Wettability-aware phase-field micro-continuum modeling of two-phase carbonate acidizing with residual CO2
Available online 21 April 2026
Following pre-CO2 fracturing of carbonate reservoirs, residual CO2 remaining in and remobilized from the wellbore-fracture system may introduce multiphase-flow and interfacial effects that are often...
Artificial intelligence in petroleum and natural gas prospect evaluation and prediction
Available online 21 April 2026
Artificial intelligence has shown great performance and considerable potential in petroleum and natural gas prospect evaluation and prediction (PPEP). Multiple machine learning (ML) and deep learning...
Dynamic evolution of stress interference during the multi-layer exploitation of sand-shale interacted continental shale oil reservoirs
Available online 21 April 2026
Accurate prediction of stress evolution induced by production pressure depletion after hydraulic fracturing is essential for efficient development of stacked continental shale reservoirs. This study...
Oil–source correlation between Paleozoic oils and the Ediacaran Salt Range Formation source rock in the Potwar Basin, Pakistan: Insights from biomarker and isotopic investigation
Available online 21 April 2026
The Ediacaran Salt Range Formation (ESRF) (<551 Ma) is a key Precambrian source rock horizon in the Potwar Basin (PTB), with high TOC content range from 1.17 to 36.16 wt.% and predominantly composed...
Characteristic reflection wave-equation traveltime inversion using full gradient
Available online 21 April 2026
With the advancement of oil and gas exploration into deepwater and deep formations, constructing accurate velocity models from reflection wave data has become essential for seismic imaging. The wave-equation-based...
Machine learning–driven prediction of profile control effect in oil reservoir based on relative production difference
Available online 21 April 2026
Traditional prediction methods have limited accuracy, and there are varying degrees of deviation between predicted oil production and actual oil production after implementation of the measures. In order...
Energy-driven damage constitutive model of thermal insulation materials for deep rock in-situ temperature-preserved coring
Available online 21 April 2026
Accurate evaluation of deep oil and gas reservoirs critically depends on key properties such as rock porosity and permeability, which are significantly affected by high-temperature conditions in deep...
Improved AVA imaging for vector-based elastic reverse time migration using angle-domain dot-product imaging condition
Available online 21 April 2026
This paper proposes modified angle-domain dot-product imaging conditions for vector-based elastic reverse time migration, which yields PP and PS angle gathers that capture improved amplitude-versus-angle...
Genesis of lamina combinations and intelligent well-logging interpretation in the upper Xiaganchaigou Formation, Yingxi area, Qaidam Basin, China
Available online 17 April 2026
The laminar sedimentary structures of saline lacustrine mixed rocks affect both organic matter enrichment and reservoir storage performance. However, due to the small-scale nature of laminae, large-scale...
Chemical plugging systems for preventing gas channeling in CO2 flooding: Progress and prospects
Available online 17 April 2026
As an important component of carbon capture, utilization, and storage (CCUS), CO2 flooding technology can improve oil recovery while realizing CO2 geological storage. However, due to reservoir heterogeneity...
Unveiling the multiscale dissolution pathways of asphaltene deposits in a natural deep eutectic solvent (NaDES)
Available online 17 April 2026
Heavy crude oil contains high levels of asphaltenes, which tend to aggregate and deposit in reservoir pores and pipelines, severely hindering recovery, transportation, and refining. To address the challenge...
Cooperative optimization of well-spacing and fracturing in tight reservoirs
Available online 17 April 2026
The recovery factor of tight oil reservoirs is comprehensively controlled by formation geological properties, well spacing, and fracturing intensity. Insufficient formation drainage or fracture-hits...
Creep properties of fractured hydrate-bearing sediments
Available online 14 April 2026
Long-term extraction of natural gas hydrates can induce reservoir creep, leading to geological hazards such as submarine landslides and wellbore instability. The presence of widespread natural fractures...
A novel ultra-high-temperature emulsifier stable at 250°C for oil-based drilling fluids: Synthesis, performance, and mechanism
Available online 13 April 2026
The ultra-high temperature conditions encountered in deep oil and gas exploration represent a critical challenge to oil-based drilling fluid (OBDF) technology. Conventional emulsifiers suffer from rapid...
A prediction method for safe mud density of natural gas hydrate reservoirs under temperature-pressure dual control
Available online 13 April 2026
Wellbore instability is one of the most encountered issues during hydrate exploration, which correlates with mud density and temperature. However, current studies ignore the effect of mud temperature...
Miscibility enhancing agents for improving oil recovery of CO2 flooding in low-permeability reservoirs: A study based on core displacement and nuclear magnetic resonance
Available online 13 April 2026
CO2 miscible flooding is a key method to improve oil recovery. However, under most reservoir conditions, CO2 cannot achieve miscibility with crude oil. Therefore, reducing the minimum miscible pressure...
Phase-based polarized direct envelope inversion with total variation regularization for simultaneous source seismic data: Application to SEG 2014 Chevron blind test dataset
Available online 13 April 2026
In subsalt hydrocarbon exploration, the strong velocity contrast associated with salt structures poses significant challenges to conventional full waveform inversion (FWI) method. While direct envelope...
TransUNet framework improved computed tomography image segmentation for core pore evolution
Available online 10 April 2026
The development of oil and gas is constrained by difficulties in dynamically characterizing pore structures. Traditional methods inadequately represent the complex interactions between mineral dissolution,...
Embedment behavior of variable-radius indenters in shale: A combined experimental and theoretical approach
Available online 9 April 2026
During the shale gas extraction, a larger fracture closure stress causes proppants to embed in the shale surface, greatly reducing fracture conductivity. The heterogeneity of shale makes its mechanical...
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...