Rapid polymer screening calculations

In an analogous manner to waterflood evaluation, the following levels of approximate calculation are possible for assessing potential polymer floods  

There is probably sufficient data on field polymer flooding to set up a statistical database of the various reservoir parameters which best correlate with the efficiency of the process. However, to the author s knowledge, no such compilation has been published although the same general field experience has been broadly incorporated into the reservoir screening rules for polymer flood application discussed previously. The simple analytical methods that 

---

Electrostatic repulsion of the anionic carboxylate groups elongates the polymer chain of partially hydrolyzed polyacrylamides increasing the hydrodynamic volume and solution viscosity. The extensional viscosity is responsible for increased resistance to flow at rapid flow rates in high permeability zones (313). The screen factor is primarily a measure of the extensional (elonga-tional) viscosity (314). The solution properties of polyacrylamides have been studied as a function of NaCl concentra-tion and the parameters of the Mark-Houwink-Sakaruda equation calculated... 

---