higher polymer
2.The result indicates that displacement characteristics of unsheared polymer solution is better than the same viscosity polymer solution after sheared, the injection pressure of the unsheared polymer solution is higher than the same viscosity polymer solution after being sheared in the same permeability core , the lower the permeability, the bigger the molecule weight and the bigger the difference, as to the every layer of the secondary oil layer, it is feasible to displace oil with the polymer solution after sheared, and the EOR of the polymer flooding can increase more than 9.84%.
10.It is revealed by the property determination that the glass transition temperature (Tg) is increased and enthalpy (AHf) is decreased as the nanosized Al2O3 is added to the PEEK. The higher strengths in tension, compression, bending and impact are also achieved in the nano Al2O3 contained polymer in comparison with the unfilled PEEK.

