Article
Chemistry, Physical
Xin Kang, Wanli Kang, Zhe Li, Hongbin Yang, Anqing Xie, Menglan Li, Tongyu Zhu, Korobov Grigory Yurievich, Lekomtsev Alexander Viktorovich
Summary: The study investigated the stability of simulated emulsions from CO2 flooding, showing that stability increased with CO2 pressure but decreased with temperature, while NaCl concentration and pH had little effect. Solid particles had a significant impact on emulsion stability, with those dispersed in the oil phase leading to greater stability.
JOURNAL OF MOLECULAR LIQUIDS
(2021)
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
Tao Yu, Qi Li, Haixiang Hu, Yongsheng Tan, Liang Xu
Summary: This study explores the microscopic interaction process among gas phase, oil phase, and pore surfaces during CO2-N-2 combined gas flooding. The mechanism of remaining oil retention and stripping is analyzed, providing guidance for further development of remaining oil through CO2-N-2 combined gas flooding.
JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING
(2022)
Article
Energy & Fuels
Kaixiang Cui, Yufei Xia, Linlin Tian, Shuai Wang, Yongyao He
Summary: Supercritical CO2 flooding is used for enhanced oil recovery but it causes scaling problems in the reservoir. This article analyzes the water quality before and after flooding and studies the scale inhibition performance and mechanism of different inhibitors on calcium carbonate in the produced water.
PETROLEUM SCIENCE AND TECHNOLOGY
(2022)
Article
Green & Sustainable Science & Technology
Qi Liu, Jianjie Niu, Yang Yu, Chenyi Wang, Shijian Lu, Shengwei Zhang, Jing Lv, Bo Peng
Summary: Microbial enhanced oil recovery (MEOR) is an important method that utilizes microbes and their products to recover crude oil from reservoirs, with biosurfactants playing a crucial role due to their optimal interfacial properties. An optimized biosurfactant produced by Bacillus licheniformis L20 has been characterized as a series of lipopeptides, and has demonstrated promising potential for ex-situ MEOR in harsh reservoir conditions through wettability alteration and core flooding experiments.
JOURNAL OF CLEANER PRODUCTION
(2021)
Article
Engineering, Chemical
Tao Yu, Qi Li, Yongsheng Tan, Liang Xu
Summary: The interaction between crude oil and pore surfaces during CO2 and N-2 flooding plays a significant role in the process. Some crude oil is retained on the pore walls in the form of oil films. The ability of the gas phase to dissolve and strip oil films from pore surfaces depends on the mole ratio of CO2 in hydrophilic and hydrophobic systems.
CHEMICAL ENGINEERING SCIENCE
(2022)
Article
Energy & Fuels
Wenxiu Song, Dimitrios Georgios Hatzignatiou
Summary: Polymer flooding is traditionally used to achieve favorable mobility ratios and increase oil displacement efficiency. However, there are limitations such as high polymer concentration due to high oil viscosity, clay presence leading to polymer adsorption, formation brine salinity affecting polymer viscosity, and fractured formations causing sweep challenges. Mechanisms contributing to more efficient oil displacement include mobility control, improved sweep efficiency, and improved microscopic displacement efficiency. The use of nanoparticles in polymer flooding has been examined for interfacial tension reduction, wettability alteration, increased viscosity of injected polymer solution, and prevention of asphaltene precipitation.
JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING
(2022)
Article
Food Science & Technology
Julio Colivet, Vitor Augusto dos Santos Garcia, Rodrigo Vinicius Lourenco, Cristiana Maria Pedroso Yoshida, Alessandra Lopes de Oliveira, Fernanda Maria Vanin, Rosemary Aparecida de Carvalho
Summary: This study aimed to improve the properties of films based on crosslinked cassava starch by incorporating emulsions, specifically watermelon seed oil emulsion (WSOE). The incorporation of WSOE significantly affected the internal structure and roughness of the films, increased the elongation capacity, and decreased the strain at break. However, WSOE concentrations did not have a significant impact on water solubility, permeability, and X-ray diffraction, but decreased the wettability of the films. These materials have potential applications in biodegradable food packaging, controlled-release films, and edible coatings for food protection.
