Article
Engineering, Petroleum
Pal Ostebo Andersen
Summary: The study presents an explicit analytical solution for 1D cocurrent spontaneous imbibition, analyzing the dynamics of the system to explain the movement of oil and water at different stages and the corresponding effects.
Article
Energy & Fuels
Ke Wang, Beibei Jiang, Kairui Ye, Haitao Li, Yongsheng Tan
Summary: This study comprehensively analyzes the imbibition pressures of the gas-water phase and introduces a new imbibition model that performs better in predicting fluid loss during the hydraulic fracturing process for shale gas wells.
JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING
(2022)
Article
Chemistry, Multidisciplinary
Bowen Shen, Chunyu Pan, Xiaopeng Feng, Jehan Kim, Mo Sun, Myongsoo Lee
Summary: Researchers report spontaneous chirality induction in a single layer 2D network structure formed from the self-assembly of tetrapod azobenzene molecules. The chirality induction occurs due to the slipping of multiple sublayers in a preferred direction, where the sublayer consists of different molecular arrangements in the in-plane a and b directions, breaking both the plane of symmetry and inversion symmetry. The protruded azobenzene units in the pore interior can be selectively isomerized upon UV irradiation, resulting in a reversible deformation of the chiral pores while maintaining the 2D frameworks. The chiral network can selectively trap one enantiomer from a racemic solution and release it upon UV irradiation.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Energy & Fuels
Zhonghua Liu, Baojun Bai, Yanling Wang, Hai Qu, Qianhua Xiao, Shunpeng Zeng
Summary: The study found that during the spontaneous imbibition process of slickwater in shale gas fields, the imbibition capacities of its components differ, and the imbibition mainly occurs through secondary microfractures.
JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING
(2021)
Article
Energy & Fuels
Seyed Mojtaba Bassir, Hassan Shokrollahzadeh Behbahani, Khalil Shahbazi, Shahin Kord, Abouzar Mirzaei-Paiaman
Summary: This research proposes a new empirical scaling equation to predict oil recovery by modified salinity imbibing brines in limestone rocks. By considering two critical aspects and analyzing test data from various limestone samples, the equation is more realistic and applicable to reservoir conditions.
JOURNAL OF PETROLEUM EXPLORATION AND PRODUCTION TECHNOLOGY
(2023)
Article
Engineering, Civil
Sepide Zakeri, Randy Hazlett, Krishna Babu
Summary: Spontaneous imbibition is the primary mechanism for oil expulsion to the fracture network during waterflooding, and a thorough understanding of this phenomenon is crucial for process improvement.
JOURNAL OF HYDROLOGY
(2023)
Article
Energy & Fuels
Lanlan Yao, Zhengming Yang, Haibo Li, Bo Cai, Chunming He, Debin Xia
Summary: Imbibition is an important method of oil recovery in shale oil reservoirs, and the impact of energy enhancement on imbibition is not extensively studied. Pressurized imbibition can increase the recovery ratio of fractured shale, while spontaneous imbibition can improve the ultimate recovery ratio of matrix shale.
JOURNAL OF PETROLEUM EXPLORATION AND PRODUCTION TECHNOLOGY
(2021)
Article
Mechanics
Hanshuang Chen, Feng Huang, Chuansheng Shen, Guofeng Li, Haifeng Zhang
Summary: In this study, we obtained the probability distribution of the degree assortativity coefficient on configuration networks through simulations, revealing anomalous scaling of the fluctuations in highly heterogeneous networks.
JOURNAL OF STATISTICAL MECHANICS-THEORY AND EXPERIMENT
(2021)
Article
Engineering, Electrical & Electronic
Baturalp Buyukates, Alkan Soysal, Sennur Ulukus
Summary: The study focuses on the age of information scaling in large wireless networks with multiple source-destination pairs. They proposed a three-phase transmission scheme and hierarchical cooperation to achieve better age scaling results in a status update system.
