Gas enhanced oil recovery methods for offshore oilfields: Features, implementation, operational status
June 2025
Nowadays, enhanced oil recovery (EOR) methods have been evaluated both for onshore and offshore oilfields. However, the conditions for using EOR methods in offshore fields are more complex due to the...
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Comparative organic geochemistry of shale deposits of northern Appalachian Basin
June 2025
The organic-rich black shales in the Appalachian basin are a vital producer of natural gas. In this study, we present new multiproxy geochemical data from the Ordovician and Devonian black shales in...
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Early oil charging from Sinian shales in Ordovician carbonates of the Tabei Uplift, Tarim Basin: Evidence from biomarkers
June 2025
Despite over 40 years of exploration focusing on the deep to ultra-deep Ordovician carbonates as major hydrocarbon targets in the Tarim Basin, the identification of their source rocks remains elusive....
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Comparing the effect of nanofluids in capillary imbibition with traditional displacing fluids
June 2025
The effectiveness of surfactant solutions, polymers and nanosuspensions in capillary imbibition was studied comparatively. Two series of experiments on capillary imbibition with displacing liquids from...
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Optimization of fracturing parameters for horizontal wells in high-sulfur gas reservoirs considering the effect of sulfur deposition
June 2025
During the development of high-sulfur gas reservoirs, the precipitation and deposition of elemental sulfur can lead to a reduction in reservoir porosity and permeability. Previous studies focus on the...
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Mitigating gas migration with eutectic bismuth alloy plugs
June 2025
Gas migration is an important concern to address in oil wells, especially in those that are to be abandoned. Stopping a gas leakage is not a simple task, and this can be particularly detrimental when...
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Integrated geological study for reservoir modeling and characterization of the Shurijeh gas bearing sandstones in one of the Northeast Iran gas fields
June 2025
The sandstones deposited in the sequence of Shurijeh Formation comprise a giant gas reservoir in the Northeast of Iran. Five primary facies (petrofacies) were identified in the deposits of Shurijeh...
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Investigation of structural features of asphaltenes used for carbon materials synthesis by arc plasma treatment
June 2025
This study presents analysis of asphaltenes isolated from two crude oils: naphthenic-aromatic biodegraded oil and paraffin-naphthenic oil, which have been used as precursors for carbon materials synthesis....
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Contact form and angle of conical metal sealing in casing hangers: Influence on sealing performance
Available online 30 June 2025
To optimize the design and performance evaluation of conical metal seals for underwater casing hangers, we identified and analyzed the mechanisms by which forms of contact between the seals and hangers...
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Smart additives for fluid loss control in water-based drilling fluid: A review of recent developments
Available online 27 June 2025
Drilling fluids play a vital role in the success of oil and gas operations, ensuring cooling, lubrication, cuttings transport, and wellbore stability. Driven by environmental regulations, water-based...
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A quantification of the depositional–diagenetic heterogeneities in paleokarst hydrocarbon reservoirs: Sarvak Formation, Zagros Basin, Iran
Available online 26 June 2025
This study explores the depositional and diagenetic heterogeneities of the Sarvak Formation, a paleokarst carbonate reservoir in the Zagros Basin, Iran, using sedimentological, diagenetic, and statistical...
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DLVO-based prediction of critical pH for fines migration in sandstone reservoirs
Available online 10 June 2025
Fines migration is a formation damage mechanism that occurs in sandstone formations due to the incompatibility between injected fluids and in situ fluids during various operations such as water flooding,...
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Correlation-based EUR prediction of shale oil wells: A case of the Qingcheng Oil Field in the Ordos Basin
Available online 7 June 2025
Shale reservoirs are characterized by low permeability and a weak capacity for natural seepage. These reservoirs are commonly developed using a combination of horizontal well drilling and fracturing....
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Oil flow impact characteristics of internal floating roof tanks during floating roof landing and oil receiving processes
Available online 6 June 2025
To maintain the integrity of internal floating roof tanks, curb environmental pollution and guarantee the safety of tank farms, it is important to determine the oil flow features that impact the floating...
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Starch nanoprecipitation with ethanol for the formulation of ultralow salinity formation water-tapioca starch nanoparticles potentially for enhanced oil recovery application
Available online 4 June 2025
The present study evaluated commercial starch behavior and tapioca starch nanoparticles (TSNP) with 100 ppm ultralow salinity formation water as a potential alternative for enhanced oil recovery (EOR)....
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The role of thermophysical analysis in laboratory petrophysical core studies: An example from Saurashtra Basin rocks, India
Available online 31 May 2025
Evaluating the physical properties of rocks and their spatial variations is essential for understanding reservoir characteristics and developing reliable hydrodynamic or basin models. This paper summarizes...
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Potential cleaner and greener method for ultra-tight shale oil development without hydraulic fracturing: Experimental validation for CO2 and hydrocarbon gas injection
Available online 29 May 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...
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Numerical modeling validation of the sealability of bismuth alloy plugs
Available online 27 May 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...
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High-resolution sequence stratigraphic framework and target sand bodies correlation of tight oil reservoirs in the Upper Triassic Yanchang Formation, Ordos Basin
Available online 21 May 2025
In this study, we developed a high-resolution stratigraphic framework for the Yanchang Formation in the Huachi Block of the Qingyang Oilfield, located in the Ordos Basin, northwest China. Using well...
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Analysis of inter-well interference and well spacing optimization for horizontal wells in Gulong terrestrial pure shale oil
Available online 21 May 2025
Gulong shale has abundant oil resources with low-porosity and low-permeability reservoir characteristics, and effective development has been achieved using horizontal well volume fracturing in single-well...
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Mechanistic study on the effect of seepage force on fracture propagation behavior in multi-cluster fracturing of horizontal wells
Available online 21 May 2025
During multi-cluster fracturing of horizontal wells, low-viscosity fracturing fluid permeates extensively along the fracture walls into the rock pores, exerting seepage forces on the rock skeleton....
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The application of radio-frequency identification (RFID) technology in the petroleum engineering industry: Mixed review
Available online 16 May 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...
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Rock typing and causality analysis in unconventional formation using Bayes nets
Available online 7 May 2025
Unconventional formations are characterized by high heterogeneity and anisotropy, making it difficult to interpret logging data, perform core analysis, and create accurate petrophysical models. To address...
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Efficacy of functionalized MWCNT-based polymeric nanofluids for enhancing oil recovery in reservoirs
Available online 6 May 2025
Polymer-based enhanced oil recovery boosts production in depleted oil fields. However, harsh reservoir conditions, such as high salinity and temperature, often reduce its effectiveness. This study explores...
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Treatment of water disposal injection process by oilfield chemicals: Maintaining injectivity and environmental effects
Available online 5 May 2025
Oil production from hydrocarbon reservoirs is invariably accompanied by water production, which poses significant challenges to both production and injection systems, particularly due to the formation...
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