Synthesis of biopolymer nanocomposites and experimental investigation on enhanced oil recovery
Available online 19 August 2025
Nanoparticles (NPs) are widely used in the petroleum industry, particularly in upstream and downstream applications, due to their quantum effects and high surface area-to-volume ratio. However, stable...
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Study on the conductive mechanism and saturation model of continental shale oil reservoirs with complex mineral composition
Available online 19 August 2025
A variety of petrophysical experimental techniques were used to analyze the core samples of the Subei Basin, China, and a three-dimensional digital rock model was constructed. The electrical simulation...
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Coking behavior during the cooling process of cracked hydrocarbon fuels: Characterization of coke and elucidation of condensation coking mechanism
Available online 18 August 2025
The active cooling technology of endothermic hydrocarbon fuels is a key way to solve the thermal protection of high-speed aircraft engines, but the condensation coking problem during engine shutdown...
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Method for determining the installation interval of Vortexing Cuttings Removal Tool and its mechanism
Available online 14 August 2025
Recent advancements in drilling technology have driven substantial progress in cuttings removal tool development, particularly for addressing borehole cleaning challenges in highly deviated directional...
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Deep Feature Learning for Anomaly Detection in Gas Well Deliquification using Plunger Lift: A Novel CNN-based Approach
Available online 12 August 2025
Timely anomaly detection is critical for optimizing gas production in plunger lift systems, where equipment failures and operational issues can cause significant disruptions. This paper introduces a...
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Quantitative evaluation of lateral sealing of faults in metamorphic rocks: A case study of Bohai Bay Basin in China
Available online 11 August 2025
The Archean buried-hill metamorphic reservoirs in the Bohai Bay Basin are examples of metamorphic rocks having faults with diverse strikes as a consequence of multi-phase tectonic evolution. For faults...
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Improved probabilistic seismic AVO inversion constrained by instantaneous phase using quadratic PP-reflectivity approximation and IA2RMS-Gibbs algorithm
Available online 11 August 2025
Seismic amplitude variation with offset (AVO) inversion is a cornerstone of oil and gas reservoir prediction, enabling the estimation of subsurface elastic parameters and characterization of stratigraphic...
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Modification of the Bubble Drag Force Model and Prediction of Gas-Liquid Two-Phase Flow Dynamics in Blade-Type Multiphase Pumps
Available online 11 August 2025
In multiphase pumps transporting gas-liquid two-phase flows, the high-speed rotation of the impeller induces complex deformations in bubble shapes within the flow domain, making the prediction of gas-liquid...
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Focusing mechanism and anisotropy correction of array induction logging responses for shale reservoirs in horizontal wells
Available online 11 August 2025
We have developed a novel method for correcting resistivity anisotropy in array induction logging (AIL) for shale reservoirs drilled with horizontal wells. This method is featured by two aspects: simplifying...
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Automated labeling and segmentation based on segment anything model: Quantitative analysis of bubbles in gas–liquid flow
Available online 11 August 2025
The quantitative analysis of dispersed phases (bubbles, droplets, and particles) in multiphase flow systems represents a persistent technological challenge in petroleum engineering applications, including...
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Terrestrial paleoenvironmental response of Early Eocene Climate Optimum: implications for organic matter enrichment in the South China Sea
Available online 11 August 2025
The Early Eocene Climate Optimum (EECO) represents the peak of the early Paleogene greenhouse climate. However, a comprehensive understanding of the terrestrial paleoenvironmental response to the EECO...
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Quantitative evaluation of brittleness anisotropy and its influencing factors in terrestrial shale
Available online 9 August 2025
Brittleness is pivotal in predicting shale reservoir quality and designing hydraulic fracturing strategies. However, intricate diagenetic environment of shale, characterized by distinct bedding structures,...
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Joint PP and PS seismic inversion using predicted PS waves from deep learning
Available online 9 August 2025
Seismic AVO/AVA (amplitude-versus-offset or amplitude-versus-angle) analysis, based on prestack seismic angle gathers and the Zoeppritz equation, has been widely used in seismic exploration. However,...
