Article
Chemistry, Physical
Xuezhi Zhao, Fuxing Zhan, Guangzhi Liao, Weidong Liu, Xin Su, Yujun Feng
Summary: This study investigates the visualization of in situ generation of middle-phase microemulsion during surfactant enhanced oil recovery (EOR) and quantifies its contribution to the oil recovery factor.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2022)
Article
Energy & Fuels
Andrey Viktorovich Minakov, Dmitriy Viktorovich Guzei, Maxim Ivanovich Pryazhnikov, Sergey Anatol'yevich Filimonov, Yulia Olegovna Voronenkova
Summary: The oil recovery factor (ORF) increases with the increase of mass fraction of nanoparticles; increasing the nanoparticle concentration to 0.5% allows an increase in ORF by about 19% compared to water flooding; ORF increases with the decrease of nanoparticle size and declines with the increase of displacing rate.
PETROLEUM EXPLORATION AND DEVELOPMENT
(2021)
Article
Chemistry, Physical
Hua Li, Weiyao Zhu, Zhiyong Song
Summary: Surfactants are widely used in enhanced oil recovery due to their ability to reduce interfacial tension, change wettability, and emulsify oil. This study compared three commonly used surfactants and found that they all effectively reduce oil-water interfacial tension, but differ in their ability to change wettability and emulsify oil. Two of the surfactants, amphoteric-alcohol ether sulfate and biological-lipopeptide, were found to improve sweep volume through emulsification, while the anionic-petroleum sulfonate primarily increased oil recovery by reducing interfacial tension.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2022)
Article
Engineering, Chemical
Dejun Wu, Kang Zhou, Yongsheng Liu, Bei Wei, Zhibin An, Dong Zhao, Jian Hou
Summary: This paper investigates the retention and flow diversion characteristics of polymer microspheres, as well as their microscopic conformance control and oil recovery performance. The findings indicate that the concentration of polymer microspheres positively affects sweep efficiency and oil recovery, while injection rate has the opposite effect.
CHEMICAL ENGINEERING SCIENCE
(2023)
Article
Energy & Fuels
Xue-Zhi Zhao, Guang-Zhi Liao, Ling-Yan Gong, Huo-Xin Luan, Quan-Sheng Chen, Wei-Dong Liu, Dong Liu, Yu-Jun Feng
Summary: This study aims to reveal the roles of micellar solubilization and in-situ emulsification in enhanced oil recovery during surfactant flooding. The results show that micellar solubilization plays a significant role in improving oil recovery in low concentration surfactant solutions, while in-situ emulsification enhances oil recovery through blocking and entrainment effects.
Article
Engineering, Petroleum
Lei Li, Zheng Chen, Yu-Liang Su, Li-Yao Fan, Mei-Rong Tang, Jia-Wei Tu
Summary: It has been found that using supercritical CO2 as the prefracturing energized fluid for fracturing in the Loess Plateau of the Ordos Basin can conserve water resources, reduce environmental impact, and increase oil field production, showing promising potential for widespread application.
Article
Energy & Fuels
Shuoshi Wang, Onyekachi Ogbonnaya, Changlong Chen, Na Yuan, Benjamin Shiau, Jeffrey H. Harwell
Summary: This study focuses on the development of a low-temperature in situ CO2 enhanced oil recovery (ICE) system using urease-catalyzed urea hydrolysis. The experimental results demonstrate the high tertiary recovery potential of this system under low-temperature conditions.
Article
Chemistry, Physical
Long Dong, Yiqiang Li, Jing Wen, Wenbin Gao, Yuqing Tian, Qingchun Deng, Zheyu Liu
Summary: This study investigated and compared two types of polymeric surfactants with different molecular structures. The results showed that the polymeric surfactant with a spatial network structure exhibited better enhanced oil recovery performance, with excellent thickening, shear-resistance, and salt-resistance abilities.
