Thermal characteristics and removal mechanism of high energy plasma jet rock-breaking
Available online 20 December 2024
High-energy plasma jet rock-breaking technology is regarded as a very promising new drilling approach for deep hard rock, attributed to its high energy density, high rock-breaking efficiency, absence...
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Comparative analysis of rock breakage characteristics and failure mode on conventional and conical PDC cutter cutting carbonate
Available online 18 December 2024
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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Experimental study of microscopic oil production and CO2 storage in low-permeable reservoirs
Available online 18 December 2024
Enhanced CO2 sequestration (ECS) within low-permeable reservoirs during CO2-enhanced oil recovery (CO2-EOR) processes has gained significant interest, primarily driven by the need to mitigate the greenhouse...
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Oilfield sustainability and management: an optimization model for the reconstruction of oil and gas gathering systems based on potential location mining
Available online 18 December 2024
The carbon emissions and cost during the construction phase are significant contributors to the oilfield lifecycle. As oilfields enter the late stage, the adaptability of facilities decreases. To achieve...
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Unraveling key factors that influence and shape fluid flow dynamics in Brazilian Salt Lagoon stromatolites: a case study in pre-salt analogues.
Available online 18 December 2024
This study analyzes Brazilian stromatolites in Lagoa Salgada, serving as analogs for pre-salt rocks in the Santos and Campos basins. Despite their excellent petrophysical properties, such as high porosity...
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Real-time drilling torque prediction ahead of the bit with just-in-time learning
Available online 15 December 2024
The digital twin, as the decision center of the automated drilling system, incorporates physical or data-driven models to predict the system response (rate of penetration, down-hole circulating pressure,...
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A novel self-rotating down-the-hole hammer with impact and rotary functions for directional drilling: Design, modeling, and experiments
Available online 14 December 2024
Pneumatic down-the-hole hammer, serving as rock-breaking tool, possesses appeal for directional drilling due to its high rate of penetration. However, corresponding experimental studies on existing...
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Numerical simulation of gas kick evolution and wellbore pressure response characteristics during the deepwater dual gradient drilling
Available online 12 December 2024
The gas kick represents a major risk in deepwater oil and gas exploration. Understanding the dynamics of gas kick evolution and the associated pressure response characteristics is critical for effective...
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Mesoporous SiO2 nanoparticles with low surface energy and multi-level roughness as shale wellbore stabilizers in oil-based drilling fluid
Available online 10 December 2024
Oil-based drilling fluids possess excellent properties such as shale inhibition, cuttings suspension, and superior lubrication, making them essential in the development of unconventional oil and gas...
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Geological-engineering comprehensive evaluation model and application of feasibility of hydraulic fracturing in hydrate-bearing sediments
Available online 10 December 2024
Natural gas hydrates (hereinafter referred to as hydrates) are a promising clean energy source. However, their current development is far from reaching commercial exploitation. Reservoir stimulation...
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Dynamic reservoir monitoring using similarity analysis of passive source time-lapse seismic images: Application to waterflooding front monitoring in Shengli Oilfield, China
Available online 10 December 2024
In common practice in the oil fields, the injection of water and gas into reservoirs is a crucial technique to increase production. The control of the waterflooding front in oil/gas exploitation is...
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Insights into the pore structure and hydrocarbon accumulation of lacustrine organic-rich shales
Available online 7 December 2024
With the development of unconventional hydrocarbon, how to improve the shale oil and gas recovery become urgent. Therefore hydraulic fracturing becomes the key due to the complicated properties of the...
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Experimental investigation on the effects of deep eutectic solvents (DES) on the wettability of sandstone samples
Available online 7 December 2024
Recently, deep eutectic solvents (DES) have received great attention in assisting water flooding and surfactant flooding to improve oil recovery because they can reduce the interfacial tension (IFT)...
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Damage mechanism analysis of polymer gel to petroleum reservoirs and development of new protective methods based on NMR technique
Available online 4 December 2024
Polymer gels are widely used in water control and enhanced oil recovery in oil fields. However, the damage mechanism of polymer gels to layers with remaining oil and not requiring plugging and corresponding...
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A robust seismic wavefield modeling method based on minimizing spatial simulation error using L2-norm cost function
Available online 4 December 2024
To reduce the spatial simulation error generated by the finite difference method, previous researchers compute the optimal finite-difference weights always by minimizing the error of spatial dispersion...
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Restoration of hydrocarbon generation potential of the highly mature Lower Cambrian Yuertusi Formation source rocks in the Tarim Basin
Available online 4 December 2024
The Early Cambrian Yuertusi Formation (Є1y) in the Tarim Basin of China deposits a continuously developed suite of organic-rich black mudstones, which constitute an important source of oil and gas reservoirs...
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Tectonics of the West and Central African strike-slip rift system
Available online 30 November 2024
It is essential to intensify research on the strike-slip tectonic system in West and Central Africa to better understand regional tectonic evolution and achieve future breakthroughs in oil and gas exploration....
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Development and evaluation of organic/metal ion double crosslinking polymer gel for anti-CO2 gas channeling in high temperature and low permeability reservoirs
Available online 27 November 2024
CO2 flooding enhanced oil recovery (CO2-EOR) represents a significant technology in the low permeability reservoir. With the fractures and heterogeneity in low permeability reservoirs, CO2-EOR is susceptible...
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Construction of a foaming agent containing hydroxysulfobetaine and α-olefin sulfonate for clastic reservoirs with high temperature and high salinity
Available online 24 November 2024
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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Experimental investigation into CO2 huff-n-puff in low-permeability heavy oil reservoirs: Role of fractures
Available online 22 November 2024
Low-permeability heavy oil reservoirs are characterized by poor flowability, generally mandating hydraulic fracturing to commence production. CO2 huff-n-puff in fractured reservoirs is an effective...
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Multi-layer risk spillover network of Chinese Energy companies under the background of carbon neutralization
Available online 21 November 2024
As global climate change and environmental challenges intensify, governments across the globe are increasingly concerned about the sustainable development of the energy industry, with the identification...
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Synergistic effect of nanoparticles and viscoelastic surfactants to improve properties of drilling fluids
Available online 21 November 2024
The conservation of rheological and filtration properties of drilling fluids is essential during drilling operations. However, high-pressure and high-temperature conditions may affect drilling fluid...
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Effect of preprocessing on performances of machine learning-based mineral composition analysis on gas hydrate sediments, Ulleung Basin, East Sea
Available online 20 November 2024
Gas hydrate (GH) is an unconventional resource estimated at 1,000−120,000 trillion m3 worldwide. Research on GH is ongoing to determine its geological and flow characteristics for commercial production....
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Sub-lacustrine debrite system: Facies architecture and sediment distribution pattern
Available online 18 November 2024
The deep-water systems in different types of sedimentary basins exhibit significant variability. Current knowledge of deep-water deposition is mainly derived from deep-marine turbidite systems. However,...
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Mg-C-O isotopes and elements reveal the origin of dolostone in the Middle Jurassic Buqu Formation
Available online 14 November 2024
The origin of dolostone in the Middle Jurassic Buqu Formation of the Plateau Basin has been a subject of prolonged debate. This study combines detailed petrological observations with analyses of Mg-C-O...
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