Hydrothermal carbon nanospheres as environmentally friendly, sustainable and versatile additives for water-based drilling fluids
Available online 18 March 2025
In this study, hydrothermal carbon nanospheres (HCNs) were prepared by hydrothermal carbonization using glucose as the precursor, and introduced to improve the properties of water-based drilling fluid...
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Paleo-fluid evolution in the Lower-Middle Ordovician carbonate reservoirs of the Shunbei area, Tarim Basin
Available online 17 March 2025
Deep carbonate reservoirs affected by prominent strike-slip faults represent crucial targets in oil and gas exploration owing to their immense resource potential. However, the complex geological environments...
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The fractal characteristics of the pore throat structure of tight sandstone and its influence on oil content: A case study of the Chang 7 Member of the Ordos Basin, China
Available online 15 March 2025
Tight oil is the most viable target for unconventional oil and gas exploration, but the complexity of micro-/nanopore throat systems significantly affects the oil content of reservoirs. To investigate...
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The Influence mechanism of liquid sedimentary layers in urban underground spaces on the characteristics of natural gas explosions and damage risk
Available online 14 March 2025
Gas explosions are a frequent hazard in underground confined spaces in the process of urban development. Liquid sedimentary layers, commonly present in these environments, have not been sufficiently...
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Numerical investigation on 2-D NMR response mechanisms and the frequency conversion of petrophysical parameters in shale oil reservoirs
Available online 14 March 2025
Characterizing the petrophysical properties holds significant importance in shale oil reservoirs. Two-dimensional (2-D) nuclear magnetic resonance (NMR), a nondestructive and noninvasive technique,...
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Differential adsorption characteristics in the composite model of deep marine shale: Implication from molecular dynamics simulations
Available online 14 March 2025
Shale gas serves as a significant strategic successor resource for future oil and gas reserves and production in China. Thus, a profound understanding of the adsorption mechanism of shale gas in shale...
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Numerical simulation of vortex-induced vibration of deepwater drilling riser based on discrete vortex method
Available online 12 March 2025
Deepwater drilling riser is the key equipment connecting the subsea wellhead and floating drilling platform. Due to complex marine environment, vortex-induced vibration (VIV) will be generated on riser,...
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A novel logging method for detecting highly resistive formations in oil-based mud using high-frequency electrodes
Available online 12 March 2025
The oil-based mud (OBM) borehole measurement environment presents significant limitations on the application of existing electrical logging instruments in high-resistance formations. In this paper,...
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Advanced development of chemical inhibitors in water-based drilling fluids to improve shale stability: A review
Available online 12 March 2025
Wellbore instability is a critical challenge in drilling operations, especially in shale formations where interaction with water-based drilling fluids can result in significant operational risks and...
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Evolution of multi-cluster fracturing in high-density layered shale considering the effect of injection scheme
Available online 11 March 2025
Shale oil reservoir is generally characterized by well-developed bedding planes, and multi-cluster fracturing is the most effective technique to achieve stable shale oil production. In this paper, a...
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Optimization of plunger lift working systems using reinforcement learning for coupled wellbore/reservoir
Available online 10 March 2025
In the mid-to-late stages of gas reservoir development, liquid loading in gas wells becomes a common challenge. Plunger lift, as an intermittent production technique, is widely used for deliquification...
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Characteristics, controlling factors and mechanisms of natural fractures formation in lacustrine shale oil reservoirs: the Chang 7 Member in Ordos Basin, China
Available online 7 March 2025
Lacustrine shale oil reservoirs of the Upper Triassic Chang 7 Member in the Ordos Basin have demonstrated significant potential for hydrocarbon resources. Natural fractures play a crucial role in hydrocarbon...
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Response characteristics of shear waves scattered by fractures with borehole observation system
Available online 7 March 2025
Fractures play a crucial role in various fields such as hydrocarbon exploration, groundwater resources management, and earthquake research. The determination of fracture location and the estimation...
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Sequence stratigraphy and sedimentary evolution from Late Cretaceous to Quaternary in the Romney 3D seismic area, deep-water Taranaki Basin (New Zealand)
Available online 7 March 2025
The study of sequence stratigraphy often focuses on shallow marine and shelf-edge regions, while research on deep-sea stratigraphic sequences remains relatively weak. This study, based on high-resolution...
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An EDCC-EMD analysis-based network for DAS VSP data denoising in frequency domain
Available online 6 March 2025
Distributed acoustic sensing (DAS) has rapidly emerged as a transformative technology in seismic exploration, particularly in vertical seismic profiles (VSP). However, the acquired VSP data suffer from...
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DLVO-based estimates of critical water saturation of shale: a case study of the lower Silurian Longmaxi shale in Sichuan Basin
Available online 6 March 2025
Shale gas is an important unconventional resource, and shale reservoirs typically contain both water and gas fluids. Water can occupy the shale gas storage space, reduce the flow capacity of shale gas,...
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A novel drilling parameter optimization method based on big data of drilling
Available online 4 March 2025
Rate of penetration (ROP) is the key factor affecting the drilling cycle and cost, and it directly reflects the drilling efficiency. With the increasingly complex field data, the original drilling parameter...
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Molecular Dynamics insights into Wax Formation—How polymeric inhibitors Shape Crude Oil Flow
Available online 4 March 2025
Molecular-level interactions between polymeric inhibitors and wax crystals are essential for mitigating wax deposition in crude oils, a major operational and environmental challenge. This study investigates...
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Changes in shale microstructure and fluid flow under high temperature: Experimental analysis and fluid–structure interaction simulation
Available online 1 March 2025
Oil shale is characterized by a dense structure, low proportion of pores and fissures, and low permeability. Pore-fracture systems serve as crucial channels for shale oil migration, directly influencing...
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February 2025
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Comparative analysis of rock breakage characteristics and failure mode on conventional and conical PDC cutter cutting carbonate
February 2025
The oil and gas stored in deep and ultra-deep carbonate reservoirs is the focus of future exploration and development. Conical PDC (Polycrystalline Diamond Compact) cutter, which is a new kind of PDC...
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Feasibility study of a process for the reduction of sulfur oxides in flue gas of fluid catalytic cracking unit using the riser reactor
February 2025
In this work, a new process for achieving the recovery of elemental sulfur by utilizing a fluidized catalytic cracking (FCC) riser reactor for SOx treatment (FCC-DeSOx) is proposed. The process leverages...
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Molecular transformation of heavy oil during slurry phase hydrocracking process: Influences of operational conditions
February 2025
The influences of reaction temperature, duration, pressure, and catalyst concentration on the molecular transformation of residual slurry phase hydrocracking process were investigated. The molecular...
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Pore formation and evolution mechanisms during hydrocarbon generation in organic-rich marl
February 2025
Marine organic-rich marl is not only a high-quality hydrocarbon source of conventional oil and gas, but also a new type and field of unconventional oil and gas exploration. An understanding of its pore...
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Construction of a foaming agent containing hydroxysulfobetaine and α-olefin sulfonate for clastic reservoirs with high temperature and high salinity
February 2025
High-temperature and high-salt reservoirs are often accompanied by serious gas channeling in gas flooding, which will greatly affect the effect of gas injection development, so in-situ foaming of temperature-resistant...
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