Article
Energy & Fuels
Hamed Lamei Ramandi, Muhammad Asad Pirzada, Serkan Saydam, Christoph Arns, Hamid Roshan
Summary: Proppant-laden fluid injection in naturally fractured coal samples did not significantly increase permeability due to proppant accumulation at the inlet creating a filter. Digital computation revealed a notable increase in permeability when accumulated proppants were excluded, indicating the importance of proppant size selection for effective hydraulic fracturing in coal seams.
Article
Energy & Fuels
Jianhua Li, Bobo Li, Zhihe Wang, Chonghong Ren, Kang Yang, Zheng Gao
Summary: The study investigated the anisotropic permeability of coal, proposed a permeability model considering different stress conditions, and verified the model using experimental data. Coal permeability is influenced by stress and exhibits strong anisotropy in both magnitude and variation.
JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING
(2021)
Article
Geosciences, Multidisciplinary
Yubing Liu, Enyuan Wang, Changbao Jiang, Dongming Zhang, Minghui Li, Beichen Yu, Dong Zhao
Summary: During deep underground coal mining, the mechanical and permeability characteristics of initially fractured coal were investigated under true triaxial stresses. The results show that initially fractured coal exhibits semi-brittle Class I failure modes and forms new failure planes different from intact coal samples. The peak strength of initially fractured coal is observed when the maximum principal stress is perpendicular to bedding planes, while minimum values occur when the maximum principal stress is parallel to butt cleats. The permeability of initially fractured coal decreases due to the presence of pulverized coal grains.
NATURAL RESOURCES RESEARCH
(2023)
Article
Energy & Fuels
Mingjun Li, Xiangyi Yi, Chengyong Li
Summary: Horizontal wells and fracturing treatment are effective ways to develop coalbed methane reservoirs, however, research on gas flow behavior and pressure distribution in such reservoirs is limited. Mathematical models and type curves were used to analyze the percolation characteristics of multiple-fractured horizontal wells in coalbed methane reservoirs, with important parameters analyzed. The characteristics of coalbed methane reservoirs are more complex than conventional gas reservoirs.
ENERGY SOURCES PART A-RECOVERY UTILIZATION AND ENVIRONMENTAL EFFECTS
(2021)
Article
Engineering, Petroleum
Hao Zhang, James J. Sheng
Summary: This article proposes a novel framework for optimizing the hydraulically fractured well in shale-gas reservoirs with geological uncertainty. It also introduces a hybrid multiobjective particle-swarm optimization algorithm and a Gaussian-process Kriging model as a surrogate model. By applying these methods, the efficiency and accuracy of hydraulic fracturing design can be improved.
Article
Energy & Fuels
Yulong Liu, Dazhen Tang, Hao Xu, Wei Hou, Xia Yan
Summary: Macrolithotypes play a crucial role in controlling the distribution heterogeneity of pores and fractures in coal, thereby affecting stimulation techniques like hydrofracturing and coalbed methane production. It was found that the type of macrolithotype dictates the propagation pattern of hydraulic fractures, with bright coals showing more complex fracture networks compared to dull coals. Numerical simulations revealed that square well patterns are optimal for dull and semi-dull coals, while diamond and rectangular patterns are better suited for semi-bright and bright coals with more developed natural fractures. The spacing of optimal wells also varies depending on the coal macrolithotype, with bright coals requiring a spacing of 300 m and dull coals needing just 200 m.
ENERGY EXPLORATION & EXPLOITATION
(2021)
Article
Engineering, Geological
Peter Ibemesi, Philip Benson
Summary: Hydraulic fracture in deep rock masses is widely used in various fields, and the anisotropy of the rocks affects the fracture pressure and subsequent fluid flow. Increasing the confining pressure often leads to a significant decrease in flow rate through the newly generated fracture, but the flow can recover during a confining pressure re-set.
ROCK MECHANICS AND ROCK ENGINEERING
(2023)
Article
Geosciences, Multidisciplinary
Yubing Liu, Maxim Lebedev, Yihuai Zhang, Enyuan Wang, Wenpu Li, Jiabin Liang, Runhua Feng, Rupeng Ma
Summary: Cleat and permeability in coal play a crucial role in enhanced coalbed methane production and CO2 geo-sequestration. This study used a novel in situ micro-CT core flooding apparatus to observe the closure of micro-cleats in small anthracite coal at different CO2 injection pressures. The results showed that the mean aperture size of the micro-cleat increased and then decreased with increasing injection pressures, with a higher rebound in mean aperture size parallel to cleat directions. The permeability decreased drastically initially and then slowly with an increase in saturation time.
