Two-dimensional spectrum characteristics and oil movability study of the shale oil reservoir
Shale oil is mainly stored in the nano–micro-pores of shale in the form of adsorption or in a free state. Among them, only free-state oil is the main contributor to shale oil production under natural elastic energy. Therefore, it is crucial to evaluate the movability of crude oil effectively. In thi...
| Main Authors: | , , , , , , , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Frontiers Media S.A.
2024-04-01
|
| Series: | Frontiers in Energy Research |
| Subjects: | |
| Online Access: | https://www.frontiersin.org/articles/10.3389/fenrg.2024.1389877/full |
| _version_ | 1797198553166118912 |
|---|---|
| author | Changhong Cai Changhong Cai Li Wang Li Wang Rui Zhang Qiang Kang Qiang Kang Qingxiu Zhang Qingxiu Zhang Dan Zhao Dan Zhao Jingsu Guo Jingsu Guo Manfei Chen Manfei Chen Hongbin Chen Lei Lei Ke Wang Ke Wang Jiahuan He Jiahuan He |
| author_facet | Changhong Cai Changhong Cai Li Wang Li Wang Rui Zhang Qiang Kang Qiang Kang Qingxiu Zhang Qingxiu Zhang Dan Zhao Dan Zhao Jingsu Guo Jingsu Guo Manfei Chen Manfei Chen Hongbin Chen Lei Lei Ke Wang Ke Wang Jiahuan He Jiahuan He |
| author_sort | Changhong Cai |
| collection | DOAJ |
| description | Shale oil is mainly stored in the nano–micro-pores of shale in the form of adsorption or in a free state. Among them, only free-state oil is the main contributor to shale oil production under natural elastic energy. Therefore, it is crucial to evaluate the movability of crude oil effectively. In this paper, focusing on the Jurassic shale oil reservoir core in the middle-eastern Sichuan region of China, low-field nuclear magnetic resonance (NMR) technology is used to analyze the basic characteristics of shale oil core samples. Experiments on the low-field NMR one-dimensional and two-dimensional spectrum characteristics of the original core, heat-treated core, and thermogravimetric-treated shale core are carried out. The effects of the TG-MS method, T2 method, and the volatilization of light oil components on the movability of shale oil reservoirs are analyzed, and the movability characteristics of shale oil reservoirs in the middle-eastern Sichuan region are preliminarily clarified. The results show that under thermal treatment, the distribution range of the two-dimensional spectrum of the core oil occurrence area is significantly reduced, and the T1 and T2 distribution ranges are reduced by 10.9% and 60.7%, respectively. According to the TG-MS method, the mobile oil, bound oil, and adsorbed oil account for 74.7%, 8.1%, and 17.2%, respectively. The quantitative calculation of movable oil saturation by NMR combined with heat treatment is 65.6%, which is lower than that calculated using the thermogravimetric method. In order to calculate the movability more accurately, the scale effect between different samples should be considered. This study could provide a theoretical basis for the subsequent shale oil development program. |
| first_indexed | 2024-04-24T07:01:41Z |
| format | Article |
| id | doaj.art-18d2b9ee61b04bd69678a3cc88dc3049 |
| institution | Directory Open Access Journal |
| issn | 2296-598X |
| language | English |
| last_indexed | 2024-04-24T07:01:41Z |
| publishDate | 2024-04-01 |
| publisher | Frontiers Media S.A. |
| record_format | Article |
| series | Frontiers in Energy Research |
