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Preparation of a Novel Fracturing Fluid System with Excellent Elasticity and Low Friction.

Sciprofile linkYang Zhang, Sciprofile linkJincheng Mao, Sciprofile linkJinzhou Zhao, Sciprofile linkTao Xu, Sciprofile linkAnqi Du, Sciprofile linkZhaoyang Zhang, Sciprofile linkWenlong Zhang, Sciprofile linkShaoyun Ma
Published: 20 September 2019
 by  MDPI
Polymers , Volume 11; doi:10.3390/polym11101539

Abstract: The quaternary polymer was synthesized by radical polymerization and characterized by 1H NMR. The tests of critical associating concentration and SEM suggest that there is a multilayered and robust network structure in the polymer solution. An excellent elasticity in the polymer solution by the first normal stress difference, viscoelasticity, and thixotropy was observed. The critical crosslinker concentration of polymer with sodium dodecyl sulfate and its interaction mechanism were investigated. According to the reaction kinetics, the supramolecular structure had the lowest activation energy, stable network structure, and greater thermal stability. Then the polymer was employed in the fracturing fluid due to its excellent elasticity using the intermolecular forces, which showed superior sand suspension capacity by dynamic sand suspension measurement. Meanwhile, a theoretical analysis was proposed as to why polymer solution has excellent suspension and drag reduction properties. Therefore, this polymer could be an alternative in many fields, especially in fracking, which is significant for the development of oil and gas resources in deep wells.
Keywords: fracturing fluid / mechanism analysis / Thermodynamic property / hydrophobic associative water-soluble polymers / excellent elasticity and low friction

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