NATURAL RESOURCES RESEARCH
(2022)
Article
Engineering, Geological
Min Chen, Shakil Masum, Sivachidambaram Sadasivam, Hywel Thomas
Summary: This study proposes an effective stress model for investigating the anisotropy of coal swelling in fractured porous media. The model considers the change in stress on the solid-fluid interface induced by gas adsorption. Experimental results show that coal swelling is greater in the direction perpendicular to the bedding plane than in the parallel plane. The evolution of anisotropic stress-dependent permeability behavior is described by direction dependent fracture compressibility. The presented model provides a tool for quantifying gas adsorption-induced anisotropic coal swelling and permeability behaviors.
INTERNATIONAL JOURNAL OF ROCK MECHANICS AND MINING SCIENCES
(2022)
Article
Engineering, Chemical
Katherine L. Hull, Younane N. Abousleiman
Summary: Carbon dioxide (CO2) has been tested as a fracturing fluid, with challenges such as poor solubility and low viscosity. Combining oxidizers with CO2 as an additive shows potential in enhancing permeability of unconventional rock formations, although mineral and organic deposits may also form. This novel approach could contribute to reducing anthropogenic CO2 emissions and improving carbon sequestration in stimulated reservoirs, aligning with global clean energy initiatives.
CANADIAN JOURNAL OF CHEMICAL ENGINEERING
(2022)
Article
Energy & Fuels
Shuaifang Guo, Yunxing Cao, Junsheng Zhang, Xinsheng Zhang, Bingbing Meng, Shimin Liu
Summary: High-pressure CO2 gas fracturing is a novel technology to improve coal-seam permeability and increase gas extraction efficiency. However, the understanding of the pore-microfracture evolution characteristics and damage mechanism induced by CO2-Frac is still limited.
Article
Environmental Sciences
Subhashini Nainar, Suresh Kumar Govindarajan
Summary: Coal reservoir production is influenced by cleat permeability and porosity; stress models are more reliable than strain models, with the new stress-dependent model being closer to actual reservoir conditions.
ENVIRONMENTAL EARTH SCIENCES
(2021)
Review
Energy & Fuels
Chao Xu, Tong Yang, Kai Wang, Qiang Fu, Shihao Ma
Summary: Coalbed methane is a low-carbon and clean energy source, but also a dangerous gas that threatens mine safety. Understanding the development of fractures and gas migration in the coal seam's overlying strata is essential for accurate extraction. Various methods, such as roadway, borehole drilling, and surface drilling, are used for gas extraction in the fractured zone.
Article
Energy & Fuels
Xiangliang Zhang, Baiquan Lin, Jian Shen
Summary: The study found that plasma based on the principle of electrical breakdown can enhance the permeability of loaded coal, with the formation of interconnected fracture networks significantly increasing coal permeability. The changes in flow state from Darcy flow to non-Darcy flow after breakdown also facilitate fluid migration in coal.
Article
Energy & Fuels
Liang Xue, Shao-Hua Gu, Xie-Er Jiang, Yue-Tian Liu, Chen Yang
Summary: An ensemble-based optimization method (EnOpt) is proposed to optimize the design of hydraulically fractured horizontal wells in shale gas reservoirs. The method aims to maximize the net present value (NPV) by predicting cumulative shale gas production through a simulation model. The results show significant improvements in optimizing design parameters and increasing NPV.
