Preparation of the Novel Hydrophobically Modified Polyacrylmide Nanostructures as Flooding Agent in EOR
M. Shaban, Y. Tamsilian, A. Ramazani and M.M. Ahadian
Event name: 77th EAGE Conference and Exhibition 2015
Session: Enhanced Oil Recovery
Publication date: 01 June 2015
Info: Extended abstract, PDF ( 2.11Mb )
Price: € 20
In this work novel HMPAM nanostructures have been synthesized using a one-step modified inverse miniemulsion polymerization to control mobility ratio in oil reservoirs and overcome weakness and limitations of classical polymer flooding. The incorporation of the hydrophobic co-monomer into the hydrophilic polymer backbone was confirmed by 1H NMR, FT-IR and fluorescence spectroscopy. Dynamic light scattering (DLS) and the Field Emission Scanning Electron Microscope (FE-SEM) confirm that rather uniform and well defined spherical particles having diameter of about 60 nm were obtained. Intrinsic viscosity and molecular weight of the final copolymers were determined by Ubbelohde capillary viscometry method. According to viscosity measurements, increasing the hydrophobe content up to 10 mol% make an enhancement in viscosity of HMPAM copolymers, which become more pronounced at a critical concentration of copolymer in water. The results show that solution viscosity of the produced copolymers in presence of salt increases, which could make them excellent candidates for polymer flooding applications. These properties make the polymer very promising in enhanced oil recovery applications in wells of high salinity where copolymer solutions with low viscosity can be initially pumped to lower the cost of pumping. Subsequently, viscofication can take place inside the well in the presence of salt.