Preprint Article Version 1 Preserved in Portico This version is not peer-reviewed

Experimental Investigation of Polymer Reinjection in Long Conduits for Material Sustainability and Cost Reduction of Enhanced Oil Recovery

Version 1 : Received: 18 May 2023 / Approved: 18 May 2023 / Online: 18 May 2023 (08:39:03 CEST)

How to cite: Fakher, S.; Khlaifat, A. L. Experimental Investigation of Polymer Reinjection in Long Conduits for Material Sustainability and Cost Reduction of Enhanced Oil Recovery. Preprints 2023, 2023051303. https://doi.org/10.20944/preprints202305.1303.v1 Fakher, S.; Khlaifat, A. L. Experimental Investigation of Polymer Reinjection in Long Conduits for Material Sustainability and Cost Reduction of Enhanced Oil Recovery. Preprints 2023, 2023051303. https://doi.org/10.20944/preprints202305.1303.v1

Abstract

Polymers are one of the most widely used chemicals in the oil and gas industry. They are used for mobility control in enhanced oil recovery, in conformance control as a crosslinked plugging agent, as a fracking fluid for fracture propagation and proppant transportation, and in drilling fluids as an additive for drilling mud enhancement. In the majority of its applications in the petroleum industry, the polymer needs to be injected under high pressures and temperatures. This can impact the polymer structure significantly and compromises the possibility of reusing the injected polymer for cost reduction and material sustainability. This research characterizes the polymer injectivity in different pore sizes under different conditions and evaluates the polymer conditions after injection. Based on this, the ability to reinject the polymer in the porous media is discussed. The factors studied include the pore size, the polymer concentration, the polymer injection flowrate, and polymer injectivity. Results showed that the polymer usually undergoes four main degradations during injection including dehydration, syneresis, shearing, and excessive hydrolysis. The experimental results showed that one or more of the polymer degradations resulted in the inability to reinject the polymer in most cases.

Keywords

Polymer Reinjection; Material Sustainability; Polymer Transport in Porous Media; Polymer Degradation; Enhanced Oil Recovery

Subject

Chemistry and Materials Science, Polymers and Plastics

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