Article
Energy & Fuels
Yimin Zhang, Chengyan Lin, Lihua Ren
Summary: This study investigates the flow patterns and the effects of pore structure parameters on residual oil during water flooding and CO2 flooding processes using advanced scanning and digital rock techniques. The results reveal that CO2 flooding significantly improves sweep efficiency and reduces residual oil saturation compared to water flooding. Additionally, capillary forces play a critical role in the displacement of trapped oil during CO2 flooding.
Article
Water Resources
Leila Hashemi, Wuis Glerum, Rouhi Farajzadeh, Hadi Hajibeygi
Summary: Accurate quantification of hydrogen transport characteristics in subsurface porous formations is crucial for underground hydrogen storage. This study characterizes the contact angles of hydrogen in contact with brine and sandstones, providing important data for research in this field.
ADVANCES IN WATER RESOURCES
(2021)
Article
Energy & Fuels
Cut Aja Fauziah, Ahmed Al-Yaseri, Emad Al-Khdheeawi, Nilesh Kumar Jha, Hussein Rasool Abid, Stefan Iglauer, Christopher Lagat, Ahmed Barifcani
Summary: The study aims to evaluate the wettability of sandstone samples at different pressures and temperatures, before and after CO2 injection. The results show that the contact angles of the sandstone samples increase with pressure, indicating that the sandstones become more CO2-wet after CO2 injection.
Article
Energy & Fuels
Masoumeh Amiri, Mobeen Fatemi, Ebrahim Biniaz Delijani
Summary: The study investigates the effects of the hybrid application of low-salinity and polymer on the properties of brine/rock and brine/oil interfaces. Experimental results show that the aqueous salinity and polymer concentration have an influence on the interfacial tension, wettability, and zeta potentials.
Article
Multidisciplinary Sciences
Ahmed Farid Ibrahim, Salaheldin Elkatatny
Summary: This study proposes the use of machine learning techniques to estimate the contact angle of shale, providing a more efficient alternative to traditional laboratory methods. By considering shale properties, operating conditions, and brine salinity, a dataset was collected and used to train artificial neural network (ANN) and adaptive neuro-fuzzy inference system (ANFIS) models. The results show that the ANN model performed the best in predicting the contact angle.
SCIENTIFIC REPORTS
(2023)
Article
Energy & Fuels
Ziqiang Qin, Maziar Arshadi, Mohammad Piri
Summary: Recent advances in micro-CT technology have enabled studying multiphase flow in natural porous media at the pore scale. Experimental results in oil-wet carbonates showed that tertiary CWI and in situ CO2 exsolution can reduce remaining oil saturation left after water flooding. Furthermore, in situ contact angle measurements provided direct evidence of wettability reversal towards reduced oil wetness due to CWI.
Article
Materials Science, Multidisciplinary
Xuan Zhang, Wei Zhang
Summary: In this study, a novel in situ wetting measurement method using electron beam irradiation in transmission electron microscopy is proposed, which enables dynamic observation of the wetting process between nanosolder and nanomaterial, rapid measurement of the contact angle, and avoids complex procedures in traditional methods. Experimental tests show that the obtained contact angle using the new method is consistent with the traditional method, indicating its potential in promoting the application of nanosolders in nanosoldering.
SCIENCE AND TECHNOLOGY OF WELDING AND JOINING
(2023)
Review
Thermodynamics
Masoud Aslannezhad, Muhammad Ali, Azim Kalantariasl, Mohammad Sayyafzadeh, Zhenjiang You, Stefan Iglauer, Alireza Keshavarz
Summary: Hydrogen is considered a clean fuel for mitigating climate change by reducing greenhouse gas emissions, but large-scale storage of hydrogen is a challenge due to its compressibility, volatility, and flammability. This review focuses on the wettability of hydrogen in geological formations as a potential storage solution. It discusses the influence of parameters such as salinity, temperature, pressure, surface roughness, and formation type on wettability and storage capacity. The review also discusses the effect of organic material and presents influential parameters affecting storage safety. Overall, this review provides valuable insights for understanding hydrogen storage challenges and identifying storage solutions.
