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  • Open Access

    ARTICLE

    Gas Production and Reservoir Settlement in NGH Deposits under Horizontal-Well Depressurization

    Lijia Li, Shu Liu, Xiaoliang Huang*, Zhilin Qi

    FDMP-Fluid Dynamics & Materials Processing, Vol.22, No.1, 2026, DOI:10.32604/fdmp.2026.073294 - 06 February 2026

    Abstract Identifying geohazards such as landslides and methane leakage is crucial during gas extraction from natural gas hydrate (NGH) reservoirs, and understanding reservoir settlement behavior is central to this assessment. Horizontal wells can enlarge the pressure relief zone within the formation, improving single-well productivity, and are therefore considered a promising approach for NGH development. This study examines the settlement response of hydrate-bearing sediments during depressurization using horizontal wells. A fully coupled thermal, hydraulic, mechanical, and chemical (THMC) model with representative reservoir properties (Shenhu region in the South China Sea) is presented accordingly. The simulations show that More >

  • Open Access

    ARTICLE

    Geometrically Nonlinear Analyses of Isotropic and Laminated Shells by a Hierarchical Quadrature Element Method

    Yingying Lan, Bo Liu*

    CMES-Computer Modeling in Engineering & Sciences, Vol.146, No.1, 2026, DOI:10.32604/cmes.2026.075706 - 29 January 2026

    Abstract In this work, the Hierarchical Quadrature Element Method (HQEM) formulation of geometrically exact shells is proposed and applied for geometrically nonlinear analyses of both isotropic and laminated shells. The stress resultant formulation is developed within the HQEM framework, consequently significantly simplifying the computations of residual force and stiffness matrix. The present formulation inherently avoids shear and membrane locking, benefiting from its high-order approximation property. Furthermore, HQEM’s independent nodal distribution capability conveniently supports local p-refinement and flexibly facilitates mesh generation in various structural configurations through the combination of quadrilateral and triangular elements. Remarkably, in lateral buckling… More >

  • Open Access

    ARTICLE

    Numerical Simulation of Cross-Layer Propagation Mechanisms for Hydraulic Fractures in Deep Coal-Rock Formations

    Zhirong Jin1,*, Xiaorui Hou1, Yanrong Ge1, Tiankui Guo2, Ming Chen2, Shuyi Li2, Tianyu Niu2

    Energy Engineering, Vol.123, No.2, 2026, DOI:10.32604/ee.2025.070750 - 27 January 2026

    Abstract Hydraulic fracturing serves as a critical technology for reservoir stimulation in deep coalbed methane (CBM) development, where the mechanical properties of gangue layers exert a significant control on fracture propagation behavior. To address the unclear mechanisms governing fracture penetration across coal-gangue interfaces, this study employs the Continuum-Discontinuum Element Method (CDEM) to simulate and analyze the vertical propagation of hydraulic fractures initiating within coal seams, based on geomechanical parameters derived from the deep Benxi Formation coal seams in the southeastern Ordos Basin. The investigation systematically examines the influence of geological and operational parameters on cross-interfacial fracture… More >

  • Open Access

    ARTICLE

    Linxing-Shenfu Gangue Interaction Coal Seam Hydraulic Fracture Cross-Layer Expansion Mechanism

    Li Wang1, Xuesong Xing1, Yanan Hou1, Heng Wen1, Ying Zhu1, Jingyu Zi1, Qingwei Zeng2,3,*

    Energy Engineering, Vol.123, No.2, 2026, DOI:10.32604/ee.2025.068653 - 27 January 2026

    Abstract The deep coal reservoir in Linxing-Shenfu block of Ordos Basin is an important part of China’s coalbed methane resources. In the process of reservoir reconstruction, the artificial fracture morphology of coal seam with gangue interaction is significantly different, which affects the efficient development of coalbed methane resources in this area. In this paper, the surface outcrop of Linxing-Shenfu block is selected, and three kinds of interaction modes between gangue and coal seam are set up, including single-component coal rock sample, coal rock sample with different thicknesses of gangue layer and coal rock sample with different… More >

  • Open Access

    ARTICLE

    A New Approach for Evaluating and Optimizing Hydraulic Fracturing in Coalbed Methane Reservoirs

    Xia Yan1, Wei Wang1, Kai Shen2,*, Yanqing Feng1, Junyi Sun1, Xiaogang Li1, Wentao Zhu1, Binbin Shi1, Guanglong Sheng2,3

    Energy Engineering, Vol.123, No.1, 2026, DOI:10.32604/ee.2025.070360 - 27 December 2025

    Abstract In the development of coalbed methane (CBM) reservoirs using multistage fractured horizontal wells, there often exist areas that are either repeatedly stimulated or completely unstimulated between fracturing stages, leading to suboptimal reservoir performance. Currently, there is no well-established method for accurately evaluating the effectiveness of such stimulation. This study introduces, for the first time, the concept of the Fracture Network Bridging Coefficient (FNBC) as a novel metric to assess stimulation performance. By quantitatively coupling the proportions of unstimulated and overstimulated volumes, the FNBC effectively characterizes the connectivity and efficiency of the fracture network. A background… More >

  • Open Access

    ARTICLE

    FeatherGuard: A Data-Driven Lightweight Error Protection Scheme for DNN Inference on Edge Devices

