Article
Thermodynamics
G. Beltramino, L. Rosso, R. Cuccaro, V. Fernicola
Summary: In this work, accurate measurements of the vapor-liquid equilibrium of heavy water along the saturation line were conducted in the temperature range of 256 K to 286 K, where heavy water is in its supercooled state. A comparison between the experimental measurements in this study and existing literature data was carried out along with the recent D2O vapor pressure formulation. Discussions on measurement results and estimation of uncertainty sources were also included.
JOURNAL OF CHEMICAL THERMODYNAMICS
(2021)
Article
Geochemistry & Geophysics
Samuel Chapman, Jan V. M. Borgomano, Beatriz Quintal, Sally M. Benson, Jerome Fortin
Summary: This study investigates seismic attenuation in partially saturated rocks through experiments and numerical simulations. The results demonstrate significant attenuation and modulus dispersion due to the heterogeneous gas distribution during fluid pressure diffusion. The numerical solutions closely match the experimental data.
JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH
(2021)
Article
Instruments & Instrumentation
Yoshiyuki Okuda, Kenta Oka, Yusuke Kubota, Mako Inada, Naoki Kurita, Kenji Ohta, Kei Hirose
Summary: This study reports the first impedance and electrical conductivity (EC) measurements of transparent minerals under high-pressure and high-temperature conditions using a new impedance measurement technique. The method allows for the observation of phase transitions and measurement of insulation properties of materials, which is important for understanding dynamical phenomena in planetary interiors.
REVIEW OF SCIENTIFIC INSTRUMENTS
(2022)
Article
Geochemistry & Geophysics
Peiqiang Zhao, Lianbo Zeng, Yuting Hou, Cong Hu, Yueli Wang, Wei He, Zhiqiang Mao
Summary: This study explores the impact of resistivity on wettability and presents a new experimental method for accurate identification of fluid types. Experimental results demonstrate that the resistivity index is highly accurate in distinguishing oil-wet rocks from water-wet rocks.
Article
Chemistry, Physical
Kai Li, Mohammadamin Sharifnik, Karl-Heinz A. A. Wolf, William R. Rossen
Summary: In this study, foam coarsening in model fractures with different roughness was experimentally investigated. The results suggest that the internal structure of fractures can impact the coarsening process of foam.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2021)
Article
Engineering, Chemical
Yunjiang Cui, Jun Ming, Xinlei Shi, Wangwang Yang, Zhansong Zhang, Chong Zhang
Summary: The purpose of this research was to develop and validate a method for calculating a reservoir core-bound water saturation ratio using the cast thin section. By performing image enhancement and thresholding, the pore-specific parameters of the thin section were obtained. The bound water saturation of the rock was then calculated based on the film water thickness and the critical pore throat radius.
Article
Environmental Sciences
Aderonke O. Adegbule, Tohren C. G. Kibbey
Summary: The unsaturated zone of the subsurface plays a critical role in environmental fate and transport, as well as plant growth. Previous research suggests that the capillary pressure-saturation relationship is influenced by a dynamic equilibrium between capillary forces and phenomena driven by evaporation. This study further investigates the role of evaporation in this relationship, finding that evaporation affects the saturation of water in the unsaturated zone and exhibits seasonal variations.
Article
Materials Science, Multidisciplinary
Qikai Guo, Cesar Magen, Marcelo J. Rozenberg, Beatriz Noheda
Summary: Efforts to understand metallic behavior have led to important concepts, but a unified description of metallic resistivity is still missing. An empirical analysis shows that the parallel resistor formalism used in cuprates can provide a phenomenological description of electrical resistivity in all metals. Two terms of the Taylor expansion of resistivity, detached from their physics origin, are shown to correspond to the T-linear and T-quadratic dependence of electron scattering rates.
