Xi'an Shiyou University

Advancements in high-temperature and environmentally friendly water-based drilling fluids for horizontal wells

Abstract Against the backdrop of the global energy transition toward green and low-carbon development, the exploitation of unconventional oil and gas resources has become a strategic priority worldwide. This critical review systematically summarizes the state-of-the-art progress...

Sustainable strategies to improve indoor comfort and reduce energy consumption in winter: Integration of fly ash and rice husk ash in PCM concrete

The thermal performance of a building envelope is closely related to its energy consumption. Merging industrial by-products like fly ash (FA) and rice husk ash (RHA) with phase change material (PCM) concrete unlocks a pathway to significantly enhanced thermal insulation propertie...

Main Controlling Factors of the Chang 9 Oil Reservoirs in the Beiliang Area, Western Ordos Basin

The Chang 9 interval of the lower Yanchang Formation in the Ordos Basin is an important exploration target. Integrating stratigraphic correlation of 163 wells, sedimentary facies analysis of 10 wells, reservoir testing, and fluid pressure–temperature data, this study investigated...

Multiscale Heterogeneity and Pore–Throat Controls on Upper Paleozoic Tight Sandstone Reservoir Quality in the Northern Yanchang Gas Field

Reservoir evaluation in the northern Yanchang Gas Field is complicated by variable permeability within low-porosity Upper Paleozoic sandstones. This study compares the He 8, Shan 1, Shan 2, and Benxi intervals using core petrophysical summaries, formation- and well-level heteroge...

Cross-Layer Propagation Behavior of Multi-Cluster Hydraulic Fractures in Inclined Bedded Reservoirs

Bedding planes widely exist in stratified reservoirs and strongly restrict the vertical cross-layer growth of hydraulic fractures. Traditional displacement discontinuity method (DDM) tends to produce spurious negative apertures for compressed weak bedding interfaces and neglects...

Corrosion Failure Analysis of Tubing Couplings and the Mechanism of Flow-Accelerated Corrosion

Tubing couplings are recognized as a vulnerable link in pipe string integrity, accounting for over 60% of all failure incidents. In this study, a perforation-failed N80 double-male short sub retrieved from a coalbed methane jet pump well was systematically investigated. A multi-f...

Annealing-induced interfacial evolution of β-Ga2O3 (001)/4H-SiC heterostructures fabricated by surface-activated bonding

β-Ga 2 O 3 /4H-SiC heterostructures are promising for the heterogeneous integration of ultrawide-bandgap semiconductors, yet the thermal evolution of their bonded interfaces remains insufficiently understood. In this work, β-Ga 2 O 3 (001) and 4H-SiC wafers were directly bonded b...

Predicting Engineering-Defined Failure Risk Levels of Metal-Loss-Related Pipeline Girth Weld Defects Under Incomplete Engineering Data

Predicting engineering-defined failure risk levels for pipeline girth welds …is challenging because engineering records may be incomplete Conventional models often struggle with incomplete engineering inputs, as standard imputation pipelines tend to treat estimated values as equa...

Surface mechanical attrition-induced hierarchical gradient nanostructuring enables ultrahigh strength and moderate ductility in Mg-Sn-Zn-Zr alloys

The engineering application of lightweight structural magnesium (Mg) alloys is usually impeded by the challenge of achieving high strength together with useful tensile ductility. In this study, rare-earth-free Mg-6Sn-3Zn-0.3Zr alloys with ultimate tensile strengths (UTS) of 385–4...

Study on the Hydraulic Fracture Propagation Mechanism in Deep Coalbed Methane Reservoirs of the Yan’an Gas Field

To address the unclear fracture propagation behavior and the insufficient understanding of the influence mechanisms of fracturing parameters during the hydraulic fracturing of deep coalbed methane reservoirs in the Yan’an Gas Field, Well JY1 in the No. 8 coal seam of the Benxi Fo...

