Transient well-test model of a slanted well in a heterogeneous multi-zonal reservoir
September 2025
To enhance the comprehension of flow characteristics and enrich the well-test theory of slanted wells, this study established a well-test model for a slanted well in a heterogeneous multi-zonal reservoir....
Cambrian-Devonian paleogeographic evolution of the western and central segments of North Africa
September 2025
This study reconstructs the lithofacies and paleogeographic evolution of North Africa during the Cambrian to Devonian periods, emphasizing the influence of tectonic events, sea-level fluctuations, and...
Enhanced understanding of carbonate-rich shale heterogeneity through multifractal characterization based on N2 adsorption data: A case study of the Permian Wujiaping Formation in the Sichuan Basin
September 2025
The carbonate-rich shale of the Permian Wujiaping Formation in Sichuan Basin exhibits significant heterogeneity in its lithology and pore structure, which directly influence its potential for shale...
Organic pore heterogeneity and its impact on absorption capacity in shale reservoirs in the Wufeng and Longmaxi formations, South China
September 2025
This study aims to determine the variation and controlling factors of shale gas adsorption capacity in reservoirs in the Upper Ordovician Wufeng Formation and the Lower Silurian Longmaxi Formation (also...
Facies and NMR-based petrophysical analyses of the Apollonia unconventional gas reservoir: A case study from the BED–9 field, Abu Gharadig Basin, North Western Desert, Egypt
September 2025
The Early Paleocene to Middle Eocene Apollonia Formation in the BED‒9 field has been particularly interesting for unconventional hydrocarbon exploration since its discovery in 2006. However, the multiscale...
Comparative investigation of the heat extraction performance of an enhanced geothermal system using H2, CO2, and H2O as working fluids
September 2025
The optimization of working fluids in single-well coaxial geothermal systems presents a critical pathway for advancing the use of enhanced geothermal systems (EGS) in renewable energy applications....
Characteristics of pore-throat structures in volatile oil reservoirs and strategies for optimal development
September 2025
The third member of Shahejie Formation (also referred to as Sha 3 Member) in Dongpu Depression, China, a volatile, low-permeability oil reservoir with complex fluid compositions, is subjected to high...
Spatiotemporal distribution patterns and exploration implications of multi-type coal-measure gases in the Daniudi gas field, Ordos Basin, China
September 2025
Coal-measure gas is a primary target with significant potential for the exploration of unconventional hydrocarbon resources. However, the spatiotemporal distribution and combination patterns of multi-type...
Evaluating poro-elastic production drive mechanisms: Quantifying the potential contribution to well-rates and risk of core handling damage inflating pore-volume compressibility measurements
September 2025
By analyzing core data from an offshore Gulf of Mexico reservoir and developing analytical solutions, it can be demonstrated that laboratory measurements on pore-volume compressibility include artifacts,...
Geomechanical parameter-driven evaluation of ultra-deep reservoirs: An integrated methodology and its application to the Kuqa Depression, Tarim Basin
September 2025
Reservoir evaluation is important in identifying oil and gas sweet spots in sedimentary basins. This also holds true in the Tarim Basin, where the ultra-deep oil and gas-bearing formations have high...
Multi-analytical assessment of shale gas potential in the West Bokaro Basin, India: A clean energy prospect
September 2025
Shale gas, a type of unconventional natural gas found within shale formations, has emerged as a significant source of energy globally. The West Bokaro Basin, part of the Damodar Valley, is known for...
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...
Diagenetic controls on reservoir quality in deep ultra-thick sandstones: a case study from the Huagang Formation, Xihu Depression, East China Sea
Available online 30 September 2025
Tight sandstone reservoirs represent a pivotal unconventional oil and gas production target. The upper section of the deeply buried Huagang Formation in the Xihu Depression is abundant in hydrocarbons...
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),...
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...
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,...
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...