Sinopec (China)

Au-Nanostructure Decorated MoS2 Field-Effect Transistors for Enhanced Sensing and Discrimination of Volatile Organic Compounds

Abstract The development of portable, low-power electronic noses for volatile organic compound (VOC) identification is crucial for applications ranging from environmental monitoring to medical diagnostics. Although two-dimensional materials such as molybdenum disulfide (MoS2) are...

Formation and preservation of high-quality reservoirs in the Sha 4 lower submember (Es4x), lacustrine rift bonan depression, Bohai Bay Basin, China

Abstract The formation of high-quality reservoirs remains a critical challenge in the exploration and development of deeply buried clastic systems, particularly in lacustrine rift basins where reservoir quality evolution is governed by complex depositional, diagenetic, and struct...

A High-Voltage Short-Burst Electroacoustic Measurement Method for Piezoelectric Acoustic Logging Transmitters

Piezoelectric acoustic logging transmitters are commonly evaluated using low-voltage small-signal impedance measurements, whereas their practical operation involves high-voltage, high-current, finite-cycle short-burst excitation. This difference makes it difficult to predict the...

High-sensitivity deep shortwave infrared organic photodetectors enabled by selenium-integrated quinoidal molecular semiconductor

Developing organic photodetectors (OPDs) that can detect in deep shortwave infrared (deep-SWIR) region (1.2–1.6 μm) is technologically important. Yet, the performance of the state-of-the-art deep-SWIR OPDs remains substantially limited. Herein, we report a selenium-integrated qui...

Discussion on Decompression Path and Wave Speed of Supercritical and Dense CO2 with Impurities

Decompression of dense and supercritical CO2 containing impurities was investigated using an equilibrium isentropic model coupled with NIST REFPROP 10 and GERG-2008. The pressure plateau was determined from the intersection of the isentropic path and the bubble line. The adopted...

Study on the Influence of Furfural on the Analysis of SARA Fractions

Elution chromatography was used to analyze the content of SARA (saturate, aromatic, resin, and asphaltene) fractions in simulated raffinate and extract phases containing furfural (FUL), and the influence mechanism of furfural on the content analysis of SARA in the two phases was...

Ultra-Short-Term Distributed PV Power Forecasting Based on Correlation Sparse Modeling and Uncertainty Pattern Forecasting

Accurate ultra-short-term power interval forecasting for distributed photovoltaic (DPV) systems is crucial for the intra-day operation of distribution networks. However, existing studies still face two major limitations. First, most spatiotemporal forecasting methods are develope...

Mitigating proppant flowback: multi-factor mechanisms and optimization Strategies from laboratory studies

Proppant flowback after hydraulic fracturing significantly impairs fracture conductivity, yet the quantitative effects of multiple factors remain poorly understood. In this study, based on similarity criteria, an improved API conductivity cell was used to systematically evaluate...

Asymmetric deflagration characteristics of hydrogen-blended natural gas under multiscale conditions: The influence of ignition location

Hydrogen-blended natural gas (HBNG) is receiving increasing attention as a practical low-carbon gaseous fuel for the transition of natural-gas-based energy systems, but its vented deflagration behavior in partially confined spaces remains insufficiently understood, especially whe...

Calcium-leaching-resistant shotcrete for subsea tunnels: Effects of alkali-free accelerator, early-strength material and leaching inhibitor

Calcium leaching can reduce the long-term mechanical capacity of shotcrete used as primary support in subsea tunnels. This study investigated the effects of an alkali-free accelerator, an early-strength material (ESM), and a leaching inhibitor on the strength development, pore st...

Universal synthesis of high-entropy alloy nanostructures with femtosecond lasers

High-entropy alloy nanostructures (HEA-NSs) hold promise in advanced catalysis and materials science, but lack a robust and universal synthetic strategy designed at an atomic level. Here, femtosecond lasers are used to prepare HEA-NSs, from single atoms to 100 nm nanoparticles, e...

CO2 Gas Channel Identification in the CCUS-EOR Process Based on the Fuzzy Comprehensive Evaluation Method

In CO2 flooding, variations in mobility and formation heterogeneity may cause gas to traverse high-permeability or interconnected channels, leading to ineffective gas circulation. This limits recovery rates, ultimately leading to reduced financial benefits. Consequently, the iden...

Geochemical Evidence for the Evolution of the Deyang–Anyue Rift in the Ediacaran–Cambrian Period on the Northwestern Margin of the Yangtze Block

Abstract The evolution of a large intracratonic rift trough in the northern Sichuan Basin, China, along the northwestern margin of the Yangtze Block, is documented during the significant Ediacaran–Cambrian Transition (ECT). Three prevailing perspectives exist regarding the specif...

A self-supervised multi-task framework for downhole fault diagnosis in oil fields: Enhancing temporal feature learning under limited labels

In newly developed oil fields, the accumulation of historical labeled data is relatively scarce, making it challenging to obtain large volumes of annotated data. To address this challenge, this paper proposes a downhole fault diagnosis framework based on a complex self-supervised...

Centroid-Frequency-Guided Nonstationary Reflectivity Inversion and Its Application for Top and Bottom Interface Identification of Coalbed Methane Reservoirs

Nonstationary convolution models are widely used as the forward formula of nonstationary seismic reflectivity inversion (NSRI). This forward formula is determined by the convolution of a time-varying wavelet and reflectivity. Previous NSRI algorithms just focus on the estimation...

Characteristics and Genetic Types of Authigenic Quartz in Paleogene ES 3 and ES 4 Shales, Dongying Sag

ABSTRACT Authigenic quartz is a key mineral controlling reservoir quality and rock brittleness in continental shales; however, its silica sources and diagenetic evolutionary pathways in lacustrine fine‐grained sediments remain insufficiently constrained. Taking the Paleogene ES3...

Surface Oxidation and Defect Formation Under Five Photoaging Regimes Enhance Cd2+ and Pb2+ Adsorption by Polyethylene and Polyvinyl Chloride Microplastics

Photoaging alters polymer surface chemistry and can thereby regulate the interfacial binding of metal ions by microplastics. In this study, polyethylene (PE) and polyvinyl chloride (PVC) microplastics were exposed for three weeks to five regimes comprising UV-air, UV-ultrapure wa...

Application of anisotropic frequency-dependent inversion to shale reservoirs in the Zhaotong Demonstration Area, Sichuan Basin

Abstract The accurate characterization of fracture density and gas saturation is crucial for successful shale gas reservoirs developments. We present an integrated approach that combines rock physics modeling with anisotropic frequency-dependent inversion to characterize shale re...

Pretrained 3D Molecular Representations Enable Data-Efficient Discovery of High-Energy-Density Fuels

High-energy-density hydrocarbon (HEDH) fuels are essential for aerospace propulsion, yet the design of such fuels is limited by the scarcity of reliable property data. In this work, we fine-tuned Uni-Mol, a pretrained three-dimensional (3D) molecular representation learning frame...

Simulation study of sulphur deposition in high‐sour natural gas reservoirs based on the lattice Boltzmann method

Abstract In the development of high‐sour gas reservoirs, sulphur deposition is a major cause of reservoir damage and gas well productivity decline. This study adopts the lattice Boltzmann method (LBM) to construct a multi‐physics coupled model incorporating flow, temperature and...