Impact of gas in different occurrence states on P-wave amplitude in coal
Available online 10 September 2025
Coalbed methane (CBM) resources have enormous potential in energy exploration and development, and evaluating the gas content in CBM is crucial for resource assessment and development. As the P-wave...
Research on the genesis mechanism of shale fractures
Available online 10 September 2025
Shale fractures, serving as conduits for the flow and storage space of shale oil, play a critical role in resource exploration and evaluation. Shale oil is considered a highly promising unconventional...
Multiscale anisotropic mechanical properties of oil shale: new insights from nanoindentation profiling
Available online 10 September 2025
Oil shale reservoirs are characterized by significant heterogeneity in mineral components and pronounced anisotropy in micromechanical properties - both influencing resource recovery. We couple fine-scale...
Joint physics and model-guided pre-stack seismic inversion using double dual neural network
Available online 10 September 2025
Pre-stack seismic inversion is used to calculate elastic parameters, including P-wave and S-wave velocities, as well as densities. These parameters play an integral role in the characterization of reservoirs,...
ThinGPT: describing sedimentary rock thin section images with a multimodal large language model
Available online 10 September 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...
Research progress and scientific challenges in permeability evolution of hydrate bearing sediments
Available online 10 September 2025
Natural gas hydrate production involves complex mass/heat transfer, phase transformation, and multiphase seepage processes, where permeability critically influences exploitation efficiency and sediment...
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
Available online 9 September 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...
Insight into porosity of shale oil reservoirs: Comparison of helium, low−temperature nitrogen adsorption−desorption, and nuclear magnetic resonance methods
Available online 6 September 2025
Porosity is a fundamental parameter in characterizing the pore structure of shale oil reservoirs, as it directly affects the accuracy of shale oil reserve estimations. Despite the availability of various...
Shale oil occurrence state and its controlling factors in saline lacustrine basins: Insights from sequential solvent extraction
Available online 6 September 2025
Due to the complexity of the lithofacies associated with shale oil in saline lacustrine basins, the differences of shale oil occurrence state and its controlling factors in different lithofacies are...
FDEM modeling of the fracture propagation behaviors under the joint interaction of shale anisotropy and multi-lithologic stack
Available online 4 September 2025
Exploring the interaction between hydraulic fractures and complex geological conditions is critical for multilayered commingling production in the laminated continental shale oil reservoirs. In this...
Shale pore modification induced by syncline bending in the Eastern Fold Belt of Sichuan Basin, South China
Available online 4 September 2025
Shale deformation is crucial in various geological processes. To investigate the effect of deformation on pore characteristics for highly compacted shale, the macro tectonic strain and micro pore structure...
Risk-based design method for gas storage wellbore structure using grey geological information
Available online 2 September 2025
Underground gas storage facilities play a crucial strategic role in ensuring the balance of natural gas supply and demand, addressing seasonal fluctuations, and responding to emergencies. The design...
Intelligent identification method for dissolution vugs in karst reservoirs of carbonate rocks using electrical image logs: The Dengying Formation reservoir in the Gaoshiti-Moxi block, Sichuan Basin
Available online 1 September 2025
Accurately characterizing the storage space of fractured-vuggy carbonate reservoirs is a major technical challenge in the efficient exploration and development of the petroleum industry. Electrical...
Deformation and failure evolution mechanism of inherently anisotropic sedimentary rocks under true-triaxial stress
Available online 29 August 2025
Understanding the mechanical behavior and failure characteristics of anisotropic sedimentary rocks under true-triaxial in-situ stress conditions is critical in understanding and mitigating damaging...
Thermal evolution of the Paleozoic in the eastern Sichuan Basin: Insights from thermochronometric analyses and basin modeling
Available online 27 August 2025
Eastern Sichuan Basin is a critical region for oil and gas production in China, and the thermal effect of the Emeishan Mantle Plume (EMP) on the basin remains unclear, which limits the study of the...
Real-time NMR experimental study of displacement–imbibition coupling in tight/shale oil reservoirs: Lithological variations, influencing factors, and key insights
Available online 27 August 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...
LLMs-guided parameters prediction of tight sandstone reservoirs
Available online 25 August 2025
Accurate prediction of reservoir parameters is essential for reservoir evaluation. Recent machine learning methods have spurred significant advancements in reservoir prediction; however, limited well...
Imbibition mechanism analysis of modified black nanosheet and low salinity water composite system for enhanced oil recovery by NMR method
Available online 22 August 2025
Black nanosheets (BN, with a specific chemical composition of molybdenum disulfide) have been widely studied for low-permeability reservoir development due to their unique nanoscale dimensions and lamellar...
A dynamic unified well-killing model for synergistic regulation of multiple well-killing methods
Available online 22 August 2025
Ultra-deep and complex formations are characterized by narrow safety density windows and challenging well control. The combined use of multiple well-killing methods or temporary adjustments to well-killing...
Monitoring oil pipeline microbiologically influenced corrosion (MIC) and its mitigation using a biofilm/MIC test kit
Available online 22 August 2025
Microbiologically influenced corrosion (MIC) is caused by microbial biofilms. In this work, an oilfield produced water sample was analyzed using a newly developed disposable electrochemical biofilm/MIC...
Hydrate formation and agglomeration in pickering emulsions stabilized by hydrophilic and hydrophobic nano-CaCO3 particles
Available online 21 August 2025
The stability of oil-dominated emulsions, including oil-based drilling fluids and crude oils, is crucial for mitigating gas hydrate risks in the petroleum and natural gas industries. Nanoparticles can...
Investigation into the characteristics of magnesite tailings-catalyzed gasification of petroleum coke
Available online 21 August 2025
This study systematically investigated the catalytic gasification of two distinct petroleum coke (PC) using magnesium-based tailings (MT) as the catalyst. The research objectives focused on comparative...
Control of fault transport ability on hydrocarbon migration and accumulation in the No.4 structural zone of Nanpu Sag, Bohai Bay Basin, China
Available online 21 August 2025
The ability of faults to transport oil and gas is affected by multiple geological factors, and the effects of various factors on oil and gas migration and accumulation are complex. In this study, based...
Synthesis of biopolymer nanocomposites and experimental investigation on enhanced oil recovery
Available online 19 August 2025
Nanoparticles (NPs) are widely used in the petroleum industry, particularly in upstream and downstream applications, due to their quantum effects and high surface area-to-volume ratio. However, stable...
Study on the conductive mechanism and saturation model of continental shale oil reservoirs with complex mineral composition
Available online 19 August 2025
A variety of petrophysical experimental techniques were used to analyze the core samples of the Subei Basin, China, and a three-dimensional digital rock model was constructed. The electrical simulation...
