Article
Mechanics
Shun Liu, Yalong Zhang, Hengyi Du, Jianbin Liu, Zhixiang Zhou, Zongzhen Wang, Kai Huang, Bosheng Pan
Summary: In this study, a two-dimensional visual model of a fractured-vuggy reservoir was designed based on geological data and injection-production characteristics. Flooding experiments were conducted to investigate the oil-water flow characteristics and residual oil distribution. The results showed that a low injection/high production strategy is the most optimal for achieving maximum oil recovery. The findings of this study provide insights for optimal production in fractured-vuggy carbonate reservoirs and enhance the understanding of oil-water flows within the reservoir.
Article
Geochemistry & Geophysics
Daiyin Yin, Wei Zhou
Summary: This paper studies the feasibility of combining deep profile control with cyclic water injection to improve oil recovery in fractured low-permeability reservoirs during the high water cut stage, and analyzes the mechanisms of enhanced oil recovery. The results show that in-depth profile control and cyclic water injection can be synchronized to further increase oil recovery.
Article
Chemistry, Physical
Rohit Kumar Saw, Prathibha Pillai, Ajay Mandal
Summary: In recent decades, low salinity water flooding (LSWF) has gained attention for its effectiveness in oil recovery. However, there is a lack of studies in the literature on the potential of using Ionic Liquids (ILs) as candidates for chemical enhanced oil recovery (CEOR) combined with LSWF. This study evaluates the synergistic effect of ILs with varying chain lengths with low saline ion tuned seawater (ITSW) for enhanced oil recovery from carbonate reservoirs. The analysis shows that ILs demonstrate a better synergistic effect with ITSW, reducing interfacial tension, altering rock wettability, and exhibiting less adsorption density at the reservoir temperature. ILs with the longest chain length ([C12mim] [BF4]) show superior properties and significantly increase oil recovery in low saline ITSW.
JOURNAL OF MOLECULAR LIQUIDS
(2022)
Review
Energy & Fuels
Amin Sharifi, Rohaldin Miri, Masoud Riazi
Summary: The surfactant EOR is considered a promising approach for enhancing oil recovery due to the changing energy supply and demand and the non-renewable nature of world oil reservoirs. However, surfactants face challenges such as high adsorption, low stability, and poor performance in harsh conditions like high temperature, high salinity, and dense carbonate rocks. There is currently no established procedure or framework for systematically selecting the best surfactant for EOR in dense carbonates.
Article
Energy & Fuels
Guang Lu, Liehui Zhang, Qiang Liu, Qiukang Xu, Yulong Zhao, Xinhua Li, Guangxiao Deng, Yan Wang
Summary: Fractured-vuggy reservoirs have diverse reservoir spaces, uneven connectivity, and strong spatial heterogeneity, posing challenges for understanding remaining oil distribution. Experimental results show that extending injection-production distance, avoiding water injection in areas with deep dominant pathways, and increasing injection rate within a certain range can enhance oil recovery. Different types of remaining oil distribution, such as attic-type oil and blocked-type oil, exist in fractured-vuggy systems, requiring comprehensive analysis for optimizing tapping schemes and maximizing recovery degree.
JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING
(2022)
Article
Energy & Fuels
Emil R. Saifullin, Polina O. Putintseva, Rustam N. Sagirov, Mikhail A. Varfolomeev, Chengdong Yuan, Roman S. Pavelyev, Sergey A. Nazarychev, Aleksei O. Malahov, Lucia Akimushkina, Dmitrii A. Zharkov, Alexey O. Bykov, Ulukbek Mirzakimov
Summary: This study successfully synthesized three novel anionic-nonionic surfactants based on the nonionic surfactant NPEO and evaluated their effectiveness for enhanced oil recovery in high salinity water. The modified surfactants showed significant reduction in interfacial tension and improved wettability of the rock, leading to increased oil production. Filtration experiments indicated the great potential of these novel surfactants for enhanced oil recovery in high salinity reservoirs.
Article
Geochemistry & Geophysics
Hong Cheng, Lin Jiang, Chenggang Li
Summary: This study investigates the high-pressure production characteristics of double-vug reservoirs with bottom water in the Tahe Oilfield. A physical simulation experiment apparatus is constructed to study the vug-fracture-vug reservoirs under different bottom water characteristics and explore the fracture-vug relationship and oil recovery rates. The findings show that the presence of bottom water significantly affects reservoir development and the constant-pressure bottom water provides sufficient energy. Proper control of production factors can notably improve the development effect of fractured-vuggy reservoirs.
