Solution properties of sidechain polymers for enhanced oil recovery

(1994) Solution properties of sidechain polymers for enhanced oil recovery. Masters thesis, King Fahd University of Petroleum and Minerals.


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In this study, three clases of amphiphilic sidechain polymers are synthesized or modified, with the objective of investigating their rheological behaviour and surface and interfacial acivities for enhanced oil recovery applications. The polymers considered are, cyclopolymer of diallyl quaternary ammonium salt, copolymers of maleic anhydridel/1-alkene and hydrophobically modified polyvinylalcohol (PVA). The rheological behaviour and surface and interfacial activities of these polymers are studied with respect to the polymers concentration, temperature, salinity, shear rate, polymers molecular weight and time. The viscosity of the diallyl quaternary ammonium chloride cyclopolymer and the maleic anhydride/1-alkene copolymers is characteristically low, up to high polymer concentrations. However, the solution viscosity of the hydrophobically modified PVA is found relatively high at moderate polymer concentrations. Furthermore, the aqueous solution of the cyclopolymer and the copolymers exhibit low salt tolerance, typical of polyelectrolyte polymers, in the range of 0-1.0wr% NaC1 concentrations. On the other hand, the hydrophobically modified PVA exhibits a relatively high salt tolerance, typical of non-ionic polymers, in the range of 0-7.0wt% NaC1 concentrations. Moreover, good surface and interfacial activities, including low surface and intefacial tensions are exhibited by all the three classes of polymers considered in this work. It is also found that adding NaC1to the copolymers and the hydrophobically modified PVA in aqueous solution increases their surface and interfacial activities. The viscosity of the hydrophobically modified PVA and the copolymers have been found to be relatively invariant with NaC1 above 3.0wt% and 0.1wt% NaC1 concentrations respectively. The hydrophobically modified PVA with high molecular weight exhibits a greater thickening ability and higher surface and interfacial activities than the one with low molecular weight. A sligh decrease in viscosity is also exhibited by the modified polymer with time. Generally, the three classes of polymers considered in this work exhibit an almost constant viscosity at high shear rates and a typical shear thinning behaviour at low shear rates. In addition, increasing polymer concentration leads to an increase in the polymer solution viscosity and decrease in surface and interfacial tensions. Moreover, the polymers exhibit smaller solution viscosity at high temperature.

Item Type: Thesis (Masters)
Subjects: Chemical Engineering
Department: College of Chemicals and Materials > Chemical Engineering
Committee Advisor: Hamad, Esam Z.
Committee Members: Ali, Shaikh Asrof and Beg, Shafkat A. and Al-Naafa, M. A.
Depositing User: Mr. Admin Admin
Date Deposited: 22 Jun 2008 14:00
Last Modified: 01 Nov 2019 13:58