Long-term property evolution of silica-cement systems at different curing temperatures and mechanistic insights
October 2026
Neat Portland cement suffers severe strength retrogression at temperatures above 110 °C, and silica addition is commonly used to improve its high-temperature performance. This study investigates the...
Integrated experimental and simulation study of asphaltene precipitation during miscible-rich gas injection in heavy oil reservoirs
October 2026
Miscible hydrocarbon gas injection can lead to asphaltene precipitation by altering the fluid phase equilibrium. The present study characterizes oil samples using SARA (saturates, aromatics, resins,...
Optimized CO2 injection modeling and storage performance evaluation in the Hardeman basin
October 2026
Effective geological carbon dioxide (CO2) sequestration depends not only on injection operations but also on strategic storage site selection that ensures long-term containment and injectivity. This...
The leakage source analysis and the diffusion law of buried hydrogen pipeline
October 2026
To investigate the hydrogen leakage and diffusion behavior of buried hydrogen pipelines, this paper establishes a fluid-domain model specifically for buried pipelines and examines the effects of operating...
Gradient boosting justification for predicting flow assurance issues in the bottomhole zone of gas-condensate wells
October 2026
During the development of gas-condensate fields, companies often face flow assurance issues. They may lead to unplanned standstills of wells, damaged assets, and substantial financial losses. To help...
CO2 impact on water-based drilling fluids: Excessive thickening characteristics and mechanisms
October 2026
Persistent CO2 intrusion during drilling operations in deep carbonate formations frequently leads to excessive thickening of water-based drilling fluids, resulting in significantly increased pump pressure...
CO2 WAG and SAG machine learning data-driven models in an open-source framework – A theoretical study
October 2026
Optimizing CO2 enhanced oil recovery (CO2 EOR) requires numerous reservoir simulations, creating a computational burden that can be addressed using data driven models (DDMs). However, machine learning...
A comprehensive review on enhancing coiled tubing reach: Construction of a full-chain technology system, synergistic applications, and future perspectives
October 2026
The development of unconventional oil and gas resources increasingly relies on long horizontal wells, where coiled tubing (CT) is a key enabler for efficient intervention operations. However, as horizontal...
Sustainable cementing solution by optimizing ilmenite-based cement with tire waste for HPHT environments
October 2026
Cementing is essential for maintaining wellbore integrity, but high-pressure, high-temperature (HPHT) reservoirs can compromise the stability of conventional cement formulations. Ilmenite is commonly...
Analysis of particle transport mechanism and factors influencing sealing effect in fractured strata
October 2026
Severe fluid loss in fractured formations poses a major technical challenge in deep oil and gas drilling, significantly constraining wellbore integrity and drilling efficiency. This study establishes...
Molecular simulation of H2, CO2 and CH4 adsorption on kerogen in moisture-rich environments
October 2026
Understanding gas adsorption in organic-rich shales is critical for evaluating their role in CO2 sequestration and underground hydrogen storage. In this study, grand canonical Monte Carlo (GCMC) simulations...
A comprehensive analysis of HPHT drilling fluids: Advances in formulation, rheology, AI/ML utilisation, and industry challenges
October 2026
High-pressure and high-temperature (HPHT) drilling presents significant challenges to conventional drilling fluids due to extreme downhole environments that compromise rheology, suspension integrity,...
Synergistic Enhancement of Preformed Particle Gels by BiFeO3 Nanoparticles and Tetraallylammonium Chloride for Water Shutoff in High-Temperature Mature Reservoirs
Available online 7 October 2026
Excess water production from unwanted high-permeability channels is a major problem in mature, high-temperature oil reservoirs. To block these channels, preformed particle gel (PPG) is used, which often...
Impact of time-dependent geochemical effects on the dynamics of relative permeability: Implications for CO2 storage
Available online 3 October 2026
Accurate numerical modeling of multiphase fluid flow is essential for reliably predicting CO2 migration, trapping, and long-term containment in subsurface storage formations. While simulations typically...
Hydration-induced fracturing and permeability evolution in shale: A polycrystalline FDEM simulation considering heterogeneous mineral mosaics
Available online 30 September 2026
Hydration-induced fracturing to improve the permeability of rock matrix is a primary mechanism for enhancing stimulation effectiveness of shale reservoirs during post-fracturing shut-in. In this study,...
Diffusion and injectivity of air within fractured shale: Implications for in-situ combustion in shale oil reservoirs
Available online 29 September 2026
Recent research has demonstrated the effectiveness of air injection in enhancing shale oil development. However, the diffusion and injectivity of air within the shale with additional fractures is still...
Preparation and Evaluation of Ultra-Low Density PMMA/Graphite Composite Proppants for Supercritical CO2 Fracturing
Available online 28 September 2026
Conventional proppants used in supercritical carbon dioxide (scCO2) fracturing suffer from rapid settling and poor fracture conductivity due to the extremely low viscosity of scCO2, which severely limits...
Solid invasion and reservoir damage during drilling fluid filtration: A comparative study considering multiscale particle system
Available online 25 September 2026
To address solid particle invasion during drilling fluid filtration, conventional models cannot accurately describe the invasion process of multiscale particle system. In this study, based on deep bed...
A comparative study of estimating the oil generation window for evaluation and tracking the source rock potential by indirect methods
Available online 12 September 2026
The limited availability of rock sample-based geochemical tests presents a challenge for source rock evaluation in areas where rock data are absent, requiring interpreters to extrapolate sparse dat...
Integrated porosity estimation with uncertainty propagation for reservoir simulation models
Available online 5 September 2026
Porosity is a crucial parameter in assessing reservoir performance, as its accurate estimation in simulation models impacts reserves evaluation, production forecasting, and field development. The inherent...
Differential Accumulation Patterns of Mesozoic Hydrocarbon Reservoirs in the Northern Monocline Belt of the Kuqa Depression (Tarim Basin, NW China): Constraints from Basin Modeling and PVTx Simulation
Available online 3 September 2026
The northern monocline belt of the Kuqa Depression, Tarim Basin, is characterized by structural complexity and limited exploration, despite its considerable hydrocarbon potential. This study subdivides...
CO2 enhanced shale oil and carbon sequestration in kerogen nanopores: A molecular dynamics study
August 2026
Carbon dioxide (CO2) injection is a promising strategy for enhancing shale oil recovery while enabling geological carbon storage. In this study, non-equilibrium molecular dynamics (NEMD) simulations...
Research on the influencing factors and prediction model of sulfur particle aggregation diameter in high-sulfur gas wells
August 2026
The size of sulfur particle aggregates directly influences the critical sulfur particle carrying velocity, flow resistance, sulfur blockage thickness, corrosion rate, and scaling rate in high-sulfur...
Permeability prediction of tight sandstone reservoirs under few-shot and imbalanced conditions: A generative data enhancement and bi-directional attention fusion framework
August 2026
Permeability prediction in tight sandstone reservoirs is strongly influenced by diagenesis, multiscale pore structures and multiphase flow effects, resulting in pronounced spatial heterogeneity. Traditional...
Numerical study on formation blockage and back-pumping during geothermal water reinjection in weakly consolidated heterogeneous reservoirs using a novel mechanism model
August 2026
For the utilization of low-medium temperature geothermal water, the well injection capacity for tail water disposal is often reduced due to the migration of self-generated particles and the invasion...
