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Three-Dimensional Lattice Modeling of Interaction Behavior Between Hydraulic Fractures and Natural Fractures with Varied Morphologies in Hot Dry Rock
The interaction between hydraulic fractures (HFs) and natural fractures (NFs) has long been a prominent focus in reservoir fracturing, particularly in the development of hot dry rock (HDR) reservoirs. Activating existing NFs plays a crucial role in constructing a complex fracture network and enhancing reservoir fracturing effectiveness. This study utilizes the lattice-based method XSite and the smooth joint models (SJMs) to construct granite fracturing models with various combinations of parallel and intersecting NFs and explore the three-dimensional (3D) interaction behavior between fractures. The research findings demonstrate that the variation in the approach angle influences the propagation of HFs through a pair of parallel NFs, which can occur in three ways: no crossing, offset crossing, or direct crossing. As the number of parallel NFs rises, HFs predominantly activate the initially encountered NFs on a large scale, while the activation level of subsequent NFs markedly diminishes. Within a cluster of intersecting fractures, HFs tend to preferentially pass through NFs with the smallest approach angle and suppress the activation of NFs with higher approach angles. Furthermore, the numerical simulation results provide valuable insights into the evolution of breakdown pressure, fracture aperture, principal stress, lattice displacement, and other fracturing outcomes throughout the interaction process. These findings serve as important references for controlling HF propagation and activating NFs in the development of HDR reservoirs.
A fully coupled 3D lattice method is employed to investigate the interaction behavior between hydraulic fractures and multiple natural fractures.
Complex non-planar geometric shapes and aperture evolution of hydraulic fractures are captured when interacting with natural fractures with varied morphologies.
Control mechanisms of hydraulic fracture propagation are thoroughly analyzed concerning the approach angle, quantity, and spatial distribution of natural fractures.
Hydraulic fractures activate natural fractures with low approach angles and suppress those with high approach angles.
Three-Dimensional Lattice Modeling of Interaction Behavior Between Hydraulic Fractures and Natural Fractures with Varied Morphologies in Hot Dry Rock
The interaction between hydraulic fractures (HFs) and natural fractures (NFs) has long been a prominent focus in reservoir fracturing, particularly in the development of hot dry rock (HDR) reservoirs. Activating existing NFs plays a crucial role in constructing a complex fracture network and enhancing reservoir fracturing effectiveness. This study utilizes the lattice-based method XSite and the smooth joint models (SJMs) to construct granite fracturing models with various combinations of parallel and intersecting NFs and explore the three-dimensional (3D) interaction behavior between fractures. The research findings demonstrate that the variation in the approach angle influences the propagation of HFs through a pair of parallel NFs, which can occur in three ways: no crossing, offset crossing, or direct crossing. As the number of parallel NFs rises, HFs predominantly activate the initially encountered NFs on a large scale, while the activation level of subsequent NFs markedly diminishes. Within a cluster of intersecting fractures, HFs tend to preferentially pass through NFs with the smallest approach angle and suppress the activation of NFs with higher approach angles. Furthermore, the numerical simulation results provide valuable insights into the evolution of breakdown pressure, fracture aperture, principal stress, lattice displacement, and other fracturing outcomes throughout the interaction process. These findings serve as important references for controlling HF propagation and activating NFs in the development of HDR reservoirs.
A fully coupled 3D lattice method is employed to investigate the interaction behavior between hydraulic fractures and multiple natural fractures.
Complex non-planar geometric shapes and aperture evolution of hydraulic fractures are captured when interacting with natural fractures with varied morphologies.
Control mechanisms of hydraulic fracture propagation are thoroughly analyzed concerning the approach angle, quantity, and spatial distribution of natural fractures.
Hydraulic fractures activate natural fractures with low approach angles and suppress those with high approach angles.
Three-Dimensional Lattice Modeling of Interaction Behavior Between Hydraulic Fractures and Natural Fractures with Varied Morphologies in Hot Dry Rock
Rock Mech Rock Eng
Wang, Song (author) / Zhang, Luqing (author) / Cong, Lin (author) / Zhou, Jian (author) / Yang, Duoxing (author) / Zhang, Xiufeng (author) / Han, Zhenhua (author)
Rock Mechanics and Rock Engineering ; 58 ; 2971-2998
2025-03-01
28 pages
Article (Journal)
Electronic Resource
English
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