Fracturing fluid flow characteristics in shale gas matrix-fracture system based on NMR method
To understand the occurrence state of fracturing fluid in shale gas matrix-fracture system, an experimental method for evaluating fracturing fluid flow characteristics in matrix-fracture system was established. By using Nuclear Magnetic Resonance method, the flow characteristics of fracturing fluid...
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| Format: | Article |
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Frontiers Media S.A.
2023-11-01
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| Series: | Frontiers in Energy Research |
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| Online Access: | https://www.frontiersin.org/articles/10.3389/fenrg.2023.1321114/full |
| _version_ | 1797465549799686144 |
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| author | Jianfa Wu Xuefeng Yang Jiajun Li Wenping Liu Feng Chen Shan Huang Chuanxi Wang Yongpeng Sun |
| author_facet | Jianfa Wu Xuefeng Yang Jiajun Li Wenping Liu Feng Chen Shan Huang Chuanxi Wang Yongpeng Sun |
| author_sort | Jianfa Wu |
| collection | DOAJ |
| description | To understand the occurrence state of fracturing fluid in shale gas matrix-fracture system, an experimental method for evaluating fracturing fluid flow characteristics in matrix-fracture system was established. By using Nuclear Magnetic Resonance method, the flow characteristics of fracturing fluid were investigated from three processes of filtration, well shut-in and flowback. The T2 spectrum of fracturing fluid flow process and fracturing fluid saturation in matrix-fracture core model were clarified. The results demonstrate that the peak area of T2 spectra increases gradually during the filtration process, and the fracturing fluid quickly fills the fractures and matrix pores. During the well shut-in process, the fracturing fluid gradually flows from the fracture space to the matrix pores, and the signal of the matrix pores increases by 50.5%. During the flowback process, fracturing fluid flows out of the matrix and fracture. And when it reaches a stable state, the peak signal in the fracture decreases by 64.5% and the matrix signal reduces by 18.8%. The better the porosity and permeability characteristics of the core, the more likely the fracturing fluid is to stay in the formation and cannot be discharged. This paper would contribute to basic parameters for shale gas fracturing design and production strategy optimization. |
| first_indexed | 2024-03-09T18:24:03Z |
| format | Article |
| id | doaj.art-023cb960390e4808affb3d621710e6b5 |
| institution | Directory Open Access Journal |
| issn | 2296-598X |
| language | English |
| last_indexed | 2024-03-09T18:24:03Z |
| publishDate | 2023-11-01 |
| publisher | Frontiers Media S.A. |
| record_format | Article |
| series | Frontiers in Energy Research |
| spelling | doaj.art-023cb960390e4808affb3d621710e6b52023-11-24T08:02:49ZengFrontiers Media S.A.Frontiers in Energy Research2296-598X2023-11-011110.3389/fenrg.2023.13211141321114Fracturing fluid flow characteristics in shale gas matrix-fracture system based on NMR methodJianfa Wu0Xuefeng Yang1Jiajun Li2Wenping Liu3Feng Chen4Shan Huang5Chuanxi Wang6Yongpeng Sun7Shale Gas Research Institute of PetroChina, Southwest Oil&Gas Field Company, Chengdu, Sichuan, ChinaShale Gas Research Institute of PetroChina, Southwest Oil&Gas Field Company, Chengdu, Sichuan, ChinaShale Gas Research Institute of PetroChina, Southwest Oil&Gas Field Company, Chengdu, Sichuan, ChinaPetroChina Southwest Oil&Gas Field Company, Chengdu, Sichuan, ChinaPetroChina Southwest Oil&Gas Field Company, Chengdu, Sichuan, ChinaShale Gas Research Institute of PetroChina, Southwest Oil&Gas Field Company, Chengdu, Sichuan, ChinaKey Laboratory of Unconventional Oil & Gas Development, China University of Petroleum (East China), Ministry of Education, Qingdao, ChinaKey Laboratory of Unconventional Oil & Gas Development, China University of Petroleum (East China), Ministry of Education, Qingdao, ChinaTo understand the occurrence state of fracturing fluid in shale gas matrix-fracture system, an experimental method for evaluating fracturing fluid flow characteristics in matrix-fracture system was established. By using Nuclear Magnetic Resonance method, the flow characteristics of fracturing fluid were investigated from three processes of filtration, well shut-in and flowback. The T2 spectrum of fracturing fluid flow process and fracturing fluid saturation in matrix-fracture core model were clarified. The results demonstrate that the peak area of T2 spectra increases gradually during the filtration process, and the fracturing fluid quickly fills the fractures and matrix pores. During the well shut-in process, the fracturing fluid gradually flows from the fracture space to the matrix pores, and the signal of the matrix pores increases by 50.5%. During the flowback process, fracturing fluid flows out of the matrix and fracture. And when it reaches a stable state, the peak signal in the fracture decreases by 64.5% and the matrix signal reduces by 18.8%. The better the porosity and permeability characteristics of the core, the more likely the fracturing fluid is to stay in the formation and cannot be discharged. This paper would contribute to basic parameters for shale gas fracturing design and production strategy optimization.https://www.frontiersin.org/articles/10.3389/fenrg.2023.1321114/fullshale gasmatrix-fracture systemfracturing fluidoccurrence characteristicsflow behavior |
| spellingShingle | Jianfa Wu Xuefeng Yang Jiajun Li Wenping Liu Feng Chen Shan Huang Chuanxi Wang Yongpeng Sun Fracturing fluid flow characteristics in shale gas matrix-fracture system based on NMR method Frontiers in Energy Research shale gas matrix-fracture system fracturing fluid occurrence characteristics flow behavior |
| title | Fracturing fluid flow characteristics in shale gas matrix-fracture system based on NMR method |
| title_full | Fracturing fluid flow characteristics in shale gas matrix-fracture system based on NMR method |
| title_fullStr | Fracturing fluid flow characteristics in shale gas matrix-fracture system based on NMR method |
| title_full_unstemmed | Fracturing fluid flow characteristics in shale gas matrix-fracture system based on NMR method |
| title_short | Fracturing fluid flow characteristics in shale gas matrix-fracture system based on NMR method |
| title_sort | fracturing fluid flow characteristics in shale gas matrix fracture system based on nmr method |
| topic | shale gas matrix-fracture system fracturing fluid occurrence characteristics flow behavior |
| url | https://www.frontiersin.org/articles/10.3389/fenrg.2023.1321114/full |
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