    Dong Hyun Lee1, Na Kyung Lee2, Young Seo Lee1,2,*

    CMC-Computers, Materials & Continua, Vol.86, No.2, pp. 1-17, 2026, DOI:10.32604/cmc.2025.069976 - 09 December 2025

    Abstract There has been an increasing emphasis on performing deep neural network (DNN) inference locally on edge devices due to challenges such as network congestion and security concerns. However, as DRAM process technology continues to scale down, the bit-flip errors in the memory of edge devices become more frequent, thereby leading to substantial DNN inference accuracy loss. Though several techniques have been proposed to alleviate the accuracy loss in edge environments, they require complex computations and additional parity bits for error correction, thus resulting in significant performance and storage overheads. In this paper, we propose FeatherGuard,… More >

  • Open Access

    ARTICLE

    Effect of Supplementation Time and Selenium Chemical Form on the Efficiency of Dandelion Biofortification

    Nadezhda Golubkina1,*, Pavel Poluboyarinov2, Lyubov Skrypnik3, Agnieszka Sękara4, Otilia Cristina Murariu5, Gianluca Caruso6

    Phyton-International Journal of Experimental Botany, Vol.94, No.12, pp. 3861-3877, 2025, DOI:10.32604/phyton.2025.070988 - 29 December 2025

    Abstract Circadian biorhythms are fundamental in plant adaptability and development. To reveal the effect of organic and inorganic forms of Se, foliar treatments of dandelion with 0.26 mM Se solutions were practiced in two contrasting day times: in the morning with the highest levels of leaf Se and polyphenol (TP) and the lowest dry matter, and in the evening with the opposite characteristics. Compared to the control, the morning Se supply demonstrated a higher increase of root biomass (1.27–1.37 times), Se (1.82–2.85 times), TP content (1.42–1.44 times), and antioxidant activity (AOA) (1.47–1.48 times) than the evening… More > Graphic Abstract

    Effect of Supplementation Time and Selenium Chemical Form on the Efficiency of Dandelion Biofortification

  • Open Access

    ARTICLE

    Adsorption behavior and mechanism of heavy metal ions from acid mine drainage using two-dimensional MoS2 nanosheets

    K. Wanga,b,*, G. L. Lianc, Y. F. Qiaod

    Chalcogenide Letters, Vol.22, No.10, pp. 889-904, 2025, DOI:10.15251/CL.2025.2210.889

    Abstract The remediation of acid mine drainage (AMD), characterized by its high concentrations of toxic metal ions and low pH, presents a significant environmental challenge. In this study, exfoliated two-dimensional MoS nanosheets were prepared using a liquid-phase ultrasonication method and evaluated for their efficiency in removing Cd²⁺, Cu²⁺, and Pb²⁺ from aqueous solutions. Detailed structural and morphological analyses confirmed that the exfoliation process significantly enhanced surface area, pore volume, and exposure of reactive sulfur sites. Through isotherm and kinetic modeling analyses, the adsorption behavior was found to align with the Langmuir model and pseudo-second-order kinetic equation, which implies More >

  • Open Access

    ARTICLE

    Genome-Wide Scanning Analysis for MYB and MADS in Hydrangea macrophylla and the Inflorescence Type Related Candidate Genes Expression Analysis

    Qunlu Liu1,#, Fiza Liaquat1,2,#, Qiqi Tang1, Jun Yang3,4, Shuai Qiu5, Amber Malik2, Kang Ye3,4, Kai Gao5, Jun Qin3,4,*

    Phyton-International Journal of Experimental Botany, Vol.94, No.11, pp. 3539-3562, 2025, DOI:10.32604/phyton.2025.071989 - 01 December 2025

    Abstract Hydrangea macrophylla is a popular ornamental shrub with a lot of economic and aesthetic value. It is known for its different flower shapes (lacecap and mophead) and the way its flowers change color depending on the pH of the soil. Even though it is important for gardening, we still don’t know much about the molecular processes that lead to flower growth. The purpose of this study was to find and study SNP-related genes and transcription factors that are connected to the growth of H. macrophylla flowers. Genome-wide SNP analysis identified 11 SNPs associated with MYB transcription factors… More >

  • Open Access

    ARTICLE

    Large-Volume Hydraulic Fracturing in Tight Gas Reservoirs: High-Efficiency Stimulation and Geological Adaptability Assessment

    Bo Wang1, Fuyang Wu2, Zifeng Chen2, Libin Dai1, Yifan Dong1, Xiaotao Gao3, Zongfa Li2,*

    FDMP-Fluid Dynamics & Materials Processing, Vol.21, No.11, pp. 2701-2719, 2025, DOI:10.32604/fdmp.2025.067298 - 01 December 2025

    Abstract Tight gas reservoirs are often characterized by pronounced heterogeneity and poor continuity, resulting in wide variability in production enhancement and net present value (NPV) for different geological parameter combinations (see e.g., the Ordos Basin). The conditions governing geological adaptability remain insufficiently defined. To address these challenges, this study integrates large-volume hydraulic fracturing, numerical production simulation, and economic evaluation to elucidate the mechanisms by which large-scale fracturing enhances fracture parameters in tight gas formations. The analysis reveals that, for identical proppant and fluid volumes, increasing the fracturing injection rate leads to longer and taller fractures. Over… More >

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