A novel method for quantitative evaluation of oil content and mobility in shale oil reservoirs by NMR logging: a case study of the inter-salt shale oil in the Jianghan Basin
The evaluation of oil content and mobility in shale oil reservoirs is the key to the optimization of the ''sweet spot'' of shale reservoirs and the evaluation of available resources. In order to address the challenge of quantitative evaluation of oil content and mobility in shale...
| Main Authors: | , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
KeAi Communications Co., Ltd.
2024-01-01
|
| Series: | Unconventional Resources |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2666519023000468 |
| _version_ | 1797647581611819008 |
|---|---|
| author | Jing Lu Mi Liu Kun Liu Youlong Zou |
| author_facet | Jing Lu Mi Liu Kun Liu Youlong Zou |
| author_sort | Jing Lu |
| collection | DOAJ |
| description | The evaluation of oil content and mobility in shale oil reservoirs is the key to the optimization of the ''sweet spot'' of shale reservoirs and the evaluation of available resources. In order to address the challenge of quantitative evaluation of oil content and mobility in shale oil reservoirs, a combined multi-temperature pyrolysis and NMR experimental platform and experimental procedure are innovatively designed and implemented in this paper. The experiments reveal the NMR T2 distribution characteristics of hydrocarbon components in different reserve states. Accordingly, the NMR T2 cutoff values of different hydrocarbon components are determined, and the quantitative evaluation method based on NMR logging for total oil content and movable hydrocarbon content is established. The method has been applied to the inter-salt shale oil BYY2 well in Jianghan Oilfield, and the results show that the total porosity of the shale reservoir in the Qian 4 sub-Member is similar, but the total hydrocarbon content (0.04 g/kg∼16.0 g/kg) and the movable oil content (0.02 g/kg∼4.9 g/kg) are significantly different. Compared with the preferred scheme of reservoir based on porosity, accurate quantitative evaluation results of oil content and mobility based on logging provide a more straightforward indication of the resource potential of the reservoir that is available for exploitation. The experimental scheme of multi-temperature pyrolysis-NMR and the quantitative evaluation method for oil content and motility based on NMR logging will provide an important basis for resource evaluation, optimal formation selection and efficient development of shale oil reservoirs. |
| first_indexed | 2024-03-11T15:19:34Z |
| format | Article |
| id | doaj.art-d521359ff09e41e9b87b0cf6de18141e |
| institution | Directory Open Access Journal |
| issn | 2666-5190 |
| language | English |
| last_indexed | 2024-03-11T15:19:34Z |
| publishDate | 2024-01-01 |
| publisher | KeAi Communications Co., Ltd. |
| record_format | Article |
| series | Unconventional Resources |
| spelling | doaj.art-d521359ff09e41e9b87b0cf6de18141e2023-10-29T04:20:19ZengKeAi Communications Co., Ltd.Unconventional Resources2666-51902024-01-014100067A novel method for quantitative evaluation of oil content and mobility in shale oil reservoirs by NMR logging: a case study of the inter-salt shale oil in the Jianghan BasinJing Lu0Mi Liu1Kun Liu2Youlong Zou3SINOPEC Petroleum Exploration and Development Research Institute, Beijing, 100083, ChinaSINOPEC Petroleum Exploration and Development Research Institute, Beijing, 100083, ChinaSINOPEC Petroleum Exploration and Development Research Institute, Beijing, 100083, ChinaSINOPEC Petroleum Exploration and Development Research Institute, Beijing, 100083, ChinaThe evaluation of oil content and mobility in shale oil reservoirs is the key to the optimization of the ''sweet spot'' of shale reservoirs and the evaluation of available resources. In order to address the challenge of quantitative evaluation of oil content and mobility in shale oil reservoirs, a combined multi-temperature pyrolysis and NMR experimental platform and experimental procedure are innovatively designed and implemented in this paper. The experiments reveal the NMR T2 distribution characteristics of hydrocarbon components in different reserve states. Accordingly, the NMR T2 