A dual-scale failure evaluation method for Carbon-glass hybrid Fiber sucker rod and their joints under complex loads
Available online 22 April 2025
A hybrid fiber-reinforced polymer (HFRP) continuous sucker rod, comprising a carbon fiber-reinforced polymer (CFRP) core layer, a glass fiber-reinforced polymer (GFRP) winding layer, and a GFRP coating...
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A large-scale, high-quality dataset for lithology identification:Construction and applications
Available online 21 April 2025
Lithology identification is a critical aspect of geoenergy exploration, including geothermal energy development, gas hydrate extraction, and gas storage. In recent years, artificial intelligence techniques...
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The genesis and accumulation mechanism of CBM in the typical mid- to low-rank coal-bearing basins
Available online 17 April 2025
The composition and isotopic characteristics of coalbed methane (CBM), as well as the genesis of CH4 and CO2, associated geological process and migration-accumulation model of CBM in typical mid- to...
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Experimental investigation on cross-layer propagation of hydraulic fractures in shale-sandstone interbedded reservoirs
Available online 17 April 2025
China's shale oil and gas resources are widely distributed in shale-sandstone interbedded reservoirs, whose complex lithology and strong heterogeneity pose significant challenges to hydraulic fracturing...
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A novel method for predicting formation pore pressure ahead of the drill bit by embedding petrophysical theory into machine learning based on seismic and logging-while-drilling data
Available online 17 April 2025
Formation pore pressure is the foundation of well plan, and it is related to the safety and efficiency of drilling operations in oil and gas development. However, the traditional method for predicting...
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Effects of multiphase transport in multiscale pore network on carbon storage and enhanced shale oil recovery: An experimental and numerical study
Available online 16 April 2025
CO2 injection in shale oil reservoirs has emerged as a promising technique for simultaneously achieving CO2 geological storage and enhancing shale oil recovery. This study investigates the potential...
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Pressure characterization study in the jet influence zone of riser based on HHT analysis
Available online 16 April 2025
By large-scale cold mold experiments, pressure pulsation signals within the jet influence zone of riser reactor are processed by using Hilbert-Huang analysis (HHT) in this study. Effects of different...
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In-situ temperature-pressure preserved coring for onshore deep oil and gas exploration: research on the design principles and mechanical properties of the temperature-preserved core chamber
Available online 11 April 2025
A novel temperature-preserved core chamber designed for depths exceeding 5000 m has been developed to enhance the scientific understanding of deep oil and gas reservoirs. This temperature-preserved...
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Systematic Modeling and Methodological Approaches for Optimizing Gas Storage Facility Design with Fluctuating Hydraulic Characteristics
Available online 11 April 2025
As the proportion of natural gas consumption in the energy market gradually increases, optimizing the design of gas storage surface system (GSSS) has become a current research focus. Existing studies...
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Multichannel seismic resolution enhancement via spectral fitting for thin reservoir characterization
Available online 11 April 2025
As seismic signals propagate underground, the subsurface media absorb high–frequency components, decreasing seismic resolution and limiting the identification and characterization of thin reservoirs....
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The flow field characteristics and rock breaking ability of cone-straight abrasive jet, rotary abrasive jet, and straight-rotating mixed abrasive jet
Available online 11 April 2025
Radial jet drilling technology (RJD) is expected to be a technology for the efficient exploitation of geothermal resources. However, the low rock-breaking efficiency is the major obstacle hindering...
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Natural fractures and their effectiveness in deep tight sandstone reservoirs of foreland thrust belts in the southern Junggar Basin, China
Available online 11 April 2025
Strong tectonic activities and diagenetic evolution encourage the development of natural fractures as typical features in deep tight sandstone reservoirs of foreland thrust belts. This study focused...
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Efficient numerical modeling scheme for solving fractional viscoacoustic wave equation in TTI media and its application in reverse time migration
Available online 10 April 2025
Amplitude dissipation and phase dispersion occur when seismic waves propagate in attenuated anisotropic media, affecting the quality of migration imaging. To compensate and correct for these effects,...
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Hybrid deep learning framework with spatiotemporal pattern extraction for decant oil solid content soft sensor development in Fluid Catalytic Cracking Units
Available online 4 April 2025
Coking at the fractionating tower bottom and the decant oil circulation system disrupts the heat balance, leading to unplanned shutdown and destroying the long period stable operation of the Fluid Catalytic...
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A new method for the rate of penetration prediction and control based on signal decomposition and causal inference
Available online 4 April 2025
Offshore drilling costs are high, and the downhole environment is even more complex. Improving the Rate of Penetration (ROP) can effectively shorten offshore drilling cycles and improve economic benefits....
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Research on small molecule wetting agent for drilling fluids applied in Antarctic drilling engineering
Available online 3 April 2025
Antarctica contains numerous scientific mysteries, and the Antarctic ice sheet and its underlying bedrock contain important information about the geological structure of Antarctica and the evolutionary...
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Multiscale investigation into EOR mechanisms and influencing factors for CO2-WAG injection in heterogeneous sandy conglomerate reservoirs using NMR technology
Available online 2 April 2025
The sandy conglomerate reservoir is tight and exhibits strong heterogeneity, rendering conventional water flooding and gas drive methods inefficient and challenging for the effective development. CO2...
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Multidimensional data-driven porous media reconstruction: Inversion from 1D/2D pore parameters to 3D real pores
Available online 2 April 2025
Subsurface rocks, as complex porous media, exhibit multiscale pore structures and intricate physical properties. Digital rock physics technology has become increasingly influential in the study of subsurface...
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Simultaneous seismic inversion of effective stress parameter, fluid bulk modulus, and fracture density in TTI media
Available online 2 April 2025
Predictions of fluid distribution, stress field, and natural fracture are essential for exploiting unconventional shale gas reservoirs. Given the high likelihood of tilted fractures in subsurface formations,...
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Correlating the carbonic acid reaction with tight sand and pure minerals during geological carbon storage
Available online 1 April 2025
CO2 injection into geological formations has been proven to be an effective approach for carbon storage. When dissolved in formation water, CO2 forms carbonic acid that induces mineral dissolution at...
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Study on the effect of clay minerals on phase transition of methane hydrate in sand sediments: Kinetic behavior and microstructural observation
Available online 1 April 2025
Natural gas hydrates widely accumulate in submarine sediments composed of clay minerals. However, due to the complex physiochemistry and micron-sized particles of clay minerals, their effects on methane...
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Biomass thermal decomposition induced hydrogen sulfide blooming in thermal recovery reservoirs
Available online 1 April 2025
High concentration of secondary hydrogen sulfide (sH2S) in thermal recovery reservoirs of Liaohe Oilfield, NE China was concluded to originate from thermochemical sulfate reduction (TSR), and no biotic...
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A novel optimization scheme for structure and balance of compound balanced beam pumping units using the PSO, GA, and GWO algorithms
March 2025
The beam pumping unit (BPU) remains the most stable and reliable equipment for crude oil lifting. Despite its simple four-link mechanism, the structural design of the BPU presents a constrained single-objective...
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Water adsorption performance of over-mature shale and its relationship with organic and inorganic nanopores: A case study of Lower Cambrian shale from the Sichuan Basin, China
March 2025
The water adsorption performance of shale gas reservoirs is a very important factor affecting their gas in place (GIP) contents, but the water-holding capacity and mechanism of over-mature shale, especially...
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Evaluation of cement density utilizing through-casing X-Ray logging method
March 2025
In the evaluation of cementing quality, quantitatively assessing cement density is crucial along with identifying the cementation degree at the interface using acoustic logging. While the 137Cs-based...
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