Application of NMR Logging in the Evaluation of Gulong Shale Oil
Gulong shale oil reservoir has a high clay content, complex pore structure, and developed micro-nano pore throats and micro fractures. It is difficult to evaluate the characterization of reservoir pore structure, physical properties, and oil content using conventional methods. In response to the abo...
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| Format: | Article |
| Language: | zho |
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Editorial Office of Well Logging Technology
2024-02-01
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| Series: | Cejing jishu |
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| Online Access: | https://www.cnpcwlt.com/#/digest?ArticleID=5573 |
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| author | CHEN Longchuan ZHANG Zhaoqian ZHENG Jiandong WANG Chunyan ZHU Jianhua WANG Wenjuan GAO Jifeng |
| author_facet | CHEN Longchuan ZHANG Zhaoqian ZHENG Jiandong WANG Chunyan ZHU Jianhua WANG Wenjuan GAO Jifeng |
| author_sort | CHEN Longchuan |
| collection | DOAJ |
| description | Gulong shale oil reservoir has a high clay content, complex pore structure, and developed micro-nano pore throats and micro fractures. It is difficult to evaluate the characterization of reservoir pore structure, physical properties, and oil content using conventional methods. In response to the above difficulties, based on rock physics experiments, a nuclear magnetic resonance (NMR) T2 cutoff effective porosity calculation method and a 2D NMR oil saturation calculation model considering small pore oil content are proposed. Through NMR interval porosity analysis, the pore structure of the Gulong shale reservoir is clarified. The average relative error of effective porosity calculated by the above method is 7.3%, and the average absolute error of oil saturation is 4.0%. This method improves the interpretation accuracy of key parameters submitted for reserves, also provides technical support for reserve calculation and development plan preparation and implementation. These technical processes and methods also have guiding significance for evaluating the effective porosity and oil saturation of shale oil, and the research content can help promote the development and utilization of unconventional oil and gas resources such as shale oil. |
| format | Article |
| id | doaj-art-cf72fbe95d2a45588bde4ac980419a70 |
| institution | DOAJ |
| issn | 1004-1338 |
| language | zho |
| publishDate | 2024-02-01 |
| publisher | Editorial Office of Well Logging Technology |
| record_format | Article |
| series | Cejing jishu |
| spelling | doaj-art-cf72fbe95d2a45588bde4ac980419a702025-08-20T03:08:17ZzhoEditorial Office of Well Logging TechnologyCejing jishu1004-13382024-02-0148111011610.16489/j.issn.1004-1338.2024.01.0141004-1338(2024)01-0110-07Application of NMR Logging in the Evaluation of Gulong Shale OilCHEN Longchuan0ZHANG Zhaoqian1ZHENG Jiandong2WANG Chunyan3ZHU Jianhua4WANG Wenjuan5GAO Jifeng6Exploration and Development Research Institute, CNPC Daqing Oilfield, Daqing, Heilongjiang 163712, ChinaExploration and Development Research Institute, CNPC Daqing Oilfield, Daqing, Heilongjiang 163712, ChinaExploration and Development Research Institute, CNPC Daqing Oilfield, Daqing, Heilongjiang 163712, ChinaExploration and Development Research Institute, CNPC Daqing Oilfield, Daqing, Heilongjiang 163712, ChinaExploration and Development Research Institute, CNPC Daqing Oilfield, Daqing, Heilongjiang 163712, ChinaExploration and Development Research Institute, CNPC Daqing Oilfield, Daqing, Heilongjiang 163712, ChinaExploration and Development Research Institute, CNPC Daqing Oilfield, Daqing, Heilongjiang 163712, ChinaGulong shale oil reservoir has a high clay content, complex pore structure, and developed micro-nano pore throats and micro fractures. It is difficult to evaluate the characterization of reservoir pore structure, physical properties, and oil content using conventional methods. In response to the above difficulties, based on rock physics experiments, a nuclear magnetic resonance (NMR) T2 cutoff effective porosity calculation method and a 2D NMR oil saturation calculation model considering small pore oil content are proposed. Through NMR interval porosity analysis, the pore structure of the Gulong shale reservoir is clarified. The average relative error of effective porosity calculated by the above method is 7.3%, and the average absolute error of oil saturation is 4.0%. This method improves the interpretation accuracy of key parameters submitted for reserves, also provides technical support for reserve calculation and development plan preparation and implementation. These technical processes and methods also have guiding significance for evaluating the effective porosity and oil saturation of shale oil, and the research content can help promote the development and utilization of unconventional oil and gas resources such as shale oil.https://www.cnpcwlt.com/#/digest?ArticleID=5573gulong shale oilnuclear magnetic resonance (nmr) loggingporosityoil saturation2d nmr |
| spellingShingle | CHEN Longchuan ZHANG Zhaoqian ZHENG Jiandong WANG Chunyan ZHU Jianhua WANG Wenjuan GAO Jifeng Application of NMR Logging in the Evaluation of Gulong Shale Oil Cejing jishu gulong shale oil nuclear magnetic resonance (nmr) logging porosity oil saturation 2d nmr |
| title | Application of NMR Logging in the Evaluation of Gulong Shale Oil |
| title_full | Application of NMR Logging in the Evaluation of Gulong Shale Oil |
| title_fullStr | Application of NMR Logging in the Evaluation of Gulong Shale Oil |
| title_full_unstemmed | Application of NMR Logging in the Evaluation of Gulong Shale Oil |
| title_short | Application of NMR Logging in the Evaluation of Gulong Shale Oil |
| title_sort | application of nmr logging in the evaluation of gulong shale oil |
| topic | gulong shale oil nuclear magnetic resonance (nmr) logging porosity oil saturation 2d nmr |
| url | https://www.cnpcwlt.com/#/digest?ArticleID=5573 |
| work_keys_str_mv | AT chenlongchuan applicationofnmrloggingintheevaluationofgulongshaleoil AT zhangzhaoqian applicationofnmrloggingintheevaluationofgulongshaleoil AT zhengjiandong applicationofnmrloggingintheevaluationofgulongshaleoil AT wangchunyan applicationofnmrloggingintheevaluationofgulongshaleoil AT zhujianhua applicationofnmrloggingintheevaluationofgulongshaleoil AT wangwenjuan applicationofnmrloggingintheevaluationofgulongshaleoil AT gaojifeng applicationofnmrloggingintheevaluationofgulongshaleoil |