Microscopic experiments and simulations of CO2 huff-n-puff displacement mechanism considering heterogeneity and fractures
May 2026
Heterogeneity and fractures significantly influence oil and gas migration. However, current research remains insufficient in clearly visualizing CO2 displacement mechanisms under such reservoir conditions....
Techno-economic co-optimization of CO2 enhanced oil recovery strategies in a tight oil reservoir using coupled improved evolutionary algorithm and machine learning framework
May 2026
Massive carbon dioxide (CO2) emissions drive climate change. Injecting CO2 into unconventional reservoirs achieves both enhanced oil recovery (EOR) and geological sequestration. However, simultaneously...
Semi-supervised learning for AVO inversion with bidirectional spatial feature constraints
May 2026
Prestack amplitude variation with offset (AVO) inversion using one-dimensional convolutional neural networks often lacks lateral continuity. While two-dimensional methods improve this, they are limited...
Coordinate-transformation-based fast sweeping method for the factored eikonal equation on triangular meshes
May 2026
Accurate traveltime computation in complex geometries is crucial for seismological applications such as traveltime tomography and migration. However, eikonal solvers relying on finite-differences encounter...
Wax deposition characteristics under oil-water two-phase stratified flow in pipeline
May 2026
Wax deposition in subsea pipelines transporting waxy crude oil under oil-water stratified flow remains a critical flow assurance challenge. This study systematically investigates wax deposition characteristics...
Gas-solid two-phase flow erosion of needle throttle valve in shale gas field based on CFD-DEM model
May 2026
Needle throttle valve (NTV) is a key equipment to ensure the safe production of shale gas fields, but it is often seriously eroded by the solid particles in the produced gas. At this work, the CFD-DEM...
Insights into the charging behavior of tight oil under nanoscale confinement effects
May 2026
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...
MSA-DETR: Multi-scale attention enhanced DETR for object detection in oilfield surveillance
May 2026
In modern petroleum engineering, ensuring operational safety at drilling sites is of critical importance. Visual object detection plays a key role in intelligent safety monitoring systems by enabling...
Effects of salinity variations on shale imbibition behavior: Insights into the microscopic mechanisms
May 2026
Shale reservoirs contain abundant micro/nanoscale pores, which facilitate capillarity-dominated imbibition as an effective mechanism for enhancing hydrocarbon recovery. During hydraulic fracturing,...
Oil-gas conditions of the Proterozoic metamorphic basement reservoirs in the Wensu Salient, Tarim Basin, China
May 2026
In 2017, Well XWD1 drilled in the Wensu Salient, northwest Tarim Basin achieved the first hydrocarbon discovery in Proterozoic metamorphic rocks within the western basin of China. However, uncertainties...
Evolution process and controlling factors of gas content in marine–continental transitional shales: Insights from numerical modeling
May 2026
Marine-continental transitional shale (MCTS) gas holds excellent gas-generating hydrocarbon basis and exploration potential. Conducting quantitative analysis on the evolution of shale gas content and...
Adaptive weight strategy for frequency-decomposed seismic attribute fusion in predicting of complex sand body distributions
May 2026
High-precision sand prediction is fundamental to improving the efficiency of oil and gas exploration and development. To address the limitations of traditional fixed-weight fusion strategies, particularly...
Experimental study of the flow characteristics of surfactant-assisted aerosols in low permeability porous media
May 2026
Gas channeling in formations is a primary factor affecting the effectiveness of gas flooding and CO2 geo-storage. Current dominant methods for controlling gas channeling include water-alternating-gas...
Molecular insights into asphaltene desorption from silica surface by ionic and non-ionic nitrogen-based additives
May 2026
The strong adsorption of asphaltenes on reservoir minerals is a major constraint on heavy oil recovery. Although some nitrogen-based chemicals have shown promise in desorbing asphaltenes, their working...
Hydraulic-mechanical analysis of induced stress change in unconventional reservoirs using a novel fundamental solution of poromechanics in a half space
May 2026
The production of fractured unconventional reservoirs induces stress changes, which will affect the production performance of neighboring wells. To quantify such effects, the analytical solution is...
Collaborative optimization of well operations and adjustment strategies in waterflooding reservoirs using an enhanced adaptive differential evolution algorithm
May 2026
Efficient optimization of well operations and adjustment strategies in large-scale waterflooding reservoirs is a high-dimensional and complex challenge due to strong decision coupling and reservoir...
Analytical model for lateral peak soil resistance based on pipe-soil interaction full-scale test and numerical simulation
May 2026
Pipelines, as critical infrastructure for oil and gas transportation, require precise evaluation of peak loads in displacement-prone zones to ensure operational safety. The current design guidelines...
OFC
May 2026
Effect of cashew nutshell liquid-modified EVAL on flow behavior and crystallization of waxy systems
May 2026
Light crude oils are being progressively depleted as the dominant primary energy source, leading to increased attention on the extraction and utilization of highly waxy crude oils. To address the poor...
The present-day stress state and its impact on drilling and reservoir management in a field of the Abadan Plain, Southwest Iran
May 2026
The present-day stress state of the Abadan Plain in Southwest Iran is a critical factor in the management of drilling operations and reservoir development. This research integrates multiple data sources,...
Fracture propagation mechanisms of cross-layer fracturing with directional perforation in off-target horizontal wells
May 2026
Multi-stage fracturing with horizontal wells is a pivotal technique for developing the unconventional reservoirs. Owing to complex geological conditions coupled with inherent limitations in existing...
Embedment behavior of variable-radius indenters in shale: A combined experimental and theoretical approach
May 2026
During the shale gas extraction, a larger fracture closure stress causes proppants to embed in the shale surface, greatly reducing fracture conductivity. The heterogeneity of shale makes its mechanical...
Research and application of thin sandstone identification technique based on post-stack seismic data: A case study of Ecuador’s M reservoir
May 2026
The M sandstone member within the Cretaceous Napo Formation is a critical hydrocarbon reservoir in the Oriente Basin's foredeep belt. However, its characterization is severely challenged by its thin-bed...
An anisotropy-dynamic ant colony optimization with probabilistic fracture uncertainty quantification for sub-seismic fault detection
May 2026
The precise characterization of subsurface fracture systems, especially sub-seismic fractures below seismic resolution, is critical for developing complex hydrocarbon reservoirs. While ant colony optimization...
