Sinopec (China)

Salt Dissolution–Induced Permeability Enhancement and Its Implications for Improved Oil Recovery During Waterflooding in Saline Lacustrine Carbonate Reservoirs

Waterflooding in saline lacustrine carbonate reservoirs frequently induces dissolution of soluble salt minerals, a process that substantially alters pore architecture and transport properties. However, the quantitative relationship between salt dissolution, permeability evolution...

Numerical investigation of flow and heat transfer characteristics of supercritical CO2 in metal foam for Brayton cycle heat exchangers

The supercritical CO 2 (sCO 2 ) Brayton cycle offers great potential for compact, high-efficiency power systems, but conventional heat exchangers struggle to meet extreme thermal demands under high-parameter conditions. Open-cell metal foams offer a promising solution for heat tr...

An Improved Workflow for Shale Resource Assessment: Demonstrated Using Triassic Chang 73 Shale

Abstract In the context of energy structure transition, fossil fuels will continue to play a crucial role in the near- to medium-term future. Globally widespread shale deposits possess significant resource potential and have become key targets for energy exploration, amid growing...

Study on the Evolution and Driving Factors of Shallow Groundwater Depth in Zhengzhou City

Groundwater is one of the main water supplies for Zhengzhou City. Changes in groundwater depth negatively affect the water supply and geological stability of the city. Based on groundwater monitoring data from 1999 to 2024, this paper investigates the spatiotemporal changes in sh...

Hydrogen Blending in Natural Gas: Technologies and Challenges

Abstract In this paper, a comprehensive review of the technologies and challenges associated with hydrogen-blended natural gas (HBNG) systems is provided. The background, hydrogen production pathways, blending technologies, and implementation strategies of HBNG were systematicall...

Investigation on Photovoltaic Power Forecasting Model Using Sensitivity Analysis

Photovoltaic (PV) power forecasting is challenged by high-dimensional input features that cause redundancy and overfitting. To address this, we propose a short-term PV forecasting model integrating a CNN-LSTM architecture with active subspace-based global sensitivity analysis, wh...

Mobility Control and Adsorption-Retention Behavior of an Engineered-Strain-Derived Microbial Polysaccharide in High-Temperature and High-Salinity Porous Media

Abstract Conventional polymers often undergo viscosity loss and performance deterioration in high-temperature and high-salinity reservoirs. A novel microbial polysaccharide system developed from an engineered oil-recovery strain exhibits good temperature and salt tolerance as wel...

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...

A Study on Pyrolysis Characteristics and Product Release Mechanisms of Oil Shale

Abstract To investigate the effects of reaction atmosphere on the oxidative thermal conversion and product-evolution characteristics of oil shale, Maoming oil shale and its extracted kerogen were examined by thermogravimetric analysis (TG) and simultaneous thermal analysis couple...

Numerical Simulation Study on Unstable Water Injection in Shale Oil Reservoirs Considering Stress Sensitivity and Threshold Pressure Gradient

Unstable water injection is widely used in low-permeability shale oil reservoirs, but its performance under the combined effects of stress sensitivity and threshold pressure gradient remains uncertain. This study aims to determine how these two mechanisms jointly affect unstable...

Photoredox Nickel- or Copper-Catalyzed C–Heteroatom Cross-Coupling of Thianthrenium Salts

Abstract C–heteroatom bonds represent core structural motifs within the scaffolds of pharmaceuticals, agrochemicals, and functional materials. Consequently, developing mild and efficient methodologies for their construction is of paramount importance in modern organic synthesis....

Coupled fate and cascading risks of PFAS and heavy metals/metalloids along the soil-plant-human continuum: A critical review

Per- and polyfluoroalkyl substances (PFAS) and heavy metals/metalloids frequently co-occur in soils at industrial, e-waste and fire-training sites and in biosolid- or wastewater-affected agricultural systems. Yet their coupled fate and cascading risks along the soil–plant–human c...

Mechanisms of Overpressure Formation and Distribution Prediction in Ultra‐Deep Carbonate Reservoirs in the YB Area, Sichuan Basin

ABSTRACT Understanding the formation mechanisms and predicting the distribution of abnormally high pressure in marine carbonate reservoirs are fundamental to ultra‐deep hydrocarbon exploration. This study investigates the ultra‐deep carbonate grain‐beach reservoirs of the second...

Astronomical forcing and coal accumulation model of the Middle Jurassic Xishanyao Formation in the Turpan–Hami Basin, Northwestern China

The Xishanyao Formation in the Taibei Depression of the Turpan–Hami Basin consists predominantly of coal-bearing fluvial and lacustrine deposits characterized by frequent interbedding and systematic vertical facies transitions. These strata exhibit repetitive stacking patterns an...

Theory, technologies, and practice of oilfield-geothermal co-development in the Bohai Bay Basin

Abstract Driven by the global energy transition and China's dual-carbon goals, oil and gas field development faces challenges in achieving sustainable development. Oilfield-geothermal co-development (OGC) offers a pathway for revitalizing mature oilfields and supplying low-carbon...

Selective Adsorption of Methyl Acetate from Model Fischer–Tropsch Synthetic Oil on 13X Zeolite: Experimental and Computational Insights

Abstract The efficient removal of ester oxygenates from Fischer–Tropsch (FT) synthetic oil remains challenging due to limited understanding of selective adsorption mechanisms and adsorption kinetics. Herein, a combined experimental and theoretical approach was employed to investi...

Prediction of Corrosion and Related Damage States in High-Temperature Equipment Using Mechanism and Data Fusion

High-temperature equipment in the petrochemical industry can develop multiple forms of damage during long-term service, with corrosion often accounting for a relatively high proportion. The presence of other damage forms complicates corrosion identification and equipment conditio...

A Saturation-Constrained Four-Phase Acoustic Screening Model for Shallow Gas-Bearing Permafrost: Coupled Effects of Ice Cementation, Gas Saturation, and Pore Pressure

Shallow free gas trapped within or beneath polar permafrost can be destabilized by drilling-induced thermal and pressure perturbations, but its acoustic response is difficult to separate from variations in lithology and freezing state. This study develops a saturation-constrained...

Palaeoenvironment and Productivity-Driven Organic Matter Enrichment in the Upper Permian Dalong Formation Shales, Northeastern Sichuan Basin

Abstract The Upper Permian Dalong Formation in the northeastern Sichuan Basin contains organic-rich siliceous shales deposited in the Kaijiang–Liangping Trough, but the relative roles of productivity, redox conditions, and nutrient supply in organic matter enrichment remain debat...

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...