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Polymer Classification: Architecture

Polymer Classification: Architecture

Polymers are classified as linear or branched on the basis of their chain architecture. The polymer chains in linear polymers have a long chain-like structure with minimal to no branching at all. Even if a polymer features large substituent groups on the monomer, which appear as branches to the skeleton, it is not considered a branched polymer. A branched polymer contains secondary polymer chains that arise from the main polymer chain. The branching occurs when the polymer growth shifts from...

Radical Chain-Growth Polymerization: Chain Branching

Radical Chain-Growth Polymerization: Chain Branching

The skeletal structure of polymers synthesized via radical polymerization is always branched. For example, the polymerization of ethylene by radical polymerization results in a low-density grade of polyethylene with a heavily branched skeletal structure. Here, the radical site abstracts hydrogen from the growing chain, and the radical site shifts from the end (a primary carbon center) to anywhere within the growing chain (a secondary carbon center). Consequently, the part of the chain from the...

Types of Fluids

Types of Fluids

Fluids can be classified into Newtonian and non-Newtonian fluids based on their response to shear stress. Newtonian fluids have a linear relationship between shear stress and the shear strain rate, following Newton's law of viscosity. Their viscosity remains constant regardless of the shear rate, making their behavior predictable and easier to analyze. Common examples include water, air, oil, and gasoline.
In contrast, non-Newtonian fluids do not follow Newton's law of viscosity, and...

Polymer Classification: Crystallinity

Polymer Classification: Crystallinity

Unlike ionic or small covalent molecules, polymers do not form crystalline solids due to the diffusion limitations of their long-chain structures. However, polymers contain microscopic crystalline domains separated by amorphous domains.
Crystalline domains are the regions where polymer chains are aligned in an orderly manner and held together in proximity by intermolecular forces. For example, chains in the crystalline domains of polyethylene and nylon are bound together by van der Waals...

Characteristics of Fluids

Characteristics of Fluids

Fluids differ from solids primarily in their molecular structure and stress response. Solids have tightly packed molecules with strong intermolecular forces, maintaining their shape and resisting deformation. In contrast, fluids have molecules spaced farther apart with weaker forces, allowing them to flow and deform easily.
Fluids, which include both liquids and gases, are substances that deform continuously under shearing stress. For example, water and oil are liquids with molecules that can...

Application of Pascal's Law

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Pascal's experimentally proven observations—that a change in pressure applied to an enclosed fluid is transmitted undiminished throughout the fluid and to the walls of its container—provide the foundations for hydraulics, one of the most important developments in modern mechanical technology.
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Microfluidic Fabrication Techniques for High-Pressure Testing of Microscale Supercritical CO2 Foam Transport in Fractured Unconventional Reservoirs

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Application of Polymers in Hydraulic Fracturing Fluids: A Review.

Amro Othman¹, Murtada Saleh Aljawad^1,2, Rajendra Kalgaonkar³

¹Center for Integrative Petroleum Research, College of Petroleum Engineering and Geosciences, King Fahd University of Petroleum and Minerals, Dhahran 31261, Saudi Arabia.

|September 27, 2025

Summary

This review covers polymers in hydraulic fracturing fluids, detailing their role in viscosity, proppant transport, and degradation. It highlights polymer impact on formation damage and environmental concerns, offering selection guidance.

Keywords:

breaking crosslinking environmental impact formation damage fracturing fluids hydration polymers

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Area of Science:

Petroleum Engineering
Polymer Science
Environmental Science

Background:

Hydraulic fracturing is crucial for oil and gas production.
Fracturing fluids, primarily polymers, provide viscosity and proppant transport.
Effective polymer selection and management are vital to prevent formation damage and environmental issues.

Purpose of the Study:

To review polymers used in hydraulic fracturing treatments.
To analyze polymer classifications, preparation, mechanisms, and degradation.
To assess polymer interactions, formation damage impact, and environmental concerns.

Main Methods:

Literature review of polymers in fracturing fluids.
Analysis of polymer properties, degradation, and additive interactions.
Examination of formation damage mechanisms and environmental impacts.

Main Results:

Polymers are key to fracturing fluid viscosity and proppant suspension.
Polymer behavior significantly influences formation damage types (e.g., wettability alteration).
Cost-effective and robust polymer selection is critical for operational success.

Conclusions:

Understanding polymer behavior is essential for designing effective fracturing fluids.
Careful polymer selection minimizes formation damage and environmental risks.
This review provides knowledge for tailored fracturing fluid design across various scenarios.