Co-pyrolysis of oily sludge and lignin for fabrication of high-performance adsorbent for oily wastewater treatment
Available online 4 March 2026
Oily sludge, a hazardous by-product of the petroleum industry, poses significant environmental risks due to its elevated levels of hydrocarbons and heavy metals. As conventional disposal methods often...
Pressure-regulated pore structure evolution and dielectric performance enhancement in MgO/epoxy composite systems
Available online 3 March 2026
With the surging demand for unconventional oil and gas extraction, the insulation performance of downhole high-power electric heaters has become a critical bottleneck limiting long-term stable operation....
Mechanisms of miscible gas injection for ultra-low permeability carbonate reservoirs:A case study of the S reservoir in the H Oilfield, Iraq
Available online 3 March 2026
The S reservoir is a typical Middle Eastern carbonate formation characterized by a formation temperature of 89 °C, salinity of 200,000 mg/L, and permeability below 1 mD. It exhibits low and continuously...
A new model to predict the Electrical Submersible Pump’s characteristic curves under highly viscous flow
Available online 3 March 2026
Electrical Submersible Pumps are a key artificial lift method, particularly in challenging oilfield operations involving highly viscous fluids such as heavy oil, emulsions, or subsea boosting applications....
Competition between viscous and capillary forces triggers diversity of fluid distribution and imbibition modes
February 2026
Spontaneous imbibition is the process in which the wetting phase displaces a non-wetting phase under the action of capillary forces. However, variations in interfacial properties, imbibition directions,...
Seismic simulation for distributed acoustic sensing data using a novel stress and strain-rate elastic wave equation
February 2026
Distributed acoustic sensing (DAS) is an advanced seismic acquisition technology with many advantages, such as low cost, wide frequency band, dense spatial sampling, and continuous recording. The straight...
Helium dynamic accumulation process in the Hetianhe gas field, Tarim Basin, northwest China
February 2026
Helium (He) is considered an indispensable rare resource due to its critical applications in high-tech fields such as low-temperature superconductivity, magnetic resonance imaging, and aerospace. However,...
Study of the effect of nanoemulsion on the EOR in low-permeability, highly waxy oil reservoirs based on NMR displacement experiments
February 2026
Wax precipitation damage caused by cold water injection or temperature reduction is very commonly seen in the development of waxy crude oil reservoirs. Various methods for eliminating wax precipitation...
A machine learning method for evaluating shale gas production based on the TCN-PgInformer model
February 2026
Since shale gas is a valuable energy resource, effective planning for its extraction and utilization depends on precise forecasting of gas well production. Conventional models need long computation...
Application of a CWFS model-based brittleness index for evaluating anisotropic brittleness in terrestrial shale under triaxial stress
February 2026
For shale reservoir operations, assessing the brittleness of anisotropic shales is vital of optimizing wellbore stability analysis and fracturing design. Current brittleness indices lack effectiveness...
Mechanism and influencing factors of electroosmosis-driven residual water drainage in soft coal seams during coalbed methane recovery
February 2026
Soft coal seams with low porosity are prone to water-blocking during mid to late stages of coalbed methane production, reducing gas recovery. To address this, an electroosmosis-driven drainage strategy...
A novel approach to evaluating remaining oil potential using dynamic connectivity and bivariate mapping in large-scale reservoirs
February 2026
In the development of water flooding reservoirs, enhancing oil recovery often requires implementing measures tailored to the reservoir's specific characteristics. A critical step in this process is...
Fracture response patterns in deep to ultra-deep tight sandstones: A comparison based on core and borehole images
February 2026
Natural fractures serve as the primary storage spaces and flow pathways in deep to ultra-deep tight sandstone reservoirs, directly influencing hydrocarbon accumulation, preservation, and production....
Geochemical characteristics and sources of natural gas in the Upper Paleozoic limestone strata, Ordos Basin
February 2026
The discovery of high-yield industrial gas flows in the limestone layer of the Permian Taiyuan Formation in the Ordos Basin highlights promising prospects for natural gas exploration and has positioned...
Enhancing acrylamide-based polymer performance in high temperature drilling fluid: Role of isopentenol polyoxyethylene ether
February 2026
Acrylamide-based polymers have been widely applied in drilling fluids due to their excellent water solubility, structural tunability, and adaptability to various fluid systems. However, under high-temperature...
NMR-monitored CH4 adsorption/desorption dynamics in shale: Implications for CO2-ESGR and in-situ sequestration
February 2026
Addressing the inherent challenges of low recovery rates and difficulties in shale gas extraction, this study investigates the application potential of CO2-enhanced shale gas recovery (CO2-ESGR) coupled...
Long-term sustained release of small molecular surfactants using microcapsules
February 2026
The controlled manipulation of surfactant concentration is essential for optimizing performance in numerous industrial applications, such as enhanced oil recovery in oil industry. However, encapsulating...
TOC
February 2026
Comparing the thermal processing with slurry phase hydroupgrading to increase the yields of distillates of Arabian heavy crude oil
February 2026
With the increasing heavy and inferior quality of global oil resources, the efficient utilization of crude oil has become a critical challenge to be solved in the energy field. This work intends to...
Application of acrylic-based wellbore strengthening material in water-based drilling fluid to stabilize the fractured formation
February 2026
Wellbore instability is the main challenge encountered during borehole construction, particularly when employing water-based drilling fluid (WBDF) under complex geological conditions. A novel wellbore...
Stability mechanism and steady-state flow characteristics of oil-resistant foam in high-salinity reservoirs
February 2026
High salinity and high oil content present major challenges to the effectiveness of foam in enhanced oil recovery (EOR). This study introduces RCS, a novel oil-resistant foam system designed for reservoirs...
Study on the phase behavior and minimum miscible pressure of CO2-shale oil in nanopores with confinement effect
February 2026
CO2 injection is a significant enhanced oil recovery method in shale oil reservoirs and facilitates the mitigation of CO2 emissions. However, the phase behavior and miscibility process of light shale...
Changes in the effective absolute permeability of hydrate-bearing sands during isotropic loading and unloading
February 2026
The effective stress of marine sediments frequently shifts owing to natural or anthropogenic factors, and a broad spectrum of processes fundamentally require accounting for sediment responses to such...
The impact of fossil energy technological progress on sectoral implied energy intensity: Evidence from the U.S. shale gas revolution
February 2026
This paper investigates how sectoral implied energy intensity responds to energy technology progress, using the U.S. shale gas revolution—the most significant energy breakthrough of the 21st century—as...
Numerical investigation of natural gas-enhanced autothermic pyrolysis for optimizing in-situ conversion in oil shale
February 2026
The autothermic pyrolysis in-situ conversion process for oil shale (ATS) offers the advantages of low development costs and the capability to exploit deep oil shale resources. However, oil shale formations...