Article
Energy & Fuels
Daniel I. O'Reilly, Manouchehr Haghighi, Matthew A. Flett, Mohammad Sayyafzadeh
JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING
(2016)
Article
Energy & Fuels
Tammy Amirian, Manouchehr Haghighi, Peyman Mostaghimi
Article
Chemistry, Multidisciplinary
Yang Fei, Jingyi Zhu, Binyu Xu, Xiaogang Li, Mary Gonzalez, Manouchehr Haghighi
JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
(2017)
Article
Energy & Fuels
Yang Fei, Kunakorn Pokalai, Ray Johnson, Mary Gonzalez, Manouchehr Haghighi
JOURNAL OF NATURAL GAS SCIENCE AND ENGINEERING
(2017)
Article
Energy & Fuels
Yang Fei, Raymond L. Johnson, Mary Gonzalez, Manouchehr Haghighi, Kunakorn Pokalai
Article
Engineering, Multidisciplinary
Xiangchen Li, Yili Kang, Manouchehr Haghighi
Article
Engineering, Petroleum
D. O'Reilly, B. S. Hopcroft, K. A. Nelligan, G. K. Ng, B. H. Goff, M. Haghighi
SPE PRODUCTION & OPERATIONS
(2018)
Article
Geosciences, Multidisciplinary
Zeinab Shariatinia, Manouchehr Haghighi, Ali Shafiei, Sadat Feiznia, Sohrab Zendehboudi
INTERNATIONAL JOURNAL OF EARTH SCIENCES
(2015)
Article
Energy & Fuels
Daniel I. O'Reilly, Manouchehr Haghighi, Matthew A. Flett, Mohammad Sayyafzadeh
JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING
(2019)
Article
Energy & Fuels
Tammy Amirian, Manouchehr Haghighi, Chenhao Sun, Ryan T. Armstrong, Peyman Mostaghimi
Article
Engineering, Geological
Mohammadreza Zare Reisabadi, Manouchehr Haghighi, Alireza Salmachi, Mohammad Sayyafzadeh, Abbas Khaksar
INTERNATIONAL JOURNAL OF ROCK MECHANICS AND MINING SCIENCES
(2020)
Article
Energy & Fuels
Mohammadreza Zare Reisabadi, Manouchehr Haghighi, Mohammad Sayyafzadeh, Abbas Khaksar
JOURNAL OF NATURAL GAS SCIENCE AND ENGINEERING
(2020)
Article
Energy & Fuels
Abbas Movassagh, Manouchehr Haghighi, Xi Zhang, Dane Kasperczyk, Mohammad Sayyafzadeh
Summary: In this study, the surface of an experimentally generated hydraulic fracture was analyzed using a practical fractal approach. The roughness of the fracture surface follows a power-law relation, indicating fractal nature. This suggests that the topology of a hydraulic fracture surface is crucial for assessing fracturing performance.
JOURNAL OF NATURAL GAS SCIENCE AND ENGINEERING
(2021)
Article
Energy & Fuels
Mohammadreza Zare Reisabadi, Manouchehr Haghighi, Mohammad Sayyafzadeh, Abbas Khaksar
Summary: In this study, a mathematical model was developed to evaluate the dynamic stress distribution and permeability changes in coal by considering the desorption area and non-desorption area. The results indicate that the desorption radius has a significant effect on stress distribution in the coalbed.
Article
Computer Science, Artificial Intelligence
Shahdad Ghassemzadeh, Maria Gonzalez Perdomo, Manouchehr Haghighi, Ehsan Abbasnejad
Summary: Physics-based reservoir simulation, while critical in the oil and gas industry, can be time-intensive and challenging to update in real time due to computational demands. In this study, a data-driven simulator using deep learning was developed, showing significantly faster and more accurate results for simulating multiple reservoirs compared to traditional methods.
NEURAL COMPUTING & APPLICATIONS
(2021)
Article
Energy & Fuels
Yingna Du, Chen Huang, Wei Jiang, Qiangwei Yan, Yongfei Li, Gang Chen
Summary: In this study, anionic surfactants modified hydrotalcite was used as a flow improver for crude oil under low-temperature conditions. The modified hydrotalcite showed a significant viscosity reduction effect on crude oil. The mechanism of the modified hydrotalcite on viscosity and pour point of crude oil was explored through characterization and analysis of the modified hydrotalcite and oil samples.
Article
Energy & Fuels
Mohammad Saeid Rostami, Mohammad Mehdi Khodaei
Summary: In this study, a hybrid structure, MIL-53(Al)@MWCNT, was synthesized by combining MIL-53(Al) particles and -COOH functionalized multi-walled carbon nanotube (MWCNT). The hybrid structure was then embedded in a polyethersulfone (PES) polymer matrix to prepare a mixed matrix membrane (MMM) for CO2/CH4 and CO2/N2 separation. The addition of MWCNTs prevented MIL-53(Al) aggregation, improved membrane mechanical properties, and enhanced gas separation efficiency.
