| Popis: |
Nanotechnology has shown enormous progress in the petroleum industry especially in the area of Enhanced Oil Recovery. However, field experience has shown that the major challenge facing polymer flooding is polymer degradation under reservoir conditions such as high temperature and high salinity. Though Partially hydrolysed polyacrylamide (HPAM) is the current widely used polymer, it is also very sensitive to salinity, shear, thermal degradation due hydrolysis of polyacrylamide introduced as a result of negative charges on the backbones of polymer chains which in turn causes an alteration on the rheological properties of the polymer solution. The rheological behaviour for different solutions of Guar gum and Gum Arabic containing different salt was evaluated to study the effect of nanoclay and other additives on the stability of these biopolymers. The viscosity of these polymer solutions was measured using a rheometer and in each measurement, the shear rate was changed, and the effect of this change on the viscosity was measured. Results showed improved stability at different range of salinity and level of concentration of the polymers. |