Review
Engineering, Marine
Qiang Chen, Nengyou Wu, Changling Liu, Changchun Zou, Yang Liu, Jianye Sun, Yanlong Li, Gaowei Hu
Summary: Natural gas hydrate is widely distributed in marine environments and has great energy potential. Resistivity is a reliable method for deriving the characteristics of gas hydrate reservoirs, although it is influenced by the anisotropy of the reservoirs and drilling technology. The specific resistivity change depends on sediment lithology and hydrate saturation. Clay minerals are a limiting factor for accurately estimating hydrate saturations using in situ resistivity measurements. There is a need for widely representative models to correct for errors in resistivity measurements. More complex resistivity measurements may provide additional electrical response information on different gas hydrate systems.
JOURNAL OF MARINE SCIENCE AND ENGINEERING
(2022)
Article
Energy & Fuels
Wei Xu, Hang Huang, Shi-Zhen Ke, Jin-Peng Li, Hai-Feng Zhang, Yu-Bo Hu
Summary: A new double integral method is proposed to evaluate the centrifuge capillary pressure of long tight sandstone samples. The method considers the changes of capillary length and interface of wetting phase and non-wetting phase fluids, resulting in more accurate and consistent results compared to the traditional method.
Article
Geochemistry & Geophysics
Meryem Berrada, Richard A. Secco, Wenjun Yong
Summary: The study investigated the effect of the core thermal conductivity on heat flow along the adiabat using direct measurements of electrical resistivity of Fe 8.5Si. Unexpected behavior at low temperatures between 6-8 GPa may indicate an undocumented phase transition. The adiabatic heat flow at the core side of Mercury's core-mantle boundary is estimated to be considerably higher compared to most models of Fe-S or Fe-Si core, yet similar to models of an Fe core.
EARTH AND PLANETARY SCIENCE LETTERS
(2021)
Article
Chemistry, Physical
Renzhan Zhou, Qiang Li, Jiandong Wang, Kewen Zhou, Rui He, Chuanqing Fu
Summary: The newly proposed modified non-contact electrical resistivity measurement method was utilized to assess the resistivity of concrete and cement mortar. The obtained results of electrical resistivity, capillary porosity, and oxygen diffusion coefficient were found to be quantitatively correlated and can be estimated using simple equations, providing important guidelines for research and evaluation.
Article
Chemistry, Analytical
Junghee Park, Jong-Sub Lee, Jongmuk Won, Jongchan Kim
Summary: The water distribution patterns play a crucial role in determining the elastic wave properties of fine sand during freeze-thaw cycles, with evaporation-driven specimens showing more heterogeneous pore-invasive ice-bonding layers. These patterns can impact soil properties even with identical global water saturation, highlighting a clear transition from capillary-controlled to cementation-controlled elastic wave properties.
Article
Multidisciplinary Sciences
Leila Hashemi, Martin Blunt, Hadi Hajibeygi
Summary: This study presents a systematic pore-scale modelling approach to quantify crucial reservoir-scale functions related to underground hydrogen storage, and assesses their dependencies on fluid and reservoir rock conditions. A rigorous sensitivity analysis was conducted to quantify the impacts of uncertain fluid and rock properties in the absence of sufficient experimental data.
SCIENTIFIC REPORTS
(2021)
Article
Chemistry, Multidisciplinary
Joanna Badr, Elie Mahfoud, Geraldine Villain, Jean-Paul Balayssac, Sergio Palma Lopes, Yannick Fargier, Beatrice Yven
Summary: In this paper, the influence of temperature and saturation degree on electrical resistivity measurement in concrete structures is studied. The experimental results are analyzed using well-established empirical models, and calibration curves linking resistivity to saturation degree are discussed. It is important to master the temperature correction laws of resistivity measurement for evaluating water saturation degree gradients in concrete structures under real conditions.
APPLIED SCIENCES-BASEL
(2022)
Article
Electrochemistry
Mohamed S. El-Deab, Mohamed Awad, Aya Md Saada, Attia M. Attia
Summary: The study explores the impact of operating hydrodynamic and structural parameters on metal deposition current distribution in flow-through porous reactors. It finds that lower electrolyte resistivity and higher flow rates lead to more uniform current distribution, while increased electrode thickness results in less uniformity. The results are explained using existing electrochemical theory and the development of a dimensionless ohmic index.
