Application of 2D NMR Component Definition Method in Complex Shale Reservoir Evaluation
The core and experimental data in Qigequan-Shibei slope area of the Qaidam basin show that the E32 formation has the characteristics of complex lithology and rapid vertical variation, and its logging response characteristics are quite different from those of conventional reservoirs. This kind of res...
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Editorial Office of Well Logging Technology
2024-04-01
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| Series: | Cejing jishu |
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| Online Access: | https://www.cnpcwlt.com/#/digest?ArticleID=5584 |
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| author | GAO Shufang ZHANG Xiaoqiu LI Guimei CHEN Wenan LIANG Xiaoyu GUO Ya'nan LI Qingbo WEI Guo |
| author_facet | GAO Shufang ZHANG Xiaoqiu LI Guimei CHEN Wenan LIANG Xiaoyu GUO Ya'nan LI Qingbo WEI Guo |
| author_sort | GAO Shufang |
| collection | DOAJ |
| description | The core and experimental data in Qigequan-Shibei slope area of the Qaidam basin show that the E32 formation has the characteristics of complex lithology and rapid vertical variation, and its logging response characteristics are quite different from those of conventional reservoirs. This kind of reservoir has the characteristics of oil and water flowing together, and it is an urgent problem to accurately identify the fluid properties in well log evaluation. Due to the influence of lithology, physical properties and pore structure, conventional fluid identification methods, such as acoustic time difference and deep induction resistivity crossplot method, have limitations in the identification of such reservoir fluids. Two-dimensional nuclear magnetic resonance (2D NMR) and conventional logging are used to determine the fluid types of each component, that is, types of fluid components in large pores are determined by drawing the crossplot of deep induction resistivity and total water pore volume. This method is applied to determine the reservoir fluid properties of W2 well, a newly drilled well in the Qigequan-Shibei slope area of the Qaidam basin. We selected the perforated well segment for oil testing, and the oil production per day is 13 m3, which proved the applicability of this method in this type of reservoir. The new method overcomes the shortcomings of the original 2D NMR component definition method in fluid identification, and improves the accuracy of fluid identification in complex shale reservoirs. At the same time, this method can also be used for reference to other types of 2D NMR component definition. |
| format | Article |
| id | doaj-art-cbd41f4fb59a4437918a0804b3a7dad6 |
| institution | OA Journals |
| issn | 1004-1338 |
| language | zho |
| publishDate | 2024-04-01 |
| publisher | Editorial Office of Well Logging Technology |
| record_format | Article |
| series | Cejing jishu |
| spelling | doaj-art-cbd41f4fb59a4437918a0804b3a7dad62025-08-20T02:33:23ZzhoEditorial Office of Well Logging TechnologyCejing jishu1004-13382024-04-0148221522010.16489/j.issn.1004-1338.2024.02.0091004-1338(2024)02-0215-06Application of 2D NMR Component Definition Method in Complex Shale Reservoir EvaluationGAO Shufang0ZHANG Xiaoqiu1LI Guimei2CHEN Wenan3LIANG Xiaoyu4GUO Ya'nan5LI Qingbo6WEI Guo7Research Institution of Exploration and Development, PetroChina Qinghai Oilfield Company, Dunhuang, Gansu 736202, ChinaResearch Institution of Exploration and Development, PetroChina Qinghai Oilfield Company, Dunhuang, Gansu 736202, ChinaResearch Institution of Exploration and Development, PetroChina Qinghai Oilfield Company, Dunhuang, Gansu 736202, ChinaResearch Institution of Exploration and Development, PetroChina Qinghai Oilfield Company, Dunhuang, Gansu 736202, ChinaResearch Institution of Exploration and Development, PetroChina Qinghai Oilfield Company, Dunhuang, Gansu 736202, ChinaResearch Institution of Exploration and Development, PetroChina Qinghai Oilfield Company, Dunhuang, Gansu 736202, ChinaResearch Institution of Exploration and Development, PetroChina Qinghai Oilfield Company, Dunhuang, Gansu 736202, ChinaBeijing Huankechuangji Technology Company, Beijing 100020, ChinaThe core and experimental data in Qigequan-Shibei slope area of the Qaidam basin show that the E32 formation has the characteristics of complex lithology and rapid vertical variation, and its logging response characteristics are quite different from those of conventional reservoirs. This kind of reservoir has the characteristics of oil and water flowing together, and it is an urgent problem to accurately identify the fluid properties in well log evaluation. Due to the influence of lithology, physical properties and pore structure, conventional fluid identification methods, such as acoustic time difference and deep induction resistivity crossplot method, have limitations in the identification of such reservoir fluids. Two-dimensional nuclear magnetic resonance (2D NMR) and conventional logging are used to determine the fluid types of each component, that is, types of fluid components in large pores are determined by drawing the crossplot of deep induction resistivity and total water pore volume. This method is applied to determine the reservoir fluid properties of W2 well, a newly drilled well in the Qigequan-Shibei slope area of the Qaidam basin. We selected the perforated well segment for oil testing, and the oil production per day is 13 m3, which proved the applicability of this method in this type of reservoir. The new method overcomes the shortcomings of the original 2D NMR component definition method in fluid identification, and improves the accuracy of fluid identification in complex shale reservoirs. At the same time, this method can also be used for reference to other types of 2D NMR component definition.https://www.cnpcwlt.com/#/digest?ArticleID=5584log interpretationcomplex reservoirshale reservoirfluid identificationnuclear magnetic resonance loggingt1—t2 spectrumqiadam basin |
| spellingShingle | GAO Shufang ZHANG Xiaoqiu LI Guimei CHEN Wenan LIANG Xiaoyu GUO Ya'nan LI Qingbo WEI Guo Application of 2D NMR Component Definition Method in Complex Shale Reservoir Evaluation Cejing jishu log interpretation complex reservoir shale reservoir fluid identification nuclear magnetic resonance logging t1—t2 spectrum qiadam basin |
| title | Application of 2D NMR Component Definition Method in Complex Shale Reservoir Evaluation |
| title_full | Application of 2D NMR Component Definition Method in Complex Shale Reservoir Evaluation |
| title_fullStr | Application of 2D NMR Component Definition Method in Complex Shale Reservoir Evaluation |
| title_full_unstemmed | Application of 2D NMR Component Definition Method in Complex Shale Reservoir Evaluation |
| title_short | Application of 2D NMR Component Definition Method in Complex Shale Reservoir Evaluation |
| title_sort | application of 2d nmr component definition method in complex shale reservoir evaluation |
| topic | log interpretation complex reservoir shale reservoir fluid identification nuclear magnetic resonance logging t1—t2 spectrum qiadam basin |
| url | https://www.cnpcwlt.com/#/digest?ArticleID=5584 |
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