A more efficient subsidy policy for CO2 enhanced oil recovery: Insights from a vertically integrated business model
Available online 28 November 2025
Although carbon dioxide enhanced oil recovery (CO2-EOR) is a technically and economically viable option within carbon capture, utilization, and storage (CCUS), its transition from demonstration to commercial...
Analysis of solidification process and gas sealability of Sn58Bi alloy plugging casing
Available online 27 November 2025
The Sn58Bi alloy plug, composed of 58% bismuth (Bi) and 42% tin (Sn), emerges as a promising alternative to conventional cement plugs. Investigating its mechanical behavior throughout the molten-to-solidified...
A Hierarchical Bayesian–MCMC Model for Predicting the Geometric Dimensions of Corrosion Defects in Wet Gas Gathering Pipelines
Available online 26 November 2025
Internal corrosion is a major threat to the safety of natural gas pipelines, with defect geometry—depth, length, and width—playing a critical role in structural integrity assessments. While corrosion...
Study on the phase behavior and minimum miscible pressure of CO2-shale oil in nanopores with confinement effect
Available online 25 November 2025
CO2 injection is a significant enhanced oil recovery method in shale oil reservoirs and facilitates the mitigation of CO2 emissions. However, the phase behavior and miscibility process of light shale...
A numerical study on blending hydrogen into natural gas pipeline by the SMV static mixer: Mixing performance and mass transfer mechanism
Available online 22 November 2025
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...
Application of acrylic-based wellbore strengthening material in water-based drilling fluid to stabilize the fractured formation
Available online 22 November 2025
Wellbore instability is the main challenge encountered during borehole construction, particularly when employing water-based drilling fluid (WBDF) under complex geological conditions. A novel wellbore...
Numerical investigation of natural gas-enhanced autothermic pyrolysis for optimizing in-situ conversion in oil shale
Available online 22 November 2025
The autothermic pyrolysis in-situ conversion process for oil shale (ATS) offers the advantages of low development costs and the capability to exploit deep oil shale resources. However, oil shale formations...
Effect of weak consolidation process of liquid bridge on interparticle mechanical behavior of clathrate hydrate
Available online 22 November 2025
Clarifying the mechanism that results in the mechanical behavior differences of hydrate particles in different states is of great significance for understanding the agglomeration mechanism of hydrate...
A novel local maximum synchrosqueezing W transform for reservoir characterization
Available online 21 November 2025
Time-frequency analysis (TFA) serves as a critical tool in seismic signal processing and interpretation, particularly for characterizing non-stationary signals. However, conventional TFA methods, such...
Hydrate phase equilibria in oil-containing fluid: Experimental investigation and machine learning prediction based stacked ensemble
Available online 21 November 2025
During oil and gas development and transportation, the presence of oil and complex component in natural gas significantly impacts the hydrate phase equilibrium. However, the specific characteristics...
Seepage and blockage characteristics of methane hydrate-bearing porous media under different hydrate distribution conditions
Available online 21 November 2025
Blockage commonly occurs in and severally affects natural gas (mainly methane) reservoir exploitation, combustion ice (methane hydrate) exploitation and oil and gas pipeline transportation. The formation...
Geochemical heterogeneity of ultra-deep oil pyrolysis: Nanoscale infrared spectroscopy insights
Available online 21 November 2025
The heterogeneous cracking process of ultra-deep oil is well-studied, yet the geochemical evolution mechanisms of crude oil pyrolysis at the microscale remain unclear. This study conducts a closed-system...
Dynamic evolution of residual oil during long-term waterflooding in Middle East carbonate reservoirs: A pore-scale investigation
Available online 20 November 2025
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...
Synergistic alginate chelation and semi-interpenetrating network for advanced wellbore stabilizing hydrogels
Available online 20 November 2025
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...
Pore scale phase behavior of condensate gas in porous media: Insights from 2D NMR T1–T2 spectrum method
Available online 20 November 2025
The widespread development of unconventional oil and gas reservoirs has advanced reservoir research to the nanoscale level. Under the influence of nanoscale confinement effects, the phase behavior of...
Comparing the thermal processing with slurry phase hydroupgrading to increase the yields of distillates of Arabian heavy crude oil
Available online 20 November 2025
With the increasing heavy and inferior quality of global oil resources, the efficient utilization of crude oil has become a critical challenge to be solved in the energy field. This work intends to...
Carbon isotopes of asphaltene-occluded hydrocarbons: A proxy for bitumen vein source identification in northwest Sichuan Basin, China
Available online 20 November 2025
The Lower Cambrian bitumen veins in northwestern Sichuan Basin originated from Precambrian paleo-oil reservoirs, yet the severe alterations of bitumen and high maturity of potential source rocks challenge...
Mechanical characteristic and damage mechanism of carbon/glass composites in offshore oil exploration
Available online 20 November 2025
Carbon/glass hybrid rods exhibit superior tensile strength, low weight, and exceptional corrosion resistance. However, rod splitting presents a considerable challenge to their practical applications,...
Simultaneous damage diagnosis of casing using interpretable multi-label classification
Available online 19 November 2025
Casing damage poses a significant challenge, severely compromising well integrity and production efficiency in oilfields. However, most existing studies typically focus on predicting only a single type...
Experimental study of imbibition depth and oil migration mechanism of a magnetic nanofluid for low-permeability reservoir oil recovery improvement
Available online 18 November 2025
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,...
Double-crosslinked self-degradable hydrogel for temporary plugging in low temperature reservoirs
Available online 15 November 2025
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)...
Study of the effect of nanoemulsion on the EOR in low-permeability, highly waxy oil reservoirs based on NMR displacement experiments
Available online 13 November 2025
Wax precipitation damage caused by cold water injection or temperature reduction is very commonly seen in the development of waxy crude oil reservoirs. Various methods for eliminating wax precipitation...
Charge-structure synergy in reservoir wettability reversal: Investigating with an integrated optical-multiscale framework
Available online 13 November 2025
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 machine learning method for evaluating shale gas production based on the TCN-PgInformer model
Available online 13 November 2025
Since shale gas is a valuable energy resource, effective planning for its extraction and utilization depends on precise forecasting of gas well production. Conventional models need long computation...
Long-term sustained release of small molecular surfactants using microcapsules
Available online 13 November 2025
The controlled manipulation of surfactant concentration is essential for optimizing performance in numerous industrial applications, such as enhanced oil recovery in oil industry. However, encapsulating...