Investigation on force responses in ridged diamond element breaking granite
Available online 9 June 2026
Ridged diamond element (RDE), a new 3D shaped PDC cutter, has higher impact and wear resistance than conventional plane PDC cutter. Furthermore, RDE also can significantly improve the rock-breaking...
Numerical study on hydraulic fracture propagation in anisotropic shale considering bedding plane characteristics
Available online 9 June 2026
China possesses abundant shale gas resources. As the core method for enhancing shale gas production, hydraulic fracturing technology has seen increasing application alongside the rapid development of...
The influence of energy enhancement on the morphology of hydraulic fractures based on a fully-coupled XFEM method
Available online 9 June 2026
Pre-fracturing energy enhancement has shown promising potential to improve stimulation performance in low-permeability reservoirs, yet its influence on subsequent hydraulic fracturing remains unclear....
Classification of shale oil micro-occurrence types and flow behavior: Combining QSGSM, pore network, machine learning, and LBM method
Available online 8 June 2026
Shale oil occurs in varying forms within porous media, with diverse micro-occurrences exhibiting intricate topological characteristics within the pores. The impact of shale oil presence on fluid flow...
Advanced fluid-loss control in drilling fluids: A review on rationally designed temperature- and salt-tolerant synthetic polymers
Available online 8 June 2026
To meet the ever-increasing energy demands, oil and gas exploration is progressively extending into deep formations with high temperatures and high salinity, presenting new challenges for the performance...
Laboratory evaluation of an inorganic gel for conformance control in high-temperature gas reservoirs
Available online 8 June 2026
Water invasion is a widely encountered challenge in deep fractured gas reservoirs. Gel treatment is an effective method for controlling excessive water production, yet existing gel systems cannot fully...
In-situ catalytic pyrolysis of oil shale over metal-loaded silicon nanoparticles
Available online 7 June 2026
Oil shale, as an abundant unconventional energy resource, offers significant potential for mitigating the shortage of conventional fossil fuels. However, challenges such as the complex and costly synthesis...
Investigation of secondary formation damage during hematite filter cake removal using acidic reducing systems in carbonate reservoirs
Available online 6 June 2026
The removal of hematite-based filter cakes is essential to restore formation permeability after drilling operations. Although this process is commonly achieved using acidic systems, these fluids can...
A novel abnormal pore pressure prediction framework based on machine learning and drilling–rock mechanics parameter data
Available online 6 June 2026
The Xihu Sag in the East China Sea Shelf Basin exhibits complex geology (e.g., deep faulting and fragmented pressure systems) and anomalous overpressure with pressure reversal in target formations,...
Dynamic evolution of shale oil occurrence in lacustrine shales: Lithological constraints and implications for in-situ conversion
Available online 4 June 2026
The occurrence state of shale oil is crucial for its mobility and development, which is closely linked to petroleum generation and pore system evolution; however, the dynamic coupling between them across...
Staged propagation mechanisms and their implications for fracture interaction and fracture swarm formation
Available online 3 June 2026
Hydraulic fracture swarms are widely observed in post-fracturing core samples, yet their formation mechanisms remain incompletely understood. In this study, we employ a visualized experimental system...
Identifying the magnesium source in hydrothermal dolostone reservoirs: A multi-proxy approach using δ26Mg, δ44/40Ca, and 87Sr/86Sr
Available online 3 June 2026
Dolostone, especially replacement dolostone, is a significant component of Earth's carbonate rock archive. Hydrothermal dolostones, often associated with fault zones, play a crucial role in the dolostone...
Polyacrylamide-assisted synthesis of highly dispersed Ni nanoparticles wrapped by SAPO-11 molecular sieves for enhanced alkane hydroisomerization performances
Available online 3 June 2026
A novel polyacrylamide-assisted method for synthesizing the hierarchical SAPO-11-wrapped Ni catalyst was proposed. In this method, firstly, Ni2+ ions from nickel salts were coordinated with nitrogen...
Seismic lithofacies classification and fault detection using self-organizing maps and convolutional neural networks in the Penobscot Field, Scotian Shelf, Eastern Canada
Available online 3 June 2026
Accurate characterization of lithofacies and fault networks is critical for delineating reservoir architecture, heterogeneity, and compartmentalization in structurally complex hydrocarbon systems. Conventional...
Quantifying the through-going evolution of strike-slip fault zones: Insights from analogue modelling
Available online 3 June 2026
Large strike-slip fault zones commonly develop through-going architectures through progressive linkage of fault segments. However, quantitatively characterizing the through-going evolution of strike-slip...
A nano-micro-continuum framework for liquid flow in multicomponent porous media: Impact of microporosity and microscale effects
Available online 2 June 2026
The multiscale features of shale, along with the inherent presence of microporosity due to current imaging limitations, pose significant challenges in accurately describing oil transport behavior. Microscale...
A resilience-oriented transient optimization approach for emergency operation of natural gas pipeline systems with linepack dynamics and priority-based load shedding
Available online 2 June 2026
Under extreme disturbances, the safety of natural gas pipeline networks is governed by transient capabilities to sustain fuel delivery rather than steady-state balance. Existing studies, often grounded...
Depositional environmental evolution and reservoir controlling effects of the P2x Formation in the Mahu Sag: Insights from the PCA-HCA coupled analysis
Available online 2 June 2026
The conglomerates of the Xiazijie (P2x) Formation in the Mahu Sag are dominated by dissolution pores of zeolite cement as the primary hydrocarbon reservoir spaces. Consequently, the storage characteristics...
Geological fault identification via multi-knowledge causally embedding graph representation applied in underground gas storage
Available online 1 June 2026
Geological fault identification is critical for gas storage safety, yet remains reliant on manual interpretation with inherent inefficiencies. While Artificial intelligent (AI) methods offer alternatives,...
Influence factors of long-term stability of silica-enriched Portland cement under ultrahigh temperatures
Available online 1 June 2026
Downhole high-temperature and high-pressure (HTHP) conditions can cause significant deteriorations of well cement, posing a major risk to wellbore integrity. A comprehensive experimental program is...
Microscopic forces between methane hydrate particle and droplet-wetted sand grain surface in a high-pressure system: Experiments and mechanisms
May 2026
Solving the issue of hydrate formation and blockage in pipelines during deepwater oil and gas development and hydrate-based green energy extraction is a crucial flow assurance safety concern. The micro-forces...
Reutilization of regenerated exhaust gas from the centrifugation-filtration coupled purification system: a closed-loop process
May 2026
The regenerated exhaust gas was reutilized to configure a centrifugation-filtration coupled purification system (CFCPS), aiming to achieve a closed-loop gas purification process. It can be foreseen...
Oxidative cracking performance of low maturity shales at different O2 concentrations
May 2026
Conventional in-situ conversion technologies including electrical heating or injection of hot fluid face development challenges. Low heat transfer efficiency and limited pore expansion restrict its...
Potential application of hydrophobically modified Welan gum as a novel thermo-salt tolerant EOR agent in high-temperature and high-salinity reservoirs
May 2026
Conventional polymeric systems face significant challenges in maintaining performance under high-temperature, high-salinity reservoir conditions due to limited thermal and saline stability. To address...
Effect of CO2 pre-injection on fracture propagation morphology in shale reservoirs under CO2 hybrid fracturing
May 2026
Supercritical CO2 fracturing, as a waterless fracturing technology, is attracting increasing attention in the shale oil reservoir development industry. In recent years, a novel CO2 hybrid fracturing...
