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
Chemistry, Physical
Huiyu Wang, Bei Wei, Jian Hou, Yongsheng Liu, Qingjun Du
Summary: This study used microfluidics to observe the fluid flow phenomenon in blind-ends and analyzed the oil displacement mechanism in blind-ends. The results showed that the width of blind-ends affected the displacement efficiency, and heavy oil was more difficult to displace. Polymer flooding and surfactant reduced capillary force and improved the displacement of light oil.
JOURNAL OF MOLECULAR LIQUIDS
(2022)
Article
Chemistry, Physical
Jianguang Wei, Xiaofeng Zhou, Xuedong Shi, Pengqi Gong, Yinghe Chen, Yue Wang, Ping Fu, V. S. Yakushev, M. P. Khaidina, Dong Zhang, Runnan Zhou
Summary: An oilfield has been developed with waterflooding for a long time, and the water cut has reached a high level. The feasibility of using surfactant-polymer (SP) flooding as an enhanced oil recovery (EOR) technique in this oilfield is determined through microscopic oil displacement experiments and observation of the remaining oil distribution after waterflooding and SP flooding. The results show that SP flooding has a much lower contribution limit of pore and throat diameter than waterflooding, indicating its effectiveness in improving sweep efficiency. The efficacy of SP flooding is proved, and a microscopic explanation of remaining oil distribution is provided.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
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
Yun She, Mohammad Azis Mahardika, Yingxue Hu, Anindityo Patmonoaji, Shintaro Matsushita, Tetsuya Suekane, Yuichiro Nagatsu
Summary: Alkaline flooding is a promising method for enhanced oil recovery by forming oil-in-water emulsions in-situ. This study investigates the effects of total acid number (TAN) and injected flow rate on oil recovery performance through 3D oil displacement experiments, confirming that oil recovery increases with higher acid concentration and optimal flow rate. The study also observes nonlinear finger-finger interactions in 3D porous media and verifies oil displacement mechanisms through 2D pore-scale micromodel experiments, concluding that emulsification ability strengthens with higher acid concentration, leading to stable oil displacement mechanisms.
JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING
(2021)
Review
Energy & Fuels
Ahmed Bashir, Amin Sharifi Haddad, Roozbeh Rafati
Summary: Surfactant-based oil recovery processes are used to lower interfacial tension and change the wettability of rock in immiscible displacement processes. The key factors affecting this process are temperature, salinity, pH, surfactant concentration, and adsorption. Chemical enhanced oil recovery (cEOR) processes combine surfactants with other chemicals to exploit their synergy. This review study categorizes the role and displacement mechanisms of surfactants and discusses key factors for analyzing fluid displacement in porous media.
Review
Energy & Fuels
Omid Tavakkoli, Hesam Kamyab, Mahdi Shariati, Abdeliazim Mustafa Mohamed, Radzuan Junin
Summary: This study comprehensively reviews the positive effects of nanoparticles (NPs) on the performance of polymer and surfactant flooding in Enhanced Oil Recovery (EOR). The results show that NPs have great potential to improve the rheological properties of polymers, reduce interfacial tension, alter reservoir rock wettability towards more water-wet medium, and decrease surfactant adsorption on porous media.
Article
Engineering, Chemical
Huiyu Wang, Bei Wei, Zezheng Sun, Qingjun Du, Jian Hou
Summary: This study used a microfluidic chip to investigate the flow behavior of heavy oil droplets under different conditions, finding that the shape of the emulsion droplet is related to surfactant flow rate, thickness, and viscosity of heavy oil. In water flooding conditions, heavy oil droplets advance slowly along the solid surface, while they could be emulsified into tadpole-shaped droplets by surfactant.
CHEMICAL ENGINEERING SCIENCE
(2021)
Review
Energy & Fuels
Dmitriy Podoprigora, Roman Byazrov, Julia Sytnik
Summary: This article discusses the predominance of oil and gas as energy sources in most countries, and the use of chemically enhanced oil recovery methods through surfactant solution injections. It also examines the results of tests and field experiments of SP and ASP technologies in various countries.
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
Chemistry, Multidisciplinary
Sanyuan Qiao, Qingwang Liu, Xian Zhang, Hongchang Che
Summary: A hyperbranched carboxylate-type polymer was synthesized and experimentally evaluated for enhanced oil recovery. It showed significant performance in reducing interfacial tension, increasing micellar solubilization, and had more advantages in low-permeability reservoirs, either used alone or in combination with sodium dodecylsulfate.
