Characterization and selection of polymer for use in future research on improved oil recovery

Abstract

Polymer flooding has been applied for petroleum recovery and the main results of this method are the effective increasing in oil production and the reduction of water circulation The objective of this work is to present a methodology for pre-selecting a polymer to be used in future research on enhanced oil recovery (EOR) by injecting polymer solution. A reservoir was selected and characterized. Seven samples of commercial partially hydrolyzed polyacrylamide (PHPA) were also selected and characterized. Polymer solutions were prepared and characterized in terms of filterability, viscosity, stability (under reservoir conditions) and mechanical degradation. Polymer-reservoir interaction was also investigated. The results showed that it is very useful to establish a methodology to pre-select the more suitable polymer for fluid injection operations in oil field. Besides, for the conditions used in this study, the best polymer presents hydrolysis degree of 30%, molar mass of 5106 and intrinsic viscosity of 10 ml/g.

Porous polymer oil sorbents based on PET fibers with crosslinked copolymer coatings

“…4 Such sorbents are typically made of polymers, while polymers also have other applications in the petroleum industry. [5][6][7][8] We have tested the capability to absorb petroleum as well as toluene; toluene has the advantage of being a good solvent for asphaltenes which are contained in crude oil. 9 These facts are the starting point for the present work, plus the nding of Kim and coworkers 10 that non-woven polyethylene terephthalate (NWPET) based sorbents might be useful for oil-spill recovery in marine environments, but only aer modication with hydrophobic polymers.…”

Modelos rápidos de simulação aplicados à Injeção de polímeros em reservatórios heterogêneos

“…LEONHARDT; AZRI, 2015). No Brasil, os campos terrestres de Carmópolis/SE, Buracica/BA e Canto do Amaro/RN foram casos de sucesso para a aplicação desta técnica com resultados positivos com relação ao aumento da recuperação de óleo (DE MELO et al, 2005;LUCAS, 2008). Nicodemos, Araujo e Rocha (2013) já preveem a injeção de polímeros no campo de Papa Terra/RJ no projeto de desenvolvimento do campo marítimo.…”

“…Tipos de polímerosAlém da seleção criteriosa do reservatório, a escolha do polímero é fundamental para o sucesso do projeto de recuperação avançada. Definir o polímero de forma cuidadosa evita interações indesejadas como reações químicas com a rocha e o óleo, interações com a água injetada e de formação, e garante a estabilidade em condições de reservatório (MELO;LUCAS, 2008;MOREL;LABASTIE;NAHAS, 2007). Existem dois tipos polímeros mais utilizados em projetos de recuperação avançada: biopolímeros xantana e poliacrilamida parcialmente hidrolisada.Biopolímeros xantana são produzidos a partir de microrganismos Xanthomonas campestris e este polímero produz cadeias com propriedades relativamente pouco diferentes, porém gerando diferenças nas estruturas moleculares.…”

Surfactant-polymer flooding in sandstones evaluated by computed tomography

“…The polymer selected was the Synthetic HPAM, Flopaam 3230S from SNF Floerger with a molecular weight (Mw) of 5 x 10 6 [g/mol], 30% degree of hydrolysis, water content less than 1%, thermal stability up to 160 ºC (MELO;LUCAS, 2008). Besides that, the Sodium dodecyl sulfate (SDS) from LabSynth with Mw of 288.373 [g/mol] and a purity of 99.23% was selected as a surfactant.…”

“…As the Na+ content increases, the ionic strength due to electrostatic repulsion among the anions is shielded raising the flexibility and diminishing the hydrodynamic radius, while the double electrical layers on the polymer molecular chains are compressed (SAMANTA et al, 2010;SHENG, 2011;SORBIE, 2013). On the other hand, the divalent cations (Ca +2 , Mg +2 )interact with the polymer negative loads, neutralizing the effect of the molecular expansion (MELO et al, 2002;MELO;LUCAS, 2008).…”