IEEE TRANSACTIONS ON WIRELESS COMMUNICATIONS
(2021)
Article
Mathematics, Interdisciplinary Applications
Guanqun LI, Yuliang Su, Wendong Wang
Summary: Large-scale hydraulic fracturing is crucial for efficient shale oil production, but the mechanisms of fracturing fluid flow in shale micropores and the impact of shale microstructure and physical properties are not well understood. This lack of understanding hinders the optimization of fracturing flowback and limits shale oil recovery enhancement. This study analyzes the characteristics of shale pores using SEM and XRD experiments, finding multiple pore types including organic pores, brittle mineral pores, and clay pores. The study investigates the influence of cross-section shapes on capillary force and analyzes the dynamics of imbibition in different pore types. A shale semi-analytical solution that considers imbibition time, fluid properties, pore cross-section shapes, tortuosity, and forced pressure is established using a shale multi-pores physical model and fractal theory.
FRACTALS-COMPLEX GEOMETRY PATTERNS AND SCALING IN NATURE AND SOCIETY
(2023)
Article
Energy & Fuels
Muhammad Saafan, Tarek Ganat, Mysara Mohyaldinn, Xiaojun Chen
Summary: This paper presents a unique approach to infer spontaneous imbibition capillary pressure curves from 2D images through integration of image analysis and fractal theory. By simulating different displacement mechanisms, an innovative fractal capillary pressure model is developed and validated experimentally for accuracy.
JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING
(2022)
Article
Energy & Fuels
Zhongwei Wu, Chuanzhi Cui, Yinzhu Ye, Xiangzhi Cheng, Japan Trivedi
Summary: This paper establishes a model based on fractal theory to quantitatively evaluate the effects of spontaneous imbibition (SI) and displacement on the development of tight reservoirs. It reveals that reservoir properties have a significant impact on the imbibition time, and the effect of SI becomes more substantial when water viscosity decreases. Moreover, the contact angle, interfacial tension force, and displacement pressure difference also play a crucial role in influencing the effect of SI on the recovery of tight reservoirs.
JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING
(2021)
Article
Environmental Sciences
V. E. Spooner, S. Geiger, D. Arnold
Summary: By introducing the retardation factor R and new metrics, single-porosity flow diagnostics have been extended to dual-porosity systems for more accurate assessment of displacement efficiency and dynamic heterogeneity in fractured reservoirs. Combining L-c*(star) and E-v*(star) with stochastic optimization algorithms can improve the displacement efficiency of injected fluid. Dual-porosity flow diagnostics have advantages in screening parameter space and quickly identifying scenarios that need further study.
WATER RESOURCES RESEARCH
(2021)
Article
Mathematics, Interdisciplinary Applications
Peilong Wang, Boqi Xiao, Jun Gao, Huaizhi Zhu, Mingxing Liu, Gongbo Long, Peichao Li
Summary: In this study, the spontaneous imbibition dynamics in a damaged V-shaped tree-like branching network were theoretically explored and compared with a parallel net with fixed constraints. The imbibition capacity was characterized by two dimensionless quantities: imbibition potential and dimensionless imbibition time. The analytical expressions of these two dimensionless quantities were generated using fractal theory. The influence of structural parameters on the imbibition process was systematically investigated. The proposed model provides effective guidance for imbibition process analysis in damaged tree-like networks.
FRACTALS-COMPLEX GEOMETRY PATTERNS AND SCALING IN NATURE AND SOCIETY
(2023)
Article
Chemistry, Multidisciplinary
Yuejie Wang, Huiqing Liu, Yu Li, Qing Wang
Summary: The research established a spontaneous imbibition model for tight reservoirs, verified its reliability through experiments, and found variations in imbibition area and recovery under different boundary conditions. The superimposed effect can not only enhance oil washing efficiency but also inhibit the spread of the imbibition area.
