Bohao Wu^*, Xiuqi Zhang, Haoheng Liu, Yulong Ji

FDMP-Fluid Dynamics & Materials Processing, Vol.21, No.10, pp. 2359-2387, 2025, DOI:10.32604/fdmp.2025.067651 - 30 October 2025

Abstract Geological sequestration of carbon dioxide (CO₂) entails the long-term storage of captured emissions from CCUS (Carbon Capture, Utilization, and Storage) facilities in deep saline aquifers to mitigate greenhouse gas accumulation. Among various trapping mechanisms, dissolution trapping is particularly effective in enhancing storage security. However, the stratified structure of saline aquifers plays a crucial role in controlling the efficiency of CO₂ dissolution into the resident brine. In this study, a two-dimensional numerical model of a stratified saline aquifer is developed, integrating both two-phase flow and mass transfer dynamics. The model captures the temporal evolution of gas saturation,… More >

Surajudeen Sikiru^1,2,*, Jemilat Yetunde Yusuf ³, Hassan Soleimani⁴, Niraj Kumar⁵, Zia ur Rehman⁶, Bonnia N N^1,*

Energy Engineering, Vol.122, No.10, pp. 3917-3960, 2025, DOI:10.32604/ee.2025.067815 - 30 September 2025

Abstract Enhanced oil recovery (EOR) refers to the many methodologies used to augment the volume of crude oil extracted from an oil reservoir. These approaches are used subsequent to the exhaustion of basic and secondary recovery methods. There are three primary categories of Enhanced Oil Recovery (EOR): thermal, gas injection, and chemical. Enhanced oil recovery methods may be costly and intricate; yet, they facilitate the extraction of supplementary oil that would otherwise remain in the reservoir. Enhanced Oil Recovery (EOR) may prolong the lifespan of an oil field and augment the total output from a specific… More >

Mao Jiang¹, Jianshu Wu¹, Chengyong Peng¹, Xuesong Xing¹, Yishan Lou^2,3, Yi Liu^2,3,*, Shanyong Liu^2,3

Energy Engineering, Vol.122, No.10, pp. 4019-4034, 2025, DOI:10.32604/ee.2025.067236 - 30 September 2025

Abstract Fracture conductivity is a key factor to determine the fracturing effect. Optimizing proppant particle size distribution is critical for ensuring efficient proppant placement within fractures. To address challenges associated with the low-permeability reservoirs in the Lufeng Oilfield of the South China Sea—including high heterogeneity, complex lithology, and suboptimal fracturing outcomes—JRC (Joint Roughness Coefficient) was employed to quantitatively characterize the lithological properties of the target formation. A CFD-DEM (Computational Fluid Dynamics-Discrete Element Method) two-way coupling approach was then utilized to construct a fracture channel model that simulates proppant transport dynamics. The proppant particle size under different… More >

Junyu Deng^1,2, Rui Zhang^1,*, Xudong Zhao³, Hongzhi Xu^1,2, Peng Ji¹, Zizhen Zhang¹, Yifan Yang¹

Energy Engineering, Vol.122, No.10, pp. 4153-4168, 2025, DOI:10.32604/ee.2025.065906 - 30 September 2025

Abstract Field tests have demonstrated that depressurization with controlled sand production is an effective technique for natural gas hydrate extraction. Variations in depositional environments and processes result in significant heterogeneity within subsea natural gas hydrate-bearing sediments. However, the influence of permeability heterogeneity on production performance during depressurization with controlled sand production remains inadequately understood. In this study, a multiphase, multi-component mathematical model is developed to simulate depressurization with controlled sand production in methane hydrate-bearing sediments, incorporating geological conditions representative of unconsolidated argillaceous siltstone hydrate deposits in the Shenhu area of the South China Sea. The effects… More >

Seo Yeon Shin¹, Nu Ri Song¹, Sa Rang Choi¹, Ki Min Kim¹, Jae Hee Byun¹, Su Jung Kim², Dai Hyun Jung², Seong Sim Kim², Seong Ju Park², So Jeong Chu², Kyung Mok Park^1,*

BIOCELL, Vol.49, No.8, pp. 1435-1448, 2025, DOI:10.32604/biocell.2025.065199 - 29 August 2025

Abstract Background: The efficient transdermal delivery of biologically active molecules remains a major challenge because of the structural barrier of the stratum corneum, which limits the penetration of large or hydrophilic molecules. Low-molecular-weight protamine (LMWP) has a structure similar to that of the HIV TAT protein-derived peptide and is a representative cell-penetrating peptide (CPP) used to increase cell permeability. However, protamine has been reported to have many toxicities and side effects. Objectives: We developed human-derived low-molecular-weight protamine (hLMWP), which is based on fish-derived LMWP but designed using human protein sequences to improve safety and functionality. As… More > Graphic Abstract

