Engineering Failure Analysis最新文献_第6页

Microstructural effect on fracture evolution in spheroidal graphite iron: Numerical analysis

IF 4.4 2区工程技术 Q1 ENGINEERING, MECHANICAL

Engineering Failure Analysis

Pub Date : 2025-03-01 DOI: 10.1016/j.engfailanal.2025.109459

Xingling Luo , Tito Andriollo , Konstantinos P. Baxevanakis , Vadim V. Silberschmidt

Spheroidal graphite iron (SGI) has found extensive application across various engineering sectors thanks to its excellent combination of mechanical properties at elevated temperatures and durability. The morphology of graphite inclusions in SGI has a great effect on its mechanical properties in tension. Despite extensive research, the influence of its microstructure on the fracture behaviour has not been fully investigated. In contrast to previous studies of fracture behaviour, the present work attempts to investigate the relation between graphite morphology and fracture behaviour of SGI by using 2D images (slices) from X-ray tomography (X-CT). In this study, a novel approach based on microstructural simulations is proposed. SGI slices were obtained from X-CT and every fifth image was selected to ensure a balanced representation of the microstructure that neither completely alters the character of the distribution of graphite particles nor significantly changes the fraction of any specific graphite particle. The crack path generated in representative volume elements (RVEs) is used to investigate the effect of graphite particles and depict the crack thickness in 3D. The tensile properties and damage mechanism of finite-element methods are validated from experiments. It was found that large and irregular graphite particles accelerated the crack-initiation process. Besides, the spacing between graphite particles should be as large as possible to enhance the material’s fracture toughness. This research provides an effective way to find optimum arrangements of graphite particles or voids for the design of structural components with increased fracture toughness. The application of micromechanics modelling has the potential to provide new insights useful for the design and manufacture of metal-matrix composites.

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引用次数: 0

Fragility analysis of wind turbine towers under combined wind and seismic loads considering wind-induced fatigue

IF 4.4 2区工程技术 Q1 ENGINEERING, MECHANICAL

Engineering Failure Analysis

Pub Date : 2025-02-28 DOI: 10.1016/j.engfailanal.2025.109472

Jia-Xiang Li , Ling-Peng Wang , Zhuo-Qun Zhang , Chao Zhang , Zhi-Qian Dong

Wind-induced fatigue damage, which is a crucial factor affecting the lifespan of wind turbine towers, is frequently overlooked in fragility analysis of wind turbine towers. Moreover, the effect of bolt slippage on the mechanical properties of lattice-type wind turbine towers is significant, warranting an investigation into its influence on fatigue damage. This paper establishes a wind-seismic fragility analysis framework for wind turbine towers that incorporates wind-induced fatigue damage calculations. First, historical data on the wind speed and wind direction are collected, and a joint probability model of the wind speed and direction is established by the copula function on the basis of the historical data. The wind-induced fatigue damage of the wind turbine tower is then calculated according to this probability model. Subsequently, in the fragility analysis, the structural performance is adjusted according to the results of the fatigue damage calculations, followed by static pushover analysis and dynamic time-history analysis. Ultimately, fragility surfaces and curves are established. To illustrate the application of the framework, a wind turbine tower is selected as a case study, and bolt slippage is considered in the analysis. Comparative analysis is employed to investigate the impact of bolt slippage on the fatigue damage of wind turbine towers. The results reveal that wind fatigue damage significantly affects the fragility of wind turbine towers under combined wind and earthquake loads. Furthermore, the bolt slippage effect exacerbates fatigue damage to wind turbine towers.

