A new method for fluid saturation calculation in low resistivity oil reservoirs with nuclear magnetic resonance-constrained triple-water resistivity model
Available online 19 December 2025
To address the evaluation difficulty of hydrocarbon saturation in low resistivity reservoirs, an innovative method for calculating oil saturation is proposed using a nuclear magnetic resonance (NMR)-constrained...
Pore preservation mechanism and conceptual model of fine-grained sedimentary rocks of Qiongzhusi Formation in Deyang–Anyue rift trough, Sichuan Basin
Available online 19 December 2025
To elucidate the role of effective pore preservation in controlling shale gas enrichment and high yield. This study focuses on fine-grained sedimentary shale of the Qiongzhusi Formation in Sichuan basin,...
Deep reparameterization for full waveform inversion: Architecture benchmarking, robust inversion, and multiphysics extension
Available online 19 December 2025
Full waveform inversion (FWI) is a high-resolution subsurface imaging technique, but its effectiveness is limited by challenges such as noise contamination, sparse acquisition, and artifacts from multiparameter...
Multi-task U-net inversion of synthetic look-ahead logging-while-drilling data
Available online 18 December 2025
Electromagnetic look-ahead logging while drilling instruments detect the electrical characteristics of undrilled formations, enabling proactive decision-making. Real-time geological insight ahead of...
Failure mechanism and structure optimization of sand control screen in water-bearing gas well
Available online 18 December 2025
The prospect of natural gas reservoir is broad. As the mining channel, the state of gas well determines the mining efficiency of the whole natural gas reservoir. After long-term mining of gas wells,...
Finite-difference heterogeneous multiscale method for elastic Helmholtz equation in isotropic media
Available online 18 December 2025
The elastic Helmholtz equation is capable of readily simulating attenuation and dispersion behaviors of the elastic wave and performing full-wavefield modeling in wave-equation-based elastic inversions...
Advances in Intelligent Defect Recognition Method for Oil and Gas Pipeline Weld X-Ray Image
Available online 17 December 2025
Long-distance pipelines are essential for transporting oil and gas, with the quality of welds directly affecting their safety and reliability. Weld defects can emerge during the welding process due...
Paleoenvironmental and paleoclimatic evolution of the Piçarras Formation, Santos Basin, Brazil, from cuttings and well logs
Available online 17 December 2025
Reconstructing syn-rift paleoenvironmental systems requires an understanding of the complex interplay among tectonics, climate, and lacustrine sedimentation, which is crucial for petroleum exploration....
Development of mahua oil (Madhuca indica) methyl ester based drilling mud as a sustainable alternative to oil based mud for unconventional reservoirs
Available online 17 December 2025
The exploration of untapped unconventional reservoirs has increased to fulfill the growing global demand for energy. Traditionally, oil-based mud (OBM) is preferred for drilling such formations; however,...
Unveiling the role of Janus nanoparticle shape in trapped oil displacement: A molecular perspective
Available online 17 December 2025
Janus nanoparticles (JNPs) exhibit significant promise for enhancing oil recovery (EOR). However, their large-scale field deployment remains challenging. A key challenge lies in the insufficient understanding...
A novel approach to evaluating remaining oil potential using dynamic connectivity and bivariate mapping in large-scale reservoirs
Available online 16 December 2025
In the development of water flooding reservoirs, enhancing oil recovery often requires implementing measures tailored to the reservoir's specific characteristics. A critical step in this process is...
Unconventional oil production forecasting based on PiAM meta-learning
Available online 16 December 2025
Accurate production forecasting serves as a critical determinant for optimizing extraction strategies, guiding long-term field management in reservoir development. Both conventional methods and deep...
Study on prediction of annular trap pressure in ultra-high temperature and high pressure gas wells
Available online 15 December 2025
Accurate calculation of annular trap pressure in ultra-high-temperature and high-pressure (UHTHP) wells is crucial for ensuring the safety and integrity of tubular systems. Existing annular pressure...
