Microscopic heterogeneity characteristics and movable oil characterization of ultra-deep shale oil in the Mahu Sag
Available online 9 May 2026
The shale oil in the Fengcheng Formation of the Mahu Sag has become an extremely critical target for large-scale reserve growth in the Junggar Basin. Characterized by great burial depth, complex geology,...
Numerical study on formation blockage and back-pumping during geothermal water reinjection in weakly consolidated heterogeneous reservoirs using a novel mechanism model
Available online 7 May 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...
Advances in Underground Gas Storage: A Review of Current Practices and Future Prospects
Available online 30 April 2026
Underground gas storage (UGS) plays a vital role in ensuring energy security and supporting the transition to a low-carbon energy future by enabling the large-scale storage of methane-rich natural gas...
Relative permeability model for shale reservoirs considering water distribution and imbibition with two fractal regions
April 2026
Shale gas is a key transitional low-carbon energy source, offering a cleaner-burning alternative to coal, reducing greenhouse gas emissions, and supporting energy security during the transition to renewable...
Pre-oxidized PAN/PVP nanofibrous membranes with enhanced mechanical robustness and chemical stability for high-flux separation of oily wastewater from petroleum production
April 2026
Discharge of oily wastewater, generated from oil and gas production can lead to severe marine and soil contamination, posing long-term threats to ecosystems and water security. Therefore, developing...
Machine learning-based surrogate correlation for prediction of wax deposition rate in oil and gas pipelines
April 2026
This study developed a data-driven surrogate-box correlation to predict wax deposition rates in crude-oil pipelines and help address the limited generalizability of empirical and mechanistic models...
Assessing the efficiency of long-term CO2 geological storage using an advanced multiphase compositional simulator
April 2026
CO2 sequestration has a critical role in mitigating climate change impacts, thus we rely on numerical simulations to capture the processes of CO2 injection, migration, and long-term storage. This paper...
Enhancing CO2 huff-n -puff strategies for improved oil recovery in the Bakken formation: A numerical simulation approach
April 2026
This study investigates the performance of various huff and puff (HnP) strategies for enhanced oil recovery (EOR) in the Sanish field of the Bakken formation, using a numerical model developed with...
Development and evaluation of graphene nanosheets as a novel micro-nano plugging agent for oil-based muds
April 2026
Although there are abundant shale gas resources in China, shale gas is generally buried much deeper than foreign countries. For large-scale development, there are still many core technologies that have...
Wellbore strengthening through rock consolidation using diammonium phosphate
April 2026
Wellbore instability in chalk formations poses significant challenges during drilling and production due to low rock strength, fluid sensitivity, and creep. This study investigates the efficacy of diammonium...
A graphene plugging material for high-temperature and high-salt water-based drilling fluids
April 2026
During the drilling process in deep oil reservoirs with high temperature and high salinity, the drilling fluid faces the risk of performance failure. Experiments have shown that the high-temperature...
Petroleum system modeling in the central part of the Fars platform (Zagros Basin)
April 2026
The Fars Platform is a geological region with significant untapped potential for petroleum resources. Its unique structural and stratigraphic features, combined with favorable reservoir conditions,...
A probabilistic comprehensive evaluation method for the fracability of unconventional hydrocarbons reservoir considering description uncertainty of target formation
April 2026
Fracability evaluation is a crucial basis for fracturing and production enhancement in tight reservoirs. Due to the complexity of the geological environment, factors influencing reservoir fracability...
Analysis of the effect of steam injection conditions on the integrity of casing-cement sheath-formation assemblies in heavy oil thermal recovery
April 2026
Accurately forecasting the sealing failure behavior of the casing-cement sheath-formation assembly under various steam injection operational parameters and cyclic steam stimulation conditions remains...
Structural evolution and reservoir-control mechanisms of ultra-deep strike–slip fault zones in the Fuman area, Tarim Basin, China
April 2026
The discovery of ultra-deep strike–slip fault–controlled hydrocarbon reservoirs in the central Tarim Basin has renewed interest in the structural evolution and reservoir-controlling mechanisms of intracratonic...
Molecular Simulation of H2, CO2 and CH4 Adsorption on Kerogen in Moisture-Rich Environments
Available online 28 April 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...
CO2 enhanced shale oil and carbon sequestration in kerogen nanopores: A molecular dynamics study
Available online 22 April 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
Available online 22 April 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
Available online 22 April 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...
A review on functional group chemistry and structure-to-function design for mechanism-centric nanoparticle EOR
Available online 7 April 2026
A significant challenge in advancing nanoparticle-based enhanced oil recovery (EOR) is the gap between synthesis and application. Many reviews catalog surface modification techniques but fail to explain...
CO2 Impact on Water-based Drilling Fluids: Excessive Thickening Characteristics and Mechanisms
Available online 13 March 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
Available online 6 March 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...
Research on the influence of silica fume on the long-term strength development of lightweight cement
February 2026
Silica fume (SF) is commonly added to lightweight cement slurry (LWCS) to enhance strength and stability due to its nanoscale properties. However, the long-term strength development of SF-modified cement...
Enhanced oil recovery in tight conglomerate reservoirs using CO2 flooding: A visual model with fractal-based zoning
February 2026
CO2 flooding has emerged as a valuable method for enhancing oil recovery (EOR) in fossil fuel reservoirs. However, the impact of micro-heterogeneity, particularly variations in pore sizes, on CO2 flooding...
Hydrocarbon generation potential evaluation of high–over mature Permian source rocks in the Southwestern part of the central depression, Junggar Basin
February 2026
A comprehensive study was conducted on the hydrocarbon generation potential of the deeply buried Permian source rocks with high–over mature in the southwestern part of the Central Depression, Junggar...