{"title":"Fragility analysis of wind turbine towers under combined wind and seismic loads considering wind-induced fatigue","authors":"Jia-Xiang Li , Ling-Peng Wang , Zhuo-Qun Zhang , Chao Zhang , Zhi-Qian Dong","doi":"10.1016/j.engfailanal.2025.109472","DOIUrl":"10.1016/j.engfailanal.2025.109472","url":null,"abstract":"<div><div>Wind-induced fatigue damage, which is a crucial factor affecting the lifespan of wind turbine towers, is frequently overlooked in fragility analysis of wind turbine towers. Moreover, the effect of bolt slippage on the mechanical properties of lattice-type wind turbine towers is significant, warranting an investigation into its influence on fatigue damage. This paper establishes a wind-seismic fragility analysis framework for wind turbine towers that incorporates wind-induced fatigue damage calculations. First, historical data on the wind speed and wind direction are collected, and a joint probability model of the wind speed and direction is established by the copula function on the basis of the historical data. The wind-induced fatigue damage of the wind turbine tower is then calculated according to this probability model. Subsequently, in the fragility analysis, the structural performance is adjusted according to the results of the fatigue damage calculations, followed by static pushover analysis and dynamic time-history analysis. Ultimately, fragility surfaces and curves are established. To illustrate the application of the framework, a wind turbine tower is selected as a case study, and bolt slippage is considered in the analysis. Comparative analysis is employed to investigate the impact of bolt slippage on the fatigue damage of wind turbine towers. The results reveal that wind fatigue damage significantly affects the fragility of wind turbine towers under combined wind and earthquake loads. Furthermore, the bolt slippage effect exacerbates fatigue damage to wind turbine towers.</div></div>","PeriodicalId":11677,"journal":{"name":"Engineering Failure Analysis","volume":"174 ","pages":"Article 109472"},"PeriodicalIF":4.4,"publicationDate":"2025-02-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143552218","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Investigation of a premature failure axle from a road-rail truck under rotary bending fatigue

IF 4.4 2区工程技术 Q1 ENGINEERING, MECHANICAL

Engineering Failure Analysis

Pub Date : 2025-02-28 DOI: 10.1016/j.engfailanal.2025.109464

Pedro R. da Costa , V. Infante , M. Freitas

The present study provides a detailed analysis of an axle from a road-rail truck. The main objective of this work was to characterize a premature axle fracture failure in the context of ongoing derailment investigations. A comprehensive material and macro/micro analysis of the axle fracture was conducted which revealed that the premature failure resulted from rotary bending fatigue. The fatigue fracture occurred specifically in the braking system attachment zone. Microscopy and SEM analysis demonstrated that initiation occurred on the surface of the axle. A combination of critical factors resulted in imposing stress below the fatigue strength and leading to a premature failure of the axle. The determined critical factors were fretting damage, stress induced by tightening, and rotary bending. Through the combination of all identified influential variables, multiple crack initiation sites were detected across the braking system press-fitted regions. Following the forensic examination, a plan was proposed outlining the necessary actions, checks, and tests necessary to correct the existing failure through maintenance and/or establishing the time intervals between axle inspections. Corrective actions were recommended regarding the assembly and regular inspection of the braking system, focusing on the contact pressure region with the axle. The routine inspection should include a thorough examination of the fretting affected region for potential cracks and uneven damage utilizing visual amplifying means and ultrasonic testing.

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引用次数: 0

Failure analysis of weld cracking in wax oil cracking unit

IF 4.4 2区工程技术 Q1 ENGINEERING, MECHANICAL

Engineering Failure Analysis

Pub Date : 2025-02-27 DOI: 10.1016/j.engfailanal.2025.109467

Hongbin Xie , Xianrui Zou , Fangfang Zhang , Xianjing Lu , Fang Zhang , Liuyi Huang , Fengping Zhong , Mao Cheng , Xuebin Wang , Jiabin Liu , Guoping Ling

Pressure piping systems are a crucial component in chemical plants. However, pressure piping and its accessories in chemical plants are exposed to complex service environments, and defects in piping materials and welding further increase the risk of failure. This study analyzes the cracking failure of a drain valve in a paraffin oil cracking unit of a petrochemical enterprise. The location of the crack is the weld between the guide valve and the branch pipe, which is a full-penetration butt joint, employing a welding process of GTAW for the root pass and SMAW for the cover passes. Inspection and analysis revealed that stress concentration caused by defects on the inner wall of the valve, combined with sulfide corrosion in the medium, were the reasons for crack initiation. The cracks propagated under variable loads, and porosity defects in the weld seam and heat-affected zone accelerated the crack propagation rate, ultimately leading to corrosion fatigue failure of the valve. After analyzing the failure mechanism and process, we propose improvement suggestions.