| spelling | doaj.art-18d2b9ee61b04bd69678a3cc88dc30492024-04-22T06:47:42ZengFrontiers Media S.A.Frontiers in Energy Research2296-598X2024-04-011210.3389/fenrg.2024.13898771389877Two-dimensional spectrum characteristics and oil movability study of the shale oil reservoirChanghong Cai0Changhong Cai1Li Wang2Li Wang3Rui Zhang4Qiang Kang5Qiang Kang6Qingxiu Zhang7Qingxiu Zhang8Dan Zhao9Dan Zhao10Jingsu Guo11Jingsu Guo12Manfei Chen13Manfei Chen14Hongbin Chen15Lei Lei16Ke Wang17Ke Wang18Jiahuan He19Jiahuan He20Exploration and Development Research Institute of PetroChina Southwest Oil and Gas Field Company, Chengdu, ChinaShale Gas Evaluation and Exploitation Key Laboratory of Sichuan Province, Chengdu, ChinaExploration and Development Research Institute of PetroChina Southwest Oil and Gas Field Company, Chengdu, ChinaShale Gas Evaluation and Exploitation Key Laboratory of Sichuan Province, Chengdu, ChinaExploration and Development Research Institute of PetroChina Southwest Oil and Gas Field Company, Chengdu, ChinaExploration and Development Research Institute of PetroChina Southwest Oil and Gas Field Company, Chengdu, ChinaShale Gas Evaluation and Exploitation Key Laboratory of Sichuan Province, Chengdu, ChinaExploration and Development Research Institute of PetroChina Southwest Oil and Gas Field Company, Chengdu, ChinaShale Gas Evaluation and Exploitation Key Laboratory of Sichuan Province, Chengdu, ChinaExploration and Development Research Institute of PetroChina Southwest Oil and Gas Field Company, Chengdu, ChinaShale Gas Evaluation and Exploitation Key Laboratory of Sichuan Province, Chengdu, ChinaExploration and Development Research Institute of PetroChina Southwest Oil and Gas Field Company, Chengdu, ChinaShale Gas Evaluation and Exploitation Key Laboratory of Sichuan Province, Chengdu, ChinaExploration and Development Research Institute of PetroChina Southwest Oil and Gas Field Company, Chengdu, ChinaShale Gas Evaluation and Exploitation Key Laboratory of Sichuan Province, Chengdu, ChinaExploration and Development Research Institute of PetroChina Southwest Oil and Gas Field Company, Chengdu, ChinaDevelopment Department of PetroChina Southwest Oil and Gas Field Company, Chengdu, ChinaExploration and Development Research Institute of PetroChina Southwest Oil and Gas Field Company, Chengdu, ChinaShale Gas Evaluation and Exploitation Key Laboratory of Sichuan Province, Chengdu, ChinaExploration and Development Research Institute of PetroChina Southwest Oil and Gas Field Company, Chengdu, ChinaShale Gas Evaluation and Exploitation Key Laboratory of Sichuan Province, Chengdu, ChinaShale oil is mainly stored in the nano–micro-pores of shale in the form of adsorption or in a free state. Among them, only free-state oil is the main contributor to shale oil production under natural elastic energy. Therefore, it is crucial to evaluate the movability of crude oil effectively. In this paper, focusing on the Jurassic shale oil reservoir core in the middle-eastern Sichuan region of China, low-field nuclear magnetic resonance (NMR) technology is used to analyze the basic characteristics of shale oil core samples. Experiments on the low-field NMR one-dimensional and two-dimensional spectrum characteristics of the original core, heat-treated core, and thermogravimetric-treated shale core are carried out. The effects of the TG-MS method, T2 method, and the volatilization of light oil components on the movability of shale oil reservoirs are analyzed, and the movability characteristics of shale oil reservoirs in the middle-eastern Sichuan region are preliminarily clarified. The results show that under thermal treatment, the distribution range of the two-dimensional spectrum of the core oil occurrence area is significantly reduced, and the T1 and T2 distribution ranges are reduced by 10.9% and 60.7%, respectively. According to the TG-MS method, the mobile oil, bound oil, and adsorbed oil account for 74.7%, 8.1%, and 17.2%, respectively. The quantitative calculation of movable oil saturation by NMR combined with heat treatment is 65.6%, which is lower than that calculated using the thermogravimetric method. In order to calculate the movability more accurately, the scale effect between different samples should be considered. This study could provide a theoretical basis for the subsequent shale oil development program.https://www.frontiersin.org/articles/10.3389/fenrg.2024.1389877/fullshale oillow-field nuclear magnetic resonancemoveable oiltwo-dimensional spectrumthermal gravity |
