Fluid inclusion analysis and carbonate U–Pb dating reveal shale oil accumulation processes in the Qingshankou Formation, Songliao Basin, NE China
October 2026
Direct constraints on the absolute timing of shale oil accumulation and microscale migration within shale systems remain limited. Here we investigate ostracod limestone interbeds, calcite veins, and...
Quaternary spatiotemporal evolution and multi-factor driving mechanisms of continental slope canyon–fan systems in Baiyun sag, Pearl River Mouth Basin, South China Sea
October 2026
As potential targets for deep-sea hydrocarbon exploration, continental slope canyon–fan systems preserve records of sea-level fluctuations and paleoclimatic changes. The Quaternary canyon–fan system...
Impact of fracture filling states on acid transport and conductivity in deep carbonates
October 2026
Acid fracturing is a key stimulation method for deep and ultra-deep carbonate reservoirs, where extreme temperature-stress conditions and pervasive natural fractures frequently compromise treatment...
Online residual correction and hybrid modeling framework for cross-regional rate-of-penetration prediction
October 2026
In oil and gas drilling, the mechanical rate of penetration (ROP) is a key indicator of drilling efficiency, and its optimization is crucial for reducing drilling costs and shortening operational cycles....
Novel fracture network modeling method for tight reservoirs integrating mechanical and geometric characteristics
October 2026
Discrete fracture network (DFN) modeling is widely applied to characterize fracture systems in tight reservoirs, yet its accuracy is often limited by the insufficient integration of geological, geometric,...
Unlocking shale oil: Synergistic mechanisms of CO2 extraction enhanced by fractures and surfactants
October 2026
The development of unconventional oil and gas resources is currently the primary focus of the petroleum industry. Shale oil has attracted significant attention due to its vast reserves. However, shale...
Insight into mass transfer mechanism of CO2–N2 mixed gas with oil
October 2026
The appropriate selection of CO2–N2 mixed gas is critical for cost-effective and efficient gas flooding in enhanced oil recovery. Optimizing this process requires a molecular-level understanding of...
Multi-task ensemble learning for real-time efficiency prediction and condition diagnosis in beam-pumping well systems
October 2026
Currently, real-time efficiency prediction and condition diagnosis for beam-pumping well systems predominantly rely on single-task models. However, conventional single-task approaches typically require...
High-resolution reconstruction of 3D seismic data using generative adversarial networks with global grouped coordinate attention mechanism
October 2026
Due to limitations in exploration costs and surface conditions, actual seismic data are often sparsely sampled and exhibit irregular coverage, which weakens the effects of migration imaging and wavefield...
A critical review of analytical oil flow rate models for vapour extraction and its non-condensable gas-based hybrids
October 2026
Analytical models are the preliminary reservoir engineering processes performance prediction tools that are quick and less costly compared with experiments and simulations when sufficiently modelled...
Multi-stage deep neural network fusion for hybrid optimization full waveform inversion
October 2026
Full waveform inversion (FWI) has emerged as a powerful physics-based optimization technique for reconstructing subsurface parameters with high accuracy and resolution. Despite its strong theoretical...
Experimental research on failure mechanism and evolution characteristics of thermal-treated granites under action of impact load with PDC cutter
October 2026
High rock temperatures and complex engineering environments are the most significant problems in enhancing the rate of penetration (ROP) and drilling tool efficiency for hot dry rocks (HDR). Studying...
Identifying the magnesium source in hydrothermal dolostone reservoirs: A multi-proxy approach using δ26Mg, δ44/40Ca, and 87Sr/86Sr
October 2026
Dolostone, especially replacement dolostone, is a significant component of Earth's carbonate rock archive. Hydrothermal dolostones, often associated with fault zones, play a crucial role in the dolostone...
Mechanisms of microfracture impact on reservoir quality and gas saturation in tight sandstones
October 2026
Microfractures are believed to significantly influence gas storage and flow in tight sandstones, yet there is a continued need for quantitative methods to better understand their impact on reservoir...
Numerical study on hydraulic fracture propagation in anisotropic shale considering bedding plane characteristics
October 2026
China possesses abundant shale gas resources. As the core method for enhancing shale gas production, hydraulic fracturing technology has seen increasing application alongside the rapid development of...
Dual-branch wavelet-fusion U-Net for vibroseis harmonic noise attenuation
October 2026
Vibroseis is widely used in land surveys, but source-ground coupling and equipment nonlinearities generate second- and higher-order harmonics as well as narrowband resonance lines. These source-related...
The energy-concentrated transform for gas-bearing reservoir identification
October 2026
Identifying gas-bearing reservoirs remains challenging in seismic exploration because the time-frequency (TF) response of seismic signals is often complex and difficult to interpret. Newly developed...
Thermodynamic indicator of water sensitivity in deep geo-energy reservoirs
October 2026
This study proposes a thermodynamic characterization method for reservoir water sensitivity based on macro-lens infrared thermal imaging, aiming to address the lack of an efficient and fully quantitative...
Downhole vibration recognition using a wavelet transform based convolutional neural network model
October 2026
Severe downhole drill-string vibrations can accelerate fatigue damage, leading to substantial economic losses and increased non-productive time. Existing vibration monitoring approaches typically rely...
Dynamic retention and geochemical interactions during zwitterionic surfactant–ATBS polymer flooding in carbonates under harsh conditions
October 2026
Surfactant–polymer (SP) flooding in carbonate reservoirs under high-temperature, high-salinity (HTHS) conditions is governed not only by interfacial and rheological properties but also by carbonate...
Numerical investigation of the mechanisms of fluid pressure drop induced by rod centralizer in progressing cavity pump wellbore annulus
October 2026
To elucidate the pressure drop characteristics and underlying mechanisms induced by a rod centralizer in a progressing cavity pump (PCP) wellbore annulus, a CFD-based multiphase flow numerical model...
Multi-objective optimization of oilfield water injection operations under dynamic electricity prices: For equivalent reduction of carbon emissions
October 2026
Low-carbon oilfield requires the water injection system with huge electricity consumption to reduce carbon emissions, and there is an urgent need to establish an operation optimization method with low-carbon...
A fast bidirectional pressure decay method for measuring permeability and porosity in tight rocks
October 2026
Permeability and porosity parameters of tight rocks are of crucial importance to the applications ranging from extraction of geothermal and hydrocarbon resources to subsurface storage of carbon, nuclear...
Diagenetic origins of low resistivity pays in low-permeability sandstone reservoirs: Insights from petrology, hydrochemistry, and machine learning
October 2026
Low-permeability sandstone reservoirs containing low resistivity pays (LRPs) are widely encountered within the Triassic Yanchang Formation in the Jiyuan area, Ordos Basin, China. The resistivity of...
Innovative design of a fully mechanical well deviation measurement system with experimental validation
October 2026
With the advancement of ultra-deep well drilling and dry hot rock energy development, the demand for measurement-while-drilling (MWD) systems has grown increasingly critical. The electronic MWD system...
