2017
DOI: 10.1021/acs.energyfuels.6b02653
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Comparative Studies on Enhanced Oil Recovery: Thermoviscosifying Polymer Versus Polyacrylamide

Abstract: High-molecular-weight polyacrylamide (PAM) has been widely used in chemically enhanced oil recovery (EOR) processes under mild conditions, but its poor tolerance to high temperature and high salinity impeded the use in severe oil reservoirs. To overcome the inadequacies of PAM, thermoviscosifying polymers (TVPs) whose viscosity increases upon increasing temperature and salinity were developed in recent years. In this work, comparative studies with PAM and TVP, having more similar molecular weights, were perfor… Show more

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Cited by 116 publications
(104 citation statements)
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“…The viscosity of the displacing fluid is a necessary criterion for screening an injection fluid during chemical flooding, because an optimal viscosity of the displacing fluid is required to ensure favourable mobility so as to achieve better oil recovery with good injectivity at lower cost 1 . The viscous behaviour of PAM at different temperatures and salinities was measured in terms of its thermal stability, where the estimation detected two types of rheological behaviour: thixotropic and pseudo-plastic.…”
Section: Rheological Characterization Of Pammentioning
confidence: 99%
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“…The viscosity of the displacing fluid is a necessary criterion for screening an injection fluid during chemical flooding, because an optimal viscosity of the displacing fluid is required to ensure favourable mobility so as to achieve better oil recovery with good injectivity at lower cost 1 . The viscous behaviour of PAM at different temperatures and salinities was measured in terms of its thermal stability, where the estimation detected two types of rheological behaviour: thixotropic and pseudo-plastic.…”
Section: Rheological Characterization Of Pammentioning
confidence: 99%
“…Conventional methods of oil production yield about one-third of the oil initially in place in a given reservoir and the remaining oil, representing almost two-thirds of the oil in place, is an attractive target for the application of EOR methods [1].…”
Section: Introductionmentioning
confidence: 99%
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“…Partially hydrolyzed polyacrylamide (HPAM) is a water‐soluble polymer widely employed in many areas of industry, such as water treatment, drilling fluids, and enhanced oil recovery (EOR) . In particular, HPAM is the most applied polymer in EOR to increase the viscosity of the water, improving the oil displacement efficiency . However, due to the charges in the chain (COO − groups), this polymer is extremely sensitive to high ionic strength of the reservoir, which can cause phase separation followed by precipitation .…”
Section: Introductionmentioning
confidence: 99%
“…The co-polymers investigated in this study were FLOCOMB, an anionic post-HPAM [18] with increased molecular weight and polydispersity [19,20], AN132 VHM, a sulfonated polyacrylamide copolymer with a sulfonation degree of 32 mol % and a high molecular weight [19,21,22] SUPERPUSHER SAV55, having a functional groups that are similar to AN132 VHM, but with a higher degree of sulfonation [21] and THERMOASSOCIATIF, a copolymer showing thermo thickening behavior [21,23,24].…”
Section: Introductionmentioning
confidence: 99%