JOURNAL OF MOLECULAR LIQUIDS
(2022)
Article
Chemistry, Physical
Wenbin Gao, Yiqiang Li, Jin Zhang, Huoxin Luan, Han Cao, Zhihao Yu
Summary: This study investigated the surfactant-enhanced mobilization features in complicated pore structures using experiments and quantitative methods. Results showed that surfactant significantly improved pore-throat displacement efficiency, contributing to higher recovery rates. The impact of surfactant on pore-throat sweep efficiency varied in different displacement patterns.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2021)
Article
Chemistry, Physical
Hongbin Yang, Zhiqi Lv, Min Zhang, Jiatong Jiang, Bin Xu, Jingjing Shen, Haizhuang Jiang, Wanli Kang
Summary: Amphiphilic polymer PMC16 is capable of emulsifying crude oil, reducing oil viscosity, and altering wettability, thereby enhancing the recovery of heavy oil.
JOURNAL OF MOLECULAR LIQUIDS
(2023)
Article
Mechanics
Menglan Li, Wanli Kang, Zhe Li, Hongbin Yang, Ruxue Jia, Yingqi He, Xin Kang, Zhongwen Zheng, Yongdong Wang, Bauyrzhan Sarsenbekuly, Maratbek Gabdullin
Summary: Nanoemulsions with small particle size, uniform dispersion, and long-term stability were prepared using the emulsification inverse phase method at a constant temperature. The effects of emulsifier and water content, salinity, and reservoir temperature on the stability of the nanoemulsion were studied, with results showing that increasing emulsifier content can enhance stability. The oil washing efficiency of the nanoemulsion can reach as high as 83%, providing theoretical support for efficient flooding systems in low-permeability reservoirs.
Article
Chemistry, Physical
Rohit Kumar Saw, Pranali M. Rane, Dinesh Joshi, Shubham Prakash, Lavisha Jangid, Ajay Mandal
Summary: In recent years, there has been increasing interest in the application of natural surfactants in enhanced oil recovery (EOR) due to environmental concerns. This study introduces a novel non-ionic surfactant synthesized from olive oil and evaluates its properties. The synthesized surfactant showed effective emulsification, wettability modification, and efficient oil displacement. Additionally, the surfactant had a low critical micelle concentration, indicating its ability to reduce interfacial tension.
JOURNAL OF MOLECULAR LIQUIDS
(2023)
Article
Environmental Sciences
Satyajit Chowdhury, Mayank Rakesh, Srawanti Medhi, Japan Trivedi, Jitendra S. Sangwai
Summary: This study examines the behavior of supercritical CO2 (sc-CO2) under different temperature and pressure conditions, and finds that sc-CO2 sequestration is more effective in light oil reservoirs, while higher pressures enhance sequestration or oil recovery in heavy oil reservoirs.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2022)
Review
Energy & Fuels
Talha Majeed, Muhammad Shahzad Kamal, Xianmin Zhou, Theis Solling
Summary: The application of foam in the upstream petroleum industry has attracted attention, with stability being crucial for success, and nanoparticles playing a significant role in stabilizing the foam.
Article
Polymer Science
Dongtao Fei, Jixiang Guo, Ruiying Xiong, Xiaojun Zhang, Chuanhong Kang, Wyclif Kiyingi
Summary: The study successfully reduced heavy oil viscosity and enhanced recovery rate using the PAALB polymer. Through a series of tests, it was found that PAALB can reduce heavy oil viscosity, improve oil-water displacement, and induce spontaneous emulsification of heavy oil, thereby increasing recovery rate.
Article
Energy & Fuels
Yunfei Guo, Huiqing Liu, Yabin Feng, Xiaohu Dong, Wei Zheng
Summary: Steam-assisted gravity drainage (SAGD) is a widely used thermal method for developing heavy oil reservoirs. This study expands the analytical model for steam chamber geometry to include the rise and confinement stages of SAGD, establishing models to estimate oil production rate and SOR with time. The newly proposed model is validated against experimental data and numerical simulation, showing greater accuracy than previous models and providing significant guidance for the development of SAGD processes in oil fields.
JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING
(2022)
Article
Energy & Fuels
Qichen Zhang, Xiaodong Kang, Huiqing Liu, Xiaohu Dong, Jian Wang
Summary: This study investigates the impact of breccia interlayer on SAGD performance through physical experiments and numerical simulations. The results show that the presence of breccia interlayer leads to a thinner steam chamber, longer production time, and reduced ultimate oil recovery. Moreover, lower permeability in thicker breccia layer areas has a significant adverse effect on oil recovery, while permeability has a limited impact on performance in thinner breccia layer areas.
JOURNAL OF PETROLEUM EXPLORATION AND PRODUCTION TECHNOLOGY
(2022)
Article
Engineering, Chemical
Xiaohu Dong, Qilan Luo, Jing Wang, Huiqing Liu, Zhangxin Chen, Jinze Xu
Summary: This article proposes a new method to quantitatively evaluate the effect of pore heterogeneity on the adsorption behavior of fluids in nanopores. The proposed method is validated against experimental data of shale rocks.
Review
Engineering, Chemical
Dong Feng, Zhangxin Chen, Keliu Wu, Jing Li, Xiaohu Dong, Yan Peng, Xinfeng Jia, Xiangfang Li, Dinghan Wang
Summary: This paper presents the current advances and systematic summary on the fluid flow in shale gas reservoirs. It discusses the shale pore structures, reservoir fluids, and various flow phenomena and mechanisms driven by scale effects. The influences of scale effects and pore structures on fluid flow through heterogeneous shale matrix are clarified. The study concludes that fluid flow in shale gas reservoirs is a complex multi-scale process accompanied by multi-physical phenomena and multi-fluid distributions.
CANADIAN JOURNAL OF CHEMICAL ENGINEERING
(2022)
Article
Energy & Fuels
Tingen Fan, Wenjiang Xu, Wei Zheng, Weidong Jiang, Xiuchao Jiang, Taichao Wang, Xiaohu Dong
Summary: In this paper, a new model for the productivity of a CSS well in multilayer heavy oil reservoirs is proposed, which can accurately predict the preliminary productivity of CSS well by analyzing the formation factor and equivalent flow resistance, etc. The accuracy of the model is verified by comparing with actual results.
Article
Energy & Fuels
Ning Lu, Xiaohu Dong, Zhangxin Chen, Huiqing Liu, Wei Zheng, Bo Zhang
Summary: In this paper, Molecular Dynamics (MD) simulation is used to investigate the adsorption behavior of asphaltenes in the hybrid thermal-solvent recovery process. The study concludes that nC(4)H(10) is the optimal solvent for heavy oil reservoirs.
JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING
(2022)
Article
Chemistry, Multidisciplinary
Bin Zhao, Xiaohu Dong, Yanpeng Chen, Shanshan Chen, Zhangxin Chen, Yan Peng, Yishan Liu, Xiuchao Jiang
Summary: This study investigated the evolution of pore structure during the heating process of coal. The results showed that the heating process can be divided into three stages, dominated by drying, primary pyrolysis, and secondary pyrolysis reactions at different temperature ranges. The coal transformed into porous char or ash framework during the heating process.
Article
Energy & Fuels
Xiaohu Dong, Jian Wang, Huiqing Liu, Deshang Zeng, Qichen Zhang
Summary: This paper investigates the recovery performance of the multi-lateral well SAGD process in heavy oil reservoirs using a three-dimensional physical model. The advantages of multi-lateral wells in terms of liquid production and steam chamber expansion are discussed based on experimental observations. The distribution of residual oil saturation after the SAGD process is also analyzed. The results show that the application of multi-lateral wells can effectively increase the oil recovery factor and improve the recovery time compared to the conventional dual horizontal well SAGD process.
JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING
(2022)
Editorial Material
Geosciences, Multidisciplinary
Xiaohu Dong, Jing Wang, Zhehui Jin, Feng Yang, Yulong Zhao
FRONTIERS IN EARTH SCIENCE
(2022)
Article
Chemistry, Physical
Xiaohu Dong, Wenjing Xu, Renjing Liu, Zhangxin Chen, Ning Lu, Wenting Guo
Summary: This study investigates the adsorption and diffusion behavior of shale oil in nanoscale slit nanopores using molecular dynamics simulation. The results show that multicomponent alkanes can form multilayer adsorption states in the nanopores, with heavy components occupying the porewall surface adsorption sites. The adsorption and diffusion behavior is influenced by factors such as fluid composition, nanopore type, and porewall wettability. The study provides important data support for the effective development of shale oil reservoirs.
