Evolution of the 3D pore structure of organic-rich shale with temperature based on micro-nano CT
Available online 29 March 2025
Organic-rich shale is a significant potential source of oil and gas that requires development through in situ conversion technology. However, the evolution patterns of the internal three-dimensional...
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Evaluation of CO2 storage in fractured coal seam and the effect of coal fines
Available online 29 March 2025
Gas channeling in fractures during CO2 injection into the deep coal seam seriously reduces the CO2 storage efficiency after the development of coalbed methane. The generation and migration of coal fines...
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Shale weak cementation model and elastic modulus prediction based on nanoindentation experiment
Available online 29 March 2025
The successful development of shale oil and gas reservoirs is the biggest technological revolution in the oil and gas industry. Its key technologies are horizontal well drilling and fracturing, which...
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Diffraction classification imaging using coordinate attention enhanced DenseNet
Available online 28 March 2025
In oil and gas exploration, small-scale karst cavities and faults are important targets. The former often serve as reservoir space for carbonate reservoirs, while the latter often provide migration...
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Regulating carbonaceous mesophase structure by controlling nitrogen-containing aromatics of FCC slurry oil: Insights from MD simulations and experimental studies
Available online 28 March 2025
The influence of nitrogen-containing polycyclic aromatic hydrocarbons (NC-PAH) on the formation of carbonaceous mesophase remains enigmatic, despite extensive research on the production of carbonaceous...
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Synergistic stabilization of emulsions by microspheres and surfactants for enhanced oil recovery
Available online 28 March 2025
During oil displacement, surfactants often encounter challenges such as emulsion instability and channeling, which can compromise their efficiency. To address these issues, polymer microspheres were...
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Influence of CO2–brine–kerogen wettability on CO2 sequestration in shale: Implications from molecular dynamics simulation
Available online 28 March 2025
As the main factor influencing the flow and preservation of underground fluids, wettability has a profound impact on CO2 sequestration (CS). However, the influencing factors and internal interaction...
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A multi-scale and multi-mechanism coupled model for carbon isotope fractionation of methane during shale gas production
Available online 26 March 2025
Prediction of production decline and evaluation of the adsorbed/free gas ratio are critical for determining the lifespan and production status of shale gas wells. Traditional production prediction methods...
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Porosity prediction based on improved structural modeling deep learning method guided by petrophysical information
Available online 26 March 2025
Porosity is an important attribute for evaluating the petrophysical properties of reservoirs, and has guiding significance for the exploration and development of oil and gas. The seismic inversion is...
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Multi-objective optimization workflow for CO2 water-alternating-gas injection assisted by single-objective pre-search
Available online 26 March 2025
CO2 Water-Alternating-Gas (CO2-WAG) injection is not only a method to enhance oil recovery but also a feasible way to achieve CO2 sequestration. However, inappropriate injection strategies would prevent...
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Dynamic characteristics of anisotropic shale and rock-breaking efficiency of the axe-shaped tooth under different impact load-bedding angles
Available online 25 March 2025
Percussion drilling technology can be used to increase the rate of penetration in deep shale reservoirs, but the interaction mechanism among impact loads, drilling teeth and rock has not been sufficiently...
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Characterization and optimization of oil–gas interfacial tension during CO2/N2 injection in heavy oil reservoirs: Experimental study and regression model
Available online 25 March 2025
CO2/N2 injection in heavy oil reservoirs has been demonstrated to enhance oil recovery (EOR) and facilitate CO2 capture, utilization, and storage (CCUS). Interfacial tension (IFT) is a crucial parameter...
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Mechanisms of organic matter accumulation in marine clear water conditions: The Upper Permian Dalong Formation, Sichuan Basin, China
Available online 24 March 2025
The Late Permian to Early Triassic marked a pivotal phase in paleoenvironmental and tectonic shifts. The Kaijiang-Liangping intracratonic sag, a tectonic geomorphology formed by Emei taphrogenesis in...
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Pore network modeling of gas–water two-phase flow in deformed multi-scale fracture-porous media
Available online 24 March 2025
Two actual rocks drilled from a typical ultra-deep hydrocarbon reservoir in the Tarim Basin are selected to conduct in-situ stress-loading micro-focus CT scanning experiments. The gray images of rock...
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The characteristics and controlling factors of high-quality reservoirs of ultra-deep tight sandstone: A case study of the Dabei Gas Field, Tarim Basin, China
Available online 24 March 2025
High-quality reservoirs with sufficient physical properties of ultra-deep tight gas reservoirs in the Lower Cretaceous Bashijiqike Formation exhibit significant relationship with gas production across...
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Organic petrographic investigation for artificially matured marine shale: Insights from anhydrous pyrolysis of Upper Ordovician shale from the Baltic Basin, Lithuania
Available online 24 March 2025
The absence of humic vitrinite complicates the determination of thermal maturity in pre-Devonian sediments. Lower Paleozoic shales contain structured zooclasts, solid bitumen, and vitrinite-like materials,...
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Experimental and modeling investigation of zero net liquid flow in hilly terrain pipeline
Available online 22 March 2025
Hilly terrain pipeline is a common form of pipeline in oil and gas storage and transportation industry. Due to the hilly terrain influence, the liquid at the elbow of the gathering pipeline is easy...
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A dual-model dual-grid upscaling method for solid-based thermal-reactive-compositional flow simulations in fractured oil shale reservoirs
Available online 22 March 2025
Simulation of thermal-reactive-compositional flow processes is fundamental to the thermal recovery of ultra-heavy hydrocarbon resources, and a typical oilfield practice is the in-situ conversion process...
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Study on an improved saturation parameter method based on joint inversion of NMR and resistivity data in porous media
Available online 21 March 2025
CO2 storage capacity is significantly influenced by the saturation levels of reservoir rocks, with underground fluid saturation typically evaluated using resistivity data. The conductive pathways of...
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Study on the performance variation and failure mechanism of natural gas pipeline under the action of water failure
Available online 21 March 2025
Water-induced disasters in long-distance pipelines are prevalent geological hazards, characterized by their frequency and widespread distribution. The complexity of factors contributing to pipeline...
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A Comprehensive Fracture Characterization Method for Shale Reservoirs
Available online 21 March 2025
Opening-mode fractures play a crucial role in shale reservoirs, as they serve as flow channels and provide storage space for hydrocarbons. The shale reservoirs in the Permian Lucaogou Formation of the...
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Extracting useful information from sparsely logged wellbores for improved rock typing of heterogeneous reservoir characterization using well-log attributes, feature influence and optimization
Available online 20 March 2025
The information from sparsely logged wellbores is currently under-utilized in reservoir simulation models and their proxies using deep and machine learning (DL/ML). This is particularly problematic...
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Deblending by sparse inversion and its applications to high-productivity seismic acquisition: Case studies
Available online 20 March 2025
Deblending is a data processing procedure used to separate the source interferences of blended seismic data, which are obtained by simultaneous sources with random time delays to reduce the cost of...
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Establishing a fault sealing discrimination method to determine the optimal injection sites and injection rate for CO2 storage in complex fault-block geological bodies
Available online 20 March 2025
The long-term stability of CO2 storage represents a pivotal challenge in geological CO2 storage (CGS), particularly within deep saline aquifers characterized by complex fault-block systems. While the...
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Genesis and quantitative evaluation of deep petroleum phase diversity in the Tazhong area, Tarim Basin
Available online 18 March 2025
The reservoired petroleum fluids in the deep Ordovician carbonates in the Tazhong area, Tarim Basin, exhibit diverse and intricate geochemical properties and petroleum phases. However, the study on...
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