Article
Polymer Science
Ilnur Ilyasov, Igor Koltsov, Pavel Golub, Nikolay Tretyakov, Andrei Cheban, Antoine Thomas
Summary: Polymer flooding is a mature technique for improving oilfield recovery rates. This paper discusses a study on polymer retention in unconsolidated cores in the East-Messoyakhskoe oilfield in Northern Siberia, using four polyacrylamide polymers and a dynamic retention method. The research found that polymers containing ATBS had the lowest retention values, confirming findings from other publications.
Article
Chemistry, Physical
Jianguang Wei, Yinghe Chen, Xiaofeng Zhou, Long Wang, Ping Fu, V. S. Yakushev, M. P. Khaidina, Dong Zhang, Xuedong Shi, Runnan Zhou
Summary: A significant amount of oilfields rely on water flooding for production, resulting in high water cut and necessitating enhanced oil recovery (EOR) techniques to improve recovery. Surfactant-polymer (SP) flooding, combining surfactant and polymer flooding, offers a solution by altering fluid properties. This study conducted experiments to determine the optimal SP system for high water-cut oilfields, recommending the combination of DQ-TSRP01 polymer and surfactant with specific injection parameters. The findings enhance our understanding of SP flooding in high water-cut oilfield production, offering practical insights for application.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Review
Energy & Fuels
Dongmei Wang, Randall S. Seright
Summary: This paper reviews literature on the efficacy of floods with colloidal dispersion gels (CDGs) compared to polymer floods for oil recovery. The conclusion suggests that CDGs do not provide better results than polymer floods, and highlights the misleading claims made about CDGs' effectiveness.
Article
Chemistry, Physical
Jiaming Li, Guang Zhao, Ning Sun, Lihao Liang, Ning Yang, Caili Dai
Summary: A graphite oxide nanoparticle-reinforced polymer (GORP) flooding system was constructed, showing better performance compared to conventional polymer (CP) flooding system, including improved viscosity increasing effect, shearing resistance, and aging stability. Experimental results demonstrated that the enhanced oil recovery performance of the GORP flooding system was more prominent, with a total recovery 5.04% higher than that of the CP flooding system.
JOURNAL OF MOLECULAR LIQUIDS
(2022)
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
Jinxun Wang, Abdulkareem M. AlSofi, Abdullah M. Boqmi
Summary: Polymer flooding is an effective technique for enhancing oil recovery, though it can increase project costs. Polymer retention is essential to the success of a polymer flooding project, and accurate quantification of this parameter is crucial. Research on polymer retention in carbonates has shown potential for applications in carbonate reservoirs, with reduced retention in the presence of residual oil. Wettabilty has a minor impact on polymer retention compared to the presence of oil, and residual oil and wettability have minimal impact on polymer inaccessible pore volume (IPV).
JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING
(2021)
Article
Polymer Science
Rafael E. Hincapie, Ante Borovina, Elisabeth Neubauer, Muhammad Tahir, Samhar Saleh, Vladislav Arekhov, Magdalena Biernat, Torsten Clemens
Summary: This study investigates the wettability alterations through imbibition/flooding and their synergy with interfacial tension (IFT) for alkalis, nanoparticles, and polymers. It demonstrates the influence of the oil total acid number (TAN), chemical agents, and reservoir mineralogy on fluid-fluid and rock-fluid interactions. A laboratory evaluation workflow combining various assessments is used to evaluate wettability alteration, IFT changes, and recovery. The study provides novel data on the synergy of IFT, Amott imbibition, and core floods for the studied chemical processes.
Article
Polymer Science
Rafael E. Hincapie, Ante Borovina, Torsten Clemens, Eugen Hoffmann, Muhammad Tahir, Leena Nurmi, Sirkku Hanski, Jonas Wegner, Alyssia Janczak
Summary: This work presents various evaluations of key prior field applications, combining laboratory approaches to optimize the usage of polymers and alkali. The performance of AP floods can be optimized by adjusting the polymer viscosities during injection and aging in the reservoir. AP conditions not only reduce polymer retention in the reservoir but also result in significant cost savings. Lower-concentration polymer solutions aged in alkali show the same displacement efficiency as non-aged polymers with higher concentrations.
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)
Article
Chemistry, Multidisciplinary
Hu Chen, Maximilian Moser, Suhao Wang, Cameron Jellett, Karl Thorley, George T. Harrison, Xuechen Jiao, Mingfei Xiao, Balaji Purushothaman, Maryam Alsufyani, Helen Bristow, Stefaan De Wolf, Nicola Gasparini, Andrew Wadsworth, Christopher R. McNeill, Henning Sirringhaus, Simone Fabiano, Iain McCulloch
Summary: In this study, three n-type fused lactam semiconducting polymers were synthesized via a transition-metal free aldol polycondensation method, showing progressively larger electron affinities as the central acene core size decreases. The N-N and A-N polymers exhibited the highest charge carrier mobilities and power factors among the three polymers, representing promising candidates for high-performance n-type materials in thermoelectric applications. The results highlight the effectiveness of modulating the size of the central acene ring as a molecular design strategy to optimize the electronic and thermoelectric performance of conjugated polymers.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2021)
Article
Polymer Science
Ante Borovina, Rafael E. Hincapie, Torsten Clemens, Eugen Hoffmann, Jonas Wegner
Summary: This study uses micromodels, core floods, and Field-Flow Fractionation (FFF) evaluations to understand the behavior of polymers in heterogeneous reservoirs. Different layers of micromodels were constructed to simulate varying permeability, and core tests and FFF were performed to assess the injectivity and displacement efficiency of selected polymers. The results showed that polymers with narrower molecular weight distribution had better injectivity and lower retention.
