Quantitative evaluation of lateral sealing of faults in metamorphic rocks: A case study of Bohai Bay Basin in China
December 2025
The Archean buried-hill metamorphic reservoirs in the Bohai Bay Basin are examples of metamorphic rocks having faults with diverse strikes as a consequence of multi-phase tectonic evolution. For faults...
A stacking ensemble approach for pore pressure prediction in real-time during drilling based on mud log data
December 2025
The precise and real-time prediction of pore pressure is critical for optimizing drilling efficiency and mitigating the potential risks associated with drilling operations. In order to surmount the...
Experimental and simulation study of geochemical processes during interaction of carbonated formation water with terrigenous and carbonate rocks
December 2025
The paper addresses the issues of reducing the concentration of greenhouse gases in the atmosphere through carbon dioxide sequestration by injection to geological formations to enhance oil recovery...
Mobility evaluation of continental shale oil of the Permian Fengcheng Formation in the Mahu Sag: Reservoirs characteristics, multiple influencing factors and conceptual models
December 2025
Mobility is a crucial metric for assessing sweet spots of continental shale oil. However, due to the complexity of shale oil reservoirs characteristics and the lack of systematic analyses of factors...
Focusing mechanism and anisotropy correction of array induction logging responses for shale reservoirs in horizontal wells
December 2025
We have developed a novel method for correcting resistivity anisotropy in array induction logging (AIL) for shale reservoirs drilled with horizontal wells. This method is featured by two aspects: simplifying...
The heat-fluid-solid coupling erosion mechanism for the optimal spray distance and jet angle in high-pressure water jets
December 2025
Focusing on the conversion of pressure energy and internal energy under viscous dissipation, a heat-fluid-solid coupling method is established to study the flow and stress fields of 100 MPa submerged...
Optimization of rate of penetration through improved bit durability and extended directional nozzle
December 2025
The enhanced drilling parameters and custom-designed polycrystalline diamond compact (PDC) bits have greatly improved both rate of penetration (ROP) and footage. Then how to further improve the bit’s...
Electrorheological effect enhancement of waxy crude oil with graphene nanoparticles and its mechanism
December 2025
Electric treatment is a promising method to improve the cold flowability of waxy crude oil by taking advantage of the electrorheological (ER) effect of the crude oil. However, the efficacy of viscosity...
The control of astronomical cycles on lacustrine mixed sedimentation and hydrocarbon occurrence: A case study of the Paleogene Shahejie Formation in the Dongying Sag, Bohai Bay Basin
December 2025
Gravity flows in steep-slope zones of lacustrine rift basins interact with deep-water shales to form heterogeneous mixed sedimentation zones, yet their sedimentary evolution and hydrocarbon occurrence...
Inversion methods for elastic parameters and fracture parameters of monoclinic media induced by two groups of inclined fractures
December 2025
Fractures significantly impact oil and gas production by altering the mechanical properties of subsurface rocks. This study investigates the forward and inverse problems associated with monoclinic anisotropic...
Automated labeling and segmentation based on segment anything model: Quantitative analysis of bubbles in gas–liquid flow
December 2025
The quantitative analysis of dispersed phases (bubbles, droplets, and particles) in multiphase flow systems represents a persistent technological challenge in petroleum engineering applications, including...
Study on flow capacity and percolation behavior of hydraulically induced bedding fracture by different fluids in full-diameter shale cores
December 2025
Chinaʼs continental shale exhibits favorable geological characteristics and substantial resource potential, yet oil recovery for natural energy extraction remains critically low. Investigating the mechanisms...
A new approach to remediation of crude oil with promising green composites: Biosurfactant-producing Bacillus sp. consortium entrapped in chitosan, chitosan/glutaraldehyde and chitosan/Na-bentonite
December 2025
This study compares the crude oil removal efficiency of free and biosurfactant-producing bacterial consortia (Bacillus tequilensis NR_104919 and Bacillus axarquiensis NR_115929) entrapped in chitosan...
Research progress and scientific challenges in permeability evolution of hydrate bearing sediments
December 2025
Natural gas hydrate production involves complex mass/heat transfer, phase transformation, and multiphase seepage processes, where permeability critically influences exploitation efficiency and sediment...
ThinGPT: describing sedimentary rock thin section images with a multimodal large language model
December 2025
Rock thin section description is an essential method for examining lithology, structure, diagenesis, and sedimentary environment, playing a pivotal role in fields such as geology, geophysics, and petroleum...
Real-time NMR experimental study of displacement–imbibition coupling in tight/shale oil reservoirs: Lithological variations, influencing factors, and key insights
December 2025
Displacement–imbibition coupling production is a pivotal technology for enhancing oil recovery (EOR) in waterflooded tight/shale oil reservoirs. However, the microscopic fluid transport mechanisms across...
Multifactor controls on imbibition oil recovery in shale: Insights from low-field nuclear magnetic resonance
December 2025
Shale is characterized by a complex mineral composition and a well-developed, multiscale pore network spanning from micropores to nanopores, which gives rise to a highly intricate microscopic imbibition...
Grain boundary strength in methane hydrates
December 2025
Grain boundaries (GBs) in natural gas hydrates (NGHs) are ubiquitous crystal imperfection that undermine the stability of NGHs. In this study, we report the diverse cage structures and mechanical properties...
Swelling kinetics of polymer microspheres used for conformance control and their matching mechanisms with oil reservoir fractures
December 2025
Polymer microspheres are one type of particle gel with swelling property, and the particle size is distributed between nanometer and micron. Because of the good variability and migration characteristics,...
Molecular dynamics simulation of methane isotope fractionation in two-phase flow within inorganic pores
December 2025
Carbon isotope fractionation served as a key geochemical indicator for understanding shale gas storage and migration. However, the detailed mechanism of the fractionation behaviors of methane isotopes...
TOC
December 2025
OFC
December 2025
Fast algorithm of borehole correction library construction for multi-component array induction tool in deviated boreholes
December 2025
The construction of a borehole correction library for the multi-component array induction tool in deviated boreholes involves extensive 3D forward modeling and typically requires significant computational...
Illitisation impeded the thermal evolution of extractable organic matter: An interpretation of the mineralogy and thermal maturation of early Cambrian source rocks in Yunnan Province, China
December 2025
The degree of thermal alteration of organic matter in sediments is crucial for comprehending the progress of oil and gas generation. The thermal maturity of kerogen, which is a component of the organic...
Insights into the charging behavior of tight oil under nanoscale confinement effects
Available online 31 December 2025
As conventional oil dwindles, tight oil gains importance for its vast potential. The physical property limit refers to the minimum pore size at which reservoir fluid can be charged under a defined accumulation...