Article
Energy & Fuels
Yunlong Li, Desheng Huang, Xiaomeng Dong, Daoyong Yang
Summary: This study develops theoretical and experimental techniques to determine the phase behavior and physical properties of DME/flue gas/water/heavy oil systems. Eight constant composition expansion (CCE) tests are conducted to obtain new experimental data. A thermodynamic model is used to accurately predict saturation pressure and swelling factors, as well as the phase boundaries of N2/heavy oil systems and DME/CO2/heavy oil systems, with high accuracy.
Article
Energy & Fuels
Morteza Afkhamipour, Ebad Seifi, Arash Esmaeili, Mohammad Shamsi, Tohid N. Borhani
Summary: Non-conventional amines are being researched worldwide to overcome the limitations of traditional amines like MEA and MDEA. Adequate process and thermodynamic models are crucial for understanding the applicability and performance of these amines in CO2 absorption, but studies on process modeling for these amines are limited. This study used rate-based modeling and Deshmukh-Mather method to model CO2 absorption by DETA solution in a packed column, validated the model with experimental data, and conducted a sensitivity analysis of mass transfer correlations. The study also compared the CO2 absorption efficiency of DETA solution with an ionic solvent [bmim]-[PF6] and highlighted the importance of finding optimum operational parameters for maximum absorption efficiency.
Article
Energy & Fuels
Arastoo Abdi, Mohamad Awarke, M. Reza Malayeri, Masoud Riazi
Summary: The utilization of smart water in EOR operations has gained attention, but more research is needed to understand the complex mechanisms involved. This study investigated the interfacial tension between smart water and crude oil, considering factors such as salt, pH, asphaltene type, and aged smart water. The results revealed that the hydration of ions in smart water plays a key role in its efficacy, with acidic and basic asphaltene acting as intrinsic surfactants. The pH also influenced the interfacial tension, and the aged smart water's interaction with crude oil depended on asphaltene type, salt, and salinity.
Article
Energy & Fuels
Dongao Zhu, Kun Zhu, Lixian Xu, Haiyan Huang, Jing He, Wenshuai Zhu, Huaming Li, Wei Jiang
Summary: In this study, cobalt-based metal-organic frameworks (Co-based MOFs) were used as supports and co-catalysts to confine the NHPI catalyst, solving the leaching issue. The NHPI@Co-MOF with carboxyl groups exhibited stronger acidity and facilitated the generation of active oxygen radicals O2•, resulting in enhanced catalytic activity. This research provides valuable insights into the selection of suitable organic linkers and broadens the research horizon of MOF hybrids in efficient oxidative desulfurization (ODS) applications.
Article
Energy & Fuels
Edwin G. Hoyos, Gloria Amo-Duodu, U. Gulsum Kiral, Laura Vargas-Estrada, Raquel Lebrero, Rail Munoz
Summary: This study investigated the impact of carbon-coated zero-valent nanoparticle concentration on photosynthetic biogas upgrading. The addition of nanoparticles significantly increased microalgae productivity and enhanced nitrogen and phosphorus assimilation. The presence of nanoparticles also improved the quality of biomethane produced.
Article
Energy & Fuels
Yao Xiao, Asma Leghari, Linfeng Liu, Fangchao Yu, Ming Gao, Lu Ding, Yu Yang, Xueli Chen, Xiaoyu Yan, Fuchen Wang
Summary: Iron is added as a flocculant in wastewater treatment and the hydrothermal carbonization (HTC) of sludge produces wastewater containing Fe. This study investigates the effect of aqueous phase (AP) recycling on hydrochar properties, iron evolution and environmental assessment during HTC of sludge. The results show that AP recycling process improves the dewatering performance of hydrochar and facilitates the recovery of Fe from the liquid phase.
