Near-wellbore 3D velocity imaging inversion method based on array acoustic logging data
Available online 4 July 2025
The characterization of subsurface formations via the analysis of near-wellbore velocity profiles represents a crucial method in geophysical exploration. This technique enables the evaluation of key...
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Influence of electric and flow field characteristics on the cleaning of fillers for FCCS electrostatic separation
Available online 3 July 2025
Filler cleaning is a challenge that affects the efficient separation of FCCS particles by electrostatic methods and limits the utilization of the oil slurry. Two filler cleaning methods are proposed...
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Microscopic accumulation mechanism of helium in shale gas: Insights from molecular simulation
Available online 3 July 2025
Shale gas in southern China is found to contain economically valuable helium (He), which is inconsistent with conventional perspective that hydrocarbon gases in shale would dilute He to sub-economic...
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Finite-difference simulation of elastic waves in fluid-solid coupled media with irregular interface
Available online 2 July 2025
The finite-difference method (FDM) is an essential tool in exploration geophysics, particularly for simulating wave propagation in fluid-solid coupled media. Despite its widespread use, FDM faces significant...
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Development strategies of a gas condensate reservoir with a large gas cap, thin oil rim, strong bottom water, and natural barriers
Available online 30 June 2025
The development of gas condensate reservoirs with a large gas cap, thin oil rim, strong bottom water, and natural barriers faces numerous challenges, including reservoir heterogeneity, coning effects,...
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A novel intermingled fractal model for predicting relative permeability in tight oil reservoirs considering microscopic pore geometry
Available online 26 June 2025
Accurately predicting relative permeability is an important issue in the research of multiphase flow in tight reservoirs. Existing predictive models typically rely on the capillary tube bundle model...
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Plugging mode of flaky lost circulation materials within fractures and mechanism to enhance pressure-bearing capacity for the plugging zone
Available online 25 June 2025
During drilling operations in deep fractured tight gas reservoirs, lost circulation of working fluid frequently occurs due to the formation's low pressure-bearing capacity. Adding lost circulation materials...
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Experimental study of dehydration performance of re-crosslinkable preformed particle gel during extruding through an open fracture
Available online 24 June 2025
Re-crosslinkable preformed particle gel (RPPG) has been considered to be one of the most promising gels for dealing with fracture and void space conduit (VSC) conformance problems. However, the dehydration...
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Flow characteristics of shale oil and its geological controls: A case study of the Lucaogou Formation in the Jimsar Sag, Junggar Basin
Available online 24 June 2025
The Lucaogou Formation in Jimsar has a significant development potential due to its massive shale oil resources. Nevertheless, the complex and heterogeneous lithology, coupled with unclear flow mechanisms,...
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Rift marginal coarse-grained sediment gravity flow deposits in the Eocene Dongying Depression, Bohai Bay Basin, China: Balancing tectonic and climatic controls
Available online 23 June 2025
Previous studies have indicated that sediment gravity flow deposits developed in lacustrine active extensional rift basins are primarily influenced by tectonics and to a lesser extent by climate. Our...
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Identification and Distribution Patterns of the Ultra-deep Small-scale Strike-slip Faults based on Convolutional Neural Network in Tarim Basin, NW China
Available online 23 June 2025
The isolated fracture-vug systems controlled by small-scale strike-slip faults within ultra-deep carbonate rocks of the Tarim Basin exhibit significant exploration potential. The study employs a novel...
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Physics-informed graph neural network for predicting fluid flow in porous media
Available online 21 June 2025
With the rapid development of deep learning neural networks, new solutions have emerged for addressing fluid flow problems in porous media. Combining data-driven approaches with physical constraints...
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Experimental study of the characteristics of reverse fault slip induced by hydraulic fracturing
Available online 14 June 2025
Hydraulic fracturing (HF) has achieved significant commercial success in unconventional oil and gas development. However, it has the potential to induce fault slip. This study investigates the physical...
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Petroleum recovery from salt cavern through natural gas displacement: Insights from a gas–oil two-phase flow model with gas dissolution and exsolution
Available online 14 June 2025
The challenge of wide brine source and its additional problems come from the economy (energy consumption and other costs), security (re-dissolution of surrounding salt rocks), and environment (groundwater...
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Synthesis kinetics of B-COPNA resin monitored by the transformation of functional groups using in-situ FTIR spectroscopy
Available online 14 June 2025
B-COPNA resin, synthesized from the light fraction of ethylene tar (ETLF), is a superior precursor of the carbon materials. An in-depth understanding of the COPNA resin preparation process and strict...
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Fast simulation of EM telemetry in vertical drilling: A semi-analytical finite-element method with virtual layering technique
Available online 14 June 2025
The electromagnetic (EM) telemetry systems, employed for real-time data transmission from the borehole and the earth surface during drilling, are widely used in measurement-while-drilling (MWD) and...
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Joint inversion with prestack waveform and spectral information for layered media
Available online 14 June 2025
Subsurface reservoirs commonly exhibit layered structures. Conventional amplitude variation with angle (AVA) inversion, which relies on the Zoeppritz equation and its approximations, often fails to...
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Integrated optimization of reservoir production and layer configurations using relational and regression machine learning models
Available online 12 June 2025
This study introduces a novel approach to addressing the challenges of high-dimensional variables and strong nonlinearity in reservoir production and layer configuration optimization. For the first...
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A study on numerical simulation method of Cs2LiYCl6:Ce3+ detection response in neutron well logging
Available online 3 June 2025
Neutron well logging, using instruments equipped with neutron source and detectors (e.g., 3He-tubes, NaI, BGO), plays a key role in lithological differentiation, porosity determination, and fluid property...
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Coaly source rock evaluation using well logs: the Jurassic Kezilenuer Formation in Kuqa Depression, Tarim Basin, China
Available online 3 June 2025
Coaly source rocks have attracted considerable attention for their significant hydrocarbon generation potential in recent years. However, limited study is performed on utilizing geochemical data and...
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Surface erosion thickness and oxygen isotope of the Early Jurassic lake water in northern Sichuan Basin, evidence from clumped isotopes of shell limestones
Available online 1 June 2025
Oxygen isotope (δ18O) of paleolake water is a key indicator for reconstructing the formation temperature and diagenetic history of lacustrine carbonate minerals. In this study, we use clumped isotopes...
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Experimental and modeling investigation of zero net liquid flow in hilly terrain pipeline
May 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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Control of dual-function amphiphilic biochar-MoO3-x catalysts with abundant oxygen vacancies for efficient extractant-free oxidative desulfurization
May 2025
The development of an efficient dual-function catalytic-sorption system, which seamlessly integrates reaction and separation into a single step for extractant-free systems, represents a transformative...
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Numerical investigation on 2-D NMR response mechanisms and the frequency conversion of petrophysical parameters in shale oil reservoirs
May 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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Effects of multiphase transport in multiscale pore network on carbon storage and enhanced shale oil recovery: An experimental and numerical study
May 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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