Article
Mechanics
Hongbin Yang, Zhiqi Lv, Zhe Li, Bumin Guo, Jian Zhao, Yantao Xu, Wenjiang Xu, Wanli Kang
Summary: To address the issues of uncontrollable swelling ratio and degradation time, as well as insufficient strength, a controllable self-degradable temporary plugging agent (SD-TPA) was developed. SD-TPA was synthesized using different mass ratios of acrylamide, acrylic acid, hydrophobic monomer, and modified nanoparticles. The effects of modified nanoparticles content, hydrophobic monomers content, temperature, and salinity on the swelling performance, self-degradable performance, and rheological properties of SD-TPA were systematically investigated. The results showed that SD-TPA exhibited improved viscoelasticity, shear resistance, and higher yield stress compared to conventional self-degradable temporary plugging agent (CSD-TPA).
Article
Energy & Fuels
Duy Le-Anh, Ashit Rao, Stefan Schlautmann, Amy Z. Stetten, Subhash C. Ayirala, Mohammed B. Alotaibi, Michel H. G. Duits, Han Gardeniers, A. A. Yousef, Frieder Mugele
Summary: This study investigates the impact of fluid aging and temperature on the design of a successful microfluidic improved oil recovery (IOR) strategy. Laboratory experiments were performed using a glass 2.5D micromodel to simulate waterflooding processes at the pore scale. The results demonstrate the significance of fluid aging and temperature in achieving effective oil recovery.
Article
Energy & Fuels
M. Fouad Snosy, Mahmoud Abu El Ela, Ahmed El-Banbi, Helmy Sayyouh
Summary: This study reviewed the impact of water composition on oil recovery in carbonate reservoirs, finding that the water composition is crucial for successful waterflooding projects. Optimum water composition can improve oil recovery up to 30% in the secondary recovery stage. Additionally, changing water salinity from low salinity waterflooding to high salinity waterflooding can lead to an incremental oil recovery of up to 18% in the tertiary recovery stage.
JOURNAL OF PETROLEUM EXPLORATION AND PRODUCTION TECHNOLOGY
(2022)
Article
Geosciences, Multidisciplinary
Abbas Shahrabadi, Parham Babakhani Dehkordi, Fatemeh Razavirad, Reza Noorimotlagh, Masoud Nasiri Zarandi
Summary: The study found that low salinity water injection has a significant effect on releasing trapped oil, and smart water flooding achieves the maximum oil recovery. Low salinity water and smart water have a significant impact on relative permeability curves, indicating wettability alteration.
NATURAL RESOURCES RESEARCH
(2022)
Review
Energy & Fuels
Afeez Gbadamosi, Shirish Patil, Dhafer Al Shehri, Muhammad Shahzad Kamal, S. M. Shakil Hussain, Emad W. Al-Shalabi, Anas Mohammed Hassan
Summary: This article reviews the combination of low salinity waterflooding (LSWF) and chemical enhanced oil recovery (EOR) for improving oil production in reservoirs. Experimental and modeling results show that the combination of LSWF and chemical EOR is more efficient than individual EOR methods.
Article
Energy & Fuels
Abbas Khaksar Manshad, Jagar A. Ali, Omid Mosalman Haghighi, S. Mohammad Sajadi, Alireza Keshavarz
Summary: A composite material containing zinc and silica nanoparticles and bentonite has been prepared in this study for enhanced oil recovery. Nanocomposites dispersed in water at different salinity levels showed decreased interfacial tension and contact angle with increasing concentration, leading to improved oil recovery.
Article
Chemistry, Physical
Sivabalan Sakthivel
Summary: This study investigated the adsorptive behavior of imidazolium-based ionic liquids (ILs) on oil-wet carbonate reservoirs and evaluated their performance in oil recovery. The results showed that ILs improved oil flowability and increased oil recovery. In comparison to conventional surfactants, surfactants performed better in altering wettability and reducing interfacial tension.
JOURNAL OF MOLECULAR LIQUIDS
(2022)
Article
Energy & Fuels
Fuyong Wang, Lu Wang, Liang Jiao, Zhichao Liu, Kun Yang
Summary: This study investigates the mechanism of surfactant enhanced oil recovery under reservoir conditions through experiments on spontaneous imbibition with surfactants. The impact of different surfactant types and concentrations on oil recovery is examined, along with the effects of interfacial tension, rock wettability, formation water salinity, and core permeability. The results suggest that surfactant-assisted spontaneous imbibition primarily operates through IFT reduction, wettability alteration, and emulsification of crude oil. Strategies to increase oil recovery include reducing surfactant solution salinity and creating microfractures.
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.