JOURNAL OF MOLECULAR LIQUIDS
(2022)
Article
Materials Science, Multidisciplinary
Xuecheng Jiang, Chunlei Wei, Yan Gu, Xiaohu Dong, Zhijian Xie, Qi Zhang, Chun Zhu, Weiying Qian, Naiyan Lu, Guoqing Chen, Guofeng Yang
Summary: We report and compare a sensitive heavy metal ion sensor for the detection of copper ion, iron ion, lead ion, and cadmium ion. The sensor is based on AlGaN/GaN high electron mobility transistor (HEMT) with L-cysteine functionalized active region. It exhibits fast and stable response to various heavy metal ions and shows a current response that decreases with increasing concentration of the ions. The AlGaN/GaN HEMT-based sensor demonstrates high sensitivities for Cu2+, Fe3+, Pb2+, and Cd2+ detection, suggesting its potential in efficient and fast detection of heavy metal ions.
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
(2022)
Article
Energy & Fuels
Liangliang Jiang, Shanshan Chen, Yanpeng Chen, Zhangxin Chen, Fenjin Sun, Xiaohu Dong, Keliu Wu
Summary: Underground coal gasification (UCG) has the prospect of tapping deep coal seams and reducing carbon emissions. However, there is limited experience in deep UCG development. This study constructed a large-scale 3D UCG model with an improved method and considered the effect of double-diffusive natural convection. The results showed that the improved method was beneficial for the development of UCG cavities in deep coal seams, and double-diffusive natural convection played an important role in cavity development and overall UCG performance.
Article
Energy & Fuels
Yishan Liu, Lin Zu, An Sheng, Yanan Hou, Yuqi Liu, Changbing Tian, Xiaohu Dong, Zhengdong Lei
Summary: This study focuses on the tight oil reservoir conditions in Xinjiang and conducts experiments and simulations to optimize the development scheme based on the geological model and fluid occurrence state. The research shows that CO2 flooding is more effective in enhanced oil recovery compared to CH4 flooding and water flooding. The injection rate affects the recovery factor, but high injection rates can decrease oil recovery and oil change rate. The presence of complex fractures near the well can increase the swept volume, while fractures far from the well can cause channeling and hinder production. Considering the fluid occurrence state during CO2 displacement is important as it affects the recovery factor and permeability.
FRONTIERS IN ENERGY RESEARCH
(2023)
Article
Energy & Fuels
Xiaohu Dong, Wenjing Xu, Huiqing Liu, Zhangxin Chen, Ning Lu, Wuchao Wang
Summary: The replacement mechanisms of CO2 in nanopores of shale oil reservoirs are discussed using static tests and molecular dynamics (MD) simulations in this study. Various molecular models of shale oil and shale rock are developed, and MD simulations are conducted to study the replacement behavior of CO2. The concept of replacement efficiency (RE) is proposed to analyze the effects of shale oil composition, porewall mineral type, and CO2 concentration. This study provides new insights into the understanding of CO2 replacement mechanisms in shale oil reservoirs, which is important for their effective and efficient development.
GEOENERGY SCIENCE AND ENGINEERING
(2023)
Article
Energy & Fuels
Xiao-Hu Dong, Xiu-Chao Jiang, Wei Zheng, Hui-Qing Liu, Ren-Jie Liu, Wu-Chao Wang, De-Shang Zeng, Tai-Chao Wang
Summary: This paper systematically evaluates the sweep efficiency of hybrid steam-chemical processes using microscale visualized experiments and macroscale 3D experiments. The effects of different additives on heavy oil properties and sweep efficiency are investigated. The results show that a multiple hybrid EOR process (steam-N-2/foam/surfactant process) has the highest sweep efficiency.