Potential origin of natural vanadium hydride in the Earth’s shallow mantle
Available online 8 April 2026
Metal hydrides have emerged as promising candidates for energy storage in clean hydrogen systems. While these materials are typically synthesized under controlled laboratory conditions, naturally occurring...
Bifunctional heterojunction catalyst adsorption-promoted catalytic oxidation of aromatic sulfides high-value conversion
Available online 8 April 2026
With the increasing need for high-value utilization of diesel components, catalytic oxidative desulfurization (ODS) emerges as an efficient non-hydrogenation approach to desulfurization and utilization...
Large-scale 3D experimental study on in-situ pyrolysis of tar-rich coal (I): Heat transfer behavior and product characteristics under conductive heating
Available online 7 April 2026
Conduction heating is a key method for in-situ pyrolysis of tar-rich coal. However, the temperature and pressure characteristics, oil and gas production mechanisms, and reaction zone characteristics...
Axial-torsional-lateral vibration model of drill bit considering axial and lateral cutting effects
Available online 6 April 2026
In ultra-deep well drilling, the drill bit undergoes severe axial-torsional-lateral coupled vibrations, such as stick-slip and whirling, significantly increasing drilling risks. The evolution laws of...
Ultrasonic velocity-based model for water holdup prediction in polymer-oil-water flows
Available online 6 April 2026
Polymer flooding significantly enhances crude oil recovery, but its complex rheological properties pose challenges to traditional water holdup measurement. We conduct experimental studies in a 20-mm...
Multi-order evolution of lacustrine shale sedimentary structures in Qingshankou Formation of Songliao Basin, NE China, and its implications
Available online 6 April 2026
Fine-grained sedimentology is crucial to understanding paleoclimatology and unconventional oil and gas sedimentology. However, the controlling factors and evolutionary patterns of sedimentary structures...
Study on gas-liquid counter-current flow behavior and calculation of key killing parameters using bullheading well control method in directional wells
Available online 4 April 2026
The formation pressure system of deep and ultra-deep carbonate reservoirs is complex, with widespread fracture development and a narrow safety pressure window. The use of conventional cyclic well control...
Effects of salinity variations on shale imbibition behavior: Insights into the microscopic mechanisms
Available online 4 April 2026
Shale reservoirs contain abundant micro/nanoscale pores, which facilitate capillarity-dominated imbibition as an effective mechanism for enhancing hydrocarbon recovery. During hydraulic fracturing,...
Hessian-based elastic reflection waveform inversion with scale fusion strategy
Available online 4 April 2026
Full waveform inversion (FWI) theoretically has the potential to recover high-resolution and accurate velocity models. However, FWI primarily relies on refractions and turning waves, and therefore often...
A rock physics modeling for hydrate–gas and gas–water mixing in marine sediments
Available online 2 April 2026
In 2017 and 2020, China successfully performed two hydrate production tests near Sites GMGS3-W17 and GMGS6-SH2 in the northern South China Sea. Two tests revealed that large amounts of free gas are...
Insight into mass transfer mechanism of CO2–N2 mixed gas with oil
Available online 1 April 2026
The appropriate selection of CO2–N2 mixed gas is critical for cost-effective and efficient gas flooding in enhanced oil recovery. Optimizing this process requires a molecular-level understanding of...
Energy-efficient fracturing based on stress-coupled perforation
Available online 1 April 2026
Hydraulic fracturing (HF) in horizontal wells frequently encounters challenges such as uneven fracture propagation and elevated energy consumption, largely due to stress shadow effects and perforation...
Integration of multi-source geological engineering data for fracturing parameter optimization model
Available online 1 April 2026
Fracturing parameter design is critical to the economic viability and effectiveness of reservoir stimulation, making multi-stage hydraulic fracturing in horizontal wells a cornerstone technology for...
Experimental study of imbibition depth and oil migration mechanism of a magnetic nanofluid for low-permeability reservoir oil recovery improvement
March 2026
Nanofluids are considered promising agents for enhanced oil recovery in low-permeability reservoirs, but their application is often restricted by poor thermal and saline resistance and high costs. Moreover,...
Dynamic evolution of residual oil during long-term waterflooding in Middle East carbonate reservoirs: A pore-scale investigation
March 2026
Long-term water flooding (LTWF) is an efficient way to improve oil recovery (EOR) in carbonate reservoirs in the Middle East. Due to the complex depositional environment and intricate pore-throat structures...
Unconventional oil production forecasting based on PiAM meta-learning
March 2026
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...
OFC
March 2026
Irregularly seismic data interpolation based on deep learning with integrated channel-spatial attention mechanism
March 2026
To address the challenges of irregular sampling and insufficient spatial sampling in field seismic data, this study proposed a deep learning-based interpolation method incorporating dual channel spatial...
A micro-crosslinked amphiphilic copolymer viscosifier for high temperature and high-density inorganic salt completion fluids
March 2026
Solid-free brine completion fluids, characterized by their exceptional reservoir protection capabilities and optimal rheological behavior, are highly desirable for applications in oil and gas reservoirs...
Study on prediction of annular trap pressure in ultra-high temperature and high pressure gas wells
March 2026
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...
A novel application of a stepwise extraction protocol: resolving the challenge of biomarker detection in high-maturity shale systems
March 2026
Biomarkers in source rocks are crucial in uncovering biological source and depositional environment. However, the detection of critical biomarkers such as steranes and terpanes in high-maturity source...
Double-crosslinked self-degradable hydrogel for temporary plugging in low temperature reservoirs
March 2026
Temporary plugging agents are critical to oilfield operations such as diversion fracturing, wellbore interventions, and drilling. This study develops a double-crosslinked self-degradable gel (DSDG)...
Synergistic alginate chelation and semi-interpenetrating network for advanced wellbore stabilizing hydrogels
March 2026
In situ plugging hydrogels represent a promising strategy to combat wellbore instability in fractured formations. Despite their potential, they often fail due to unpredictable gelation kinetics and...
Charge-structure synergy in reservoir wettability reversal: Investigating with an integrated optical-multiscale framework
March 2026
Reservoir wettability modification is a key strategy for enhancing oil recovery (EOR), yet the mechanisms driving this reversal remain incompletely understood due to the scarcity of multiscale characterization...
A numerical study on blending hydrogen into natural gas pipeline by the SMV static mixer: Mixing performance and mass transfer mechanism
March 2026
Hydrogen is an important clean energy carrier that contributes to the carbon neutrality by reducing the dependence on fossil fuels. As its role in the global energy system continues to expand, the demand...