cutoff values of different hydrocarbon components are determined, and the quantitative evaluation method based on NMR logging for total oil content and movable hydrocarbon content is established. The method has been applied to the inter-salt shale oil BYY2 well in Jianghan Oilfield, and the results show that the total porosity of the shale reservoir in the Qian 4 sub-Member is similar, but the total hydrocarbon content (0.04 g/kg∼16.0 g/kg) and the movable oil content (0.02 g/kg∼4.9 g/kg) are significantly different. Compared with the preferred scheme of reservoir based on porosity, accurate quantitative evaluation results of oil content and mobility based on logging provide a more straightforward indication of the resource potential of the reservoir that is available for exploitation. The experimental scheme of multi-temperature pyrolysis-NMR and the quantitative evaluation method for oil content and motility based on NMR logging will provide an important basis for resource evaluation, optimal formation selection and efficient development of shale oil reservoirs.http://www.sciencedirect.com/science/article/pii/S2666519023000468Adsorbed oilOil-bearing propertyMobilityNuclear magnetic resonanceQuantitative evaluation by loggingInter-salt shale oil |
| spellingShingle | Jing Lu Mi Liu Kun Liu Youlong Zou A novel method for quantitative evaluation of oil content and mobility in shale oil reservoirs by NMR logging: a case study of the inter-salt shale oil in the Jianghan Basin Unconventional Resources Adsorbed oil Oil-bearing property Mobility Nuclear magnetic resonance Quantitative evaluation by logging Inter-salt shale oil |
| title | A novel method for quantitative evaluation of oil content and mobility in shale oil reservoirs by NMR logging: a case study of the inter-salt shale oil in the Jianghan Basin |
| title_full | A novel method for quantitative evaluation of oil content and mobility in shale oil reservoirs by NMR logging: a case study of the inter-salt shale oil in the Jianghan Basin |
| title_fullStr | A novel method for quantitative evaluation of oil content and mobility in shale oil reservoirs by NMR logging: a case study of the inter-salt shale oil in the Jianghan Basin |
| title_full_unstemmed | A novel method for quantitative evaluation of oil content and mobility in shale oil reservoirs by NMR logging: a case study of the inter-salt shale oil in the Jianghan Basin |
| title_short | A novel method for quantitative evaluation of oil content and mobility in shale oil reservoirs by NMR logging: a case study of the inter-salt shale oil in the Jianghan Basin |
| title_sort | novel method for quantitative evaluation of oil content and mobility in shale oil reservoirs by nmr logging a case study of the inter salt shale oil in the jianghan basin |
| topic | Adsorbed oil Oil-bearing property Mobility Nuclear magnetic resonance Quantitative evaluation by logging Inter-salt shale oil |
| url | http://www.sciencedirect.com/science/article/pii/S2666519023000468 |
| work_keys_str_mv | AT jinglu anovelmethodforquantitativeevaluationofoilcontentandmobilityinshaleoilreservoirsbynmrloggingacasestudyoftheintersaltshaleoilinthejianghanbasin AT miliu anovelmethodforquantitativeevaluationofoilcontentandmobilityinshaleoilreservoirsbynmrloggingacasestudyoftheintersaltshaleoilinthejianghanbasin AT kunliu anovelmethodforquantitativeevaluationofoilcontentandmobilityinshaleoilreservoirsbynmrloggingacasestudyoftheintersaltshaleoilinthejianghanbasin AT youlongzou anovelmethodforquantitativeevaluationofoilcontentandmobilityinshaleoilreservoirsbynmrloggingacasestudyoftheintersaltshaleoilinthejianghanbasin AT jinglu novelmethodforquantitativeevaluationofoilcontentandmobilityinshaleoilreservoirsbynmrloggingacasestudyoftheintersaltshaleoilinthejianghanbasin AT miliu novelmethodforquantitativeevaluationofoilcontentandmobilityinshaleoilreservoirsbynmrloggingacasestudyoftheintersaltshaleoilinthejianghanbasin AT kunliu novelmethodforquantitativeevaluationofoilcontentandmobilityinshaleoilreservoirsbynmrloggingacasestudyoftheintersaltshaleoilinthejianghanbasin AT youlongzou novelmethodforquantitativeevaluationofoilcontentandmobilityinshaleoilreservoirsbynmrloggingacasestudyoftheintersaltshaleoilinthejianghanbasin |