PROGRESS IN ENERGY AND COMBUSTION SCIENCE
(2023)
Article
Energy & Fuels
Abubakar Isah, Mohamed Mahmoud, Muhammad Arif, Murtada Al Jawad, Abduljamiu O. Amao
Summary: Contact angle is a measurement of the wettability of solid surfaces, and the wettability of rock/oil/brine systems can be modified by using solvents for surface cleaning. This study found that different solvents used for cleaning the rock surface can have different effects on the wettability of the rock/oil/brine system.
Article
Geosciences, Multidisciplinary
Rossen Sedev, Hamed Akhondzadeh, Mujahid Ali, Alireza Keshavarz, Stefan Iglauer
Summary: Rock wettability is a key factor in the storage of hydrogen, affecting its capacity and safety. The study found that under realistic storage conditions, the surface of bituminous coal exhibited weak water-wettability. The pressure of hydrogen increased the contact angles of brine on the coal surface at 25 degrees C but had no impact at higher temperatures. A thermodynamic model was proposed to describe the observed behavior, supporting the development of large-scale geostorage technologies for hydrogen.
GEOPHYSICAL RESEARCH LETTERS
(2022)
Article
Geochemistry & Geophysics
Stanislav Glubokovskikh, Pavel Shashkin, Serge Shapiro, Boris Gurevich, Roman Pevzner
Summary: Passive seismic monitoring using distributed acoustic sensing (DAS) is recommended for risk mitigation in CO2 storage projects. A field study in Australia showed that DAS enabled high-precision tracking of induced seismicity triggered by CO2 injection. The study detected 17 microseismic events and observed a correlation between the seismic activity and the movement of the CO2 saturation plume front. DAS observations also revealed the signature of fluid-rock interaction.
SEISMOLOGICAL RESEARCH LETTERS
(2023)
Article
Nanoscience & Nanotechnology
Weiyin Chen, Winston Wang, Duy Xuan Luong, John Tianci Li, Victoria Granja, Paul A. Advincula, Chang Ge, Yieu Chyan, Kaichun Yang, Wala A. Algozeeb, C. Fred Higgs, James M. Tour
Summary: This study develops a solvent-free sand-in method to fabricate superhydrophobic surfaces with robust properties. These surfaces exhibit excellent anti-icing ability and can be repaired through re-sanding.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Chemistry, Physical
Chao-Chun Hsu, Feng-Chun Hsia, Bart Weber, Matthijn B. de Rooij, Daniel Bonn, Albert M. Brouwer
Summary: When two macroscopic objects touch, the contact is composed of multiple surface asperities that deform under pressure. Applying a shear force breaks the initial contact and causes sliding. The use of a fluorogenic mechanophore allows for visualization and quantification of the local interfacial shear force. The macroscopic coefficient of friction accurately describes the microscopic friction.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2022)
Article
Chemistry, Physical
Chao-Chun Hsu, Feng-Chun Hsia, Bart Weber, Matthijn B. de Rooij, Daniel Bonn, Albert M. Brouwer
Summary: When two macroscopic objects touch, their real contact is often made up of multiple surface irregularities, which deform under pressure. Shear force causes the objects to slide and breaks the initial contact. This study uses a fluorescent mechanophore to visualize and quantify local interfacial shear force, and investigates the evolution of microscopic shear force from static to dynamic friction. The findings show that the macroscopic coefficient of friction accurately describes microscopic friction, and that sliding begins at the edge and propagates towards the center of the contact area.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2022)
Review
Energy & Fuels
Nurudeen Yekeen, Eswaran Padmanabhan, Hesham Abdulelah, Sayed Ameenuddin Irfan, Oluwagade Adenike Okunade, Javed Akbar Khan, Berihun Mamo Negash
Summary: This study critically reviewed previous literature on CO2/brine interfacial tension and wettability of rock/CO2/brine systems. Laboratory experiments conducted on shale cores from Malaysian formation showed that the wettability of rock surfaces and CO2/brine interfacial tension changed with increasing temperature, pressure, and salinity. Such changes will greatly impact hydrocarbon recovery and CO2 containment security in Malaysian unconventional shale formations.
JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING
(2021)
Article
Energy & Fuels
Jianchun Xu, Wenxin Zhou, Hangyu Li, Xiaopu Wang, Shuyang Liu, Ling Fan
Summary: The study evaluated the impact of key parameters in the StoSAG optimization process, including ensemble size, step size, cut number, perturbation size, and initial position. Results showed that larger ensemble size and increased search step size were favorable for optimization results, but a large step size needed to match a larger cut number. Moreover, the increase of cut number was beneficial for local searchability but also increased the risk of falling into local optima. Random initial position was found to be helpful in finding the global optimal point.
JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING
(2022)
Article
Engineering, Environmental
Yang Zhao, Yanzhen Liu, Hongsheng Dong, Chong Chen, Tianxiang Zhang, Lei Yang, Lunxiang Zhang, Yu Liu, Yongchen Song, Jiafei Zhao
Summary: This paper proposes a new method for coating inhibitors, which allows for the magnetic recovery of inhibitory particles and demonstrates good cycle performance. The experimental results show that this method can effectively extend the formation time of hydrates and solve pipeline blockage issues by preventing further growth of hydrates.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Thermodynamics
Yanji Wang, Hangyu Li, Jianchun Xu, Shuyang Liu, Xiaopu Wang
Summary: This paper presents a machine learning assisted relative permeability upscaling method, which performs flow-based upscaling on a small portion of coarse blocks (or interfaces) and quickly computes upscaled relative permeability functions for the rest of coarse blocks (or interfaces) using machine learning algorithms. Numerical results have shown that the coarse-scale simulation results using the proposed method are similar in accuracy to the results obtained using full numerical upscaling.
Article
Thermodynamics
Kai Zhang, Hon Chung Lau, Shuyang Liu, Hangyu Li
Summary: This study evaluates offshore carbon capture and storage opportunities in the coastal region of China, indicating ample CO2 storage potential to cover years of CO2 emissions and is suitable for offshore CCS projects.
Article
Energy & Fuels
Zeshao You, Peng Wu, Xiang Sun, Yu Liu, Tao Li, Yanghui Li
Summary: This study investigates the strengthening mechanisms of hydrate-bearing sediments under different hydrate distributions using the discrete element method. The results show that randomly distributed hydrates enhance the peak strength of the sediment, while gathered hydrates contribute to the residual strength.
Article
Energy & Fuels
Lanlan Jiang, Zucheng Cheng, Shaohua Li, Nan Xu, Huazheng Xu, Jiafei Zhao, Yu Liu, Minghao Yu, Yongchen Song
Summary: This study systematically investigated the hydrate formation kinetics of CH4-THF under static conditions and found that higher temperature and lower undercooling promoted CH4 storage and hydrate formation. The proportion of CH4 in small cages of sII hydrates increased with temperature. The study also revealed that lowering undercooling and increasing temperature reduced energy consumption during hydrate formation. These findings provide important insights into the storage and transportation of natural gas via the solid hydrate method.
Article
Energy & Fuels
Zhiqiang Wang, Shuyang Liu, Hangyu Li, Shuxia Li, Jianchun Xu, Xiaopu Wang
Summary: This study investigates the characteristics and driving forces of hydrate reformation during the dissociation process induced by depressurization using a coupled thermal-hydraulic-chemical (THC) model. The results show that hydrate reformation mainly occurs near the production wellbore and the cooling driving force is the main controlling mechanism. Based on the analysis, controlling the production pressure or using hot brine injection or wellbore heating is suggested to prevent hydrate reformation.