INTERNATIONAL JOURNAL OF ELECTROCHEMICAL SCIENCE
(2021)
Article
Chemistry, Multidisciplinary
Shimaa M. Elsaeed, Elsayed Gamal Zaki, Walaa A. E. Omar, Ahmed Ashraf Soliman, Attia Mahmoud Attia
Summary: Novel guar gum-based hydrogels, developed by graft copolymerization with different co-monomers and cross-linking, exhibited excellent performance for enhanced oil recovery in high-salinity reservoirs. The hydrogels showed a notable influence on delaying water breakthrough in polymer flooding experiments, achieving maximum oil recoveries of over 70% in secondary and tertiary recovery processes.
Article
Energy & Fuels
Hamed Aboelkhair, Pedro Diaz, Attia Attia
Summary: This study investigated the production of biosurfactants by indigenous bacteria isolated from Egyptian oil fields, focusing on optimizing surface activity through different nutrient media and examining growth and surface activity under varying conditions. Bacillus spp was selected for its potential in MEOR, showing significant reduction in surface tension and interfacial tension. The study revealed Bacillus spp's ability to produce effective biosurfactants in a new proposed nutrient medium H.
JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING
(2022)
Article
Chemistry, Multidisciplinary
Abdelrahman Gouda, Samir Khaled, Sayed Gomaa, Attia M. Attia
Summary: Successful drilling operations require optimal well planning and mud programs, with AI-based models playing a role in estimating mud rheological properties. The proposed artificial neural network models exhibited outstanding performance compared to existing models, with high accuracy and replicability.
Article
Chemistry, Multidisciplinary
Sayed Gomaa, Ahmed Ashraf Soliman, Abdulrahman Mohamed, Ramadan Emara, Attia Mahmoud Attia
Summary: This paper develops two techniques to estimate water saturation by using data sets from carbonate core samples, achieving higher accuracy in calculating water saturation. The proposed artificial neural network model performs exceptionally well in estimating water saturation.
Article
Energy & Fuels
Sayed Gomaa, Ahmed Ashraf Soliman, Karim Nasr, Ramadan Emara, A. N. El-Hoshoudy, Mahmoud Attia Attia
Summary: This research uses artificial neural network models to calculate the areal sweep efficiency for different displacement patterns and proposes new models for calculating the areal sweep efficiency for the nine-spot injection pattern.
Article
Energy & Fuels
Hamed Aboelkhair, Pedro Diaz, Attia Attia
Summary: This study successfully produced effective biosurfactants with optimal surface and emulsification activities by incubating selected bacterial strains isolated from Egyptian oil fields. The stability of the produced biosurfactants under harsh reservoir conditions was high, and they showed a significant potential in enhancing oil recovery without posing any environmental risks.
JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING
(2022)
Article
Chemistry, Multidisciplinary
George E. Azmi, Aya M. Saada, Eissa M. Shokir, Mohamed S. El-Deab, Attia M. Attia, Walaa A. E. Omar
Summary: Chemical flooding using polymer and surfactant is commonly used in oilfields for enhanced oil recovery. This study investigates the adsorption of xanthan gum and sodium dodecylbenzenesulfonate on rock surfaces and the influence of concentration and reservoir salinity on adsorption capacity. The addition of nanosilica particles to the displacement fluids is also explored. Results show that increasing chemical concentration leads to increased adsorption on the rock surface, and permeability reduction is affected by both concentration and type of chemical used. The addition of nanosilica particles enhances adsorption on the rock surface.
