In this paper, the effects of carboxyl content, compositions of polymer and brine, and temperature on the flow properties of polymer solutions are discussed. Twenty kinds of partially hydrolyzed polyacrylamides were used as polymer samples. Brine which contained mono-valent (Na
+) or divalent (Ca
2+) were used.
The flow properties of polymer solutions such as apparent viscosity, screen factor, resistance factor and residual resistance factor were measured. The results are summarized as follows:
(1) Resistance factor, residual resistance factor, viscosity, and screen factor all increased with carboxyl content. This increase was much higher for solutions of low brine concentration than those of high brine concentration.
(2) A grater decrease in resistance factor and viscosity due to cation was observed in the COO
- polymer solutions compared to the COO
- & SO
3-.
(3) Resistance factor, viscosity and screen factor at 50°C decreased to 40-80% of those at 25°C.
(4) The addition of radical scavenger did to a limited extent, help control the heat deterioration of polymer.
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