Tight sandstone reservoir quality in the Lower Cretaceous Quantou Formation, Songliao Basin, NE China: Prospects from differential diagenesis and hydrocarbon-water-rock interactions
August 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...
Multi-inclusion stress modeling in vuggy carbonates using CT-derived digital cores and extended Eshelby solutions
August 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...
Pore-scale numerical simulation of CO2-water alternating gas injection for enhanced oil recovery in heterogeneous porous media
August 2026
To address the problem of low oil recovery efficiency during CO2 flooding in low-permeability and heterogeneous reservoirs, a two-dimensional microscale numerical model for the three-phase flow of oil,...
Mechanistic constraints on hydrogen-induced pyrite reduction
Available online 4 July 2026
Malik et al. (2026) investigated hydrogen-induced pyrite reduction and associated H2S generation under hydrothermal conditions relevant to underground hydrogen storage (UHS). They report measurable...
Dynamic monitoring and effectiveness evaluation of mid-deep coalbed methane hydraulic fracturing via the wide-field electromagnetic method
Available online 3 July 2026
To address the limited understanding of hydraulic fracture propagation and the challenges in quantitatively evaluating stimulation performance in heterogeneous mid-deep coalbed methane (CBM) reservoirs,...
Pore-throat structure and its controls on reservoir properties and oil charging threshold of shale reservoirs in Lucaogou Formation of Jimsar Sag, Junggar Basin, China
Available online 2 July 2026
To clarify the pore-throat structure characteristics, their correlation with reservoir physical properties, and the oil charging thresholds of continental shale oil reservoirs, this study focuses on...
A decoupled elastic wave equation for CO2 monitoring and its numerical simulation
June 2026
Monitoring the migration and potential leakage of carbon dioxide (CO2) is a critical part of carbon capture and storage (CCS). The most widely used monitoring technique is 4D seismic imaging, which...
Rock damage and fault reactivation mechanisms under initial perturbation in enhanced geothermal systems
June 2026
This study elucidates injection-induced fault reactivation mechanisms in Enhanced Geothermal Systems through integrated thermo-hydro-mechanical-damage (THMD) numerical modeling of China's Huangshadong...
Aliphatic hydrocarbon distribution as fingerprint for reconstructing the paleoenvironment of the Miocene coal from Muara Teweh Mine, Warukin Formation, Barito Basin, Kalimantan
June 2026
Low-to medium-rank coal reservoirs are considered to have the potential to store biogenic gas reserves and can be processed through downstream thermochemical gasification to produce synthetic gas. To...
CO2 flooding technology for enhanced oil recovery in tight oil reservoirs: A review
June 2026
Tight oil is recognized as an important unconventional hydrocarbon resource. However, the exploitation of tight oil reservoirs faces serious challenges due to their low porosity and permeability, and...
Formation mechanisms and play fairway prediction of deep tight-sand reservoirs: A case study of the Yingcheng Formation in the Fulongquan fault depression, Songliao Basin
June 2026
As hydrocarbon exploration in the Songliao Basin progressively shifts from conventional to unconventional targets and from shallow to deep horizons, substantial breakthroughs and significant advancements...
The thermal role of granitic bodies in geothermal system: Insights from South China
June 2026
Granite is widely recognized for their elevated radioactive heat generation and relatively high thermal conductivity, making it an important contributor to the thermal structure of geothermal systems....
Optimization of CO2 flooding in tight oil based on improved machine learning
June 2026
This study develops an innovative methodology for CO2 flooding optimization in tight oil reservoirs through a novel hybrid analytical framework that effectively combines Grey Relational Analysis (GRA),...
Development and application of a hybrid PDC bit for drilling the high temperature granite formation in the deep geothermal exploration well Fushenre-1
June 2026
Geothermal energy is a clean and renewable energy with significant potential. During the drilling process of geothermal development, conventional drill bits often suffer from significant wear and severe...
Full scale pore throat characterization incorporating a dynamic shape factor and permeability prediction in tight rocks
June 2026
Tight reservoirs represent a significant component of unconventional resources, yet their development is challenged by multiscale and highly heterogeneous pore-throat systems that govern fluid flow....
Genetic model of intraplate volcanic high-temperature geothermal system in Yanggao-Tianzhen Basin, Datong
June 2026
The Yanggao-Tianzhen Basin comprises three stratigraphic sequences from top to bottom, namely the Quaternary, Neogene-Paleogene, and Archean. The Quaternary serves as the regional caprock, and heat...
Architecture and formation of mouth bars in a shoal-water delta: a case study from the Zhahaquan oilfield, Qaidam basin, China
June 2026
Distinguishing between shoal-water deltas and shore-shallow lake beach-bars is challenging, creating a widespread problem for bar-scale reservoir architecture analysis and ultimately affecting oilfield...
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...
Coupled multiphysics mechanisms, impurity effects, and operational insights for CO2 storage in depleted gas reservoirs
Available online 17 June 2026
Depleted gas reservoirs offer promising options for large-scale CO2 sequestration due to their pre-existing pore networks, low formation pressure at the start of injection, demonstrated caprock integrity,...
Geothermal frontiers: Scaling subsurface solutions for urban resilience and global energy security
Available online 12 June 2026
Geothermal energy presents a unique opportunity to address the global energy trilemma of security, sustainability, and affordability while supporting resilient infrastructure and urban development....
Machine-learning prediction of flow partitioning, bottom-hole pressure, and fracture-tip pressure in horizontal water injectors with a single transverse fracture
Available online 9 June 2026
Machine learning (ML) has advanced reservoir engineering by enabling data-driven optimization for improved injection performance and cost efficiency. This study develops three supervised ML regression...
High-resolution T-R sequence architecture and sedimentary filling evolution of the Silurian Hanjiadian Formation, Sichuan Basin, southwest China
Available online 6 June 2026
The Middle Silurian Hanjiadian Formation is a promising exploration target for hydrocarbon resources in the Sichuan Basin. Historically, research on this formation remains limited, leading to a poor...
