Formation drillability characterization method based on multi-scale convolutional neural representation with stacking ensemble
Available online 6 May 2026
Formation drillability characteristics are critical for optimizing drilling performance and designing bottom-hole assemblies. Accurate estimation of drillability parameters, including uniaxial compressive...
Competitive fracture propagation in Da'an deep shale: A study based on multi-adjacent well collaborative distributed optical fiber monitoring
Available online 6 May 2026
The competitive propagation of hydraulic fractures during multi-cluster stimulations poses a critical challenge to achieving effective reservoir stimulation in deep shale formations. To address this,...
Knowledge-guided deep learning inversion of electromagnetic look-ahead logging-while-drilling data
Available online 6 May 2026
Inversion of electromagnetic look-ahead logging-while-drilling (LWD) data enables real-time estimation of formation properties ahead of the drill bit, providing critical support for proactive geosteering....
Low-temperature oxidation of light crude oil: Molecular composition and deposition characteristics of oxidation products
Available online 5 May 2026
Air flooding is an important enhanced oil recovery technology for light crude oil development. Low temperature oxidation (LTO) occurs when air is injected into light crude oil, a large number of active...
Research progress and development prospects on critical challenges in deepwater riserless drill string dynamics
Available online 5 May 2026
With the ongoing expansion of oil and gas drilling into deeper waters, riserless drilling technology has shown prominent advantages in deepwater drilling applications. The structural design and operational...
Investigating the impact of well data and seismic resolution on porosity prediction using Bayesian deep learning
Available online 4 May 2026
Seismic porosity inversion is inherently ill-posed and highly sensitive to seismic resolution, geological complexity, and well density, particularly in thin-bedded heterogeneous reservoirs. Although...
A novel in situ polymerizing gel–fiber composite system with enhanced strength and degradability for temporary plugging
Available online 4 May 2026
The plugging performance and degradation properties of temporary plugging agents remain critical challenges in diverting fracturing technology for deep, high-temperature reservoirs. Conventional particle-fiber...
Restoration of karst paleogeomorphology and its natural gas geological implications: An example from the Ma5 Member of the Ordovician Majiagou Formation in the central Ordos Basin, NW China
Available online 2 May 2026
Carbonate weathering crust reservoirs have consistently represented a pivotal area of research in hydrocarbon exploitation. Karst paleogeomorphology emerges from the intricate interplay of weathering,...
Imaging enhancement for towed-streamer data using OBN data based on deep learning
Available online 30 April 2026
Deep oil and gas exploration has become a critical frontier in offshore oil and gas development due to growing global energy demand. However, traditional towed-streamer seismic acquisition often struggles...
Trans-layer inversion of logging-while-drilling azimuthal electromagnetic measurements guided by multi-boundary detection capability assessment
Available online 30 April 2026
The inversion of logging-while-drilling azimuthal electromagnetic measurements is essential for geosteering in horizontal wells and optimizing reservoir development. Conventional fixed-layer inversion...
Defining conductivity optimal correlation resolution (COCR) for 3D scanning of acid fracture surface
Available online 30 April 2026
Production from carbonate reservoirs can be significantly improved through acid fracturing. Creating acid fractures with high conductivity is a key factor in enhancing production. 3D scanning technology...
Fault intelligent identification of seismic data using two-stage method based on coherent attribute
Available online 30 April 2026
Faults play a crucial role in the storage and migration of oil and gas, and accurate identification of fault structures is essential for reliable subsurface interpretation and efficient resource development....
Seismic resolution enhancement via Deep Learning with Teacher-Student Network and Domain Adaptation
Available online 29 April 2026
High-resolution processing of seismic signals is crucial for enhancing the ability to characterize underground geological structures in detail and improving the accuracy of thin-layer reservoir identification....
A DBOKS-based hybrid machine learning method for carbonate rock classification
Available online 29 April 2026
Addressing the challenges in carbonate rock lithology identification, such as similar well-logging curve response characteristics, scarcity of transitional lithology samples leading to classification...
Deep learning-based upscaling for reservoir models on corner-point grids via finite-volume physics-informed Fourier neural operator
Available online 27 April 2026
This study proposes a neural network (NN)-assisted, physics-informed framework for global flow-based upscaling to accelerate reservoir simulation. While traditional global upscaling methods can accurately...
Optimizing depressurization timing for enhancing the efficiency of geothermal-assisted co-production of gas hydrate and deep gas
Available online 27 April 2026
The synergistic production of gas hydrates and deep gas reservoirs assisted by the geothermal energy transport via circulating water is significantly influenced by the temporal coordination of reservoir...
Grain-size control on lacustrine fan-delta architecture in source-to-sink steep-slope zones: Insights from field surveys and flume-tank experiments
Available online 25 April 2026
Lacustrine fan deltas, key depositional systems at basin margins, serve as crucial hydrocarbon accumulation sites. Previous studies have largely focused on depositional slope, overlooking the role of...
An unsupervised CNN–transformer method for transient electromagnetic logging inversion under physical–prior constraints
Available online 25 April 2026
Transient electromagnetic (TEM) logging can reflect the electrical properties of formation around the borehole in the time domain, serving as an important method for detecting oil and gas reservoirs,...
Closed-Loop Internal Multiple Elimination
Available online 24 April 2026
Internal multiple suppression is a crucial and challenging task in seismic data processing, aiming to mitigate the impact of internal multiples on imaging and seismic interpretation. A major difficulty...
Electrical resistivity tomography visualization of core-scale evolution to reveal the impact of lithologic heterogeneity on gas hydrate formation in marine sediments
Available online 24 April 2026
Natural gas hydrate represents a significant clean energy resource, whose formation and distribution are critically controlled by sediment heterogeneity. While electrical resistivity tomography (ERT)...
Progress and perspectives on ZSM-22-based catalysts for long-chain n-alkane hydroisomerization
Available online 24 April 2026
Hydroisomerization of long-chain n-alkanes holds significant value in pour point reduction and quality enhancement of fuels, the development of premium lubricants, and the industrial advancement of...
Effect of chain mobility of (poly)siloxane on the hydrophobicity of modified polyurethane sponges with applications in oil-water separation
Available online 22 April 2026
Owing to conformational flexibility of Si–O–Si backbone and low surface energy, (poly)siloxanes are often employed to prepare materials for oil-water separation. However, the effect of molecular structure...
Multiple size group modeling of gas–liquid flow instability and energy conversion in a multiphase pump: Effects of inlet gas volume fraction
Available online 22 April 2026
The variation of inlet gas volume fraction (IGVF) intensifies bubble breakup and coalescence behaviors, and the resulting evolution of gas pockets may directly impact the energy performance and stability...
Stress and frequency dependence of wave reflection and transmission in patchy-saturated porous media
Available online 22 April 2026
Partially saturated porous media are frequently encountered in the subsurface. However, the wave reflection and transmission (R/T) characteristics of such media under in situ stress are not fully understood....
Influence mechanism of adjacent formation interfaces on acoustic wave modes in horizontal wells
Available online 22 April 2026
Although horizontal well technology has been widely adopted in hydrocarbon exploration, acoustic logging interpretation remains challenging under complex formation conditions, particularly when formation...