Article
Energy & Fuels
He Liang, Tao Wang, Zhenmin Luo, Jianliang Yu, Weizhai Yi, Fangming Cheng, Jingyu Zhao, Xingqing Yan, Jun Deng, Jihao Shi
Summary: This study investigated the influence of inhibitors (carbon dioxide, nitrogen, and heptafluoropropane) on the lower flammability limit of hydrogen and determined the critical inhibitory concentration needed for complete suppression. The impact of inhibitors on explosive characteristics was evaluated, and the inhibitory mechanism was analyzed with chemical kinetics. The results showed that with the increase of inhibitor quantity, the lower flammability limit of hydrogen also increased. The research findings can contribute to the safe utilization of hydrogen energy.
Article
Energy & Fuels
Zonghui Liu, Zhongze Zhang, Yali Zhou, Ziling Wang, Mingyang Du, Zhe Wen, Bing Yan, Qingxiang Ma, Na Liu, Bing Xue
Summary: In this study, high-performance solid catalysts based on phosphotungstic acid (HPW) supported on Zr-SBA-15 were synthesized and evaluated for the one-pot conversion of furfural (FUR) to γ-valerolactone (GVL). The catalysts were characterized using various techniques, and the ratio of HPW and Zr was found to significantly affect the selectivity of GVL. The HPW/Zr-SBA-15 (2-4-15) catalyst exhibited the highest GVL yield (83%) under optimized reaction conditions, and it was determined that a balance between Bronsted acid sites (BAS) and Lewis acid sites (LAS) was crucial for achieving higher catalytic performance. The reaction parameters and catalyst stability were also investigated.
Article
Energy & Fuels
Michael Stoehr, Stephan Ruoff, Bastian Rauch, Wolfgang Meier, Patrick Le Clercq
Summary: As part of the global energy transition, an experimental study was conducted to understand the effects of different fuel properties on droplet vaporization for various conventional and alternative fuels. The study utilized a flow channel to measure the evolution of droplet diameters over time and distance. The results revealed the temperature-dependent effects of physical properties, such as boiling point, liquid density, and enthalpy of vaporization, and showed the complex interactions of preferential vaporization and temperature-dependent influences of physical properties for multi-component fuels.
Article
Energy & Fuels
Yuan Zhuang, Ruikang Wu, Xinyan Wang, Rui Zhai, Changyong Gao
Summary: Through experimental validation and optimization of the chemical kinetic model, it was found that methanol can accelerate the oxidation reaction of ammonia, and methanol can be rapidly oxidized at high concentration. HO2 was found to generate a significant amount of OH radicals, facilitating the oxidation of methanol and ammonia. Rating: 7.5/10.
Article
Energy & Fuels
Radwan M. EL-Zohairy, Ahmed S. Attia, A. S. Huzayyin, Ahmed I. EL-Seesy
Summary: This paper presents a lab-scale experimental study on the impact of diethyl ether (DEE) as an additive to waste cooking oil biodiesel with Jet A-1 on combustion and emission features of a swirl-stabilized premixed flame. The addition of DEE to biodiesel significantly affects the flame temperature distribution and emissions. The W20D20 blend of DEE, biodiesel, and Jet A-1 shows similar flame temperature distribution to Jet A-1 and significantly reduces UHC, CO, and NOx emissions compared to Jet A-1.
Article
Energy & Fuels
Jiang Bian, Ziyuan Zhao, Yang Liu, Ran Cheng, Xuerui Zang, Xuewen Cao
Summary: This study presents a novel method for ammonia separation using supersonic flow and develops a mathematical model to investigate the condensation phenomenon. The results demonstrate that the L-P nucleation model accurately characterizes the nucleation process of ammonia at low temperatures. Numerical simulations also show that increasing pressure and concentration can enhance ammonia condensation efficiency.
Article
Energy & Fuels
Shiyuan Pan, Xiaodan Shi, Beibei Dong, Jan Skvaril, Haoran Zhang, Yongtu Liang, Hailong Li
Summary: Integrating CO2 capture with biomass-fired combined heat and power (bio-CHP) plants is a promising method for achieving negative emissions. This study develops a reliable data-driven model based on the Transformer architecture to predict the flowrate and CO2 concentration of flue gas in real time. The model validation shows high prediction accuracy, and the potential impact of meteorological parameters on model accuracy is assessed. The results demonstrate that the Transformer model outperforms other models and using near-infrared spectral data as input features improves the prediction accuracy.