{"title":"Failure analysis of weld cracking in wax oil cracking unit","authors":"Hongbin Xie , Xianrui Zou , Fangfang Zhang , Xianjing Lu , Fang Zhang , Liuyi Huang , Fengping Zhong , Mao Cheng , Xuebin Wang , Jiabin Liu , Guoping Ling","doi":"10.1016/j.engfailanal.2025.109467","DOIUrl":"10.1016/j.engfailanal.2025.109467","url":null,"abstract":"<div><div>Pressure piping systems are a crucial component in chemical plants. However, pressure piping and its accessories in chemical plants are exposed to complex service environments, and defects in piping materials and welding further increase the risk of failure. This study analyzes the cracking failure of a drain valve in a paraffin oil cracking unit of a petrochemical enterprise. The location of the crack is the weld between the guide valve and the branch pipe, which is a full-penetration butt joint, employing a welding process of GTAW for the root pass and SMAW for the cover passes. Inspection and analysis revealed that stress concentration caused by defects on the inner wall of the valve, combined with sulfide corrosion in the medium, were the reasons for crack initiation. The cracks propagated under variable loads, and porosity defects in the weld seam and heat-affected zone accelerated the crack propagation rate, ultimately leading to corrosion fatigue failure of the valve. After analyzing the failure mechanism and process, we propose improvement suggestions.</div></div>","PeriodicalId":11677,"journal":{"name":"Engineering Failure Analysis","volume":"174 ","pages":"Article 109467"},"PeriodicalIF":4.4,"publicationDate":"2025-02-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143552217","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

An Explainable AI approach for detecting failures in air pressure systems

IF 4.4 2区工程技术 Q1 ENGINEERING, MECHANICAL

Engineering Failure Analysis

Pub Date : 2025-02-27 DOI: 10.1016/j.engfailanal.2025.109441

Shawqi Mohammed Farea, Mehmet Emin Mumcuoglu, Mustafa Unel

The Air Pressure System (APS) plays a crucial role in heavy-duty vehicles (HDVs), supplying pressurized air to essential subsystems such as braking and suspension. APS failures normally lead to vehicles being stranded on the road with associated safety and financial risks. Although detecting these failures is essential to prevent such events, the detection trustworthiness is equally important given the high sensitivity of this issue. This paper addresses the problem of APS failure detection using Explainable Boosting Machine (EBM), a highly intelligible and interpretable glass-box model. A dataset of operational driving data from 110 healthy vehicles, without any APS failures, and 30 faulty vehicles, with detected APS failures, was collected. First, essential preprocessing steps were developed to deal with the hierarchical big data and to extract indicative features. The main objective of EBM is to distinguish faulty vehicles from healthy ones based on those features while providing explanations for its decisions. The model succeeded in detecting most of the faulty vehicles with a small proportion of false alarms (roughly 5%); the overall accuracy was 91.4% and the F1 score was 0.80. In addition, the provided explanations were thoroughly investigated to evaluate the validity and trustworthiness of the model decisions. At the same time, the explanations themselves were assessed based on domain knowledge to prove their efficacy and relevance. When compared with a human expert analysis, these explanations highly align with the experts’ knowledge of the APS problem. The proposed methodology is easily adaptable for other time-series predictive maintenance applications across different fields.

