Entropy–Percolation Coupling as the Hidden Law of Drilling-Fluid Behaviour.
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| Title: | Entropy–Percolation Coupling as the Hidden Law of Drilling-Fluid Behaviour. |
|---|---|
| Authors: | Rasool, Muhammad Hammad1,2,3 (AUTHOR) Hammad.rasool@utp.edu.my |
| Source: | Arabian Journal for Science & Engineering (Springer Science & Business Media B.V. ). Jun2026, Vol. 51 Issue 12, p15459-15480. 22p. |
| Subjects: | Drilling fluids, Thermodynamics, Water filtration, Shear (Mechanics), Dimensionless numbers, Percolation theory, Microstructure |
| Abstract: | Conventional rheological models describe how drilling fluids respond to shear but do not explain why their properties emerge from molecular interactions. This study introduces a novel Entropy-Regulated Percolation (ERP) (interpretive) conceptual framework; a first-principles theory linking thermodynamics, microstructure, and drilling fluid behaviour. ERP treats rheology and filtration as outcomes of a single entropy–energy balance that governs reversible bond networks. Two new dimensionless parameters are introduced: the entropy–power ratio (Ψ), capturing the balance between structural reorganization and shear energy input, and the bond-lifetime number (Λ), describing how long mud-network bonds endure relative to the deformation timescale. Together, Ψ and Λ form a universal map that classifies drilling fluids as shear-dominated, balanced, or network-dominated. In addition to the engineering-level quantitative interpretation of the ERP framework, a citric acid:glycerine NADES-based drilling fluid study is re-examined as a conceptual case study showing that its position near the balanced-to-network regime explains its stable viscosity, reversible thixotropy, and low permeability. By connecting bond free energy (ΔGb), bond lifetime (τb), and structural order (Ω) to measurable flow and filtration data, ERP provides a thermodynamic interpretive framework that rationalizes empirical rheological and filtration behaviour. The framework shifts drilling-fluid design toward an interpretive, physics-based approach, unifying chemistry, structure, and performance. [ABSTRACT FROM AUTHOR] |
| Copyright of Arabian Journal for Science & Engineering (Springer Science & Business Media B.V. ) is the property of Springer Nature and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.) | |
| Database: | Engineering Source |
| FullText | Text: Availability: 0 |
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| Header | DbId: egs DbLabel: Engineering Source An: 194774474 AccessLevel: 6 PubType: Academic Journal PubTypeId: academicJournal PreciseRelevancyScore: 0 |
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| Items | – Name: Title Label: Title Group: Ti Data: Entropy–Percolation Coupling as the Hidden Law of Drilling-Fluid Behaviour. – Name: Author Label: Authors Group: Au Data: <searchLink fieldCode="AR" term="%22Rasool%2C+Muhammad+Hammad%22">Rasool, Muhammad Hammad</searchLink><relatesTo>1,2,3</relatesTo> (AUTHOR)<i> Hammad.rasool@utp.edu.my</i> – Name: TitleSource Label: Source Group: Src Data: <searchLink fieldCode="JN" term="%22Arabian+Journal+for+Science+%26+Engineering+%28Springer+Science+%26+Business+Media+B%2EV%2E+%29%22">Arabian Journal for Science & Engineering (Springer Science & Business Media B.V. )</searchLink>. Jun2026, Vol. 51 Issue 12, p15459-15480. 22p. – Name: Subject Label: Subjects Group: Su Data: <searchLink fieldCode="DE" term="%22Drilling+fluids%22">Drilling fluids</searchLink><br /><searchLink fieldCode="DE" term="%22Thermodynamics%22">Thermodynamics</searchLink><br /><searchLink fieldCode="DE" term="%22Water+filtration%22">Water filtration</searchLink><br /><searchLink fieldCode="DE" term="%22Shear+%28Mechanics%29%22">Shear (Mechanics)</searchLink><br /><searchLink fieldCode="DE" term="%22Dimensionless+numbers%22">Dimensionless numbers</searchLink><br /><searchLink fieldCode="DE" term="%22Percolation+theory%22">Percolation theory</searchLink><br /><searchLink fieldCode="DE" term="%22Microstructure%22">Microstructure</searchLink> – Name: Abstract Label: Abstract Group: Ab Data: Conventional rheological models describe how drilling fluids respond to shear but do not explain why their properties emerge from molecular interactions. This study introduces a novel Entropy-Regulated Percolation (ERP) (interpretive) conceptual framework; a first-principles theory linking thermodynamics, microstructure, and drilling fluid behaviour. ERP treats rheology and filtration as outcomes of a single entropy–energy balance that governs reversible bond networks. Two new dimensionless parameters are introduced: the entropy–power ratio (Ψ), capturing the balance between structural reorganization and shear energy input, and the bond-lifetime number (Λ), describing how long mud-network bonds endure relative to the deformation timescale. Together, Ψ and Λ form a universal map that classifies drilling fluids as shear-dominated, balanced, or network-dominated. In addition to the engineering-level quantitative interpretation of the ERP framework, a citric acid:glycerine NADES-based drilling fluid study is re-examined as a conceptual case study showing that its position near the balanced-to-network regime explains its stable viscosity, reversible thixotropy, and low permeability. By connecting bond free energy (ΔGb), bond lifetime (τb), and structural order (Ω) to measurable flow and filtration data, ERP provides a thermodynamic interpretive framework that rationalizes empirical rheological and filtration behaviour. The framework shifts drilling-fluid design toward an interpretive, physics-based approach, unifying chemistry, structure, and performance. [ABSTRACT FROM AUTHOR] – Name: AbstractSuppliedCopyright Label: Group: Ab Data: <i>Copyright of Arabian Journal for Science & Engineering (Springer Science & Business Media B.V. ) is the property of Springer Nature and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.) |
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| RecordInfo | BibRecord: BibEntity: Identifiers: – Type: doi Value: 10.1007/s13369-026-11207-z Languages: – Code: eng Text: English PhysicalDescription: Pagination: PageCount: 22 StartPage: 15459 Subjects: – SubjectFull: Drilling fluids Type: general – SubjectFull: Thermodynamics Type: general – SubjectFull: Water filtration Type: general – SubjectFull: Shear (Mechanics) Type: general – SubjectFull: Dimensionless numbers Type: general – SubjectFull: Percolation theory Type: general – SubjectFull: Microstructure Type: general Titles: – TitleFull: Entropy–Percolation Coupling as the Hidden Law of Drilling-Fluid Behaviour. Type: main BibRelationships: HasContributorRelationships: – PersonEntity: Name: NameFull: Rasool, Muhammad Hammad IsPartOfRelationships: – BibEntity: Dates: – D: 15 M: 06 Text: Jun2026 Type: published Y: 2026 Identifiers: – Type: issn-print Value: 2193567X Numbering: – Type: volume Value: 51 – Type: issue Value: 12 Titles: – TitleFull: Arabian Journal for Science & Engineering (Springer Science & Business Media B.V. ) Type: main |
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