True triaxial physics simulations and process tests of hydraulic fracturing in the Da’anzhai section of the Sichuan Basin tight oil reservoir
The limestone reservoir of the Da’anzhai section is the main production layer of Jurassic tight oil in central Sichuan, with tight and strongly heterogeneous reservoir rocks. In the early stages, small-scale plug removal and acidification techniques were mainly applied to the dacite section of the r...
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| Format: | Article |
| Language: | English |
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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.2023.1267782/full |
| _version_ | 1797641650810388480 |
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| author | Song Li Song Li Yu Fan Yu Fan Yang Wang Yuanshou Zhao Zefei Lv Zeng Ji Weihua Chen Jian Min Jian Min |
| author_facet | Song Li Song Li Yu Fan Yu Fan Yang Wang Yuanshou Zhao Zefei Lv Zeng Ji Weihua Chen Jian Min Jian Min |
| author_sort | Song Li |
| collection | DOAJ |
| description | The limestone reservoir of the Da’anzhai section is the main production layer of Jurassic tight oil in central Sichuan, with tight and strongly heterogeneous reservoir rocks. In the early stages, small-scale plug removal and acidification techniques were mainly applied to the dacite section of the reservoir. However, using a single conversion method was not suitable for tight reservoirs with underdeveloped fractures. To address this challenge, we conducted large-scale real-world triaxial simulation test system experiments on hydraulic fracture propagation using samples from dense limestone outcrops. The aim was to elucidate the laws of hydraulic fracture propagation in dense limestone oil reservoirs. The L1 well in this area was selected to test the volumetric fracturing technology in order to achieve a breakthrough in test production and the reconstruction technology of the Da’anzhai section of the tight limestone reservoir. The experiments have shown that low stress differences, natural fracture development, and low viscosity slippery water are favorable factors for obtaining complex fracture morphology. In contrast to the construction parameters, the structural properties of the rock are the dominant factors in the formation of complex fracture morphologies. By optimizing the geological dessert and implementing targeted technological measures, bulk fracturing has been proven to be feasible for the dense limestone reservoir in the Da’anzhai section. |
| first_indexed | 2024-03-11T13:48:45Z |
| format | Article |
| id | doaj.art-f5a17e9b1bc7460c96e675480542bc12 |
| institution | Directory Open Access Journal |
| issn | 2296-598X |
| language | English |
| last_indexed | 2024-03-11T13:48:45Z |
| publishDate | 2023-11-01 |
| publisher | Frontiers Media S.A. |
| record_format | Article |
| series | Frontiers in Energy Research |
| spelling | doaj.art-f5a17e9b1bc7460c96e675480542bc122023-11-02T09:48:53ZengFrontiers Media S.A.Frontiers in Energy Research2296-598X2023-11-011110.3389/fenrg.2023.12677821267782True triaxial physics simulations and process tests of hydraulic fracturing in the Da’anzhai section of the Sichuan Basin tight oil reservoirSong Li0Song Li1Yu Fan2Yu Fan3Yang Wang4Yuanshou Zhao5Zefei Lv6Zeng Ji7Weihua Chen8Jian Min9Jian Min10Engineering Technology Research Institute of PetroChina Southwest Oil and Gas Field Company, Chengdu, ChinaNational Energy R&D Center of High Sulfur Gas Exploitation, Guanghan, ChinaEngineering Technology Research Institute of PetroChina Southwest Oil and Gas Field Company, Chengdu, ChinaNational Energy R&D Center of High Sulfur Gas Exploitation, Guanghan, ChinaEngineering Technology Research Institute of PetroChina Southwest Oil and Gas Field Company, Chengdu, ChinaQilin Gas Production Area of the Fourth Oil Production Plant of PetroChina Changqing Oilfield Company, Yulin, ChinaEngineering Technology Research Institute of PetroChina Southwest Oil and Gas Field Company, Chengdu, ChinaEngineering Technology Research Institute of PetroChina Southwest Oil and Gas Field Company, Chengdu, ChinaEngineering Technology Research Institute of PetroChina Southwest Oil and Gas Field Company, Chengdu, ChinaEngineering Technology Research Institute of PetroChina Southwest Oil and Gas Field Company, Chengdu, ChinaNational Energy R&D Center of High Sulfur Gas Exploitation, Guanghan, ChinaThe limestone reservoir of the Da’anzhai section is the main production layer of Jurassic tight oil in central Sichuan, with tight and strongly heterogeneous reservoir rocks. In the early stages, small-scale plug removal and acidification techniques were mainly applied to the dacite section of the reservoir. However, using a single conversion method was not suitable for tight reservoirs with underdeveloped fractures. To address this challenge, we conducted large-scale real-world triaxial simulation test system experiments on hydraulic fracture propagation using samples from dense limestone outcrops. The aim was to elucidate the laws of hydraulic fracture propagation in dense limestone oil reservoirs. The L1 well in this area was selected to test the volumetric fracturing technology in order to achieve a breakthrough in test production and the reconstruction technology of the Da’anzhai section of the tight limestone reservoir. The experiments have shown that low stress differences, natural fracture development, and low viscosity slippery water are favorable factors for obtaining complex fracture morphology. In contrast to the construction parameters, the structural properties of the rock are the dominant factors in the formation of complex fracture morphologies. By optimizing the geological dessert and implementing targeted technological measures, bulk fracturing has been proven to be feasible for the dense limestone reservoir in the Da’anzhai section.https://www.frontiersin.org/articles/10.3389/fenrg.2023.1267782/fulltight oil reservoirDa’anzhaitrue triaxialvolume fracturingtechnology test |
| spellingShingle | Song Li Song Li Yu Fan Yu Fan Yang Wang Yuanshou Zhao Zefei Lv Zeng Ji Weihua Chen Jian Min Jian Min True triaxial physics simulations and process tests of hydraulic fracturing in the Da’anzhai section of the Sichuan Basin tight oil reservoir Frontiers in Energy Research tight oil reservoir Da’anzhai true triaxial volume fracturing technology test |
| title | True triaxial physics simulations and process tests of hydraulic fracturing in the Da’anzhai section of the Sichuan Basin tight oil reservoir |
| title_full | True triaxial physics simulations and process tests of hydraulic fracturing in the Da’anzhai section of the Sichuan Basin tight oil reservoir |
| title_fullStr | True triaxial physics simulations and process tests of hydraulic fracturing in the Da’anzhai section of the Sichuan Basin tight oil reservoir |
| title_full_unstemmed | True triaxial physics simulations and process tests of hydraulic fracturing in the Da’anzhai section of the Sichuan Basin tight oil reservoir |
| title_short | True triaxial physics simulations and process tests of hydraulic fracturing in the Da’anzhai section of the Sichuan Basin tight oil reservoir |
| title_sort | true triaxial physics simulations and process tests of hydraulic fracturing in the da anzhai section of the sichuan basin tight oil reservoir |
| topic | tight oil reservoir Da’anzhai true triaxial volume fracturing technology test |
| url | https://www.frontiersin.org/articles/10.3389/fenrg.2023.1267782/full |
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