Effects of solvent extraction on pore structure properties and oil distribution in shales of alkaline lacustrine basins
文献类型：期刊论文
| 作者 | Zhang, Cunjian3; Hu, Qinhong3,4; Wang, Qiming3; Yang, Shengyu3; Li, Xiuhong5; Yang, Zhi1; Yu, Shuang6 ; Yan, Jianping2; Du, Changan3
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| 刊名 | MARINE AND PETROLEUM GEOLOGY
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| 出版日期 | 2025 |
| 卷号 | 171页码:20 |
| 关键词 | Solvent extraction Extractable organic matter (U)SAXS Pore connectivity Shale oil distribution |
| ISSN号 | 0264-8172 |
| DOI | 10.1016/j.marpetgeo.2024.107207 |
| 英文摘要 | Shale contains numerous nano-scale pores, whose pore structure property changes affect petroleum flow, complicating shale oil accumulation and exploration. Twelve shale samples from the Permian Fengcheng Formation in the Mahu Sag and the Permian Lucaogou Formation in the Jimusar Sag in northwestern China were analyzed to investigate the coupled oil distribution and pore structure in shales from alkaline lacustrine basins. Shale samples were comprehensively analyzed before and after solvent extraction using X-ray diffraction, total organic carbon measurement, Rock-Eval analyses, field emission-scanning electron microscopy, nitrogen physisorption (NP), and (ultra) small-angle X-ray scattering [(U)SAXS] to assess nanoscale pore structure (2-300 nm in diameter) and oil distribution. Solvent extraction increased total pore volume and specific surface area (SSA). However, the accessibility of nanoscale pores remains limited. Additionally, even after retained oil removal, (U) SAXS-derived total pore volumes are 1-10.4 times larger than NP-derived connected pore volumes. Complex variations in pore volume and SSA mainly result from the removal of extractable organic matter (EOM) and the refilling of small pores by organic matter. Despite the relatively small pore volume of mesopores (2-50 nm), the amount of EOM distribution in mesopores is comparable to that in macropores (50-300 nm); therefore, it is crucial not to overlook the retention capacity of mesopores for EOM. Macropores, particularly interparticle pores associated with quartz and feldspar, play a crucial role in oil mobility. The quantity and composition of EOM, along with other factors, can alter pore structure before and after solvent extraction and should be considered in evaluating the distribution and content of free oil. |
| WOS研究方向 | Geology |
| 语种 | 英语 |
| WOS记录号 | WOS:001358686700001 |
| 源URL | [http://ir.gig.ac.cn/handle/344008/82022]  |
| 专题 | 有机地球化学国家重点实验室 |
| 通讯作者 | Hu, Qinhong |
| 作者单位 | 1.PetroChina, Res Inst Petr Explorat & Dev, Beijing 100083, Peoples R China 2.Southwest Petr Univ, Sch Geosci & Technol, Chengdu 610500, Peoples R China 3.China Univ Petr East China, State Key Lab Deep Oil & Gas, Qingdao 266580, Peoples R China 4.Qingdao Marine Sci & Technol Ctr, Lab Marine Mineral Resource, Qingdao 266071, Peoples R China 5.Chinese Acad Sci, Shanghai Adv Res Inst, Shanghai Synchrotron Radiat Facil, Shanghai 201204, Peoples R China 6.Chinese Acad Sci, Guangzhou Inst Geochem, CAS Ctr Excellence Deep Earth Sci, State Key Lab Organ Geochem, Guangzhou 510640, Peoples R China |
| 推荐引用方式 GB/T 7714 | Zhang, Cunjian,Hu, Qinhong,Wang, Qiming,et al. Effects of solvent extraction on pore structure properties and oil distribution in shales of alkaline lacustrine basins[J]. MARINE AND PETROLEUM GEOLOGY,2025,171:20. |
| APA | Zhang, Cunjian.,Hu, Qinhong.,Wang, Qiming.,Yang, Shengyu.,Li, Xiuhong.,...&Du, Changan.(2025).Effects of solvent extraction on pore structure properties and oil distribution in shales of alkaline lacustrine basins.MARINE AND PETROLEUM GEOLOGY,171,20. |
| MLA | Zhang, Cunjian,et al."Effects of solvent extraction on pore structure properties and oil distribution in shales of alkaline lacustrine basins".MARINE AND PETROLEUM GEOLOGY 171(2025):20. |
入库方式： OAI收割
来源：广州地球化学研究所
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