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引用次数: 0

Failure analysis of a fractured stainless steel femoral bone plate

IF 4.4 2区工程技术 Q1 ENGINEERING, MECHANICAL

Engineering Failure Analysis

Pub Date : 2025-02-26 DOI: 10.1016/j.engfailanal.2025.109466

Luiza de Brito Fantin, Marcelo Ferreira Moreira, José Marcos Paz de Souza

This study investigated a femoral bone plate that fractured after 6 months of use in a patient who had already experienced a similar implant failure. Chemical analyses, Vickers hardness measurements, and metallographic and fractographic examinations showed that the compression plate was following the chemical and microstructural requirements set by the ISO 5832 standard, and no material or manufacturing defects could be associated with the premature failure of the plate. The fracture occurred on the seventh of the fourteen holes of the plate and the failure mode was identified as bending fatigue. The main fatigue cracks nucleated on the edge of the compression hole and propagated through the plate towards the bone. Finite elements analysis results confirmed that fatigue crack nucleation sites were regions of maximum stress concentration. Lack of bone healing was the most probable cause for the excessive loading of the plate, and the failure might have been prevented with better stabilization of the bone fracture region, although analyses of surgical and post-operative medical procedures were outside the scope of this investigation. Additionally, a brief discussion regarding orthopedic implant failures in Brazil was conducted. By analyzing 25 other failure cases, it was found that most of them are related to the device itself and might have been prevented through a better technical certification process and implant monitoring by the national health regulatory agency.

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引用次数: 0

Load characteristics analysis of the high-speed turnout rail bottom under random factors

IF 4.4 2区工程技术 Q1 ENGINEERING, MECHANICAL

Engineering Failure Analysis

Pub Date : 2025-02-26 DOI: 10.1016/j.engfailanal.2025.109465

Xiaoxue Zhu , Chaojiang Hao , Ce Liang , Taoshuo Bai , Yao Qian , Jingmang Xu , Ping Wang

The fatigue damage occurring at the rail bottom is one of the most common forms of damage observed in high-speed turnout. The dynamic mechanical behaviour of the wheel-rail system and the mechanical properties of the rail material are key factors influencing this fatigue damage. In this paper, a refined high-speed vehicle-frog dynamic interaction analysis model, which takes into account the material properties and complex constraints, was developed. The unreplicated saturated factorial design method was used to identify factors significantly influencing the multi-axial vibration fatigue of the frog. The time domain and frequency domain statistical characteristics of the rail load and rail bottom stress in the frog were then analysed. Additionally, the Gaussianity and stationarity of the random load in the frog were assessed. Using non-parametric kernel density estimation, the load was extrapolated, and a full life cycle load spectrum for the frog rail was developed. Finally, a mapping relationship between the load and rail bottom stress was established.

{"title":"Load characteristics analysis of the high-speed turnout rail bottom under random factors","authors":"Xiaoxue Zhu , Chaojiang Hao , Ce Liang , Taoshuo Bai , Yao Qian , Jingmang Xu , Ping Wang","doi":"10.1016/j.engfailanal.2025.109465","DOIUrl":"10.1016/j.engfailanal.2025.109465","url":null,"abstract":"<div><div>The fatigue damage occurring at the rail bottom is one of the most common forms of damage observed in high-speed turnout. The dynamic mechanical behaviour of the wheel-rail system and the mechanical properties of the rail material are key factors influencing this fatigue damage. In this paper, a refined high-speed vehicle-frog dynamic interaction analysis model, which takes into account the material properties and complex constraints, was developed. The unreplicated saturated factorial design method was used to identify factors significantly influencing the multi-axial vibration fatigue of the frog. The time domain and frequency domain statistical characteristics of the rail load and rail bottom stress in the frog were then analysed. Additionally, the Gaussianity and stationarity of the random load in the frog were assessed. Using non-parametric kernel density estimation, the load was extrapolated, and a full life cycle load spectrum for the frog rail was developed. Finally, a mapping relationship between the load and rail bottom stress was established.</div></div>","PeriodicalId":11677,"journal":{"name":"Engineering Failure Analysis","volume":"173 ","pages":"Article 109465"},"PeriodicalIF":4.4,"publicationDate":"2025-02-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143512010","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Analysis of cascade collapse mechanism and prediction model for determining collapse height of block rock tunnel

IF 4.4 2区工程技术 Q1 ENGINEERING, MECHANICAL

Engineering Failure Analysis

Pub Date : 2025-02-26 DOI: 10.1016/j.engfailanal.2025.109463

Xin Gao , Hongliang Liu , Liping Li , Shangan Li , Hongyun Fan , Shicheng Wang , Hui Cai

