Experimental assessment of enhanced geothermal system potential of partially abandoned or dry oil wells in a sedimentary basin
September 2025
An enhanced geothermal system (EGS) represents a promising approach to sustainable energy generation by harnessing subsurface heat from deep geological formations with low natural permeability. Sedimentary...
A comprehensive review of CO2 subsurface storage: Integrity, safety, and economic viability
September 2025
Anthropogenic emissions reached 37.4 Gt/a in 2023, intensifying the need for effective carbon storage in subsurface formations to mitigate global warming. Carbon Capture and Storage (CCS) has emerged...
Sequence stratigraphic and sedimentary evolution of the Cambrian Xiannüdong Formation in the north central Sichuan Basin, SW China
September 2025
The high-frequency cycles seen in the carbonates of the Cambrian Xiannüdong Formation in the Sichuan Basin commonly exhibit a certain coupling relationship with the development of grain shoals; this...
Formation and evolution of thiadiamondoids in petroleum: Evidence from thermochemical sulfate reduction simulation experiments with 1,3-dimethyladamantane
September 2025
Thiadiamondoids (TDs) have recently attracted increasing attention as molecular proxies for thermochemical sulfate reduction (TSR) reactions in reservoirs. However, their formation mechanisms, as well...
Cases of possible structural-stratigraphic accumulations in the Oriente Basin, analysis on their accumulation mechanisms and implication for future exploration
September 2025
Three cases of structural-stratigraphic accumulations in the foredeep zone of the Oriente Basin have been analyzed. The target reservoirs are U and M1 sections of Napo Fm. in the Basin. Seismic amplitude...
Characterizing stratigraphically complex deepwater slope channel reservoirs for production optimization and better field management – A brown field example, offshore West Africa
September 2025
The dynamic relationship between field management and reservoir characterization has often been a puzzle, especially in complex deepwater channel systems. Reservoir management and infill drilling success...
Delineation of depth to basement and subsurface structures beneath the Gerad Graben, Western Sirt Basin, Libya, from gravity and aeromagnetic data
Available online 16 September 2025
This study integrates gravity and aeromagnetic datasets to delineate basement depth and characterise the subsurface structural framework of the Gerad Graben in the western Sirt Basin, Libya. Techniques...
Development and application of a hybrid PDC bit for drilling the high temperature granite formation in the deep geothermal exploration well Fushenre-1
Available online 10 September 2025
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...
Granite thermal conductivity based on mineral and chemical compositions: An evaluation based on hybrid models and implications on geothermal resource
Available online 30 August 2025
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....
Multi-source and multi-attribute collaborative fracture network modeling of a sandstone reservoir in Ordos Basin
Available online 20 August 2025
The effective channeling of fluid flow by fractures is a liability for enhanced oil recovery (EOR) methods like CO2 flooding or CO2 storage. Developing a distributed fracture model to understand the...
Assessment of carbon dioxide storage in the Gulf of Gabes, Tunisia: Analytical and numerical modeling
Available online 8 August 2025
Significant hydrocarbon accumulations in the offshore Gulf of Gabes, Tunisia, remain largely undeveloped due to elevated concentrations of carbon dioxide (CO2), nitrogen (N2), and hydrogen sulfide (H2S),...
Quantitative recognition and petroleum geological significance of interlayers in coastal sandstone reservoirs: A case study from the Donghe Sandstone in the Hade Oilfield, Tarim Basin, NW China
Available online 10 July 2025
Buried coastal sandstones would be of high-quality hydrocarbon reservoirs. Controlled by deposition and diagenesis, coastal sandstones mixed with muddy and calcareous materials are usually low in porosity...
Characteristics of carbon emission point sources and industry analysis in the Guangdong-Hong Kong-Macau Greater Bay Area
Available online 8 July 2025
Carbon Capture, Utilization, and Storage (CCUS) technology has gained widespread attention in recent years as a critical strategy to combat global climate change, particularly in achieving carbon neutrality...
Traffic light system regulation of induced seismicity under multi-well fluid injection
June 2025
The occurrence time and magnitude of injection-induced seismicity are influenced by engineering factors, such as wellhead pressure, injection location, injection volume, and injection rate. Understanding...
Hydrothermal activity and its influence on hydrocarbon accumulation in deep dolomite reservoirs of the Ediacaran Dengying Formation, Sichuan Basin
June 2025
There are abundant hydrothermal events within the Dengying Formation dolomite of the Precambrian system in southwest China. Methods including petrography identification, fluid-inclusion observation,...
Seismic and petrophysical data analysis for geological interpretation and subsurface modeling of Keva Field, onshore Niger Delta, Nigeria
June 2025
This study integrates seismic and petrophysical data to evaluate the subsurface geology of the Keva Field, located onshore in the Niger Delta, with the objective of constructing a 3D geological model...
Determining CO₂ front in CO₂-EOR using a well-testing method
June 2025
CO2 flooding is a widely recognized method for enhanced oil recovery (EOR). This study aims to develop an accurate prediction method for determining the location and migration pathway of CO2 front,...
Quantitative characterization of permeability heterogeneity of tight-sand reservoirs using nano-CT technology: A case study of the Yanchang Formation, Ordos Basin
June 2025
The physical properties of hydrocarbon reservoirs are important factors affecting the percolation ability of the reservoirs. Tight-sand reservoirs exhibit complex pore throat connectivity due to the...
Gas geochemistry evaluation of onshore Colombian basins: New insights for natural gas and liquified petroleum gas prospectivity
June 2025
This study examines the molecular and isotopic composition of 193 gas samples collected from oil and gas fields across Colombia's onshore basins with active hydrocarbon production. Comparative analyses...
A model for predicting marine shale gas sweet spots based on relative sea-level changes and its application
June 2025
Gas-bearing shales have become a major source of future natural gas production worldwide. It has become increasingly urgent to develop a reliable prediction model and corresponding workflow for identifying...
Integrating geographic information system and 3D virtual reality for optimized modeling of large-scale photovoltaic wind hybrid system: A case study in Dakhla City, Morocco
June 2025
This research pioneers the integration of geographic information systems (GIS) and 3D modeling within a virtual reality (VR) framework to assess the viability and planning of a 20 MW hybrid wind-solar-photovoltaic...
Hybrid CO2 thermal system for post-steam heavy oil recovery: Insights from microscopic visualization experiments and molecular dynamics simulations
June 2025
The hybrid CO2 thermal technique has achieved considerable success globally in extracting residual heavy oil from reserves following a long-term steam stimulation process. Using microscopic visualization...
Application of iso-frequency extractions and spectral frequency blending in hydrocarbon delineation of thin-pay and thick-pay reservoirs, Niger Delta Basin
June 2025
Delineation of hydrocarbon-bearing sands and the extent of accumulation using seismic data is a reoccurring challenge for many fields. This study addressed the existing challenges of delineating a known...
A comprehensive review of factors affecting wellbore integrity in CO2 injection wells
June 2025
The preservation of the integrity of CO2 injection wells holds immense significance for the efficacy of Carbon Capture and Storage (CCS) projects. This is attributable to the fact that a wellbore exhibiting...
A data-driven PCA-RF-VIM method to identify key factors driving post-fracturing gas production of tight reservoirs
June 2025
Hydraulic fracturing technology has achieved remarkable results in improving the production of tight gas reservoirs, but its effectiveness is under the joint action of multiple factors of complexity....
