Numerical Investigation of Influence of Fluid Rate, Fluid Viscosity, Perforation Angle and NF on HF Re-Orientation in Heterogeneous Rocks Using UDEC T-W Method
Numerical simulation is very useful for understanding the hydraulic fracture (HF) re-orientation mechanism from artificial weaknesses. In this paper, the UDEC T-W (Trigon–Weibull distribution) modeling method is adopted to simulate the hydraulic fracturing process in heterogeneous rocks. First, the...
| Main Authors: | , , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2022-02-01
|
| Series: | Machines |
| Subjects: | |
| Online Access: | https://www.mdpi.com/2075-1702/10/2/152 |
| _version_ | 1797478576702881792 |
|---|---|
| author | Shuai Zhang Jinhai Xu Liang Chen Mingwei Zhang Takashi Sasaoka Hideki Shimada Haiyang He |
| author_facet | Shuai Zhang Jinhai Xu Liang Chen Mingwei Zhang Takashi Sasaoka Hideki Shimada Haiyang He |
| author_sort | Shuai Zhang |
| collection | DOAJ |
| description | Numerical simulation is very useful for understanding the hydraulic fracture (HF) re-orientation mechanism from artificial weaknesses. In this paper, the UDEC T-W (Trigon–Weibull distribution) modeling method is adopted to simulate the hydraulic fracturing process in heterogeneous rocks. First, the reliability of this method is validated against previous laboratory experiments and numerical simulations. Then the effects of fluid rate, fluid viscosity, perforation angle and natural fracture (NF) on the HF re-orientation process in heterogeneous rocks are studied independently. The results show that the HF re-orientation process depends on the combined effect of these factors. The HF re-orientation distance increases significantly, the final HF re-orientation trajectory becomes more complex and the guiding effect of perforation on the HF propagation path is more evident with the increase of fluid rate, fluid viscosity, and perforation angle if the hydraulic fracturing is performed in relatively heterogeneous rocks, while the differential stress is the main influencing factor and is more likely to dictate the HF propagation path if the rocks become relatively homogeneous. However, increasing the fluid viscosity and fluid rate can attenuate the impact of differential stress and can promote HF propagation along the perforation direction. Besides, NFs are also the important factor affecting HF re-orientation and induce secondary HF re-orientation in some cases in heterogeneous rocks. |
| first_indexed | 2024-03-09T21:33:57Z |
| format | Article |
| id | doaj.art-dedc59e3804f4084b870837235b0d39a |
| institution | Directory Open Access Journal |
| issn | 2075-1702 |
| language | English |
| last_indexed | 2024-03-09T21:33:57Z |
| publishDate | 2022-02-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Machines |
| spelling | doaj.art-dedc59e3804f4084b870837235b0d39a2023-11-23T20:49:04ZengMDPI AGMachines2075-17022022-02-0110215210.3390/machines10020152Numerical Investigation of Influence of Fluid Rate, Fluid Viscosity, Perforation Angle and NF on HF Re-Orientation in Heterogeneous Rocks Using UDEC T-W MethodShuai Zhang0Jinhai Xu1Liang Chen2Mingwei Zhang3Takashi Sasaoka4Hideki Shimada5Haiyang He6State Key Laboratory of Coal Resources and Safe Mining, China University of Mining and Technology, Xuzhou 221116, ChinaState Key Laboratory of Coal Resources and Safe Mining, China University of Mining and Technology, Xuzhou 221116, ChinaState Key Laboratory of Coal Resources and Safe Mining, China University of Mining and Technology, Xuzhou 221116, ChinaState Key Laboratory for Geomechanics and Deep Underground Engineering, China University of Mining and Technology, Xuzhou 221116, ChinaDepartment of Earth Resources Engineering, Faculty of Engineering, Kyushu University, 744 Motooka, Nishi-ku, Fukuoka 819-0395, JapanDepartment of Earth Resources Engineering, Faculty of Engineering, Kyushu University, 744 Motooka, Nishi-ku, Fukuoka 819-0395, JapanState Key Laboratory of Coal Resources and Safe Mining, China University of Mining and Technology, Xuzhou 221116, ChinaNumerical simulation is very useful for understanding the hydraulic fracture (HF) re-orientation mechanism from