Fluid Flow Mechanisms in Tight Gas Reservoirs: A Case Study of Xujiahe Formation in the central Sichuan Basin
Available online 2 February 2026
Tight sandstone gas reservoirs exhibit low gas abundance and extensive gas-bearing lithology, presenting promising prospects for future exploration and development. However, their exploitation in the...
Drilling wellhead structure’s fire resistance evaluation with gas well blowout fires
Available online 31 January 2026
To address the absence of fire resistance evaluation methods for drilling wellhead structures under gas well blowout fires, this study firstly conducted experiments to investigate the mechanical properties...
Application of random forest model optimized with genetic algorithm for determination of minimum miscibility pressure in CO2 flooding
Available online 30 January 2026
CO2 flooding is an efficient technique for enhancing oil recovery and carbon sequestration, where accurate estimation of the minimum miscibility pressure (MMP) is crucial. Conventional experiment and...
A Technical Review of In Situ Conversion Technologies for Oil Shale
Available online 29 January 2026
The global depletion of conventional oil and gas resources has led to the exploration of alternative energy resources. Among these resources, oil shale is a fine-grained sedimentary rock with a large...
A new model of predicting the optimal mud density for maximizing the open-hole extension capacity in offshore extended-reach horizontal wells drilling
Available online 29 January 2026
The pressure fluctuation caused by the axial movement of the string easily causes the bottomhole pressure to exceed the safe pressure window, which seriously restricts the horizontal open-hole extension...
Dynamic loads on energy pipelines: origins, mitigation strategies, and future research directions
Available online 29 January 2026
Pipelines are an indispensable part of the global infrastructure for energy transportation, and their integrity poses a significant risk as the dynamic loads generated throughout their life cycle might...
Performance evaluation of hybrid polymer-phosphonate scale inhibitors in oilfield water flooding operations
Available online 29 January 2026
The formation of inorganic scales such as calcium sulfate and barium sulfate during water injection in oilfields can severely impair productivity by clogging pores and reducing rock permeability. This...
Design and analysis of a micro hydraulic Reamer-While-Drilling tool
Available online 27 January 2026
Casing window sidetracking is a key technique for tapping remaining oil in small-scale enriched zones, such as minor anticlines and thin interbeds. While reaming-while-drilling (RWD) technology can...
Inversion Method for Multi-Section Friction Factors in Horizontal Wells based on Fisher Optimal Segmentation and SSA
Available online 22 January 2026
The friction factor plays a critical role in drag and torque calculations. In the drag and torque model, the friction factor is typically treated as an average value, or the wellbore is roughly divided...
Full-Field Petroleum Production Forecasting: Is Deep Learning All You Need?
Available online 21 January 2026
We investigate full-field petroleum production forecasting using machine learning. A data-driven proxy model that predicts field-scale production under various operational scenarios is proposed. It...
Influence of Dually Modified Tapioca Starch on Drilling Fluid Filtration and Filter Cake Development on Rock Samples
Available online 20 January 2026
Degradation of biomaterials under high temperatures and saline conditions leads to deterioration and loss of performance in deep well drilling applications. This research focuses on examining the impact...
Influence of fracturing fluid rheology on proppant transport and elbow erosion: A comparative CFD-DEM study
Available online 14 January 2026
To enable the precise prediction and control of erosion in hydraulic fracturing pipelines, this study employs a CFD-DEM method coupled with a wear model to quantitatively analyze the influence of shear-thinning...
A New Prediction Model of Bottomhole Weight on Bit in Offshore Extended-Reach Drilling Based on the Integration of Intelligent Algorithms and the Physical Models of Rate of Penetration
Available online 14 January 2026
Offshore extended-reach drilling is widely employed for the efficient development of deepwater hydrocarbon fields. However, the complex subsea formation environment and downhole frictional losses lead...
Effects of TPH Contamination on Soil and Rice Growth: Assessing the Efficacy of Sodium Persulfate as a Remediation Agent
Available online 13 January 2026
Soil contamination by total petroleum hydrocarbons (TPH) poses a major risk to soil health and crop productivity. This study aims to investigate the effects of TPH on soil properties and rice growth...
Dominant lithofacies and hydrocarbon enrichment characteristics of lacustrine shale reservoirs: a case study of the Qingshankou Formation shale in the Southern Songliao Basin
Available online 13 January 2026
With the growing challenges in conventional hydrocarbon exploration, shale oil has emerged as a critical target for future energy supply. The Qingshankou Formation (K2qn) in the southern Songliao Basin...
Advanced Machine Learning Approaches for Optimizing Waterflooding: A Focus on Injector-Producer Dynamics
Available online 9 January 2026
Waterflooding persists as the primary secondary oil recovery method, although its efficiency evaluation is often hindered by limitations from reservoir heterogeneities alongside non-uniform sweep efficiency...
Laboratory Physical Simulation Study on Water Flooding EOR Mechanisms and Patterns in FM Fault- Fractured-Vuggy Reservoirs
Available online 9 January 2026
The FM fault-fractured-vuggy volatile oil reservoir exhibits significant heterogeneity and rapid production decline. Furthermore, there are notable differences in the effects of depletion development,...
Quantifying the effect of mineral compositions on the brittleness of shale using the finite element method
December 2025
The emergence of shale oil and gas has markedly boosted the global oil and gas storage and production growth, impacting the strategic energy patterns of numerous countries. However, exploring and exploiting...
Dolomitization history and fracture development of Lower Cambrian Longwangmiao Formation in the NE Sichuan Basin, SW China
December 2025
The deeply buried dolostone reservoir hosts economically significant hydrocarbon reserves. The Cambrian Longwangmiao Formation at the Nanjiang outcrop in northern Sichuan Basin is investigated using...
The application of radio-frequency identification (RFID) technology in the petroleum engineering industry: Mixed review
December 2025
Radio Frequency Identification (RFID) technology has emerged as a promising solution for real-time tracking and monitoring in the petroleum industry. This study systematically reviews recent advancements...
Production forecasting in carbonate oil reservoirs through integration of deep learning and geological parameters
December 2025
Deep learning has emerged as a groundbreaking proxy model for predicting well production, holding great promise for accelerating the advancement and management of the oil and gas industry. However,...
Fracture facies estimation utilizing machine learning algorithm and Formation Micro-Imager (FMI) log
December 2025
Natural open fractures (NOFs) in reservoir rocks are critical factors influencing permeability. Identifying these fractures and fractured zones typically involves analyzing core samples and image logs....
Surface wettability of quartz and calcite: Impact of cleavage, exposure time, and scale of measurement
December 2025
Accurately characterizing the wettability of solid surfaces is essential for various applications. Numerous factors, such as operating conditions and the features of the sample surface, affect wettability....
Potential cleaner and greener method for ultra-tight shale oil development without hydraulic fracturing: Experimental validation for CO2 and hydrocarbon gas injection
December 2025
Currently, multistage hydraulic fracturing is the primary method for shale oil development. However, it has significant environmental drawbacks including large volumes of wastewater, greenhouse gas...
Numerical modeling validation of the sealability of bismuth alloy plugs
December 2025
Due to the high demand for plugging and abandonment (P&A) of wells, concerns have been raised regarding existing solutions in terms of their capability of long-term sealing - such as cement, which is...