TOC
April 2026
Three-dimensional heat transfer model of oil-water two-phase stratified flow
April 2026
Oil-water stratified flow, a fundamental pattern in multiphase pipe flow, is commonly encountered in offshore petroleum production and transportation. Although hydraulic characteristics of this flow...
Possible origin of deep hydrocarbons and transformation of complex petroleum systems within the Earth's crust
April 2026
We demonstrate that the conditions established in laboratory settings—such as initial reaction products, thermobaric parameters, and redox environments—are indeed analogous to those that may exist in...
Technical enhancement amine gas treating and cost reduction by assisting response surface methodology
April 2026
The process of amine sweetening of natural gas is crucial to purify it, meet environmental regulations, and boost its commercial value. This study proposes a novel hybrid optimization framework combining...
Effects of swelling clay layers on fluid production from hydrate-bearing sediments induced by depressurization
April 2026
Clay-rich sediments are common in natural gas hydrate reservoirs and pose significant technical challenges in past field production tests. Among these, Na-montmorillonite significantly affects methane...
Effects of lamina on petrophysical properties and brittleness of shales: Insight from lamina-scale experiment and fracture propagation simulation
April 2026
Accurate shale characterization is hampered by the lack of high-resolution analytical techniques to probe the in situ petrophysical and mechanical properties at the lamina scale. Here we report for...
Structural-state integrated modeling of multi-mechanism formation damage during drilling–completion
April 2026
To address the modeling fragmentation and predictive deviation caused by the conventional “single-mechanism, weakly coupled, additive response” approach in formation damage research, this study proposes...
Advances in intelligent defect recognition method for oil and gas pipeline weld X-ray image
April 2026
Long-distance pipelines are essential for transporting oil and gas, with the quality of welds directly affecting their safety and reliability. Weld defects can emerge during the welding process due...
Pore structure-controlled CO2 huff-n-puff efficiency in Jimusar shale oil reservoirs: Insights from classified oil reservoirs
April 2026
CO2 huff-n-puff is a promising enhanced oil recovery technique for shale oil reservoirs, but its efficiency in relation to pore structure across classified oil reservoirs remains unclear. This study...
A novel local maximum synchrosqueezing W transform for reservoir characterization
April 2026
Time-frequency analysis (TFA) serves as a critical tool in seismic signal processing and interpretation, particularly for characterizing non-stationary signals. However, conventional TFA methods, such...
A new method for fluid saturation calculation in low resistivity oil reservoirs with nuclear magnetic resonance-constrained triple-water resistivity model
April 2026
To address the evaluation difficulty of hydrocarbon saturation in low resistivity reservoirs, an innovative method for calculating oil saturation is proposed using a nuclear magnetic resonance (NMR)-constrained...
Hydrate phase equilibria in oil-containing fluid: Experimental investigation and machine learning prediction based stacked ensemble
April 2026
During oil and gas development and transportation, the presence of oil and complex component in natural gas significantly impacts the hydrate phase equilibrium. However, the specific characteristics...
Carbon isotopes of asphaltene-occluded hydrocarbons: A proxy for bitumen vein source identification in northwest Sichuan Basin, China
April 2026
The Lower Cambrian bitumen veins in northwestern Sichuan Basin originated from Precambrian paleo-oil reservoirs, yet the severe alterations of bitumen and high maturity of potential source rocks challenge...
Boosted organic carbon accumulation in the Late Cretaceous Songliao Basin during marine incursion events
April 2026
Although the Late Cretaceous marine incursion events (MI) significantly boosted organic carbon (OC) accumulation in the Songliao Basin, their net effects and accumulation mechanisms have long been debated....
Heterogeneity in the molecular composition of effluent organic matter from petrochemical wastewater treatment plants in China
April 2026
The proliferation of petrochemical plants close to natural water bodies has resulted in emission of numerous organic pollutants into aquatic environments. However, the molecular composition of petrochemical...
An interpretable attention-guided generative adversarial network framework with dual-domain learning for multi-condition constrained sedimentary facies modeling
April 2026
Sedimentary facies modeling is a critical approach for understanding geological phenomena, yet the strong heterogeneity of reservoir systems poses a serious challenge for their refined characterization....
Occurrence mechanism of shale oil in laminated shale reservoirs: A review
April 2026
Shale oil is an important unconventional resource. In-depth exploration of the shale oil occurrence mechanism is beneficial for the selection of sweet spots and the innovation of production technologies....
OFC
April 2026
Seepage and blockage characteristics of methane hydrate-bearing porous media under different hydrate distribution conditions
April 2026
Blockage commonly occurs in and severally affects natural gas (mainly methane) reservoir exploitation, combustion ice (methane hydrate) exploitation and oil and gas pipeline transportation. The formation...
Analysis of solidification process and gas sealability of Sn58Bi alloy plugging casing
April 2026
The Sn58Bi alloy plug, composed of 58% bismuth (Bi) and 42% tin (Sn), emerges as a promising alternative to conventional cement plugs. Investigating its mechanical behavior throughout the molten-to-solidified...
CT investigation on oilwell cement deterioration caused by H2S along a leaking channel under high temperature: Insights for geothermal applications
April 2026
The alteration of oilwell cement due to H2S poses a significant threat to wellbore structural integrity in geothermal environments. However, laboratory studies on the cement deterioration process caused...
Unveiling the role of Janus nanoparticle shape in trapped oil displacement: A molecular perspective
April 2026
Janus nanoparticles (JNPs) exhibit significant promise for enhancing oil recovery (EOR). However, their large-scale field deployment remains challenging. A key challenge lies in the insufficient understanding...
Gelation and reservoir conformance control performance of in situ crosslinked polymer gels prepared with different crosslinkers
April 2026
In situ crosslinked polymer gels (ISCPGs) are widely applied in petroleum reservoirs for conformance control and water shutoff to improve oil recovery. However, the differences in gelation behavior...
Multi-component composite steam flooding (MCCSF) expanding steam chamber and suppressing water invasion in edge-water heavy oil reservoirs: A comparative 3D experimental study
April 2026
The development of heavy oil reservoirs with edge-water presents significant challenges during pure steam flooding (PSF), including steam override, severe channeling, limited displacement/sweep efficiency,...
An integrated deep learning framework for full-cycle CCUS-EOR evaluation and optimization under carbon neutrality
April 2026
Carbon capture, enhanced oil recovery (EOR)-utilization and storage (CCUS-EOR) is recognized as an effective approach to mitigate greenhouse gas emissions while delivering economic benefits. However,...