Article
Mechanics
Feng Liu, Zhuangzhuang Wu, Pengfei Lv, Wei Yang, Yi Zhou
Summary: This study investigated the topological features of homogeneous isotropic turbulence with an inverse energy cascade through direct numerical simulation. The inverse energy cascade was induced by reversing the velocity field of freely decaying isotropic turbulence. The joint probability density function of Q and R, the second and third invariants of the velocity gradients tensor, exhibited a novel shape during the backward energy transfer process. The dominance of specific quadrants in the joint PDF indicated that the turbulence with an inverse energy cascade is characterized by vortex compression and tube-like structures. The PDF of the intermediate eigenvalue of the strain-rate tensor in the inverse energy cascade displayed a negative skewness, opposite to the universal feature of the forward energy cascade. However, the preferential alignment of vorticity with the intermediate eigenvector remained robust regardless of the direction of energy transfer. The numerical results in this study are expected to provide insights into the dynamics and mechanisms of inverse energy cascade by analyzing the relationship between velocity gradient invariants and local flow topology.
Article
Mechanics
Pengfei Lv, Yu Liu, Feng Liu, Wenzhe Yang, Yahui Wang, Hantao Liu, Yongchen Song
Summary: The geometric structure variation of the nonwetting phase (NWP) in porous media plays a critical role in energy-related processes. This study used high resolution x-ray microcomputed tomography (micro-CT) to investigate the morphological and topological characteristics of NWP during gas/liquid displacements in three different rock cores. It was found that roof and distal snap-off occurred during drainage, resulting in nonwetting singlets and ganglia. Throat snap-off and pore snap-off were observed during imbibition, occurring at a single-pore scale. The trapped NWP during primary drainage can be displaced in main imbibition through snap-off events or viscous remobilization.
Article
Thermodynamics
Kunpeng Xue, Yu Liu, Tao Yu, Lei Yang, Jiafei Zhao, Yongchen Song
Summary: An accurate description of reservoir characteristics is crucial for the precise prediction of gas production from natural gas hydrate deposits. Previous studies assumed homogeneous permeability in large-scale NGH production cases, but this work established a multi-layered heterogeneous-permeability reservoir model and analyzed gas production behavior using the TOUGH + HY-DRATE simulator. It was found that scatter distribution of hydrate and free gas occurs in this reservoir model, and reservoirs with heterogeneous permeability perform better than homogeneous ones.
Editorial Material
Chemistry, Multidisciplinary
Hangyu Li, Xianzhi Song, Shuyang Liu
APPLIED SCIENCES-BASEL
(2023)
Article
Energy & Fuels
Yu Liu, Jiateng Duan, Dianqiang Xu, Jiawei Chu, Shi Shen, Jiafei Zhao, Lanlan Jiang
Summary: The phase equilibria of different systems were investigated, and it was found that mineral oil and MEG shifted the phase equilibrium to different directions. The hydrate inhibition performance and generation characteristics of the composite formulation of Luvicap 55w and MEG were studied, and it was observed that increasing subcooling decreased the induction time and increased gas consumption. The induction time increased with increasing MEG concentration, confirming the synergistic effect of MEG in the oil-water emulsion for Luvicap 55w.
ENERGY SCIENCE & ENGINEERING
(2023)
Article
Engineering, Chemical
Kunpeng Xue, Yu Liu, Tao Yu, Junchen Lv
Summary: This study aims to assess the effectiveness of the step-wise depressurization method for gas production from natural gas hydrates in the Nankai Trough. The simulation results showed that the step-wise depressurization method significantly increased the cumulative gas production by more than 10% and mitigated the rapid generation of gas and water production during the moment of depressurization. It is suggested that a depressurization gradient of 1 MPa and a maintenance time of 1 day should be employed.
Article
Engineering, Marine
Junrong Liu, Hangyu Li, Jianchun Xu, Shuyang Liu, Rongjiang Liu, Lianjie Hou, Qizhi Tan
Summary: This study used nuclear magnetic resonance (NMR) technology-assisted waterflooding to investigate the characteristics and mechanisms of high-pore-volume (high-PV) waterflooding. The experiment showed that high-PV displacement had a significant effect on enhanced oil recovery (EOR), even in the ultrahigh water cut stage. The study also revealed changes in the rock structure and pore volume during flooding, with a decrease in macropores and an increase in micropores and mesopores. The findings suggested that the pore structure variations observed in the experimental cores were representative of reservoirs, indicating that high-PV waterflooding could increase reservoir permeabilities.
JOURNAL OF MARINE SCIENCE AND ENGINEERING
(2023)
