Studying the heat resistance of hydrophilic-hydrophobic polymer used in enhancing oil recovery
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https://doi.org/10.54939/1859-1043.j.mst.FEE.2023.251-255Keywords:
Polymer injection technology; Polyacrylamide; Hydrophilic - hydrophobic polymer; Heat resistant; EOR.Abstract
Hydrophobically associating polyacrylamide (HAP) polymers differ from traditional water-soluble polymers (hydrolysis polyacrylamides (HPAM) in that they are partially composed of hydrophobic monomers on the HAP chain, which are capable of forming physical bond in the form of micelles in aqueous solution. This structure imparts distinct rheological and adsorption properties to HAP, making them outstanding in enhanced oil recovery (EOR) applications. Experimental results indicate that, at low concentrations, the hydrophilic-hydrophobic polymer solution significantly improves oil recovery, with more stable profile shifts and better scanning efficiency than conventional polymers at the same concentration. The main attractions of these hydrophilic polymers are their ability to significantly increase viscosity compared to conventional polymers and their ability to maintain viscosity under high-temperature operating conditions. In this paper, the authors investigated the thermal stability (heat resistance) of the hydrophilic-hydrophobic polymer through the property of the viscosity of the solution when tested at high temperatures, thereby confirming the ability to use polymers synthesized in the laboratory of the Institute of Chemistry-Materials, the Military Academy of Science and Technology in injection technology to enhance oil recovery in the condition of the lower Miocene formation of oil fields on the continental shelf of Vietnam.
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