Article
Energy & Fuels
Sunan Cong, Jierui Li, Weidong Liu, Yu Shi, Yalong Li, Kai Zheng, Xun Luo, Wenbo Luo
Summary: This paper aimed to investigate the imbibition displacement mechanism of fracturing flooding by combining the surfactant of chemical flooding with the fracturing fluid. By conducting microfluidic model experiment and NMR experiment, the study found that a mixture of heavy alkyl benzene sulfonate surfactant, nonionic surfactant, and betaine-type amphoteric surfactant can greatly improve the imbibition recovery in ultra-low permeability reservoirs. The HAS-6C surfactant had the lowest interfacial tension, while HAS-5E had the best effect in starting clustered residual oil.
Article
Energy & Fuels
Guangfeng Liu, Tenghuan Zhang, Qichao Xie, Wantao Liu, Lianhe Wang, Daoyong Yang
Summary: The study developed an integrated framework to experimentally determine live oil oxidation and evaluate air injection performance in a tight reservoir. Results showed that air injection led to higher oil recovery compared to nitrogen injection, with the oxygen addition reaction and bond scission reaction reducing oil viscosity and increasing flowability in the reservoir.
Article
Energy & Fuels
Qin Bing, Zhao Lin, Jiang Jianlin
Summary: During the water-flooding development of heavy oil reservoir, the problems of poor fluidity, high residual oil saturation, and low recovery efficiency are caused by the high viscosity and oil-water mobility ratio of heavy oil. Analysis of the molecular structure characteristics of asphaltenes and resins in heavy oil led to the development of three chemical oil displacement agents for heavy oil reservoirs, based on their emulsification performance, interface performance, and oil washing performance. The performance evaluation of the chemical agents showed that the emulsification and viscosity reduction performance were more important than the oil washing capacity and the interface performance for heavy oil reservoirs.
CHINA PETROLEUM PROCESSING & PETROCHEMICAL TECHNOLOGY
(2022)
Article
Energy & Fuels
Lu Xiangguo, Cao Bao, Xie Kun, Cao Weijia, Liu Yigang, Zhang Yunbao, Wang Xiaoyan, Zhang Jie
Summary: In polymer flooding, there is no positive correlation between the viscosity of polymer displacement agents and displacement performance. While polymer with sheet-net structure has the ability to increase viscosity, it has poor compatibility with reservoir rock pore throat structure. On the other hand, heterogeneous weak gel system has higher adsorption and retention capacity, making it easier to establish seepage resistance in porous media.
PETROLEUM EXPLORATION AND DEVELOPMENT
(2021)
Article
Chemistry, Physical
Chunming Xiong, Shujun Li, Bin Ding, Xiangfei Geng, Jun Zhang, Youguo Yan
Summary: The study shows that in deep reservoirs, CO2 has the highest displacement capability, followed by C3H8, CH4, and N2. The solubility of gas, adsorption strength of oil, and detachment capability of injected gas are crucial factors affecting displacement performance.
CHEMICAL PHYSICS LETTERS
(2021)
Article
Energy & Fuels
Luky Hendraningrat, Saeed Majidaie, Nor Idah Kechut, Raj Deo Tewari, M. Faizal Sedaralit, Fraser Skoreyko, Seyed Mousa Mousavimirkalaei
Summary: This paper focuses on the development of a new simulation technology for nanoparticles, which incorporates all observed mechanisms from pore scale to field scale. The model has been validated through laboratory experiments and training with various experimental data sets, showing high accuracy. The study provides a new reference for the application of nanoparticles in IOR/EOR at field scale.
Article
Energy & Fuels
Zhichao Zhou, Michal Slany, Eva Kuzielova, Wangyuan Zhang, Liwa Ma, Sanbao Dong, Jie Zhang, Gang Chen
Summary: The study found that sodium clay showed the best catalytic effect on the aquathermolysis of heavy oil, while methanol was the most suitable alcohol to enhance viscosity reduction efficiency. Under optimal conditions, the viscosity reduction rate can reach 87.32%.
Article
Energy & Fuels
Elham Mokarami Moghadam, Ali Naseri, Mohammad Ali Riahi
Summary: A computer-based model MLP-NN was designed in this study for viscosity estimation of oil, utilizing laboratory measured data and showing higher precision and reliability compared to other predictive methods.
PETROLEUM SCIENCE AND TECHNOLOGY
(2022)
Article
Geochemistry & Geophysics
Lihua Shao, Ru Ji, Shuyi Du, Hongqing Song
Summary: This study proposed three viscosity prediction models based on machine learning approaches, with the random forest (RF) model showing the most accurate predictions and fastest computing time. Sensitivity analysis revealed that different factors affect the viscosity of each phase in a reservoir, with oil viscosity being crucial for oil production and mainly influenced by the molar ratio of gas to oil (MR-GO).