Article
Energy & Fuels
Qian Wang, Jian Shen, Piroska Lorinczi, Paul Glover, Shenglai Yang, Hao Chen
Summary: Miscible CO2-SAG flooding, by adding a CO2 soaking process after CO2 breakthrough, improves the recovery and permeability variation during CO2 flooding, especially in areas with low permeability and high residual oil saturation. The soaking process leads to more homogeneous distribution of permeability decline and a greater increase in permeability decline, with significant improvement in recovery observed in lower permeability cores.
JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING
(2021)
Article
Biochemistry & Molecular Biology
Vassilis Athanasiadis, Theodoros Chatzimitakos, Eleni Bozinou, Dimitris P. Makris, Vassilis G. Dourtoglou, Stavros I. Lalas
Summary: In this study, a new debittering technique for olives, invented and patented by Prof. Vassilis Dourtoglou, was used. The olives were stored under CO2 atmosphere for 15 days and then evaluated for sensory characteristics. The oil obtained from CO2-treated olives showed different volatile compounds, enhanced antioxidant activity, and better physiological properties compared to traditional olive oil.
Article
Biophysics
Jyoti Sharma, Atya Kapley, Durai Sundar, Preeti Srivastava
Summary: In this study, a biosurfactant-producing bacterium Franconibacter sp. IITDAS19 was isolated from crude oil contaminated soil and characterized. The biosurfactant was identified as a glycolipid and showed high efficacy towards different types of hydrocarbons. It can be used for enhanced oil recovery.
COLLOIDS AND SURFACES B-BIOINTERFACES
(2022)
Article
Geosciences, Multidisciplinary
Ying Yang, Xiao-Feng Zhou, Le-Yin Sun, An-Lun Wang, Jian-guang Wei, Chen-Xi Li, Xiang Ke
Summary: This study experimentally showed that immiscible CO2 can effectively mobilize oil distribution in different permeability core samples and impact displacement efficiency. With the increase of permeability, the contribution of cluster and intergranular pore oil distribution patterns to displacement efficiency increases.
FRONTIERS IN EARTH SCIENCE
(2021)
Article
Thermodynamics
Qichao Lv, Ali Rashidi-Khaniabadi, Rong Zheng, Tongke Zhou, Mohammad-Reza Mohammadi, Abdolhossein Hemmati-Sarapardeh
Summary: In this study, five machine learning models based on Gaussian process regression (GPR) and Extreme gradient boosting (XGBoost) were developed to estimate the diffusion coefficient of CO2 in heavy crude oil/bitumen. The XGBoost model demonstrated the highest precision with an R2 of 0.9998 and an average absolute percent relative error of 0.68%. The trends analysis showed that the diffusion coefficient of CO2 in bitumen is a unimodal function of gas concentration, while temperature and pressure have increasing effects on the CO2 diffusion coefficient, which were accurately predicted by the XGBoost model.
Article
Green & Sustainable Science & Technology
Yibin Liu, Qinghua Meng, Xin Zhou, Jiarong Lu, Hao Yan, Xiaobo Chen, Qingchun Yang
Summary: The Belt and Road Initiative proposed by China aims to achieve sustainable development for countries along its routes. However, the increasing CO2 concentration in the region is causing serious greenhouse effects and global warming. This study focuses on optimizing the CO2-enhanced oil recovery (CO2-EOR) process and provides a multi-objective optimization and sustainable quantitative assessment. The optimized process shows excellent technical, economic, social, livelihood, and environmental properties. This research has significant implications for CCU process simulation and can contribute to the development and optimization of CCU devices under the Belt and Road Initiative.
JOURNAL OF CLEANER PRODUCTION
(2022)
Article
Geosciences, Multidisciplinary
Zhang Qing-Fu
Summary: CO2 injection is a promising method for low-permeability reservoirs, with both economic and social benefits. Natural fractures and artificial fractures have significant influence on the pressure distribution, fluid composition, and displacement efficiency during CO2 flooding.
FRONTIERS IN EARTH SCIENCE
(2022)