Article
Engineering, Multidisciplinary
Fang Shi, Daobing Wang, Xiaogang Chen
Summary: The study investigates the behavior and propagation mechanisms of hydraulic fractures in fracture-cavity reservoirs, finding that factors such as lateral stress coefficient, confining stress, in-situ stress difference, fluid viscosity, and fluid pumping rate all play a role in shaping the fracture path. Frictional natural fractures connected to cavities significantly alter stress distribution, causing hydraulic fractures to deviate from their original direction. Natural cavities between adjacent fracturing stages have a significant impact on stress distribution, leading to irregular fracture propagation paths.
CMES-COMPUTER MODELING IN ENGINEERING & SCIENCES
(2021)
Article
Computer Science, Interdisciplinary Applications
A. R. Khoei, S. M. S. Mortazavi, L. Simoni, B. A. Schrefler
Summary: There is evidence that fracture advancement in porous media can be smooth or stepwise, with pressure oscillations in saturated porous materials. The behavior is influenced by problem specifications and material properties, and not all numerical models can capture stepwise behavior. Cohesive models can model this behavior by satisfying a consistency condition for the numerical solution. Inhomogeneous media can exhibit irregular results in hydraulic fracturing, but the study shows that homogeneous media can also show such behavior. The extent of irregularity depends on the dynamic effects in the problem, and fracture forerunning contributes to stepwise fracture growth.
COMPUTERS AND GEOTECHNICS
(2023)
Article
Energy & Fuels
Zhongzheng Tian, Zhuang Xiong, Yuhua Wei, Shou Ma, Xiaodong Hu
Summary: Coalbed methane, an unconventional oil and gas resource, is a key focus of exploration worldwide, and hydraulic fracturing is crucial for its efficient stimulation. However, due to the heterogeneity and natural fractures in deep coal seam reservoirs, accurately capturing the complex fracture propagation path is challenging. This study proposes a hydraulic fracture propagation simulation method using ABAQUS Software and a fluid-solid coupled finite element model with a cohesive zone model. The model's accuracy is verified using Blanton's experiment criterion and is used to simulate the impact of various factors on the hydraulic fracture propagation behavior. The study aims to enhance understanding of the mechanism of hydraulic fracture propagation in deep coal seams and provide guidance for fracturing design.
ENERGY SCIENCE & ENGINEERING
(2023)
Article
Energy & Fuels
Bo Wang, Fujian Zhou, Hang Zhou, Hui Ge, Lizhe Li
Summary: Near-wellbore diverting fracturing (NWDF) can generate new diverting fractures and enhance stimulation effects for vertical wells. A fully fluid-solid coupling model was established to simulate NWDF process under various parameters, with key methods including XFEM for arbitrary fracture propagation, cohesive zone model for fracture tip elements, truss model for proppants, and plug model for plugging effects. Stimulation effects can be improved by selecting wells with specific characteristics and optimizing injection rates during field operations.
Article
Mechanics
Rossana Dimitri, Martina Rinaldi, Marco Trullo, Francesco Tornabene, Corrado Fidelibus
Summary: This paper investigates the mechanical properties of elements in the lithosphere, using Finite Element Method and eXtended Finite Element Method to address the fracturing problem in Opalinus Clay (OPA) formation. The approaches are successfully compared despite the complex nonlinear nature of the problem.
COMPOSITE STRUCTURES
(2021)
Article
Engineering, Chemical
Qiquan Ran, Xin Zhou, Jiaxin Dong, Mengya Xu, Dianxing Ren, Ruibo Li
Summary: This study establishes a multi-hydraulic fracturing propagation model that considers rock damage, stress, and fluid flow, using the extended finite element method. The effects of horizontal stress difference and cluster spacing on fracture propagation are quantitatively analyzed. The results show that changes in stress difference and inter-cluster spacing significantly influence the final morphology of hydraulic fractures. The study also provides insights into the impact of inter-fracture interference on fracture propagation morphology.
Article
Engineering, Chemical
Qiquan Ran, Xin Zhou, Jiaxin Dong, Mengya Xu, Dianxing Ren, Ruibo Li
Summary: Multi-horizontal well hydraulic fracturing is a widely employed and highly effective method for stimulating tight and shale reservoirs. However, most existing studies primarily focus on investigating the impact of intra-well interference on fracture propagation while neglecting the influence of inter-well interference. This study establishes a multi-well hydraulic fracture propagation model to examine the effects of inter-well interference on fracture propagation within a multi-well system.
