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)
Article
Energy & Fuels
Kwang Hoon Baek, Mingyan Liu, Francisco J. Arguelles-Vivas, Gayan A. Abeykoon, Ryosuke Okuno
Summary: This paper presents an experimental study on low-tension polymer (LTP) flooding using a short-hydrophobe surfactant as the sole additive. The effect of surfactant partition coefficients on LTP flooding is examined, showing that the surfactant partition coefficient can impact the oil recovery through its influence on the surfactant in-situ propagation. Optimization of the surfactant for LTP flooding involves balancing the reduction in water/oil interfacial tension and the efficiency of surfactant propagation.
JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING
(2022)
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
Han Zhao, Wanli Kang, Hongbin Yang, Zitong Huang, Bobo Zhou
Summary: The study showed that the combination system of amphiphilic polymer and surfactant exhibited better emulsifying ability and emulsion stability compared to using either component alone. The improvement was attributed to the low interfacial tension generated by the addition of surfactant, as well as higher external viscosity and stronger interfacial film strength in the emulsion formed by the combination system. These factors collectively slowed down emulsion droplet migration velocity and prevented droplet coalescence, ultimately increasing emulsion stability.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2021)
Article
Chemistry, Multidisciplinary
Bo Dong, Zongyu Qin, Yiwei Wang, Jiahui Zhang, Zhen Xu, Aixian Liu, Xuqiang Guo
Summary: This study investigates the performance of isooctyl glucoside as an emulsifier for a heavy crude oil-in-water emulsion and reveals that the viscosity and stability of the emulsion increase with increasing oil content, surfactant concentration, mixing speed, mixing time, and pH of the aqueous phase. The optimal parameters result in a significant reduction in viscosity and high stability of the emulsion.
Article
Chemistry, Multidisciplinary
Shengwei Zhang, Bo Peng, Weijie Wang
Summary: A temperature-responsive biohydrogel-based carrier (XLK) was designed to protect PS from adsorption onto geological features. XLK was a gel at room temperature and transformed into a sol above a certain temperature, releasing PS into the surrounding medium. The addition of hydrolyzed polyacrylamide (HPAM) decreased the melt rate of XLK and the interfacial tension (IFT) of PS, while KCI had the most significant effect of lowering the shear modulus of HPAM.
Article
Energy & Fuels
Yingwei Si, Yangwen Zhu, Tao Liu, Xinru Xu, Jingyi Yang
Summary: In this study, a boron-containing anionic-nonionic surfactant (SYW) was synthesized and used for emulsification viscosity reduction research on Xinjiang heavy oil. SYW showed a viscosity reduction rate of 97.3%. By compounding SYW with oleic acid and ethanolamine, the resulting surfactant SYG further improved the viscosity reduction rate to 98.6%. Both SYW and SYG significantly reduced interfacial tension and improved the dispersion of the emulsion.
Article
Chemistry, Physical
Hao Ma, Shuqian Xia, Ning Li, Tongyu Wang, Wangang Zheng, Tiantian Yu, Qinglin Shu, You Han
Summary: This study synthesized two types of polymers and compounded them with surfactant to reduce the viscosity of heavy crude oil. The results showed that the surfactant-polymer composite system had advantages in emulsifying stability, with a water segregation rate of 60.6% and a viscosity reduction rate of more than 92.1% after optimization. The electrostatic interaction played a major role in the emulsion systems, and the presence of divalent cations affected the conformation of the water-soluble polymer. The variations in interaction energy in salt solutions led to experimental and simulated differences, ultimately determining the emulsifying properties of heavy crude oil. This research provides insights into the interactions and influences of complex mixtures in oil-water systems and facilitates the design and application of innovative chemical additives in heavy crude oil extraction and transportation.
JOURNAL OF MOLECULAR LIQUIDS
(2022)
Article
Energy & Fuels
Shengfei Zhang, Jin Huo, Xinge Sun, Fengxiang Yang, Ping Wang, Jianxun Wu, Yahe Zhang, Quan Shi
Summary: Karamay heavy oil in China stands out with its low asphaltene content and high viscosity index, making it ideal for use as a lubricant base oil. The unique chemical composition of the oil presents advantages and challenges in terms of its properties and potential applications.
Article
Energy & Fuels
Xiaoxiao Li, Xiang'an Yue, Zhen Wang, Rongjie Yan, Yabing Guo
Summary: The study revealed that increasing flow rate can facilitate oil film detachment, but the effectiveness is limited by the action area and displacement efficiency. Different surfactants with varying interfacial tensions and emulsification behaviors were found to promote the dislodging of the oil film.
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, Physical
Yang Yang, Xing Liang, Xiaobing Li
Summary: This study investigates the interactions between different components of crude oil and soil, finding that higher polarity components require higher temperatures for thermal desorption and generate greater energy and force at the oil-soil interface. These findings provide guidance for the separation of highly polar crude oil from soil.
JOURNAL OF MOLECULAR LIQUIDS
(2023)
Article
Engineering, Chemical
Xiaoxiao Li, Xiang'an Yue, Jirui Zou, Rongjie Yan
Summary: This study proposes a novel method for evaluating emulsion generation and stability in oil-water systems and designs a new instrument for visualizing emulsion presence and separation. Quantitative methods accurately assess emulsification capability and emulsion stability, and distinguish differences between different oil-water samples. These parameters are of great significance for enhancing oil recovery.
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
(2022)
Article
Chemistry, Multidisciplinary
Haijun Luo, Jiangbo Wen, Rong Jiang, Qianqian Shao, Zhihua Wang
Summary: This study investigates the influence of water cut on the viscosity characteristics of crude oil emulsion and establishes a prediction model for the phase inversion point. The results show that the viscosity of stable W/O emulsion decreases with increasing shear rate and temperature while increasing with the water cut. The viscosity of unstable O/W emulsion decreases with increasing shear rate, water cut, and temperature. The prediction model based on crude oil physical properties achieves a mean relative deviation of 2.9%.
Article
Energy & Fuels
Kaili Liao, Zhangkun Ren, Lipei Fu, Fei Peng, Lujun Jiang, Wanyi Gu, Xiang Zhang, Jinmei Bai, Yanfeng He
Summary: This paper systematically studied the influencing factors of dispersion stability of water-based graphene oxide (GO) nanofluid and investigated its oil displacement potential. The results showed that the amphoteric surfactant CAD had good dispersion stability for GO and improved crude oil recovery.
JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING
(2022)
Article
Chemistry, Multidisciplinary
Jierui Li, Weidong Liu, Guangzhi Liao, Linghui Sun, Sunan Cong, Ruixuan Jia
JOURNAL OF CHEMISTRY
(2019)
Article
Energy & Fuels
Jierui Li, Weidong Liu, Sunan Cong, Yalong Li, Kai Zheng, Xun Luo, Wenbo Luo, Xiangdong Su
Summary: The study screened a stable water-in-oil emulsion suitable for surfactant-polymer flooding through ultrasonic emulsification experiments, and investigated its transport characteristics in conglomerate cores. It was found that when the emulsion flows in heterogeneous parallel conglomerate cores, it has conformance control.
JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING
(2022)
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.