| spellingShingle | Changhong Cai Changhong Cai Li Wang Li Wang Rui Zhang Qiang Kang Qiang Kang Qingxiu Zhang Qingxiu Zhang Dan Zhao Dan Zhao Jingsu Guo Jingsu Guo Manfei Chen Manfei Chen Hongbin Chen Lei Lei Ke Wang Ke Wang Jiahuan He Jiahuan He Two-dimensional spectrum characteristics and oil movability study of the shale oil reservoir Frontiers in Energy Research shale oil low-field nuclear magnetic resonance moveable oil two-dimensional spectrum thermal gravity |
| title | Two-dimensional spectrum characteristics and oil movability study of the shale oil reservoir |
| title_full | Two-dimensional spectrum characteristics and oil movability study of the shale oil reservoir |
| title_fullStr | Two-dimensional spectrum characteristics and oil movability study of the shale oil reservoir |
| title_full_unstemmed | Two-dimensional spectrum characteristics and oil movability study of the shale oil reservoir |
| title_short | Two-dimensional spectrum characteristics and oil movability study of the shale oil reservoir |
| title_sort | two dimensional spectrum characteristics and oil movability study of the shale oil reservoir |
| topic | shale oil low-field nuclear magnetic resonance moveable oil two-dimensional spectrum thermal gravity |
| url | https://www.frontiersin.org/articles/10.3389/fenrg.2024.1389877/full |
| work_keys_str_mv | AT changhongcai twodimensionalspectrumcharacteristicsandoilmovabilitystudyoftheshaleoilreservoir AT changhongcai twodimensionalspectrumcharacteristicsandoilmovabilitystudyoftheshaleoilreservoir AT liwang twodimensionalspectrumcharacteristicsandoilmovabilitystudyoftheshaleoilreservoir AT liwang twodimensionalspectrumcharacteristicsandoilmovabilitystudyoftheshaleoilreservoir AT ruizhang twodimensionalspectrumcharacteristicsandoilmovabilitystudyoftheshaleoilreservoir AT qiangkang twodimensionalspectrumcharacteristicsandoilmovabilitystudyoftheshaleoilreservoir AT qiangkang twodimensionalspectrumcharacteristicsandoilmovabilitystudyoftheshaleoilreservoir AT qingxiuzhang twodimensionalspectrumcharacteristicsandoilmovabilitystudyoftheshaleoilreservoir AT qingxiuzhang twodimensionalspectrumcharacteristicsandoilmovabilitystudyoftheshaleoilreservoir AT danzhao twodimensionalspectrumcharacteristicsandoilmovabilitystudyoftheshaleoilreservoir AT danzhao twodimensionalspectrumcharacteristicsandoilmovabilitystudyoftheshaleoilreservoir AT jingsuguo twodimensionalspectrumcharacteristicsandoilmovabilitystudyoftheshaleoilreservoir AT jingsuguo twodimensionalspectrumcharacteristicsandoilmovabilitystudyoftheshaleoilreservoir AT manfeichen twodimensionalspectrumcharacteristicsandoilmovabilitystudyoftheshaleoilreservoir AT manfeichen twodimensionalspectrumcharacteristicsandoilmovabilitystudyoftheshaleoilreservoir AT hongbinchen twodimensionalspectrumcharacteristicsandoilmovabilitystudyoftheshaleoilreservoir AT leilei twodimensionalspectrumcharacteristicsandoilmovabilitystudyoftheshaleoilreservoir AT kewang twodimensionalspectrumcharacteristicsandoilmovabilitystudyoftheshaleoilreservoir AT kewang twodimensionalspectrumcharacteristicsandoilmovabilitystudyoftheshaleoilreservoir AT jiahuanhe twodimensionalspectrumcharacteristicsandoilmovabilitystudyoftheshaleoilreservoir AT jiahuanhe twodimensionalspectrumcharacteristicsandoilmovabilitystudyoftheshaleoilreservoir |