Article
Engineering, Chemical
Alexey S. S. Sorokin, Alexander V. V. Bolotov, Daniyar R. R. Nuriev, Vadim K. K. Derevyanko, Ilgiz F. F. Minkhanov, Mikhail A. A. Varfolomeev
Summary: Slim tube displacement tests were conducted to calculate the minimum miscibility pressure (MMP). A new parameter based on the ratio of volume flow rates was proposed to clarify the MMP value. Experimental results confirmed the effectiveness of this method in determining the MMP value.
Article
Energy & Fuels
Lanlan Yao, Zhengming Yang, Haibo Li, Meng Du, Tiyao Zhou, Yapu Zhang
Summary: A new flow mathematical model was developed based on capillary model, stress sensitivity, and boundary layer effect, which was verified with the experimental results of a shale oil reservoir in Jilin. The study analyzed the influencing factors of flow characteristics and found that the boundary layer effect and stress sensitivity were the main factors. Additionally, a method for evaluating the effective displacement distance of shale oil reservoir with CO2 injection was developed, and nonlinear flow curves of displacement distance were obtained under different injection and production pressure differences. This research provides a theoretical basis for enhanced oil recovery of shale oil with CO2 injection.
Article
Geosciences, Multidisciplinary
Sen Yang, Zheng Shu, Qunshuang Zhang, Yuanshou Zhao, Zongli Chen, Lei Zhang
Summary: The coupling relationship between polymer gel system and reservoir pores was studied through indoor experiments. Based on the experimental results and observations, a set of criteria for determining reservoir-matched polymer gel profile control agents is proposed.
FRONTIERS IN EARTH SCIENCE
(2022)
Article
Energy & Fuels
Long Yu, Shidong Li, Ludger Paul Stubbs, Hon Chung Lau
Summary: This study investigates the rheological behavior of Na-montmorillonite stabilized oil-in-water Pickering emulsions under various conditions. Results show the formation of a three-dimensional clay network at specific salinities and pH values, leading to high viscosity and shear thinning behavior. Emulsion viscosity increases with clay concentration and decreases with increasing pH, with a clay-droplet network forming more easily in an acidic environment. The clay-stabilized emulsion displays elastic behavior and can maintain high viscosity and elasticity under different salinities and pH values.
JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING
(2021)
Article
Energy & Fuels
Danchen Li, Ye Zhang, Zunsheng Jiao, Soheil Saraji
Summary: This study digitally reconstructed a three-dimensional tight sandstone core and conducted multiphase flow simulations to evaluate the performance of different injection strategies for carbon dioxide (CO2) flooding. The simulations closely replicated the laboratory-tested procedures and provided realistic fluid distributions. The saturation functions for CO2 injection after water flooding were determined, and critical enhanced oil recovery operational parameters were optimized to maximize CO2 displacement performance. Both water alternative gas (WAG) injection and cyclic CO2 injection were found to be effective for oil recovery in the tight reservoir.
Article
Energy & Fuels
Mohammed Al Hamad, Bastian Sauerer, Taha Okasha, Wael Abdallah
Summary: This study successfully predicted the interfacial tension of live crude oil samples at reservoir conditions by establishing correlations based on dead oil data, achieving accurate predictions with average errors below 5%.
JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING
(2021)
Article
Chemistry, Physical
Kun Xie, Weijia Cao, Xiangguo Lu, Kaoping Song, Yigang Liu, Yunbao Zhang, Jinxiang Liu, Jinlong Lv, Wei Wang, Risu Na
JOURNAL OF DISPERSION SCIENCE AND TECHNOLOGY
(2020)
Article
Energy & Fuels
Weijia Cao, Kun Xie, Xiangguo Lu, Qing Chen, Zhongyuan Tian, Wei Lin
JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING
(2020)
Article
Energy & Fuels
Weijia Cao, Kun Xie, Bao Cao, Xiangguo Lu, Zhongyuan Tian
Summary: This study examined the use of inorganic gel as a profile control and oil displacement agent in the L-III reservoir of the Weizhou 11-1 Oilfield in South China. The results showed that the inorganic gel performed well under high temperature conditions and successfully increased the recovery rate.
JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING
(2021)
Article
Geochemistry & Geophysics
Bao Cao, Pu Wei, Fuchun Tian, Yang Yan, Kun Xie, Weijia Cao, Xuewei Liu, Xiangguo Lu, Yu Li, Hongru Li
Summary: The study proposed a method of cyclic huff-n-puff with surfactants based on complex fracture networks to achieve higher oil recovery in water-wet extralow-permeability models, addressing the difficulty of injection from one well to others in such reservoirs. However, due to the rapid reduction of oil recovery in each cycle, alternative methods should be considered after several cycles.
Article
Geochemistry & Geophysics
Xiaoyan Wang, Kun Xie, Jie Zhang, Yong Zhang, Yang Zhang, Wei Wang, Xi Yan, Fengxiang Zhao
Summary: Water huff-n-puff is an effective technology to improve the development effect of ultralow-permeability reservoirs by considering key influential factors such as imbibition and energy supplement. Physical simulation experiments were conducted to study the mechanisms and influencing factors of water huff-n-puff, providing beneficial conditions for this recovery method. Field practice has shown that water huff-n-puff can achieve a success rate of 92.1% and significantly increase oil production in ultralow-permeability reservoirs.