Article
Chemistry, Multidisciplinary
Yiwei Liu, Yi Hu, Yong Kang
Summary: This work investigates the influence of natural fractures on the simulation treatment of a fracture network, specifically focusing on the propagation of hydraulic fractures. The study finds that hydraulic fracture tips are attracted by local natural fractures when the horizontal stress difference is low, and that bifurcations and secondary fractures occur at the intersections of natural fractures. The overall trend of fracture propagation is limited by the presence of natural fractures.
APPLIED SCIENCES-BASEL
(2022)
Article
Computer Science, Interdisciplinary Applications
Yun Zhou, Diansen Yang
Summary: In this paper, a fast simulation method based on fully coupled XFEM is proposed to address the low efficiency and poor convergence in simulating the generation of complex fracture networks. The superiority of the proposed model in computational efficiency is demonstrated through numerical validation and analysis of several cases. The influence of key factors on the propagation of hydraulic fracture is investigated.
COMPUTERS AND GEOTECHNICS
(2022)
Article
Engineering, Geological
Haoyu Zhang, Junbin Chen, Ziyan Li, Heng Hu, Yu Mei
Summary: This study investigates the evolution of the fracture network in quasi-brittle shale reservoirs during multi-cluster fracturing. The research highlights the importance of considering the non-homogeneity and complexity of real rocks in hydraulic fracturing simulations. The findings show that increasing the number of clusters or reducing the perforation diameter can improve the stimulated reservoir volume (SRV).
ROCK MECHANICS AND ROCK ENGINEERING
(2023)
Article
Geosciences, Multidisciplinary
Huan Zhao, Wei Li, Lei Wang, Jing Fu, Yun Long Xue, Jian Jun Zhu, Si Qi Li
Summary: Natural fractures have a significant impact on the hydraulic fracturing process in unconventional reservoirs. Research has shown that the propagation paths of hydraulic fractures in fractured reservoirs are highly complex and can exhibit steering, branching, and merging. The size and distribution of natural fractures play an important role in determining the fracture propagation patterns.
FRONTIERS IN EARTH SCIENCE
(2022)
Article
Energy & Fuels
Yongquan Hu, Qiang Wang, Jinzhou Zhao, Shengnan Chen, Daiqiang Li, Rui Xu, Chaoneng Zhao
Summary: This study establishes three shale models with pre-existing weak planes based on real shale outcrops, and uses a global embedded 3D cohesive zone model to simulate hydraulic fracture geometry. The effects of various factors on fracture geometry and stimulated reservoir volume are analyzed, providing valuable insights for shale development.
JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING
(2021)
Article
Engineering, Chemical
Jian Zou, Ying Zhang, Liping Zhang, Jiyun Jing, Yangyang Fu, Yunjin Wang, Guchang Zhang, Fujian Zhou
Summary: Hydraulic fracturing is widely used in the development of low-permeability and ultra-low-permeability reservoirs. However, poor barriers can result in fractures that do not reach the desired length. To improve efficiency, artificial barriers can be used to control fracture height.
Article
Mechanics
Konstantinos Nikolakopoulos, Jean-Philippe Crete, Patrice Longere
Summary: This study develops a unified 3D numerical methodology for predicting the current residual strength of large metallic engineering structures under accidental overloads. The methodology combines the GTN model and XFEM/CZM coupling, showing promising results in reproducing ductile crack patterns and global specimen responses.
ENGINEERING FRACTURE MECHANICS
(2021)
Article
Mechanics
Konstantinos Nikolakopoulos, Jean-Philippe Crete, Patrice Longere
Summary: This study presents a unified 3D numerical methodology for predicting the current residual strength of large metallic engineering structures under accidental overloads. The methodology reproduces the progressive failure stages of ductile metal structures using the GTN model and XFEM/CZM coupling, and includes a transition criterion to account for competition between different types of localization. The performance of the methodology is evaluated through 3D numerical simulations of various loading cases, showing accurate ductile crack patterns and promising global specimen responses.