Review
Chemistry, Multidisciplinary
Emanuel X. Ricky, Grant Charles Mwakipunda, Edwin E. Nyakilla, Naswibu A. Kasimu, Chao Wang, Xingguang Xu
Summary: Carbon dioxide (CO2) has been used for over 50 years in enhanced oil recovery (EOR) to recover residual oil from geological reservoirs. However, CO2 flooding only recovers a small amount of the original oil in place (OOIP) due to factors such as low CO2 viscosity. To address this issue, effective CO2 thickeners need to be developed. Despite extensive research, no chemical has been identified as an effective CO2 thickener for EOR field applications. Therefore, future studies should focus on developing affordable and effective CO2 thickeners for EOR.
JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
(2023)
Article
Engineering, Environmental
Ketao Yan, Jinfu Chen, Liu He, Weijie Dai
Summary: The study revealed that suspended microcrystalline polymer flooding produced water has unique characteristics in terms of oil droplet diameter distribution, viscosity, and absolute zeta potential. The oil removal rate through gravity sedimentation was found to be higher compared to polymer-flooding produced water and slightly lower than high Ca and Mg polymer flooding produced water. A two-stage composite material filtration combined with gravity sedimentation was proposed as an effective and practical method for oil removal from suspended microcrystalline polymer flooding produced water based on laboratory experiments.
JOURNAL OF WATER PROCESS ENGINEERING
(2021)
Article
Materials Science, Multidisciplinary
Joshua Tropp, Dilara Meli, Ruiheng Wu, Bohan Xu, Samuel B. Hunt, Jason D. Azoulay, Bryan D. Paulsen, Jonathan Rivnay
Summary: Developing material design guidelines for organic mixed ionic-electronic conductors (OMIECs) is crucial for achieving high efficacy mixed transport in bioelectronics. This study examines the impact of molecular weight on OMIEC performance and reveals that an optimal performance is achieved within a certain range of molecular weight, which is dependent on the electrolyte used. Furthermore, the study highlights the importance of electrolyte composition, specifically with respect to cation expulsion, in preventing detrimental swelling and maintaining percolative pathways for improved performance of OMIECs.
ACS MATERIALS LETTERS
(2023)
Review
Energy & Fuels
Hamid Sharifigaliuk, Syed Mohammad Mahmood, Waleed Al-Bazzaz, Vahid Khosravi
Summary: Summary: Wettability of oil and gas shale reservoirs is a challenging property influenced by various factors, requiring a deep understanding of complexities. This review analyzes relevant research on wettability evaluation of shales, including factors such as composition, pore types, and reservoir conditions.
Review
Energy & Fuels
Hamid Sharifigaliuk, Syed Mohammad Mahmood, Maqsood Ahmad, Reza Rezaee
Summary: The use of shale outcrop analogs is often necessary when subsurface unconventional shale samples are scarce, and researchers need to be cautious about assuming the rock composition and properties of outcrop and subsurface samples are the same. The challenges of lateral and vertical heterogeneity, anisotropy, weathering, contamination, and tectonic activities further complicate the characterization of shale reservoirs using outcrop samples. In this literature-based study, the authors discuss the similarities and discrepancies in mineralogical, petrophysical, geochemical, and geomechanical properties between outcrop and subsurface shale samples.
Article
Chemistry, Multidisciplinary
Lazreg Belazreg, Syed Mohammad Mahmood, Akmal Aulia
Summary: The research aims to develop a fast and cost-effective mathematical model for evaluating the incremental recovery factor of WAG injection, designing pilots, and upscaling pilot results. It involves literature review, modeling, and machine learning techniques, resulting in successful development of mathematical models for HC-IWAG incremental recovery factor.
Review
Energy & Fuels
Funsho Afolabi, Syed M. Mahmood, Nurudeen Yekeen, Saeed Akbari, Hamid Sharifigaliuk
Summary: Polymeric surfactants have emerged as a viable alternative to conventional chemical methods in enhancing hydrocarbon recovery, offering multifunctional mechanisms such as viscosity increment and interfacial tension reduction for improved mobility control and fluid redistribution.
JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING
(2022)
Article
Energy & Fuels
Hamid Sharifigaliuk, Syed Mohammad Mahmood, Maqsood Ahmad, Vahid Khosravi, Dalibor Matysek
Summary: The study compared the efficacy of traditional techniques, including contact angle, spontaneous imbibition, and floatation, in determining the wettability of Eagle Ford, Mancos, and Marcellus shale samples. It was found that the spontaneous imbibition method was most effective in evaluating the mixed-wet characteristics of the Marcellus shale samples.
JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING
(2022)
Review
Energy & Fuels
Shahrul Aida Ab Rasid, Syed M. Mahmood, Nor Idah Kechut, Saeed Akbari
Summary: Oil presence decreases foam stability, while increasing NP concentration, decreasing NP size, temperature, NP retention, and salinity lead to increased stability. Optimum points exist for parameters like NP surface wettability, NP types, and shear rate/flow velocity for best foam performance. NP loss in a porous medium is an economically damaging process, and identifying mechanisms and strategies for minimizing their influence is crucial for future research.
JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING
(2022)
Article
Chemistry, Multidisciplinary
Sameer Al-Hajri, Berihun M. Negash, Md Motiur Rahman, Mohammed Haroun, Tareq M. Al-Shami
Summary: The study demonstrates that silica nanoparticles can significantly reduce the adsorption of polymers in the Marcellus shale formation, while improving polymer rheology, especially at elevated temperatures. Polymer adsorption is mainly influenced by polymer concentration, rather than salinity variations.
Review
Chemistry, Multidisciplinary
Sameer Al-Hajri, Berihun M. Negash, Md Motiur Rahman, Mohammed Haroun, Tareq M. Al-Shami
Summary: This paper summarizes the literature on the use of polymers in hydraulic fracturing and discusses current issues, efforts, and trends in the field. The role and limitations of polymers in fracturing fluids are also reviewed. The research suggests that polymers are important additives in fracturing fluids, providing adequate proppant transportation and determining fracture width. The development of synthetic polymers and associative polymers shows potential for improving the stability of fracturing fluids in unconventional reservoirs.
Article
Energy & Fuels
Hamid Sharifigaliuk, Syed Mohammad Mahmood, Reza Rezaee, Funsho Ayobami Afolabi, Izhar Ul Haq
Summary: The pore characteristics of shale and clay samples were analyzed, and the effect of shale particle size on methane sorption capacity and diffusion was investigated.
Article
Chemistry, Multidisciplinary
Sameer Al-Hajri, Daniel Bahamon, Md Motiur Rahman, Mohammed Haroun, Lourdes F. Vega
Summary: This study focuses on developing a molecular modeling approach to study the properties of silica surfaces and quartz cement interfaces. Molecular dynamics simulations were conducted to investigate the cohesion and adhesion properties. Results show that adhesion pressure depends on the area density and degree of ionization, and van der Waals forces are the major contributor to the interactions between the cement and silica surfaces. Additionally, the study demonstrates the potential of using MD simulations to understand the chemomechanics relationship in cement-surfaces of reservoir rocks and predict rock mechanical failure.
Article
Engineering, Chemical
Vahid Khosravi, Syed Mohammad Mahmood, Swee Pin Yeap
Summary: Recently, discussions have been raised on the cause of changing wettability during brine salinity engineering. This study aims to understand the reason behind wettability changes by introducing a novel approach involving monovalent and divalent ions. Molecular dynamics simulations were used to investigate the physiochemical interactions responsible for wettability modification. The results showed the significant influence of oil polarity and the role of sodium ions in wettability alteration.
CHEMICAL ENGINEERING RESEARCH & DESIGN
(2023)
Article
Energy & Fuels
Hamid Sharifigaliuk, Syed Mohammad Mahmood, Mansoor Zoveidavianpoor, Davood Zivar, Funsho Ayobami Afolabi
Summary: Understanding the invasion and flowback processes of water is crucial for evaluating and developing complex gas shale formations. This study investigates the dynamic rock-fluid properties of a Mancos shale sample through water imbibition and flowback experiments. The results show that water entrapped in shale rocks leads to low flowback rates, and the continuous imbibition of water enhances gas production. An optimum shut-in time is predicted to avoid delays in production operations.
Article
Materials Science, Multidisciplinary
Vahid Khosravi, Syed Mohammad Mahmood, Lizrina Ludai Anak Jeffry, Swee Pin Yeap, Tarek Al Arbi Omar Ganat, Amir Rostami
Summary: This study investigates wettability alteration in fluid-surface studies of oil reservoirs, particularly in carbonate reservoirs, using molecular dynamics simulation. The findings highlight the influence of oil polarity and brine ions on oil detachment and movement on mineral surfaces. The results contribute to the development of Smart Water flooding technology.
INTERNATIONAL JOURNAL OF COMPUTATIONAL MATERIALS SCIENCE AND ENGINEERING
(2023)
Article
Energy & Fuels
Muhammad Ayoub, Mysara Eissa Mohyaldinn, Syed Mohammad Mahmood, Aqsha Aqsha, Shiferaw Regassa Jufar, Sarah Farrukh, Farrukh Inayat, Muhammad Rashid Shamsuddin
JOURNAL OF PETROLEUM EXPLORATION AND PRODUCTION TECHNOLOGY
(2020)
Article
Energy & Fuels
Lazreg Belazreg, Syed Mohammad Mahmood
JOURNAL OF PETROLEUM EXPLORATION AND PRODUCTION TECHNOLOGY
(2020)