Article
Chemistry, Multidisciplinary
Samir Khaled, Ahmed Ashraf Soliman, Abdulrahman Mohamed, Sayed Gomaa, Attia Mahmoud Attia
Summary: Accurate prediction of pore pressure and fracture pressure is crucial in petroleum engineering. Researchers have proposed various models using well log information, rock strength properties, or drilling data. Recently, artificial intelligence techniques have shown great performance in this field. In this study, two artificial neural network models were developed to estimate pore pressure and fracture pressure using drilling data from different lithologies. The models achieved accurate estimation and were validated using data from the Middle East.
Article
Green & Sustainable Science & Technology
Shahenda Mahran, Attia Attia, Basudeb Saha
Summary: This research focuses on the synthesis of a novel environmentally friendly, thermo-responsive amphoteric nanocomposite using waste vegetable oil (WVO) for enhanced oil recovery (EOR) applications under high-temperature and high-salinity reservoir conditions. The nanocomposite exhibits excellent viscosifying properties and achieves high oil recovery factor even at low concentrations. This study offers a new direction for the development of green EOR materials using waste vegetable oil.
JOURNAL OF CLEANER PRODUCTION
(2022)
Article
Chemistry, Multidisciplinary
John S. S. Shahat, Ahmed Ashraf Soliman, Sayed Gomaa, Attia Mahmoud Attia
Summary: The world is facing a severe energy crisis due to the increasing demand for energy surpassing its supply. Improved oil recovery techniques are needed to provide affordable energy. This research aims to establish accurate reservoir characterization techniques based on electrical rock properties obtained from logging tools. By modifying the Resistivity Zone Index equation, a new technique called Electrical Tortuosity Index (ETI) is developed, which accurately estimates rock types, flow zone indicators, permeability, tortuosity, and irreducible water saturation for uncored wells. This technique shows high accuracy compared to existing methods, with correlation coefficients of determination (R (2)) equal to 0.98 and 0.99.
Article
Chemistry, Multidisciplinary
Ahmed Ashraf Soliman, Mohammed Amr ElSahaa, Shimaa. M. Elsaeed, Elsayed Gamal Zaki, Attia Mahmoud Attia
Summary: With the increasing demand for petroleum products, oil consumption has also increased, leading to the need for finding more economical and effective ways to increase hydrocarbon production. This paper introduces an innovative method using two novel types of surfactants synthesized from sulfonamide derivatives to enhance oil recovery. The surfactants were analyzed and characterized using various spectroscopy techniques, and their effectiveness was evaluated through interfacial tension measurements. The combination of the surfactants with alkaline was also investigated. Coreflood and sandpack tests under high-salinity conditions were conducted to assess the effects of the surfactant alone and alkaline-surfactant combination on improving oil recovery. The results showed that the alkaline-surfactant flooding achieved a higher oil recovery rate compared to surfactant flooding and waterflooding, and exhibited noticeable reductions in oil-water interfacial tension and changes in rock wettability.
Article
Energy & Fuels
Ayman Mahmood, Hamed Aboelkhair, Attia Attia
Summary: Reservoir characterization and rock typing studies are essential in selecting the most suitable technique for enhanced oil recovery. Insufficient and inadequate reservoir characterization results in failures in field development plans and impacts the effectiveness of secondary and enhanced hydrocarbon recovery.
GEOENERGY SCIENCE AND ENGINEERING
(2023)
Review
Green & Sustainable Science & Technology
Dina Aboelela, Habibatallah Saleh, Attia M. Attia, Yasser Elhenawy, Thokozani Majozi, Mohamed Bassyouni
Summary: Bioenergy is now a primary choice for replacing fossil fuels and reducing GHG emissions in the short- and medium-term. The most practical method for converting biomass into biofuel is thermochemical conversion, particularly the pyrolysis process. This study investigates the pyrolysis process and operating conditions to optimize product yields and quality.
Article
Energy & Fuels
John S. Shahat, Mohamed Balaha, Mohamed S. El-Deab, Attia M. Attia
Summary: This study addresses a new approach for reservoir rocks characterization based on their electrical properties obtained from mathematical processing of well logs, achieving accuracy in rock typing and reservoir characterization through the calculation of RZI values and permeability.