Article
Biophysics
Ivan Hornak, Heiko Rieger
BIOPHYSICAL JOURNAL
(2020)
Article
Physics, Condensed Matter
Chao Zhang, Heiko Rieger
EUROPEAN PHYSICAL JOURNAL B
(2020)
Article
Physics, Multidisciplinary
Adam Wysocki, Heiko Rieger
PHYSICAL REVIEW LETTERS
(2020)
Article
Physics, Multidisciplinary
Chao Zhang, Heiko Rieger
FRONTIERS IN PHYSICS
(2020)
Editorial Material
Physics, Condensed Matter
Ferenc Igloi, Heiko Rieger
EUROPEAN PHYSICAL JOURNAL B
(2020)
Article
Physics, Condensed Matter
Johannes Sicks, Heiko Rieger
EUROPEAN PHYSICAL JOURNAL B
(2020)
Article
Biophysics
Zeinab Sadjadi, Renping Zhao, Markus Hoth, Bin Qu, Heiko Rieger
BIOPHYSICAL JOURNAL
(2020)
Article
Physics, Multidisciplinary
Hugues Meyer, Heiko Rieger
Summary: This study investigates the efficiency of non-Markovian search processes with long-lasting memory, showing that the optimal search strategies can be simplified to simple cycles defined by a small parameter set and that mirror-asymmetric walks are more efficient.
PHYSICAL REVIEW LETTERS
(2021)
Article
Biophysics
Ivan Hornak, Heiko Rieger
Summary: This study analyzes the dynamics of the repositioning of microtubule organizing center (MTOC) during the formation of the immunological synapse (IS) between cytotoxic T lymphocytes and target cells. The study finds that the initial position of the MTOC determines the dominant mechanism and the time of repositioning does not increase linearly with the distance between MTOC and IS. In the case of two IS, different scenarios are observed, including alternating, wiggling, and being pulled to one of the IS. The presence of capture-shrinkage mechanism in at least one IS is necessary for the transitions in every cell configuration.
BIOPHYSICAL JOURNAL
(2022)
Article
Physics, Fluids & Plasmas
Mintu Karmakar, Swarnajit Chatterjee, Matthieu Mangeat, Heiko Rieger, Raja Paul
Summary: We studied the active Potts model with site occupancy restriction or on-site repulsion and found that it exhibits a surprisingly rich variety of self-organized spatial patterns. The introduction of volume exclusion features leads to the occurrence of bands and lanes of moving particles, and with strong volume exclusion, low temperature, high activity, and large particle density, jams due to motility-induced phase separation can be facilitated. Through phase diagrams, we identified phase boundaries and studied the transition between jammed and free-flowing phases, providing qualitative and quantitative predictions on how jamming might be delayed or dissolved. We also formulated and analyzed a hydrodynamic theory for the restricted APM, which predicts various features of the microscopic model.
Article
Physics, Fluids & Plasmas
Chul-Ung Woo, Heiko Rieger, Jae Dong Noh
Summary: We investigate the phase transitions of the q-state Brownian Potts model in 2D. Through Monte Carlo simulations, we find a continuous phase transition from a paramagnetic to a ferromagnetic phase even for q > 4. In contrast to the equilibrium model, diffusion-induced dynamical positional disorder suppresses phase coexistence, leading to a continuous transition.
Article
Physics, Fluids & Plasmas
Matthieu Mangeat, Heiko Rieger
Summary: This paper investigates the impact of spatial heterogeneity in intracellular transport in living cells on the mean first passage time (MFPT) for Brownian particles, comparing active transport and passive Brownian motion to determine if optimization can be achieved in a two-compartment domain. The study derives asymptotic expressions for MFPT in thin cortex and small escape region limits in two and three dimensions, confirmed by numerical calculations using the finite-element method and stochastic simulations. The analysis reveals the dependence of MFPT on diffusion constants ratio, potential barrier height, and outer shell width, with potential for a minimum value in the latter under specific conditions.
Article
Physics, Multidisciplinary
Swarnajit Chatterjee, Matthieu Mangeat, Raja Paul, Heiko Rieger
Article
Materials Science, Multidisciplinary
Peter Lajko, Jean-Christian Angles d'Auriac, Heiko Rieger, Ferenc Igloi
Review
Physics, Applied
M. Reza Shaebani, Adam Wysocki, Roland G. Winkler, Gerhard Gompper, Heiko Rieger
NATURE REVIEWS PHYSICS
(2020)
