Details
| Originalsprache | Englisch |
|---|---|
| Aufsatznummer | 107247 |
| Fachzeitschrift | Engineering geology |
| Jahrgang | 324 |
| Frühes Online-Datum | 28 Juli 2023 |
| Publikationsstatus | Veröffentlicht - Okt. 2023 |
Abstract
The discrete fracture network (DFN) model is applied for fluid flow and transport simulations in fractured rock masses. In this study, a novel two-dimensional fractal DFN generation method was proposed based on the iterative function system (IFS). To achieve the fine mesh for the DFN model, a refinement technique was presented to remove the short edges and small gaps. Subsequently, the zero-thickness flow cohesive element was inserted at the adjacent edge of elements for the hydraulic fracture modeling. The results indicated that the injection pressure of hydraulic fracture had three phases: Sudden increase, rapid drop-off, and stabilization. Compared with the traditional linear DFN model, the injection pressure evolution and fracture propagation of fractal DFN were significantly affected. In addition, the fracture aperture variation was an important factor influencing hydraulic fracturing in the rock mass. Considering the complexity of the hydraulic fracturing process, the effects of mesh sensitivity and fracture aperture size were also analyzed based on two-dimensional simulation results. This study presents a novel 2D DFN model for an accurate description of fracturing and provides a valuable simulation method for hydraulic fracturing.
ASJC Scopus Sachgebiete
- Erdkunde und Planetologie (insg.)
- Geotechnik und Ingenieurgeologie
- Erdkunde und Planetologie (insg.)
- Geologie
Zitieren
- Standard
- Harvard
- Apa
- Vancouver
- BibTex
- RIS
in: Engineering geology, Jahrgang 324, 107247, 10.2023.
Publikation: Beitrag in Fachzeitschrift › Artikel › Forschung › Peer-Review
}
TY - JOUR
T1 - An IFS-based fractal discrete fracture network for hydraulic fracture behavior of rock mass
AU - Meng, Qingxiang
AU - Xue, Haoyu
AU - Zhuang, Xiaoying
AU - Zhang, Qiang
AU - Zhu, Chun
AU - He, Benguo
AU - Feng, Gan
AU - Rabczuk, Timon
N1 - Funding Information: This study was financially supported by the National Natural Science Foundation of China (Grant Nos. 51709089 ). The authors would also like to thank the valuable suggestions from anonymous reviewers and the journal editor.
PY - 2023/10
Y1 - 2023/10
N2 - The discrete fracture network (DFN) model is applied for fluid flow and transport simulations in fractured rock masses. In this study, a novel two-dimensional fractal DFN generation method was proposed based on the iterative function system (IFS). To achieve the fine mesh for the DFN model, a refinement technique was presented to remove the short edges and small gaps. Subsequently, the zero-thickness flow cohesive element was inserted at the adjacent edge of elements for the hydraulic fracture modeling. The results indicated that the injection pressure of hydraulic fracture had three phases: Sudden increase, rapid drop-off, and stabilization. Compared with the traditional linear DFN model, the injection pressure evolution and fracture propagation of fractal DFN were significantly affected. In addition, the fracture aperture variation was an important factor influencing hydraulic fracturing in the rock mass. Considering the complexity of the hydraulic fracturing process, the effects of mesh sensitivity and fracture aperture size were also analyzed based on two-dimensional simulation results. This study presents a novel 2D DFN model for an accurate description of fracturing and provides a valuable simulation method for hydraulic fracturing.
AB - The discrete fracture network (DFN) model is applied for fluid flow and transport simulations in fractured rock masses. In this study, a novel two-dimensional fractal DFN generation method was proposed based on the iterative function system (IFS). To achieve the fine mesh for the DFN model, a refinement technique was presented to remove the short edges and small gaps. Subsequently, the zero-thickness flow cohesive element was inserted at the adjacent edge of elements for the hydraulic fracture modeling. The results indicated that the injection pressure of hydraulic fracture had three phases: Sudden increase, rapid drop-off, and stabilization. Compared with the traditional linear DFN model, the injection pressure evolution and fracture propagation of fractal DFN were significantly affected. In addition, the fracture aperture variation was an important factor influencing hydraulic fracturing in the rock mass. Considering the complexity of the hydraulic fracturing process, the effects of mesh sensitivity and fracture aperture size were also analyzed based on two-dimensional simulation results. This study presents a novel 2D DFN model for an accurate description of fracturing and provides a valuable simulation method for hydraulic fracturing.
KW - Discrete fracture network
KW - Fractal fracture
KW - Hydraulic fracture
KW - Iterative function system
UR - http://www.scopus.com/inward/record.url?scp=85167599232&partnerID=8YFLogxK
U2 - 10.1016/j.enggeo.2023.107247
DO - 10.1016/j.enggeo.2023.107247
M3 - Article
AN - SCOPUS:85167599232
VL - 324
JO - Engineering geology
JF - Engineering geology
SN - 0013-7952
M1 - 107247
ER -