A novel unstructured-grid generator using upscaling applied to a compositional reservoir simulator
Available online 19 February 2026
This work introduces a novel unstructured grid generator using an upscaling technique and the Element-based Finite Volume Method (EbFVM). The proposed grid generator can either replicate the original...
Investigation of hydrate inhibitor tracking in oil-gas-water multiphase flow pipelines
Available online 18 February 2026
As oil and gas exploration progressively moves into deepwater regions, flow assurance in multiphase transport pipelines has become a critical issue. The complex conditions in deepwater environments...
A systematic two-stage optimization framework for congestion locating and multi-component expansion planning in natural gas pipeline networks
Available online 17 February 2026
As global energy demand continues to rise, natural gas pipeline systems face significant challenges, including congestion during peak demand periods and the complexities of system expansion. This paper...
Green-synthesized zinc quantum dots from Parsley leaves for enhanced oil recovery: Improving IFT, wettability, and oil recovery performance
Available online 17 February 2026
Nanotechnology has attracted significant attention in recent decades due to its diverse applications, particularly in chemical enhanced oil recovery (cEOR). By reducing fluid–fluid interfacial tension...
An anisotropy-dynamic ant colony optimization with probabilistic fracture uncertainty quantification for sub-seismic fault detection
Available online 17 February 2026
The precise characterization of subsurface fracture systems, especially sub-seismic fractures below seismic resolution, is critical for developing complex hydrocarbon reservoirs. While ant colony optimization...
Reinterpretation of volcanic and hydrothermal influence on organic matter accumulation and paleo-depositional environment in a lacustrine shale system: Insight from interpretable machine learning model
Available online 16 February 2026
The significant resource potential of lacustrine shale oil has spurred interest in understanding organic matter enrichment mechanisms. However, conventional analytical methods are often constrained...
Beyond spatial averaging: Modeling DAS seismic responses with optical system effects
Available online 14 February 2026
Distributed acoustic sensing (DAS) utilizes standard optical fibers as continuous distributed seismic sensors, enabling the acquisition of subsurface vibration information with high spatial sampling...
Adaptive structure-guided impedance inversion using implicit sparse constraint
Available online 13 February 2026
Structure-guided inversion has been increasingly adopted to enhance structural features and improve the interpretability of seismic impedance imaging. However, the limited bandwidth of seismic wavelets...
Feasibility of underground gas storage construction from large-scale low-permeability lithologic gas reservoirs: Insights into microscopic storage spaces
Available online 13 February 2026
The construction of underground gas storage (UGS) in a large-scale low-permeability lithologic gas reservoir presents an immense engineering challenge. Under the context of UGS, research on structural...
Molecular insights into the effects of representative organic molecules on spontaneous hydrate nucleation in oceanic sediments
Available online 13 February 2026
Knowledge of the effect of different organic molecules on spontaneous hydrate nucleation is crucial for understanding the formation of gas hydrates in marine reservoirs. Herein, microsecond MD simulations...
In-situ combustion of heavy oil within a vuggy carbonate reservoir: Part II—Mechanism of permeability inversion and rock fabric transformation
Available online 11 February 2026
Predicting the performance of in-situ combustion (ISC) in carbonate reservoirs is notoriously challenging. This study reveals a paradoxical permeability inversion phenomenon: initially high-permeability...
Multi-spherical interactions driving the generation, accumulation and distribution of natural gases and CO2 resources in the Changling Fault Depression, Songliao Basin, China
Available online 11 February 2026
This study systematically investigates the genesis, migration, accumulation, and distribution patterns of natural gas and CO2 in the Changling Fault Depression of the Songliao Basin through an interdisciplinary...
A facies-constrained flow-network model for fast history matching and production optimization of polymer flooding reservoirs
Available online 9 February 2026
With the rising water cut in mature oil fields, polymer flooding has emerged as a critical Enhanced Oil Recovery (EOR) technique. However, high-fidelity numerical simulations for history matching and...
Multiparameter Bayesian full-waveform inversion with uncertainty quantification based on regularized inverse scattering theory for elastic transversely isotropic media
Available online 9 February 2026
Complex subsurface structures exhibit significant anisotropic characteristics, making multi-parameter imaging techniques important for achieving a more comprehensive geological interpretation. Full-waveform...
A data augmentation method for lacustrine shale lithofacies classification based on a conditional diffusion probabilistic model: A case study from the Dongying Depression, Bohai Bay Basin, China
Available online 7 February 2026
Accurate identification of lithofacies is critical for shale hydrocarbon exploration and development. Although machine learning (ML) is one of the most effective approaches for predicting shale lithofacies,...
Digital twin driven ram BOP shear capability analysis
Available online 6 February 2026
As a critical component of the oil drilling control system, blowout preventers (BOPs) shear failure accidents can occur in case of blowout incidents. Existing methods based on simulation and empirical...
Techno-economic co-optimization of CO2 enhanced oil recovery strategies in a tight oil reservoir using coupled improved evolutionary algorithm and machine learning framework
Available online 6 February 2026
Massive carbon dioxide (CO2) emissions drive climate change. Injecting CO2 into unconventional reservoirs achieves both enhanced oil recovery (EOR) and geological sequestration. However, simultaneously...
Hydraulic-mechanical analysis of induced stress change in unconventional reservoirs using a novel fundamental solution of poromechanics in a half space
Available online 6 February 2026
The production of fractured unconventional reservoirs induces stress changes, which will affect the production performance of neighboring wells. To quantify such effects, the analytical solution is...
Full waveform inversion via BEEMD-based gradient decomposition
Available online 6 February 2026
Full waveform inversion (FWI) gradient inherently contains both tomographic and migration components, which are responsible for updating large-scale background velocity and small-scale structural details,...
Gas-solid two-phase flow erosion of needle throttle valve in shale gas field based on CFD-DEM model
Available online 5 February 2026
Needle throttle valve (NTV) is a key equipment to ensure the safe production of shale gas fields, but it is often seriously eroded by the solid particles in the produced gas. At this work, the CFD-DEM...
Stress characteristics and sealing mechanism of steel-titanium heterogeneous drill pipe joints
Available online 5 February 2026
Titanium alloy drill pipes exhibit promising potential for ultra-deep well drilling due to their high specific strength and superior corrosion resistance. However, the engagement surfaces of the pin...
Numerical investigation of the effect of reactive transport in rock matrix on fracture fluid flow and heat transfer behavior in enhanced geothermal systems
Available online 3 February 2026
Quantitatively understanding reactive transport in matrix-fracture systems and the corresponding effect on reservoir fluid flow and heat transfer behavior is essential for the prediction of long-term...
Research on the intelligent characterization of interwell section architecture based on Bayesian expert systems
Available online 3 February 2026
The characterization of interwell section architecture is critical for revealing reservoir lateral heterogeneity and connectivity. This process integrates well and seismic data with geological knowledge...
Development of mahua oil (Madhuca indica) methyl ester based drilling mud as a sustainable alternative to oil based mud for unconventional reservoirs
January 2026
The exploration of untapped unconventional reservoirs has increased to fulfill the growing global demand for energy. Traditionally, oil-based mud (OBM) is preferred for drilling such formations; however,...
Simulation analysis of hydraulic fracture initiation and propagation mechanisms under mixed-mode and reservoir fracturing
January 2026
With the increasing demand for the development of unconventional oil and gas resources, hydraulic fracturing has become a key technology for enhancing reservoir permeability. However, achieving controlled...