Baoyu Chen^1,2, Meina Li³, Jicheng Zhang¹, Wenguo Ma^1,*, Yueqi Wang¹, Tianchen Pan¹, Xuan Liu¹

FDMP-Fluid Dynamics & Materials Processing, Vol.21, No.6, pp. 1459-1471, 2025, DOI:10.32604/fdmp.2025.060255 - 30 June 2025

Abstract The relative permeability of oil and water is a key factor in assessing the production performance of a reservoir. This study analyzed the impact of injecting a viscosity reducer solution into low-viscosity crude oil to enhance fluid flow within a low-permeability reservoir. At 72°C, the oil-water dispersion solution achieved a viscosity reduction rate (f) of 92.42%, formulated with a viscosity reducer agent concentration (C_VR) of 0.1% and an oil-water ratio of 5:5. The interfacial tension between the viscosity reducer solution and the crude oil remained stable at approximately 1.0 mN/m across different concentrations, with the minimum More >

Tao Wang^1,2, Haiyang Yu^1,*, Jie Gao², Fei Wang², Xinlong Zhang^3,*, Hao Yang², Guirong Di², Pengrun Wang²

FDMP-Fluid Dynamics & Materials Processing, Vol.21, No.5, pp. 1191-1200, 2025, DOI:10.32604/fdmp.2025.058865 - 30 May 2025

Abstract Oilfields worldwide are increasingly grappling with challenges such as early water breakthrough and high water production, yet direct, targeted solutions remain elusive. In recent years, chemical flooding techniques designed for tertiary oil recovery have garnered significant attention, with microgel flooding emerging as a particularly prominent area of research. Despite its promise, the complex mechanisms underlying microgel flooding have been rarely investigated numerically. This study aims to address these gaps by characterizing the distribution of microgel concentration and viscosity within different pore structures. To enhance the accuracy of these characterizations, the viscosity of microgels is adjusted More >

Shenghua Li¹, Kehan Liu², Bangxing Qian², Ziwei Wen², Bo Shi^2,*

Frontiers in Heat and Mass Transfer, Vol.23, No.1, pp. 231-248, 2025, DOI:10.32604/fhmt.2025.059963 - 26 February 2025

Abstract Phase change heat transfer devices like heat pipes are widely utilized in temperature control and heat transfer. However, the traditional single uniform wick makes it hard to meet the requirements of capillary pressure and permeability for high-performance heat pipes, thus limiting the improvement of heat transfer performance. In this paper, a gradient structure wick sintered by 316 L stainless steel powder is designed. The capillary performance is tested and characterized through permeability test experiments and capillary rise infrared test experiments. Moreover, the influence of different particle sizes of sintered powder on the capillary performance of More >

Mudasar Zafar^1,2,3,*, Hamzah Sakidin¹, Abida Hussain¹, Loshini Thiruchelvam⁴, Mikhail Sheremet⁵, Iskandar Dzulkarnain³, Roslinda Nazar⁶, Abdullah Al-Yaari¹, Rizwan Safdar^7,8

CMES-Computer Modeling in Engineering & Sciences, Vol.141, No.2, pp. 1193-1211, 2024, DOI:10.32604/cmes.2024.049259 - 27 September 2024

Abstract This study aims to formulate a steady-state mathematical model for a three-dimensional permeable enclosure (cavity) to determine the oil extraction rate using three distinct nanoparticles, SiO₂, Al₂O₃, and Fe₂O₃, in unconventional oil reservoirs. The simulation is conducted for different parameters of volume fractions, porosities, and mass flow rates to determine the optimal oil recovery. The impact of nanoparticles on relative permeability ( and water is also investigated. The simulation process utilizes the finite volume ANSYS Fluent. The study results showed that when the mass flow rate at the inlet is low, oil recovery goes up. In addition, More >

Xianghua Liu¹, Hai Song¹, Lu Zhao¹, Yan Zheng¹, Neng Yang², Dongling Qiu^2,*

FDMP-Fluid Dynamics & Materials Processing, Vol.20, No.10, pp. 2377-2392, 2024, DOI:10.32604/fdmp.2024.051418 - 23 September 2024

Abstract The segmented water control technology for bottom water reservoirs can effectively delay the entry of bottom water and adjust the production profile. To clarify the impact of different methods on horizontal well production with different reservoir conditions and to provide theoretical support for the scientific selection of methods for bottom water reservoirs, a numerical simulation method is presented in this study, which is able to deal with wellbore reservoir coupling under screen tube, perforation, and ICD (Inflow Control Device) completion. Assuming the geological characteristics of the bottom-water conglomerate reservoir in the Triassic Formation of the… More >