Article
Chemistry, Physical
Bao Cao, Kun Xie, Xiangguo Lu, Weijia Cao, Xin He, Zhongmin Xiao, Yunbao Zhang, Xiaoyan Wang, Cheng Su
Summary: A comprehensive method of the combined operation of profile modification and water shutoff with in-depth displacement was proposed to enhance oil recovery in Bohai oilfield. Through detailed research and field application, it was found that the combined operation could comprehensively improve the sweep efficiency and oil displacement efficiency of the reservoir, showing significant effects on treating highly heterogeneous reservoirs.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2021)
Article
Energy & Fuels
Hongjun Fan, Xiabin Wang, Weijia Cao, Kun Yan, Kun Xie, Xiangguo Lu, Mingwei He
Summary: This study proposes the combined technologies of profile control, profile control and flooding, and oil displacement to enhance the water flooding development effect in the severely heterogeneous Q oilfield. The influence of different well pattern types on the distribution of remaining oil after development was also investigated.
Article
Energy & Fuels
Bao Cao, Xiangguo Lu, Kun Xie, Hongna Ding, Zhongmin Xiao, Weijia Cao, Yanxia Zhou, Xin He, Yu Li, Hongru Li
Summary: The imbibition of water with surfactants is important for enhanced oil recovery in tight sandstone reservoirs. This study investigated the migration behaviors of water and oil in different-sized pores, as well as the mechanisms of spontaneous and forced imbibition with different surfactants. It was found that surfactants increased oil recovery, especially in mesopores and macropores. However, low-IFT surfactants reduced oil recovery in micropores. Forced imbibition enhanced water imbibition into micropores but prevented oil extraction from mesopores and macropores.
JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING
(2022)
Article
Engineering, Chemical
Liming Yao, Yuxi Liu, Jubao Liu, Zhongmin Xiao, Kun Xie, Huihui Cao, Hailong Zhang
Summary: High-concentration solid-liquid two-phase flow can lead to pipe leakage and tool failure. However, optimizing the CFD-DEM method can avoid particle penetration caused by high-speed collisions and predict the behavior of dense high-speed particles in reduced-diameter pipes.
Article
Chemistry, Multidisciplinary
Kun Xie, Cheng Su, Changlong Liu, Weijia Cao, Xin He, Hongna Ding, Jie Mei, Kun Yan, Qian Cheng, Xiangguo Lu
Summary: A new composite gel was developed for plugging dominant fluid flow channels in offshore oilfields, with organic and inorganic gel networks interpenetrating to form a compact three-dimensional structure for effective plugging. The composite gel demonstrated strong plugging abilities and resistance to external influences, providing a significant improvement compared to traditional inorganic and organic gels.
Article
Energy & Fuels
Kun Xie, Jie Mei, Weijia Cao, Bao Cao, Liming Yao, Baoyan Zhang, Haiguang Wang, Kejin Guo, Zhanqi Wu, Kun Yan, Xiangguo Lu, Kexin Wang
Summary: Polymer gel fracturing fluid and guar gum fracturing fluid increase oil production through different mechanisms. Filtration displacement of polymer gel fracturing fluid can improve the distribution of residual oil in reservoirs and enhance oil recovery.
JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING
(2022)
Article
Energy & Fuels
Yu Suo, Xianheng Su, Qinyou Ye, Zhixi Chen, Fuping Feng, Xiangyang Wang, Kun Xie
Summary: High temperature stimulation is effective in releasing the damage caused during hydraulic fracturing of unconventional oil and gas resources. The increase in temperature results in decreased seismic velocity and increased permeability and porosity of shale. The high temperature promotes fracture propagation and increases stress concentration at the fracture tip.
JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING
(2022)
Article
Polymer Science
Huiying Zhong, Bowen Shi, Yuanyuan He, Yongbin Bi, Yu Zhao, Kun Xie
Summary: This paper investigates the flow mechanism of polymer solution in dual heterogeneous reservoir, considering wettability and gravity. The effects of wettability and rock particle shape on flow characteristics are studied. The results show that the circular particle model has the highest oil displacement efficiency, and water-wet conditions lead to higher efficiency.
Article
Energy & Fuels
Lu Xiangguo, Cao Bao, Xie Kun, Cao Weijia, Liu Yigang, Zhang Yunbao, Wang Xiaoyan, Zhang Jie
Summary: In polymer flooding, there is no positive correlation between the viscosity of polymer displacement agents and displacement performance. While polymer with sheet-net structure has the ability to increase viscosity, it has poor compatibility with reservoir rock pore throat structure. On the other hand, heterogeneous weak gel system has higher adsorption and retention capacity, making it easier to establish seepage resistance in porous media.
PETROLEUM EXPLORATION AND DEVELOPMENT
(2021)
Article
Geosciences, Multidisciplinary
Weijia Cao, Kun Xie, Xiaoyan Wang, Xiangguo Lu, Xin He, Guorui Xu, Xiang Li
GEOSYSTEM ENGINEERING
(2020)
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.