Excavation in underground engineering projects, such as tunnels and subterranean caverns, poses significant risks of sudden and destructive collapse. To explore the mechanisms and factors influencing collapse in stratified parallel structure without support, laboratory model tests, numerical simulations, and machine learning techniques have been employed. Five model tests have been utilized to focus on rock mass instability during tunnel construction, using the optical flow method to analyze instability characteristics and coupling effects in block crack tunnels. Model tests on jointed rock evaluates the surrounding rock behavior using the Universal Distinct Element Code, identifying six collapse modes and quantitatively analyzing factors governing collapse height through range analysis method. The ranking of these influential factors is: bedding inclination > tunnel span > joint friction Angle > tunnel buried depth > lateral pressure coefficient > joint spacing > joint cohesion > elastic modulus > Poisson’s ratio. The k-Nearest Neighbor algorithm is employed to develop a stable state prediction model of surrounding rock. One-variable nonlinear and multiple linear regression analyses are performed on influencing factors with a range greater than 1.5, leading to the establishment of a collapse height prediction model. The prediction results achieved over 88 % accuracy when validated against the five laboratory tests. This model was also applied to analyze the Ganggou tunnel collapse on the Beijing-Shanghai Expressway, confirming its effectiveness in predicting collapse heights. The research findings provide valuable insights for predicting, preventing, and managing the stability of surrounding rock during excavation in block fissure areas, offering significant engineering application value.

{"title":"Analysis of cascade collapse mechanism and prediction model for determining collapse height of block rock tunnel","authors":"Xin Gao , Hongliang Liu , Liping Li , Shangan Li , Hongyun Fan , Shicheng Wang , Hui Cai","doi":"10.1016/j.engfailanal.2025.109463","DOIUrl":"10.1016/j.engfailanal.2025.109463","url":null,"abstract":"<div><div>Excavation in underground engineering projects, such as tunnels and subterranean caverns, poses significant risks of sudden and destructive collapse. To explore the mechanisms and factors influencing collapse in stratified parallel structure without support, laboratory model tests, numerical simulations, and machine learning techniques have been employed. Five model tests have been utilized to focus on rock mass instability during tunnel construction, using the optical flow method to analyze instability characteristics and coupling effects in block crack tunnels. Model tests on jointed rock evaluates the surrounding rock behavior using the Universal Distinct Element Code, identifying six collapse modes and quantitatively analyzing factors governing collapse height through range analysis method. The ranking of these influential factors is: bedding inclination > tunnel span > joint friction Angle > tunnel buried depth > lateral pressure coefficient > joint spacing > joint cohesion > elastic modulus > Poisson’s ratio. The k-Nearest Neighbor algorithm is employed to develop a stable state prediction model of surrounding rock. One-variable nonlinear and multiple linear regression analyses are performed on influencing factors with a range greater than 1.5, leading to the establishment of a collapse height prediction model. The prediction results achieved over 88 % accuracy when validated against the five laboratory tests. This model was also applied to analyze the Ganggou tunnel collapse on the Beijing-Shanghai Expressway, confirming its effectiveness in predicting collapse heights. The research findings provide valuable insights for predicting, preventing, and managing the stability of surrounding rock during excavation in block fissure areas, offering significant engineering application value.</div></div>","PeriodicalId":11677,"journal":{"name":"Engineering Failure Analysis","volume":"173 ","pages":"Article 109463"},"PeriodicalIF":4.4,"publicationDate":"2025-02-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143520875","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Progressive failure analysis and fractures space model construction of overlying strata in shallow multi-seam overlapping mining

IF 4.4 2区工程技术 Q1 ENGINEERING, MECHANICAL

Engineering Failure Analysis

Pub Date : 2025-02-25 DOI: 10.1016/j.engfailanal.2025.109462

Kai Wang , Xiang Zhang , Yiqiao Wang , Kangnan Li , Jiazhi Sun , Aitao Zhou , Feng Du , Yangyang Guo

The comprehension of the collapse law of overlying strata and the corresponding evolution of overburden fractures is the foundation for solving mine disasters related to rock mass dynamics and fluid flow in shallow multi-seam mining, and the correlation study is inadequate. In this work, a three-dimensional (3D) model of shallow multi-seam is developed based on discrete element method to simulate the whole process of overlapping mining. The overburden caving, fracture propagation and strata subsidence are investigated from a spatial perspective, and the evolution and distribution of highly fractured areas are assessed. Based on the stability and transformation characteristics of the collapsed overburden structure influenced by geological features and the disturbance of secondary mining, the propagation mechanism of overburden fractures is determined. Additionally, a calculation criteria of overburden collapse and fractures development height in shallow multi-seam mining with separation height as a single judgment factor is proposed. The spatial distribution models of overburden fractures in full mining stage of upper and lower coal seams are established singly, and regions are divided based on the degree of fracturing. Finally, the spatial models of overburden fractures is verified and supplemented by field investigations of morphology and distribution features of surface cracks.

