... Abstract During polymer floods or surfactant-polymer floods, polymer molecules reside inside petroleum reservoirs for years. This extended period gives sufficient time for the polymers to react with the in-situ environment (high temperature, oxygen-free, high salinity) which could lead...

... water wet Hele-Shaw cell is used to visualize the dominant mechanisms of surfactant, polymer and their combinations to enhance heavy oil recovery. Waterfloods were conducted as a base line, and compared to surfactant, polymer and SP floods at different injection stages (secondary and tertiary) and under...

... Abstract A polymer flood pilot has been ongoing since September 2008 in Suriname in the heavy oil Tambaredjo field operated by Staatsolie. Initially, the pilot consisted of one injection well and four producers and was later expanded to three injection wells and nine direct offset production...

... this methodology to the Pelican Lake field in Alberta. We evaluated water flooding, polymer flooding, alkaline-surfactant-polymer (ASP) flooding, alkaline-co-solvent-polymer (ACP) flooding and polymer flooding followed by ASP flooding in laboratory tests. We executed new experiments including microemulsion phase...

...-branched polymer fracturing fluid in low-permeability heavy oil reservoirs. A hyper-branched polymer, which has numerous end groups and possesses a special highly branched three-dimensional spherical molecular structure, is characterized by Fourier Transform Infrared (FTIR) spectrophotometer. Laboratory...

... Abstract Three experiments have been performed, injecting brine and polymer into a sand pack saturated with heavy oil. Each experiment was imaged with time lapse X-ray CT. The first two experiments, conducted in a medical scanner with a resolution of 350 μm, suggested important features below...

...) at the reservoir temperature of 30°C. As expected, all the polymeric solutions exhibited pseudo-plastic behaviour, i.e., apparent viscosity decreases with increasing shear rate. To study the effect of surfactant SS-880 on polymer solution viscosity, the previous polymer solutions were augmented with addition...

... used in this research and all polymers were commercially available samples obtained in crystalline-powder form from SNF FLOERGER ® and listed in Table 1 . The commercial EOR polymer that has seen the most extensive use in the field is HPAM, which is a product of co-polymerization of acrylamide...

... at the laboratory scale. These pressure gradients evolve due to improved viscosity of polymer solutions, the formation of emulsions in surfactant or AS floods, or both. The objective of this work is to improve our understanding of the mechanisms by which heavy oils are produced through chemical flooding. Linear...

... Abstract Heavy oil reservoirs in western Canada with viscosities ranging from 1,000 cp to 10,000 cp are being exploited using chemical enhanced oil recovery techniques. The most widely used polymer in enhanced oil recovery applications is hydrolyzed polyacrylamide (HPAM). The primary reason...

... Abstract High molecular weight polyacrylamides are key components in oil recovery, particularly in the stimulation, production, and enhanced oil recovery of oil and gas wells. These polymers can be divided into three broad classes based on their physical state: dry polyacrylamides (DPAMs...

... Table 1 ). Table 1 Crude oils Reservoir/Pool Crude A Coreflood Temperature ( o C) 23 Dead Oil Viscosity at Reservoir Temperature & Atm. (mPa.s) 18700 HPAM (partially hydrolyzed polyacrylamide) samples and associative polymer samples were supplied by one...

... 1360 2530 45 45 48915 549 80076 Polymer: Flopaam 3630, a commercial HPAM polymer from SNF Floerger, was used as baseline to check the performance of the HMHEC polymers synthesized in this project. Oil: A western Canadian heavy oil with viscosity of 3600mPa.s at 20°C was used...

... interfacial tension (IFT) measurements, polymer viscosity measurements, wetting tendency measurements, and sandpack coreflood tests. The experimental results showed that the equilibrium interfacial tension between reservoir oil and formation brine could be lowered to an ultralow level (0.05 mN/m) by adding...