Stability mechanism and steady-state flow characteristics of oil-resistant foam in high-salinity reservoirs
Available online 10 November 2025
High salinity and high oil content present major challenges to the effectiveness of foam in enhanced oil recovery (EOR). This study introduces RCS, a novel oil-resistant foam system designed for reservoirs...
Mechanistic insights into amine-oxide-modified silica nanoparticle-stabilized Pickering emulsions for enhanced heavy oil recovery in heterogeneous reservoirs
Available online 10 November 2025
To address the critical stability and mobility control limitations of conventional surfactant-stabilized emulsions, this study introduces a novel Pickering emulsion system stabilized by lauramidopropylamine...
Influencing factors and microscopic flow mechanism of shale oil during pressurized spontaneous imbibition in the Lucaogou Formation, Jimusar Sag: An experimental study
Available online 8 November 2025
Crude oil recovery and residual oil distribution at the microscopic pore scale are governed by pore structure, wettability, and imbibition dynamics. However, the evolution of pore structure and wettability...
A novel NMR methodology for the quantitative characterization of solid organic matter in shale oil
Available online 8 November 2025
Continental shale oil reservoirs in China, particularly those of low to medium maturity, contain a high proportion of untransformed solid organic matter (SOM). The SOM plays a critical role as a potential...
Full-waveform inversion constrained by adaptive sonic logging data within a Bayesian framework
Available online 8 November 2025
The full waveform inversion (FWI) utilizes full wavefield data to invert subsurface parameters and is considered one of the most promising data-driven tools for obtaining high precision velocity models....
Modified Peng-Robinson equation of state for confined fluids: Critical pore size and phase behavior in shale nanopores
Available online 8 November 2025
Shale reservoirs are dominated by nanopores, where wall-fluid adsorption and anomalous fluid intermolecular interactions lead to substantial deviations from conventional equation of state (EOS) predictions....
Possible origin of deep hydrocarbons and transformation of complex petroleum systems within the Earth’s Crust
Available online 7 November 2025
We demonstrate that the conditions established in laboratory settings - such as initial reaction products, thermobaric parameters, and redox environments - are indeed analogous to those that may exist...
A novel semi-analytical model for pressure transient analysis of fault-controlled fractured-caved gas reservoirs and field applications
Available online 7 November 2025
Fractured-caved gas reservoirs are widely distributed and hold substantial reserves in northwestern China, showing considerable development potential. However, their strong heterogeneity and significant...
NMR-monitored CH4 adsorption/desorption dynamics in shale: Implications for CO2-ESGR and in-situ sequestration
Available online 6 November 2025
Addressing the inherent challenges of low recovery rates and difficulties in shale gas extraction, this study investigates the application potential of CO2-enhanced shale gas recovery (CO2-ESGR) coupled...
Formation and preservation processes of Ediacaran microbial dolomite pore system, evidence from the Qigebrak Formation, Tarim Basin, China
Available online 4 November 2025
Ancient microbial dolomite reservoirs exhibit distinct advantages in both their formation and preservation processes, making them significant hosts for hydrocarbon resources. However, the interaction...
Genesis of Late Carboniferous volcanic rocks in the Kebai Fault Zone, Western Junggar, Xinjiang: Constraints from zircon U-Pb age, whole rock geochemistry, and Sr-Nd-Pb isotopes
Available online 4 November 2025
The Late Paleozoic tectonic evolution of the Junggar Basin played a critical role in the formation of its oil and gas resources; however, as most of the basin is covered by desert, the evolutionary...
In-situ pressure-preserved coring for deep resources exploration: A novel pressure sealing subsystem and its service performance
Available online 4 November 2025
In-situ pressure coring technology is a responsible exploration technique for enhancing the efficiency and capacity of deep resources development. However, reliability issues in pressure sealing introduce...
Enhancing acrylamide-based polymer performance in high temperature drilling fluid: Role of isopentenol polyoxyethylene ether
Available online 1 November 2025
Acrylamide-based polymers have been widely applied in drilling fluids due to their excellent water solubility, structural tunability, and adaptability to various fluid systems. However, under high-temperature...
Numerical and physical simulations of acoustic imaging for adjacent well detection while drilling
Available online 1 November 2025
With increase in the number of operations involving relief wells, radial wells, U-shaped wells, and other complex well structures, challenges such as collision prevention, obstacle bypassing, and adjacent-well...
Insights into the evolution of pore structure and novel stress sensitivity determination of porosity-permeability in unconventional rocks
Available online 1 November 2025
The sensitivity of petrophysical parameters such as porosity and permeability to stress conditions is critical in unconventional reservoir management. Calculation of these dependencies on stress conditions...
Multifactor controls on imbibition oil recovery in shale: Insights from low-field nuclear magnetic resonance
Available online 1 November 2025
Shale is characterized by a complex mineral composition and a well-developed, multiscale pore network spanning from micropores to nanopores, which gives rise to a highly intricate microscopic imbibition...
Physics-informed graph neural network for predicting fluid flow in porous media
October 2025
With the rapid development of deep learning neural networks, new solutions have emerged for addressing fluid flow problems in porous media. Combining data-driven approaches with physical constraints...
Hydraulic fracturing induced casing deformation and fault activation: from single-well fracturing to well-factory fracturing
October 2025
Hydraulic fracturing-induced casing deformation and fault activation have greatly hindered the safe and efficient development of shale oil and gas resources. In this study, statistical analysis, physical...
Finite-difference simulation of elastic waves in fluid-solid coupled media with irregular interface
October 2025
The finite-difference method (FDM) is an essential tool in exploration geophysics, particularly for simulating wave propagation in fluid-solid coupled media. Despite its widespread use, FDM faces significant...
Development strategies of a gas condensate reservoir with a large gas cap, thin oil rim, strong bottom water, and natural barriers
October 2025
The development of gas condensate reservoirs with a large gas cap, thin oil rim, strong bottom water, and natural barriers faces numerous challenges, including reservoir heterogeneity, coning effects,...
Real-time NMR investigation of water infiltration mechanisms and pore structure evolution in fractured sandstone near-wellbore regions
October 2025
During the exploitation of sandstone gas reservoirs, natural fractures near the wellbore affect water infiltration and pore evolution; however, the impact mechanisms of these fractures remain unclear....
Surface erosion thickness and oxygen isotope of the Early Jurassic lake water in northern Sichuan Basin, evidence from clumped isotopes of shell limestones
October 2025
Oxygen isotope (δ18O) of paleolake water is a key indicator for reconstructing the formation temperature and diagenetic history of lacustrine carbonate minerals. In this study, we use clumped isotopes...
Structural determinants of asphaltenes behavior: Heteroatom-driven aggregation dynamics and viscosity enhancement in heavy oil systems
October 2025
Heavy oil, constituting a significant portion of global oil reserves, presents unique challenges in extraction and processing due to its high viscosity, largely influenced by asphaltenes and their heteroatom...
Synthesis kinetics of B-COPNA resin monitored by the transformation of functional groups using in-situ FTIR spectroscopy
October 2025
B-COPNA resin, synthesized from the light fraction of ethylene tar (ETLF), is a superior precursor of the carbon materials. An in-depth understanding of the COPNA resin preparation process and strict...
Experimental investigation of surfactants and their ethanol blends for CO2–oil miscibility enhancement in CO2-EOR
October 2025
As one promising CO2 capture, utilization and storage (CCUS) technology, miscible CO2-enhanced oil recovery (CO2-EOR) significantly outperforms immiscible flooding in enhancing oil production and storing...