷号 | 103期号:12 |
| 英文摘要 | The nanometer-scale architecture of organic matter (OM) and associated pores in highly mature gas shales from the lower Silurian Longmaxi Formation in the upper Yangtze platform of south China were investigated using field emission scanning electron microscopy (SEM), focused ion beam SEM, and lowpressure gas (N2 and CO2) adsorption bulk pore characterization. The Longmaxi shale comprises fine-grained siliciclastic rocks deposited in a marine shelf environment, which was dominated by quartz and clayminerals. Four porousOMtypes were found in the Longmaxi shale on the basis of the chemical composition and spatial occurrence of OM, including (1) isolated original OM particles, (2) OM-clay mineral complexes, (3) OM-heavy mineral complexes, and (4) secondarymigrated bituminousOM. The pores in the particulate OM are not homogeneously distributed, and the processes leading to different pores depend on the specific OM type. The nature of OM-hosted pores is a result of several factors, such as primary porous kerogen, mechanical compaction, organic-inorganic interactions, gaseous and liquid hydrocarbon generation, retention, and expulsion. Pore volumes and specific surface areas of the Longmaxi shale derived fromlow-pressureN2 and CO2 adsorption experiments reveal positive linear relationships with total organic carbon contents, which indicates that the pore systems in the highly mature Longmaxi shale are dominated by OM-hosted pores. Additionally, the OM-hosted pores appear connected compared to pores in the mineral matrix. Therefore, the OM-hosted pore systems offer the preferential storage space and primary migration pathways for natural gas in the Longmaxi shale reservoir. © 2019 The American Association of Petroleum Geologists. All rights reserved. |
| 关键词 | BiogeochemistryCarbon dioxideField emission microscopesIon beamsMineralsScanning electron microscopyShale gasChemical compositionsField emission scanning electron microscopyFine-grained siliciclastic rocksLinear relationshipsMechanical compactionOrganic-inorganic interactionsPore characterizationsTotal organic carbon contentOrganic carbonarchitectureorganic matterporosityshale gasSilurianChinaLongmen MountainsYangtze Platform |
| 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/131698 |
| 推荐引用方式 GB/T 7714 | Ji W.,Ji W.,Hao F.,et al. The architecture of organic matter and its pores in highly mature gas shales of the lower Silurian Longmaxi Formation in the upper Yangtze platform, south China[J]. AAPG Bulletin,2019,103(12). |
| APA | Ji W..,Ji W..,Hao F..,Schulz H.-M..,Song Y..,...&Tian J..(2019).The architecture of organic matter and its pores in highly mature gas shales of the lower Silurian Longmaxi Formation in the upper Yangtze platform, south China.,103(12). |
| MLA | Ji W.,et al."The architecture of organic matter and its pores in highly mature gas shales of the lower Silurian Longmaxi Formation in the upper Yangtze platform, south China".103.12(2019). |
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