Article
Polymer Science
Mohamed Adel Alzaabi, Juan Manuel Leon, Arne Skauge, Shehadeh Masalmeh
Summary: Polymer flooding as a successful chemical enhanced oil recovery method has attracted much interest in the oil industry, with injectivity of polymer solutions in porous media being a key factor. This study analyzed data from field polymer injectivity tests in a Middle Eastern reservoir under high-temperature high-salinity conditions, finding non-linear pressure response and complex rheological behavior during polymer injection.
Article
Chemistry, Multidisciplinary
Dalal Alezi, Julius J. Oppenheim, Patrick J. Sarver, Andrei Iliescu, Bhavish Dinakar, Mircea Dinca
Summary: The development of a tunable MOF for efficient atmospheric water capture across a range of uptake humidity conditions is a significant challenge. By controlling the metal and coordinating anion, the water uptake capacity can be increased and the relative humidity can be modulated.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2023)
Article
Chemistry, Physical
M. B. Abdullahi, S. R. Jufar, S. Kumar, T. M. Al-shami, B. M. Negash
Summary: Low salinity water (LSW) flooding combined with the traditional polymer flooding process (called low salinity polymer, LSP flooding) could significantly improve oil recovery efficiency. This study investigated the effect of polymer concentration, salinity, and temperature on LSP flooding, as well as the interaction between clay minerals and LSP slug. The experiments showed that LSP flooding recovered more additional oil compared to high salinity polymer (HSP) flooding.
JOURNAL OF MOLECULAR LIQUIDS
(2022)
Article
Energy & Fuels
Quan Chen, Moataz O. Abu-Al-Saud, Subhash C. Ayirala, Ali A. AlYousef
Summary: Low salinity waterflooding (LSWF) disrupts the geochemical equilibrium between formation brine and reservoir rock minerals leading to carbonate mineral dissolution. The cation exchange process softens the injected low salinity brine to maintain saturation for carbonate minerals, facilitating the propagation of mineral dissolution waves.
Article
Energy & Fuels
Khaled Z. Abdelgawad
Summary: In this paper, the application of polymer injection for enhanced oil recovery (EOR) in high viscosity and heterogeneous reservoirs is discussed. The factors affecting polymer induced permeability reduction (PIPR) are analyzed, and the importance of accurate assessment of PIPR for polymer selection and project design is emphasized.
JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING
(2022)
Article
Energy & Fuels
Mohammed Alkhamis, Abdulmohsin Imqam
Summary: The primary cement of oil and gas wells is susceptible to failure, necessitating remedial operations to restore wellbore integrity. Various materials, including cement and polymer resin, are used for wellbore integrity applications. Factors affecting injectivity of sealants, such as void size, viscosity, injection flow rate, and heterogeneity, were evaluated. Solids-free sealants like epoxy resin are recommended for wellbore remedial operations due to their Newtonian fluid behavior and ability to be injected into small voids with minimal pressure requirements.
JOURNAL OF PETROLEUM EXPLORATION AND PRODUCTION TECHNOLOGY
(2021)
Article
Chemistry, Physical
Rohit Kumar Saw, Anshuman Singh, Neetish Kumar Maurya, Ajay Mandal
Summary: Low salinity water flooding is cost-effective and environmentally friendly, and the addition of nanoparticles and polymers can significantly increase oil recovery. The viscosity of complex chemical slugs can be increased by adding nanoparticles to polymer solutions. Low salinity water requires a lower concentration of polymer to reach the target viscosity compared to high saline formation water. The addition of nanoparticles reduces interfacial tension and contact angle, leading to higher oil recovery in low salinity water. Injection of low salinity water-based complex fluid results in incremental recovery of OOIP compared to low salinity water and conventional formation water flooding.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2023)
Article
Polymer Science
Guoying Jiao, Shijie Zhu, Zhongbin Ye, Zheng Shu, Xijin Wang, Daming Wang
Summary: Polymer flooding, a technique used to recover oil from depleted reservoirs, is hindered by poor performance caused by shearing during injection. An experimental evaluation studied the influence of shearing on rheological properties, viscoelasticity, hydrodynamic size, static adsorption, and seepage characteristics of the polymer solution. Results showed that shear had an irreversible effect on the polymer, damaging its properties. However, hydrophobic association allowed the polymer to recover its solution properties after a critical associating concentration, improving shear resistance and achieving effective flow resistance during porous media seepage and mobility control. Augmenting intermolecular forces to enhance shear resistance is proposed to develop new polymer systems for oil displacement.
Article
Chemistry, Physical
Nadia Boulif, Renate Evers, Menno Houben, Zandrie Borneman, Kitty Nijmeijer
Summary: In this study, the effects of adding different weight percentages of montmorillonite materials on the performance of ion exchange membranes were investigated. The results showed that the addition of montmorillonite can improve the conductivity and permselectivity of the membranes, making them more suitable for energy storage and separation technologies.
APPLIED CLAY SCIENCE
(2023)
Article
Geochemistry & Geophysics
Wang Dongmei, Shane Namie, Randall Seright
Summary: Effective oil displacement from a reservoir requires adequate and properly directed pressure gradients in areas of high oil saturation. This study examines how the pressure-barrier concept limits the size and viscosity of the polymer bank during a polymer flood. Analytical and numerical methods are used to address this issue. The relevance of the pressure modification concept for different conditions and factors is analyzed, and the relation between the pressure-barrier concept and fractures during polymer injection is examined.
