Impact of hysteresis of relative phase permeabilities in 3D modeling of cyclic waterflooding in a carbonate reservoir
June 2026
The main task when extracting oil from waterflooded reservoirs during late development stages is enhancing the mobility of the remaining reserves. In the context of declining oil export prices, the...
Carbon sequestration efficiency of urban mangroves: The role of native vs. introduced species
June 2026
This study evaluates species-specific differences in aboveground carbon sequestration among native and introduced tree species in an urban mangrove ecosystem of Guayaquil, Ecuador. Field measurements...
Geothermal energy for enhanced heavy oil recovery: Reducing costs and emissions
June 2026
Geothermal energy offers a promising alternative for enhanced heavy oil recovery, reducing operational costs and environmental impact compared to conventional thermal methods, such as steam injection...
Enhancing CO2 huff-n-puff recovery in tight sandstone via hybrid nanofluid wettability alteration and fracturing
June 2026
Tight sandstone reservoirs are constrained by low permeability and oil-wet surfaces, limiting the efficiency of enhanced oil recovery (EOR) by CO2 huff-n-puff. This study investigates a hybrid nanofluid...
Micropore structure characteristics and gas-bearing properties of deep coal reservoirs: A case study of the Benxi Formation in the Daning–Jixian Block
Available online 21 May 2026
Micropores in deep coal reservoirs are the primary sites for the adsorption and storage of coalbed methane (CBM). Understanding these micropores, particularly characterizing their development, is therefore...
Natural fracture subsystem division and evaluation method: Integrating characteristics into structures
Available online 20 May 2026
Foreland thrust belts are frequently characterized by complex structures, where multi-phase tectonic activity produces intricate deformation features and highly heterogeneous natural fracture systems....
Geothermal distribution characteristics and geological controlling factors in typical coal mining areas
Available online 20 May 2026
As a leading coal-producing nation, China has strategically chosen to extract deep coal resources to ensure energy security. As mining depths increase, the release of thermal energy has become more...
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...
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...