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引用次数: 0

Comprehensive characterization of hydraulic fracture propagations and prevention of pre-existing fault failure in Duvernay shale reservoirs

IF 4.4 2区工程技术 Q1 ENGINEERING, MECHANICAL

Engineering Failure Analysis

Pub Date : 2025-02-25 DOI: 10.1016/j.engfailanal.2025.109461

Penghu Bao , Gang Hui , Yafei Hu , Rui Song , Zhangxin Chen , Ke Zhang , Zhiyang Pi , Ye Li , Chenqi Ge , Fuyu Yao , Yujie Zhang , Fei Gu

Because of the inherent complexity of shale reservoirs and pre-existing natural fractures (NF) and faults, an accurate characterization of hydraulic fracture propagations has not been well investigated. This paper proposed an integrated geoengineering method to comprehensively characterize the non-uniform fracture propagations in shale reservoirs, integrating high-quality three-dimensional (3D) seismic, well-logging, experiments, and microseismicity. The results show that the Duvernay shale is strongly heterogeneous in petrophysics and geomechanics. The Duvernay shale reservoir is controlled by two phases of tectonics, resulting in the development of high-angle natural faults/fractures with average azimuths of NE18° and SE115°. Considering the coupling between NF as well as stress shadowing effects, a full hydro-mechanical coupling model for hydraulic fractures (HF) was developed and restrained by up to 25,000 microseismicity events. Simulated post-frac productivity conforms to the actual productivity by up to 87%, showing the robustness of the unconventional fracture model. The pre-existing faults should be recognized beforehand, and some mitigation strategies can be made to avoid hydraulic communications between hydraulic fractures and pre-existing faults, effectively developing unconventional shale resources.

{"title":"Comprehensive characterization of hydraulic fracture propagations and prevention of pre-existing fault failure in Duvernay shale reservoirs","authors":"Penghu Bao , Gang Hui , Yafei Hu , Rui Song , Zhangxin Chen , Ke Zhang , Zhiyang Pi , Ye Li , Chenqi Ge , Fuyu Yao , Yujie Zhang , Fei Gu","doi":"10.1016/j.engfailanal.2025.109461","DOIUrl":"10.1016/j.engfailanal.2025.109461","url":null,"abstract":"<div><div>Because of the inherent complexity of shale reservoirs and pre-existing natural fractures (NF) and faults, an accurate characterization of hydraulic fracture propagations has not been well investigated. This paper proposed an integrated geoengineering method to comprehensively characterize the non-uniform fracture propagations in shale reservoirs, integrating high-quality three-dimensional (3D) seismic, well-logging, experiments, and microseismicity. The results show that the Duvernay shale is strongly heterogeneous in petrophysics and geomechanics. The Duvernay shale reservoir is controlled by two phases of tectonics, resulting in the development of high-angle natural faults/fractures with average azimuths of NE18° and SE115°. Considering the coupling between NF as well as stress shadowing effects, a full hydro-mechanical coupling model for hydraulic fractures (HF) was developed and restrained by up to 25,000 microseismicity events. Simulated post-frac productivity conforms to the actual productivity by up to 87%, showing the robustness of the unconventional fracture model. The pre-existing faults should be recognized beforehand, and some mitigation strategies can be made to avoid hydraulic communications between hydraulic fractures and pre-existing faults, effectively developing unconventional shale resources.</div></div>","PeriodicalId":11677,"journal":{"name":"Engineering Failure Analysis","volume":"173 ","pages":"Article 109461"},"PeriodicalIF":4.4,"publicationDate":"2025-02-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143520872","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0