artificial weaknesses. In this paper, the UDEC T-W (Trigon–Weibull distribution) modeling method is adopted to simulate the hydraulic fracturing process in heterogeneous rocks. First, the reliability of this method is validated against previous laboratory experiments and numerical simulations. Then the effects of fluid rate, fluid viscosity, perforation angle and natural fracture (NF) on the HF re-orientation process in heterogeneous rocks are studied independently. The results show that the HF re-orientation process depends on the combined effect of these factors. The HF re-orientation distance increases significantly, the final HF re-orientation trajectory becomes more complex and the guiding effect of perforation on the HF propagation path is more evident with the increase of fluid rate, fluid viscosity, and perforation angle if the hydraulic fracturing is performed in relatively heterogeneous rocks, while the differential stress is the main influencing factor and is more likely to dictate the HF propagation path if the rocks become relatively homogeneous. However, increasing the fluid viscosity and fluid rate can attenuate the impact of differential stress and can promote HF propagation along the perforation direction. Besides, NFs are also the important factor affecting HF re-orientation and induce secondary HF re-orientation in some cases in heterogeneous rocks.https://www.mdpi.com/2075-1702/10/2/152UDEC T-W methodfluid ratefluid viscosityperforation anglenatural fractureHF re-orientation |
| spellingShingle | Shuai Zhang Jinhai Xu Liang Chen Mingwei Zhang Takashi Sasaoka Hideki Shimada Haiyang He Numerical Investigation of Influence of Fluid Rate, Fluid Viscosity, Perforation Angle and NF on HF Re-Orientation in Heterogeneous Rocks Using UDEC T-W Method Machines UDEC T-W method fluid rate fluid viscosity perforation angle natural fracture HF re-orientation |
| title | Numerical Investigation of Influence of Fluid Rate, Fluid Viscosity, Perforation Angle and NF on HF Re-Orientation in Heterogeneous Rocks Using UDEC T-W Method |
| title_full | Numerical Investigation of Influence of Fluid Rate, Fluid Viscosity, Perforation Angle and NF on HF Re-Orientation in Heterogeneous Rocks Using UDEC T-W Method |
| title_fullStr | Numerical Investigation of Influence of Fluid Rate, Fluid Viscosity, Perforation Angle and NF on HF Re-Orientation in Heterogeneous Rocks Using UDEC T-W Method |
| title_full_unstemmed | Numerical Investigation of Influence of Fluid Rate, Fluid Viscosity, Perforation Angle and NF on HF Re-Orientation in Heterogeneous Rocks Using UDEC T-W Method |
| title_short | Numerical Investigation of Influence of Fluid Rate, Fluid Viscosity, Perforation Angle and NF on HF Re-Orientation in Heterogeneous Rocks Using UDEC T-W Method |
| title_sort | numerical investigation of influence of fluid rate fluid viscosity perforation angle and nf on hf re orientation in heterogeneous rocks using udec t w method |
| topic | UDEC T-W method fluid rate fluid viscosity perforation angle natural fracture HF re-orientation |
| url | https://www.mdpi.com/2075-1702/10/2/152 |
| work_keys_str_mv | AT shuaizhang numericalinvestigationofinfluenceoffluidratefluidviscosityperforationangleandnfonhfreorientationinheterogeneousrocksusingudectwmethod AT jinhaixu numericalinvestigationofinfluenceoffluidratefluidviscosityperforationangleandnfonhfreorientationinheterogeneousrocksusingudectwmethod AT liangchen numericalinvestigationofinfluenceoffluidratefluidviscosityperforationangleandnfonhfreorientationinheterogeneousrocksusingudectwmethod AT mingweizhang numericalinvestigationofinfluenceoffluidratefluidviscosityperforationangleandnfonhfreorientationinheterogeneousrocksusingudectwmethod AT takashisasaoka numericalinvestigationofinfluenceoffluidratefluidviscosityperforationangleandnfonhfreorientationinheterogeneousrocksusingudectwmethod AT hidekishimada numericalinvestigationofinfluenceoffluidratefluidviscosityperforationangleandnfonhfreorientationinheterogeneousrocksusingudectwmethod AT haiyanghe numericalinvestigationofinfluenceoffluidratefluidviscosityperforationangleandnfonhfreorientationinheterogeneousrocksusingudectwmethod |