Effective Propagation of HPAM Solutions Through the Tambaredjo Reservoir During a Polymer Flood

New sampling methods in Suriname’s Tambaredjo field revealed that HPAM polymers propagated more than 300 ft with no degradation, contrary to previous reports of significant loss. The polymer bank maintained low salinity and high viscosity. Shear-thickening behavior was observed, and polymers were injected above parting pressure, forming short fractures (~20 ft) that enhanced injectivity without harming sweep. Results suggest that past degradation reports may stem from oxygen exposure during sampling, not actual reservoir conditions. Using anaerobic sampling or radical-scavenger additives preserved viscosity.