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A cascaded pipeline defect detection and size estimation method based on the YOLOv11 and physics-informed network using the MFL data
Available online 9 August 2025
Long-distance oil and gas pipelines are crucial in the global energy network. However, due to complex internal and external environments, defects can be formed on a pipeline’s surface, posing severe...
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The formation mechanism of high-quality clastic rock reservoir controlled by coupling of "structure-lithofacies-fluid" in the foreland thrust belt in northern Kuqa, Tarim Basin, Northwestern China
Available online 8 August 2025
The formation mechanisms of deep high-quality reservoirs in the Dibei area of Kuqa Depression foreland thrust belt were investigated through an integrated multidisciplinary approach combining petrographic...
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Analysis on adsorption capacity of coal, gas content and methane carbon isotope characteristics in coal: A case study from Southwestern Qinshui Basin,China
Available online 8 August 2025
The methane adsorption capacity, gas content, and carbon isotope characteristics of coal are crucial parameters that determine the productivity of coalbed methane (CBM) wells and their development potential....
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Enhanced oil recovery with a thermo-thickening viscoelastic surfactant: A comparison with polymer
Available online 8 August 2025
High-molecular-weight partially hydrolyzed polyacrylamide (HPAM) has extensively used in enhanced oil recovery (EOR) process; however, it suffers from poor injectivity into low-permeability oil reservoirs...
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Incremental dimensionality reduction for efficiently solving Bayesian inverse problems
Available online 8 August 2025
The inversion of large sparse matrices poses a major challenge in geophysics, particularly in Bayesian seismic inversion, significantly limiting computational efficiency and practical applicability...
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Self-sealing control principle and technology of in-situ temperature pressure preserved coring for deep oil and gas
Available online 8 August 2025
Accurately evaluating the quality and scale of deep oil and gas reservoirs is the key to effectively exploring and developing deep oil and gas resources. Changes in temperature and pressure can cause...
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A novel fusion of interpretable boosting algorithm and feature selection for predicting casing damage
Available online 8 August 2025
Casing damage resulting from sand production in unconsolidated sandstone reservoirs can significantly impact the average production of oil wells. However, the prediction task remains challenging due...
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Effects of natural fractures in cap rock on CO2 geological storage: Sanduo Formation and Dainan Formation of the early Eocene epoch in the Gaoyou Sag of the Subei Basin
Available online 7 August 2025
During the CO2 injection and geological storage process, the integrity of the cap rock significantly influences the long-term safety of CO2 storage. Natural fractures within the cap rock serve as potential...
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An experimental study on Huff-and-Puff oil recovery for tight-tuff heavy oil reservoirs by synergistic with viscosity reducer and CO2 utilizing online NMR technology
Available online 7 August 2025
The tight-tuff heavy oil reservoir exhibits severe heterogeneity and is characterized by high density, high viscosity, and a high wax content, posing significant challenges for its development. While...
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The genetic mechanism of salt minerals in Fengcheng Formation in Hashan area, northwestern margin of Junggar Basin
Available online 6 August 2025
The Fengcheng Formation in the Hashan area, located on the northwestern margin of the Junggar Basin, represents a saline-alkaline lake facies with fine-grained mixed sedimentation. This formation is...
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Geochemistry and genesis of marine shallow gas in the Pearl River Mouth Basin (PRMB), South China Sea
Available online 6 August 2025
In the Pearl River Mouth Basin of the northern South China Sea, extensive commercial shallow gas reservoirs have recently been discovered. However, their formation mechanisms remain poorly constrained....
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Thermal Maturity Effect on the Microscopic Pore Structure and Gas Adsorption Capacity of Shale Gas Reservoirs: A Review
Available online 6 August 2025
Organic matter (OM) is the primary gas occurrence carrier in shale reservoirs due to their abundant nanopores. To reveal the OM pore structure, adsorption capacity and evolution during thermal maturation,...
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