Pressure-Controlled Drainage Strategy for Deep Coalbed Methane Wells Considering Stress Sensitivity

China’s deep coalbed methane (CBM) resources hold significant development potential, yet their commercial exploitation remains hindered by four interrelated reservoir challenges: substantial burial depth, elevated in situ stress, ultra-low matrix permeability, and pronounced stre...

Integrated Dynamic Evaluation and Prospect Screening for Infill-Well Optimization in a Tight Sandstone Gas Reservoir

As a typical tight sandstone gas reservoir, the study area has entered a production-decline stage after years of development, and well pattern infilling has become a key means of improving the recovery factor. A cluster-analysis-based classification divided the reservoir into thr...

Research advances in metal halides for flexible indirect X‐ray imaging

Abstract In recent years, metal halides (MHs) have emerged as ideal materials for indirect X‐ray detection scintillators due to their superior radiation luminescence properties, tunable luminescence, and low‐cost fabrication. However, rigid scintillators often suffer from dark co...

HSSynergy: scale-aware hierarchical attention for interpretable drug synergy prediction

Abstract Combination therapy offers a promising strategy for cancer treatment by reducing toxicity and overcoming drug resistance. However, existing substructure-based prediction methods may struggle to effectively capture the scale-specific features of substructure interactions...

Effect of Polarity on the Electrical Properties and Low-Frequency Noise Characteristics of LEDs Grown on Sapphire Substrates

Abstract In this study, the electrical properties, photoluminescence spectra and the low-frequency noise behaviors of the polar, semipolar, and nonpolar AlGaN-based UV LEDs grown on the sapphire substrate have been measured and investigated at room temperature. The electrical par...

Near‐Infrared Light‐Emitting Diodes With 15.8% External Quantum Efficiency via Electron‐Phonon Coupling Regulation in Eco‐Friendly CuInSSe/ZnS Quantum Dots

ABSTRACT Despite their eco‐friendly profile, the luminescence efficiency of I–III–VI group quantum dots (QDs) for near‐infrared (NIR) applications is fundamentally limited by defects and strong electron‐phonon coupling (EPC). Here, we report a solvent engineering strategy that si...

Analysis of Microscopic Flow Behavior and Main Controlling Factors of Water Huff-n-Puff in Tight Reservoirs Under the Influence of Salinity

Abstract To address the unclear microscopic mechanisms of water huff-n-puff in tight reservoirs under the influence of salinity, a visual physical model for microscopic flow in fracturing fluid displacement was constructed. It was clarified that the fluid displacement mechanism d...

A 200°C‐Tolerant Water‐Based Drilling Fluid for Ultra‐Deep Wells Using an Organic–Inorganic Multi‐Metal Hydroxide Modifier

ABSTRACT A water‐based drilling‐fluid (WBDF) formulation was developed for moderate‐density ultra‐deep intervals requiring thermal stability at 200°C. The optimized formulation contained 5 wt% APEG/sodium‐citrate‐modified quaternary Mg‐Al‐Fe‐Zn multi‐metal hydroxide (ASMH), 0.3 w...

Bioinspired Large-AreaPolymeric Cucurbituril Monolayerswith Ultrahigh-Density Nanopores Enabling Reversible Charge-Gatingof Ion Transport via Host–Guest Recognition

Abstract Achieving precise control over ion and molecular transport under subnanometer confinement, especially beyond passive sieving, remains challenging in nanofluidics and membrane science. Here, we present a bioinspired strategy that enables the formation of subnanometer chan...

Current-Division-Aware Modeling and Detuning Design of a Receiver-Side LCC-Type Three-Coil Wireless Power Transfer System for Fixed-Frequency CC/CV Charging

To satisfy the constant-current/constant-voltage (CC/CV) charging requirements of electric-vehicle batteries, this paper investigates the extension of an established fixed-frequency reconfigurable three-coil wireless power transfer system using a modified receiver-side LCC-type n...