Affiliation:
1. Ultimate EOR Services, LLC
Abstract
Abstract
The objective of this study was to test the performance of high-molecular weight polyethylene oxide (PEO) polymer in a low-permeability, oil-wet carbonate reservoir rock. Conventional HPAM polymers of similar molecular weight did not exhibit acceptable transport in the same rock, so PEO was explored as an alternative polymer. Viscosity, pressure drop across each section of the core, oil recovery, and polymer retention were measured. The PEO polymer showed good transport in the 23 mD reservoir carbonate core and reduced the residual saturation from 0.29 to 0.17. The reduction of residual oil saturation after polymer flooding using PEO was unexpected and potentially significant.
Reference17 articles.
1. Rheological Study of Poly(ethylene oxide) in Aqueous Salt Solutions at High Temperature and Pressure;Briscoe;Macromolecules,1996
2. Rheological properties of poly(ethylene oxide) in aqueous solutions;Briscoe;Journal of Applied Polymer Science,1998
3. On the effects of water solvency towards non--ionic polymers;Briscoe;Proceedings of the Royal Society of London. Series A: Mathematical, Physical and Engineering Sciences,1999
4. Flow of Polymer Solutions Through Porous Media;Dauben;Journal of Petroleum Technology,1967
5. POLYOX Water-Soluble Resins Dissolving Techniques {Brochure};Dow Chemical Company,2003