Distribution and occurrence of pore water and retained oil in nanopores of marine-terrestrial transitional shales during oil generation and expulsion: Implications from a thermal simulation experiment on shale plug samples
文献类型：期刊论文
| 作者 | Fan, Qizhang3; Cheng, Peng1,2; Tian, Hui1,2; Gai, Haifeng1,2; Xiao, Xianming3 |
| 刊名 | MARINE AND PETROLEUM GEOLOGY
 |
| 出版日期 | 2023 |
| 卷号 | 150页码:106125 |
| 关键词 | ORGANIC-RICH SHALES NANOMETER-SCALE PORES EAGLE FORD FORMATION BARNETT SHALE METHANE SORPTION STORAGE CAPACITY GAS GENERATION YANCHANG SHALE CONNATE WATER WORTH BASIN |
| ISSN号 | 0264-8172 |
| DOI | 10.1016/j.marpetgeo.2023.106125 |
| 英文摘要 | The distribution and occurrence of pore water and retained oil in shale nanopores is a key scientific issue confronting the evaluation, exploration and development of shale hydrocarbon resources. At present, however, relevant researches are scarce, especially on marine-terrestrial transitional (MTT) shales. In this study, a thermal simulation experiment was performed on a set of water-saturated shale plug samples prepared from a low-maturity MTT shale. The pore water and retained oil contents of the artificially matured samples were quantified, and the pore structures under moist, dried, and solvent extracted conditions were investigated. The results show that the pore water content of the shale decreases with Ro increasing from 0.75% to 0.97% and then increases with Ro further increasing to 1.53%, which exhibits a negative correlation with the retained oil content during the oil generation and expulsion. The pore water occurs mainly in filling, adsorption and water-cluster states in micropores (10 nm), respectively. The retained oil is mainly in a filling or dissolved state in the micropores and small non-micropores and in an oil-cluster state in the large non-micropores. The pore water and retained oil in shale micropores are stored in the inorganic matter (IM) and organic matter (OM) micropores, respectively. During oil generation and expulsion, the IM micropores are fully saturated by the pore water that is barely expelled, and most of the pore water is stored in non-micropores, especially in large non-micropores. With increasing maturity, the distribution of retained oil in nanopores changes obviously. The retained oil in non-micropores tends to be stored in the large non-micropores at low-maturity stages, occurs uniformly in both the small and large non-micropores at mature stages, and is dominantly reserved in the small non-micropores and micropores at high-maturity stages. These results have significances for understanding the accumulation mechanism of shale oil and gas resources under geological conditions and evaluating their resource potential. ? 2023 Elsevier Ltd |
| WOS研究方向 | Geosciences, Multidisciplinary |
| 语种 | 英语 |
| WOS记录号 | WOS:000968049900001 |
| 源URL | [http://ir.gig.ac.cn/handle/344008/80261]  |
| 专题 | 有机地球化学国家重点实验室 |
| 作者单位 | 1.CAS Center for Excellence in Deep Earth Science, Guangzhou; 510640, China 2.State Key Laboratory of Organic Geochemistry, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou; 510640, China 3.School of Energy Resources, China University of Geosciences (Beijing), Beijing; 100083, China |
| 推荐引用方式 GB/T 7714 | Fan, Qizhang,Cheng, Peng,Tian, Hui,et al. Distribution and occurrence of pore water and retained oil in nanopores of marine-terrestrial transitional shales during oil generation and expulsion: Implications from a thermal simulation experiment on shale plug samples[J]. MARINE AND PETROLEUM GEOLOGY,2023,150:106125. |
| APA | Fan, Qizhang,Cheng, Peng,Tian, Hui,Gai, Haifeng,&Xiao, Xianming.(2023).Distribution and occurrence of pore water and retained oil in nanopores of marine-terrestrial transitional shales during oil generation and expulsion: Implications from a thermal simulation experiment on shale plug samples.MARINE AND PETROLEUM GEOLOGY,150,106125. |
| MLA | Fan, Qizhang,et al."Distribution and occurrence of pore water and retained oil in nanopores of marine-terrestrial transitional shales during oil generation and expulsion: Implications from a thermal simulation experiment on shale plug samples".MARINE AND PETROLEUM GEOLOGY 150(2023):106125. |
入库方式： OAI收割
来源：广州地球化学研究所
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