FRONTIERS IN CHEMISTRY
(2021)
Article
Chemistry, Physical
Han Cao, Yiqiang Li, Wenbin Gao, Jinxin Cao, Bingyu Sun, Jin Zhang
Summary: Chemical compound flooding with ultra-low interfacial tension (IFT) has been effective in enhancing light oil recovery. However, the optimization of chemical systems for heavy oil displacement has not been clear. This study aimed to address this issue by designing polymer and surfactant-polymer systems with varying IFT and interfacial viscoelasticity. The results showed that a system with low IFT and high interfacial viscoelasticity had better displacement efficiency for heavy oil. The mechanisms driving this enhanced recovery were identified as emulsion formation and interface expansion facilitated by low IFT, as well as increased emulsion stability and reduced snap-off of oil droplets due to the presence of an elastic oil-water interfacial film.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2023)
Article
Polymer Science
Yanfu Pi, Zailai Su, Ruibo Cao, Bo Li, Jinxin Liu, Xinyu Fan, Mingjia Zhao
Summary: This study focuses on using a newly developed precrosslinked particle gel (PPG) combined with alkali surfactant polymer (ASP) to improve the efficiency of heterogeneous system flooding after polymer flooding in Daqing Oilfield. The addition of PPG particles enhances the viscoelasticity of the ASP system and reduces the interfacial tension between the heterogeneous system and crude oil. The experimental results show that employing PPG/ASP heterogeneous flooding after polymer flooding effectively plugs high-flow seepage channels and improves oil washing efficiency.
Article
Energy & Fuels
Lun Zhao, Jincai Wang, Xiangzhong Zhang, Xuejing Guo, Li Chen, Angang Zhang, Kechuan Cao, Junjian Li
Summary: This study presents an experimental investigation on the surfactant/polymer injection for enhanced oil recovery (EOR) in sandstone reservoirs. The results show that polymer injection can effectively displace residual oil and improve the conformance and recovery of surfactant solution.
JOURNAL OF PETROLEUM EXPLORATION AND PRODUCTION 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
Engineering, Chemical
Zheyu Liu, Yiqiang Li, Huoxin Luan, Wenbin Gao, Yang Guo, Yihang Chen
CHEMICAL ENGINEERING SCIENCE
(2019)
Article
Engineering, Chemical
Zheyu Liu, Shruti Mendiratta, Xin Chen, Jian Zhang, Yiqiang Li
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
(2019)
Article
Engineering, Chemical
Xin Chen, Yiqiang Li, ZheYu Liu, Jian Zhang, Cheng Chen, Ming Ma
Article
Energy & Fuels
Xingchao Yang, Hongyan Zhao, Bo Zhang, Qinghui Zhao, Yulin Cheng, Yong Zhang, Yiqiang Li
Summary: This paper investigates the displacement efficiency and produced oil properties in the steam flood heavy oil process through steam flooding experiments. The study finds that temperature, injection velocity, and injection volume have significant impacts on oil displacement and oil properties.
Article
Energy & Fuels
Chao Chen, Xiang Tang, Ming Qin, Rui Zhou, Zhenhua Ding, Guihui Lian, Huan Qi, Xin Chen, Zheyu Liu, Yiqiang Li
Summary: This paper focuses on the research of air injection in shale oil reservoirs. The production characteristics of air flooding and air huff and puff methods are analyzed based on experiments, and the characteristics of residual oil and produced oil are revealed through evaluation methods.
Article
Polymer Science
Xin Chen, Yiqiang Li, Xiaoguang Sun, Zheyu Liu, Jianbin Liu, Shun Liu
Summary: This paper systematically studies the application of polymer-assisted CO2 flooding in low-permeability reservoirs. The study optimizes the polymer agent suitable for low-permeability reservoirs and evaluates the performance of the polymer solution through core experiments. The research compares the enhanced oil recovery effects of polymer-assisted and water-assisted CO2 flooding.
Article
Chemistry, Multidisciplinary
Bo Zhang, Zheyu Liu, Han Zhang, Quan Shi, Yiqiang Li, Chunming Xu
Summary: Water flooding technique is proven to be an economical and viable method for increasing the oil recovery factor of oil fields. This study investigated the molecular selectivity during the water flooding process, especially for heavy oil. The results showed that the properties and compositions of the produced oils varied with different water flooding stages and temperatures.
Article
Chemistry, Multidisciplinary
Zheyu Liu, Shruti Mendiratta, Xin Chen, Jian Zhang, Yiqiang Li