The Impact of Fossil Energy Technological Progress on Sectoral Implied Energy Intensity: Evidence from the U.S. Shale Gas Revolution
Available online 13 December 2025
This paper investigates how sectoral implied energy intensity responds to energy technology progress, using the U.S. shale gas revolution—the most significant energy breakthrough of the 21st century—as...
Diagenesis and implication for the reservoir quality of the tight sandstone reservoir in the depression zone of foreland basin, Upper Triassic Xujiahe Formation, Western Sichuan Foreland Basin, China: Evidence from petrography and geochemistry
Available online 13 December 2025
Tight sandstones are products of complex and various diagenetic events that significantly affect reservoir quality and heterogeneity. In this study, tight sandstones of the Upper Triassic Xu3 Member...
Degradable PAM hydrogel mediated by hydroxy acids for temporary plugging
Available online 11 December 2025
In this study, the degradation time of gel plugs was regulated by introducing hydroxy acids to adjust the crosslink density, effectively addressing the challenge of controllable degradation time in...
Biomass-derived amphiphilic nitrogen-doped carbon dots: Molecular design, interfacial regulation, and enhanced oil recovery performance
Available online 11 December 2025
In response to the overlooked influence of precursor molecular structure on interfacial performance in the application of amphiphilic carbon dots (CDs) for enhanced oil recovery (EOR), this study synthesized...
Review: Research on the Development Trends of Measurement While Drilling (MWD) Technology in Oil and Gas Drilling
Available online 11 December 2025
As one of the pivotal technologies in oil and gas field exploration and development, downhole measurement technology provides a scientific basis for reservoir evaluation, drilling optimization, development...
Three-Dimensional Heat Transfer Model of Oil-Water Two-Phase Stratified Flow
Available online 10 December 2025
Oil-water stratified flow, a fundamental pattern in multiphase pipe flow, is commonly encountered in offshore petroleum production and transportation. Although hydraulic characteristics of this flow...
Impact of microwave treatment on rheological properties and structural evolution of waxy crude oil
Available online 10 December 2025
The transportation of waxy crude oil is severely challenged by its high viscosity and tendency to form a gel structure at low temperatures. This study comparatively investigated the effectiveness of...
Dual-modality microwave-conductivity sensing system for flow characterization in high water-cut production wells
Available online 9 December 2025
This study introduces a novel microwave-conductivity dual-modality sensing system for liquid-liquid flow measurement in oilfield water injection. The system combines a flexible microstrip array antenna...
Unlocking the seal capacity of unconsolidated Quaternary hydrate-bearing sediments: carbon isotope gradients as a proxy for dynamic gas trapping efficiency
Available online 9 December 2025
Submarine gas hydrate systems store vast carbon inventories (∼1,500–12,400 Gt C) yet pose dual risks as potential geohazard multipliers and climate feedback agents under oceanic warming. Conventional...
Lateral constrained multi-trace seismic inversion based on deep learning
Available online 9 December 2025
Seismic inversion is a widely used method for exploring and characterizing subsurface geological structures, especially in the context of oil and gas exploration. The data-driven approach exemplified...
Sedimentary heterogeneity-constrained differential diagenesis in fluvial tight sandstones: Implications for reservoir quality heterogeneity in sandbody architectural elements
Available online 8 December 2025
Fluvial tight sandstones, as unconventional reservoirs, feature complex sedimentary, diagenetic, and reservoir quality heterogeneities that fundamentally control their exploration and development. This...
Mechanical, structural, and mineralogical changes of shale under acid-CO2-rock interactions and their implications for CO2 storage
Available online 8 December 2025
Elucidating the underlying chemo-mechanical coupling mechanisms of acid- supercritical carbon dioxide (scCO2) reactions in shale reservoirs is essential for advancing the efficacy and safety of CO2...