The wettability of shale is an important factor affecting oil and gas extraction, and conventional experimental methods are difficult to study at the nanoscale. Moreover, most existing studies are qualitatively based on the wettability of rock surfaces with little consideration for their impact on the CO-EOR. This study employs molecular dynamics simulation methods to conduct an in-depth analysis of the role of rock surface wettability in the CO-enhanced oil recovery (EOR) process. The research findings indicate that as the surface hydroxyl content increases, the adsorption affinity for CO is enhanced, with the selectivity increasing exponentially from 0.74 in the strongly oleophilic wetting (SOW) pore to 3.62 in the strong hydrophilic wetting (SHW) pore. Additionally, variations in wettability result in different types of CO displacement. As oil wettability decreases, the contact interface between CO and oil changes from a convex to a concave shape. Moreover, different types of wettability result in different dynamic contact angle changes over time, which significantly impacts various displacement stages. A comprehensive comparison shows that pores exhibiting oil-wet characteristics reduce the efficiency of the CO-EOR. Finally, the investigation explored the influence of pore structure on oil displacement efficiency. In double pores, when the larger pores exhibit hydrophobic characteristics, they further accelerate the displacement speed of the smaller pores. In connected pores, the presence of notch speeds up the displacement effect within the smaller pores, reducing the impact of wettability on displacement efficiency. This study deeply analyzes the role of shale surface wettability in the CO-EOR process, revealing the impact of wettability on the CO adsorption affinity, fluid displacement, oil displacement efficiency, and flow characteristics of shale oil, providing an important theoretical basis for optimizing the CO-EOR process by adjusting wettability.
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http://dx.doi.org/10.1021/acs.langmuir.4c04211 | DOI Listing |
J Colloid Interface Sci
December 2024
Anhui Province Engineering Research Center of Flexible and Intelligent Materials, School of Chemistry and Chemical Engineering, Hefei University of Technology, 230009 Hefei, China. Electronic address:
Lead Sulfide (PbS) has garnered attention as a promising thermoelectric (TE) material due to its natural abundance and cost-effectiveness. However, its practical application is hindered by inherently high lattice thermal conductivity and low electrical conductivity. In this study, we address these challenges by surface functionalization of PbS nanocrystals using CuS molecular complexes-based ligand displacement.
View Article and Find Full Text PDFPhlebology
December 2024
Department of Biomedical and Neuromotor Sciences, Alma Mater Studiorum, University of Bologna, Bologna, Italy.
Objectives: The primary aim of this study was to evaluate the reliability and efficiency of a 3D laser scanner as a tool for volumetric measurement of the upper limbs, comparing it with the gold standard method of non-reflux water displacement. The study sought to determine whether the 3D scanner could serve as a reliable and time-efficient alternative in clinical settings, particularly for managing conditions like lymphedema.
Methods: A total of 30 healthy participants (18 women, 12 men) were recruited, and volumetric measurements were taken using both the 3D scanner and water displacement methods.
J Colloid Interface Sci
December 2024
State Key Laboratory of Photon-Technology in Western China Energy, Institute of Photonics &Photon-Technology, Northwest University, Xi'an 710069, China. Electronic address:
Although self-polarized piezoelectric semiconductor photocatalysts significantly enhance the separation of internally generated photocarriers, their photocatalytic performance is constrained by insufficient internal polarisation and a wide bandgap. Additionally, the low concentration of oxygen in contaminated water limits the effectiveness of such photocatalysts. To the best of our knowledge, this study was the first to determine that the piezoelectric properties of BiMoO (BMO), was due to the polarisation displacement of the MoO octahedron that occurred along the x-axis, as revealed through density functional theory (DFT) calculations.
View Article and Find Full Text PDFJ Migr Health
November 2024
Columbia University Mailman School of Public Health, 722 W 168th St, New York, New York, 10032 USA.
Introduction: The social connections surrounding children and adolescents support them in facing challenges and seeking help, ultimately acting as a protective factor in their mental, physical, and behavioral health outcomes across the life course. In complex contexts of political instability and dislocation, these social resources are often fractured, strained, or altogether unavailable, which restricts access to essential services and affects outcomes for these populations. This study aims to identify, characterize, and visually depict social connections related to the health and well-being needs of children and adolescents affected by displacement in Lebanon, by pilot testing the Participatory Assessment Tool for Mapping Social Connections (PATMSC).
View Article and Find Full Text PDFFront Neurol
December 2024
Department of Neurosurgery, Xinxiang Central Hospital, The Fourth Clinical Hospital of Xinxiang Medical University, Xinxiang, China.
Objective: To construct a nomogram model based on clinical risk factors and CT radiohistological features to predict the prognosis of hypertensive intracerebral hemorrhage (HICH).
Methods: A total of 148 patients with HICH from April 2022 to July 2024 were retrospectively selected as the research subjects. According to the modified Rankin scale at the time of discharge, they were divided into good group (Rankin scale score 0-2) and bad group (Rankin scale score 3-6).
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