ENGINEERING FRACTURE MECHANICS
(2021)
Article
Engineering, Geological
Wencheng Jin, Hao Xu, Chloe Arson, Seth Busetti
INTERNATIONAL JOURNAL FOR NUMERICAL AND ANALYTICAL METHODS IN GEOMECHANICS
(2017)
Article
Materials Science, Multidisciplinary
Wencheng Jin, Chloe Arson
INTERNATIONAL JOURNAL OF DAMAGE MECHANICS
(2018)
Article
Computer Science, Interdisciplinary Applications
Wencheng Jin, Chloe Arson
COMPUTERS AND GEOTECHNICS
(2018)
Article
Mechanics
Wencheng Jin, Chloe Arson
INTERNATIONAL JOURNAL OF SOLIDS AND STRUCTURES
(2018)
Article
Engineering, Multidisciplinary
Wencheng Jin, Chloe Arson
COMPUTER METHODS IN APPLIED MECHANICS AND ENGINEERING
(2019)
Article
Engineering, Chemical
Wencheng Jin, Jordan L. Klinger, Tyler L. Westover, Hai Huang
Review
Chemistry, Multidisciplinary
Yidong Xia, Jonathan J. Stickel, Wencheng Jin, Jordan Klinger
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
(2020)
Review
Chemistry, Multidisciplinary
Wencheng Jin, Jonathan J. Stickel, Yidong Xia, Jordan Klinger
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
(2020)
Article
Multidisciplinary Sciences
Wencheng Jin, Jayde Aufrecht, Fernando Patino-Ramirez, Heidy Cabral, Chloe Arson, Scott T. Retterer
SCIENTIFIC REPORTS
(2020)
Article
Engineering, Chemical
Yimin Lu, Wencheng Jin, Jordan Klinger, Tyler L. Westover, Sheng Dai
Summary: This study presents a workflow to characterize the flow behavior of compressible biomass material and demonstrates the need for large strain experiments to accurately capture granular flow characteristics. The developed numerical models can predict the flow behavior of compressible biomass material, providing a powerful tool for resolving material handling challenges in biorefineries and energy industries that use forest products.
Article
Chemistry, Multidisciplinary
Yimin Lu, Wencheng Jin, Jordan Klinger, Sheng Dai
Summary: The study focuses on the flow behavior of loblolly pine chips in a wedge-shaped hopper, investigating how material attributes and operational parameters affect flow response. The results show that hopper outlet width linearly controls mass flow rate, while hopper inclination angle controls critical outlet size. Packing determines flow smoothness, while surcharge-induced compaction creates flow impedance.
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
(2021)
Article
Chemistry, Multidisciplinary
Yimin Lu, Wencheng Jin, Nepu Saha, Jordan Lee Klinger, Yidong Xia, Sheng Dai
Summary: This study investigates the flow behaviors of milled biomass in hoppers, and examines the influence of critical parameters on flow pattern, arching, and throughput. The findings provide guidance for industrial equipment design in the bioenergy industry.
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
(2022)
Article
Engineering, Chemical
Yumeng Zhao, Wencheng Jin, Jordan Klinger, David C. Dayton, Sheng Dai
Summary: In this study, a GPU-accelerated meshless SPH code is proposed to model the flow of granular biomass materials. The code incorporates a modified void ratio-based mass conversation, a hybrid particle-to-particle/surface frictional boundary treatment, and a hypoplastic constitutive model. Numerical simulations of four examples show good agreement with analytical and experimental data, validating the accuracy of the SPH code.
Article
Chemistry, Multidisciplinary
Yimin Lu, Wencheng Jin, Jordan Lee Klinger, Sheng Dai
Summary: Handling milled biomass particles in the bioenergy industry poses challenges due to their low density, high aspect ratio, and irregular shape. The presence of water in the inner and inter-particle pores affects flow behavior, but knowledge is limited. This study examines the bulk flow behavior of loblolly pine chips in wedge-shaped hoppers and finds that compressibility and shear resistance increase with moisture content. Hopper flow simulations show a decrease in effective discharge rate with increasing moisture content until the fiber saturation point (FSP), highlighting the importance of quantifying biomass FSP for trouble-free handling in the industry.
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
(2023)