Determination of the power law exponent of polymer solution in condition of oil reservoir

On the basis of theoretical analysis and the statistics of actual production data, we find out the exponential relationship between the concentration of polymer solution and the distance to injection well. Combining the exponential relationship between the power law exponent and the concentration of polymer solution, we can get the expression to determine the power law exponent of polymer solution. Compared to trial method used in explanation of well testing, this method can save expanation time, it is feasible.