Article
Construction & Building Technology
Xiaofei Zhao, Minhaz Ur Rahman, Tharanga Dissanayaka, Farhad Gharagheizi, Carla Lacerda, Sanjaya Senadheera, Ronald C. Hedden, Gordon F. Christopher
Summary: The study investigates the effect of adding PP/PE copolymer modified asphalt binder on the ability to resist rutting in high temperatures. Results show that the PP/PE copolymer can significantly increase the rutting factor of asphalt binder within a specific temperature range, effectively reducing the risk of pavement rutting.
CASE STUDIES IN CONSTRUCTION MATERIALS
(2021)
Article
Engineering, Chemical
Fujiang Dong, Shiming Xu, Xi Wu, Dongxu Jin, Ping Wang, Debing Wu, Qiang Leng
Summary: Research shows that the PVA/SSA CEM with 20 wt% SSA content demonstrates more advantages in the RED process, with excellent mechanical and transport properties.
SEPARATION AND PURIFICATION TECHNOLOGY
(2021)
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
Engineering, Chemical
Felipe de O. Apolinario, Adolfo P. Pires
Summary: Low salinity waterflooding involves injecting water with lower salt concentration than the connate water. The pH and the amount of dissolved cations in the water affect cation exchange and residual oil mobilization. This study presents a solution for low salinity slug injection using seawater, considering three dissolved cations and pH effects. The solution shows that pH effects occur near the injection point due to high adsorption rate and creates small regions with salinity changes. The appearance of water and oil banks along the flooding is important for the design of chemical enhanced oil recovery techniques.
CHEMICAL ENGINEERING RESEARCH & DESIGN
(2023)
Article
Engineering, Chemical
Azadeh Nazif, Ehsan Saljoughi, Seyed Mahmoud Mousavi, Hamed Karkhanechi
Summary: Electrical energy can be generated by extracting energy from the mixing of two water streams with different salinity using the reverse electrodialysis (RED) technique. The design and fabrication of ion exchange membranes (IEMs) play a crucial role in enhancing the power production of the RED system. In this study, novel cation exchange membranes (CEM) were prepared using sulfonated poly (2,6-dimethyl-1,4-phenylene oxide) and MXene nanosheets for the first time, and their electrochemical properties and power output in the RED system were investigated. The CEMs with an MXene additive of 2% exhibited the highest gross power density in RED experiments compared to commercially available CMX membrane.
Article
Chemistry, Multidisciplinary
Evren Unsal, Marc Broens, Ryan T. Armstrong
Article
Computer Science, Interdisciplinary Applications
Evren Unsal, Stephan K. Matthaei, Martin J. Blunt
COMPUTATIONAL GEOSCIENCES
(2010)
Article
Chemistry, Multidisciplinary
Evren Unsal, Geoffrey Mason, Norman R. Morrow, Douglas W. Ruth
Article
Chemistry, Multidisciplinary
Paul S. Hammond, Evren Unsal
Article
Chemistry, Multidisciplinary
Paul S. Hammond, Evren Unsal
Article
Chemistry, Multidisciplinary
Paul S. Hammond, Evren Unsal
Article
Engineering, Chemical
Paul S. Hammond, Evren Unsal
TRANSPORT IN POROUS MEDIA
(2012)
Article
Environmental Sciences
Jacob H. Dane, Jasper A. Vrugt, Evren Unsal
VADOSE ZONE JOURNAL
(2011)
Article
Chemistry, Physical
E. Unsal, M. Rucker, S. Berg, W. B. Bartels, A. Bonnin
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2019)
Article
Geosciences, Multidisciplinary
Evren Unsal, Hilbert van der Linde, Ove B. Wilson
MARINE AND PETROLEUM GEOLOGY
(2020)
Article
Computer Science, Interdisciplinary Applications
Steffen Berg, Evren Unsal, Harm Dijk
Summary: The extraction of relative permeability from experimental core flooding measurements through inverse modeling with the numerical solution of the 2-phase Darcy equations is an ill-posed problem, leading to non-uniqueness, correlation of matching parameters, and non-Gaussian errors. Assisted history matching strategy, coupled with a Levenberg-Marquardt based optimization scheme, provides a realistic description of the data and associated uncertainty, potentially smaller than error from manual interpretation with tabulated relative permeability, depending on the choice of relative permeability parameterization.
COMPUTERS AND GEOTECHNICS
(2021)
Article
Engineering, Chemical
Steffen Berg, Evren Unsal, Harm Dijk
Summary: This study analyzed the impact of choosing relative permeability models and associated uncertainty on the results, comparing Corey and LET models in inverse modeling workflows. It was found that the Corey parameterization imposed more constraints on parameters, while the LET function provided more degrees of freedom to accommodate the shape of relative permeability curves. The findings also suggested that neither Corey nor LET models necessarily provide optimal parameterizations of experimental data.
TRANSPORT IN POROUS MEDIA
(2021)
Article
Chemistry, Physical
E. Unsal, G. Mason, D. W. Ruth, N. R. Morrow
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2007)
Article
Chemistry, Physical
E. Unsal, G. Mason, N. R. Morrow, D. W. Ruth
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2007)