Multi-inclusion stress modeling in vuggy carbonates using CT-derived digital cores and extended Eshelby solutions
Available online 15 May 2026
Carbonate reservoirs commonly contain multi-scale dissolution cavities (vugs) that introduce strong heterogeneity and perturb local stress fields. Quantifying stress redistribution in systems with numerous...
Optimization of CO2-EOR and geological sequestration in sandstone reservoirs via sensitivity analysis and metaheuristic algorithms
Available online 14 May 2026
This study develops a framework for CO2-enhanced oil recovery (EOR) and carbon sequestration in a sandstone reservoir, targeting carbon neutrality. Cumulative oil production (COP), CO2 geological sequestration...
Tight sandstone reservoir quality in the Lower Cretaceous Quantou Formation, Songliao Basin, NE China: Prospects from differential diagenesis and hydrocarbon-water-rock interactions
Available online 14 May 2026
Tight sandstones constitute important oil and gas reservoirs worldwide. However, tight sandstone reservoirs generally exhibit varying porosities and permeabilities due to the occurrence of differential...
Time-dependent wellbore failure in laminated mudrocks: Chrono-mechanical controls from laboratory creep and multi-well field evidence
Available online 13 May 2026
Delayed wellbore failure in clay-rich laminated mudrocks remains a persistent drilling problem that is commonly assessed using instantaneous stability criteria, neglecting time-dependent weakening....
Prediction of microseismic energy evolution in underground gas storage based on Variational Mode Decomposition and Deep Learning
Available online 12 May 2026
Accurately predicting the evolution of microseismic energy is of great significance for identifying the potential operational risks and ensuring safe operation of underground gas storage (UGS) facilities....
Big data analysis of waterflood performance in mature conventional oilfields in Eastern China
April 2026
Most conventional oilfields in Eastern China with waterflood operations have reached ultra-high water cut in recent decade. The high water injection demand and produced water treatment cost pose significant...
Experimental techniques for qualitative and quantitative characterization of shale oil reservoir space, minerals, and fluids
April 2026
Characterizing shale oil reservoirs encompassing pore space, mineralogy, and fluids is fundamental to effective exploration and development. Recent advances in experimental techniques have significantly...
Exploring the impact of AI technology innovation on energy intensity: The role of ICT development and renewable energy integration
April 2026
As global energy demand continues to intensify, artificial intelligence technology innovation (AITI) offers emerging possibilities for improving energy efficiency and supporting sustainable energy transitions....
Characterization of gravity-flow deposits in the Chang 7–9 oil groups in the Yanchang Formation, Ganquan County, Ordos Basin
April 2026
This study aims to address the challenges associated with the identification of the sedimentary facies of gravity-flow deposits in the 7th to 9th oil groups of the Yanchang Formation (also referred...
Mechanical responses of deep salt caverns under synchronous and asynchronous operation strategies
April 2026
In China, gas storage in deep salt caverns faces challenges due to high in situ stresses, elevated geothermal temperatures, and the presence of interbedded salt-mudstone formations. These factors lead...
Thermoelastic full-waveform inversion for joint estimation of subsurface temperature and seismic velocities in geothermal exploration
April 2026
Seismic exploration is the most precise geophysical method for investigating and forecasting subsurface resources, yet its conventional fully elastic assumption neglects temperature effects, limiting...
Evaluating calcite as a catalyst for pyrite-hydrogen reactions and hydrogen sulfide generation
April 2026
In nature, the presence of accessory minerals found in the subsurface have a potential to react with stored hydrogen in process of underground hydrogen storage. Pyrite (FeS2), the most abundant sulfide...
Multi-source hydrocarbon accumulation in the faulted and deeply depressed Tangdong area, Qikou Sag, Bohai Bay Basin
April 2026
Based on organic geochemical analysis data, this study examined the characteristics of multi-source hydrocarbon accumulation in the Tangdong area of Qikou Depression, Bohai Bay Basin. The results indicate...
Toward basin-agnostic well log imputation and anomaly detection via a pre-trained time-series foundation model
April 2026
Interpretation of subsurface storage characterization heavily depends on the quality and continuity of well log data. However, missing measurements and anomalous responses are common due to geological...
Method for determining the reasonable wellhead pressure of gas storage production wells: A case study of the Liuzhuang gas storage reservoir, China
April 2026
For the Liuzhuang gas storage reservoir with edge and bottom water, excessively high bottomhole pressure of production wells can cause edge and bottom water breakthrough, which reduces the effective...
Genesis analysis of high-temperature geothermal systems in the Western Yunnan: geochemical evidence from geothermal fluids
April 2026
The formation of high-temperature geothermal systems is widely regarded as inextricably linked to magmatic or volcanic activity, given that both magmatism and volcanism are indicative of extreme high...
Porosity and permeability prediction from petrographic point-counting data using machine learning: Applications to Rotliegendes and Buntsandstein reservoirs
April 2026
Machine learning approaches are widely used in geosciences. However, one widely available dataset in reservoir geology remains underrepresented in published works: petrographic data from classical point-counting...
Using extreme gradient boosting with Optuna hyperparameter tuning for efficient lost circulation prediction
April 2026
Lost circulation (LC) remains a significant challenge in drilling operations, leading to increased costs, non-productive time, and potential well integrity issues. This study focuses on predicting lost...
High-resolution mechanical characterization of lacustrine shale oil reservoir in China based on scratch testing
April 2026
The lacustrine shale oil reservoirs in China exhibit pronounced heterogeneity and anisotropy. Conventional approaches for characterizing shale mechanical properties—such as plug-scale mechanical testing...
Granite thermal conductivity based on mineral and chemical compositions: An evaluation based on hybrid models and implications on geothermal resource
April 2026
Rock thermal conductivity (TC) is a critical parameter in geothermal energy exploration and geological engineering, and is strongly influenced by the mineralogical and geochemical composition of rocks....
Role of Ammonium in CO2 Mineralization and Enhanced Oil Recovery
Available online 22 April 2026
This study presents an ammonium-assisted surface treatment strategy that couples CO2 mineralization with smart water (SW) injection for carbonate reservoirs, enabling simultaneous carbon utilization...
Carbon dioxide plumes, pressure space and legacy well risk for Southern North Sea CO2 storage projects
February 2026
Unsecured legacy wells pose significant risks to carbon capture and storage (CCS) as they present potential leakage pathways for stored CO2 to return to the atmosphere. In the UK, legacy wells must...
A reservoir rock wettability modifier for ultra-high temperature and high salinity environment
February 2026
During drilling process, the water phase in drilling fluids infiltrates rock fractures through capillary action. The surface wettability of dolomite is governed by multiple factors, resulting in an...
Numerical simulations of geological CO2 storage in a gas reservoir of the B depression, Pearl River Mouth Basin
February 2026
Geological CO2 storage is a promising strategy for reducing greenhouse gas emissions and has become a growing focus of research and deployment. This paper presents numerical simulations of CO2 injection...
Unconventional rare earth element archives in the energy transition era: The Cenozoic organic sediments from west coast of southern India
February 2026
Organic-rich sediments represent vital components of Earth's geochemical cycles, acting both as potential hydrocarbon and coal reservoirs and as unconventional archives for critical metals such as rare...
