Preparation and Mechanistic Analysis of High-Selectivity Water Control Systems
Available online 28 November 2025
This paper presents a highly selective water control system designed to address declining oil production in offshore wells caused by rising water cuts while overcoming the poor selectivity of current...
Data-driven real-time prediction of cutting’s transport index in directional wellbores
Available online 28 November 2025
The drilling of non-vertical wellbores requires effective real-time monitoring techniques to improve drilling efficiency. This study innovatively develops nine robust hybrid machine learning (HML) models...
Pressure Transient Analysis of Commingled Multilayer Reservoirs: A Deconvolution-Based Approach for Individual Layer Characterization Using Sparse PLT Data
Available online 26 November 2025
Layering is common in hydrocarbon reservoirs due to stratified sedimentary deposition, with each layer exhibits distinct characteristics. Multilayer reservoirs are typically classified as systems with...
Fracture conductivity damage in shale oil reservoirs: Mechanism model and its impact on oil production
Available online 26 November 2025
Shale oil reservoirs often experience severe hydraulic fracture stress sensitivity and conductivity damage, leading to rapid production decline and low oil recovery. Understanding fracture damage mechanisms...
Integrated Approach and Insights into Shale Gas Potential: Geological, Petrophysical, Geochemical, and Geomechanical Evaluation of the Khatatba Formation (Western Desert, Egypt)
Available online 26 November 2025
This study provides a comprehensive assessment of the shale gas potential of the Middle Jurassic Khatatba Formation in the Obaiyed Field, Western Desert, Egypt, by integrating geological, petrophysical,...
Experimental Investigation of Pressure, Temperature, and Salinity Effects on the Interfacial Tension of H2/brine/Cushion Gases: Implications for H2 Geo-Storage
Available online 25 November 2025
Underground hydrogen storage (UHS) in saline aquifers is a promising solution for large-scale, long-duration energy storage in a low-carbon energy system. Cushion gases, such as N2, CO2, and CH4, are...
Comprehensive judgment method of low production causes in tight gas reservoirs——Taking the LX gas reservoir in Ordos Basin as an example
Available online 15 November 2025
The low productivity of tight gas reservoirs arises from complex and multifaceted causes, and elucidating these factors is crucial for guiding the formulation of effective stimulation strategies. Conventional...
Asphaltene Deposition During Miscible and Immiscible Gas Injection in Tight Heavy Oil Reservoir: Implications for Formation Damage
Available online 11 November 2025
Gas injection is frequently used to displace the trapped oil. However, this may lead to deposition of asphaltene, which can profoundly block the pores and throats of the porous media, resulting in reduced...
Physicochemical characterization of oilfield produced water and its treatment constraints
Available online 1 November 2025
Produced water is the largest waste stream generated during oil and gas production, presenting significant environmental risks due to its complex chemical composition. Characterizing the contaminant...
Research on intelligent kick early warning technology based on LSTM-AE unsupervised learning
Available online 25 October 2025
In oil and gas exploration, kick is a typical high-risk downhole incident. Currently, most intelligent kick detection methods belong to supervised learning, which depends on labeled samples and is prone...
A review on cementing system for CO2 storage wells: Mechanisms, testing protocols and screening criteria
Available online 24 October 2025
Long-term containment of CO2 in geological formations demands cementing systems that can withstand highly aggressive downhole environments, where carbonic acid, brine, and other reactive species threaten...
Research on segmented modelling and prediction of shale gas production based on time series analysis
Available online 15 October 2025
At present, the world is experiencing an unprecedented period of change, and the third wave of energy conversion is also emerging. Natural gas is widely regarded as an ideal bridge between traditional...
Dolomitization history and fracture development of Lower Cambrian Longwangmiao Formation in the NE Sichuan Basin, SW China
Available online 10 October 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...
Integrated electrochemical and machine learning framework for SiO2/CaCO3 under-deposits driven welded X65 carbon steel corrosion mitigation in sour service conditions
Available online 6 October 2025
The integrity of welded X65 carbon steel (CS) pipelines in oil and gas systems is significantly compromised by preferential weldment corrosion (PWC) and pitting in sour conditions. This study clarifies...
Carbon capture and storage: An evidence-based review of its limitations and missed promises
Available online 6 October 2025
Despite over $40 billion invested globally, Carbon Capture and Storage (CCS) captures and stores less than 0.1% of annual global CO2 emissions, raising serious questions about its efficacy as a climate...
Synergizing foam stability, gas mobility control, and oil recovery: A new approach combining silane-silica oxide and MFomax
Available online 4 October 2025
Oil reservoirs subjected to a gas recovery technique are commonly challenged by early gas breakthroughs affecting the production rate. Foam is injected to block and divert gas to reservoir sections,...
Alumina nanofluid enhances the heavy-oil upgrading process
Available online 4 October 2025
Upgrading heavy crude oil remains one of the most critical and technically demanding processes in the petroleum industry, primarily due to the inherently poor quality of the various types of crude oil...
Comprehensive permeability-transform solutions for shale and sandstones using data sets from around the globe
Available online 3 October 2025
This study uses 13 proprietary data sets from sedimentary basins around the globe to constrain the permeability and porosity ranges occupied by clastic rocks (sandstones and shale). The combined data...
Seismic attribute integration and neural network analysis for quantitative reservoir characterization: A case study from the Offshore Nile Delta (Egypt)
Available online 1 October 2025
Accurate reservoir characterization is essential for optimizing hydrocarbon exploration and production, particularly in complex deep-water environments. The Simsat Field, Offshore Nile Delta, features...
Corrosion patterns and optimal materials of tubings in sulfur purification buried wells in the Sichuan Basin
September 2025
The study aims to explore the corrosion behaviors of tubings of different materials under the injection condition of sulfur-containing purification exhaust gas buried storage well and select a proper...
A new intelligent optimization method for drilling parameters of extended reach wells based on mechanical specific energy and machine learning
September 2025
Extended reach wells (ERWs) can efficiently develop offshore satellite oilfields, reduce development costs and improve economic benefits. However, owing to the complex geological conditions, it is difficult...
Application of hybrid numerical reservoir simulation and artificial neural network for evaluating reservoir performance under waterflooding
September 2025
In the current study, an artificial neural network (ANN) and a numerical reservoir simulation (NRS) technique are used to analyse reservoir performance under waterflooding in the ZH86 block of the Zhaozhouqiao...
Enhancing oil recovery with MWCNT and GO nanocomposites in high salinity heterogeneous media
September 2025
Water injection remains the predominant method in the oil recovery process, but chemical flooding methods such as nanohybrid injection, with its distinct advantages, emerge as a promising alternative...
Study on electrochemical corrosion of P110 tubing during air injection oil flooding
September 2025
This article addresses the corrosion problem of P110 tubing during the process of enhancing oil recovery by injecting air. The effects of changes in oxygen content and tensile stress on the corrosion...
Achieving low-carbon future through CO2 storage: A comprehensive review of global projects and policies
September 2025
Climate change mitigation efforts require innovative solutions to reduce GHG emissions. CCUS is a crucial technology for achieving a low-carbon economy. However, significant research gaps exist in understanding...