Study on Relation between Hydrodynamic Feature Size of HPAM and Pore Size of Reservoir Rock in Daqing Oilfield

Table 2

The result of the flow pressure gradient of different parameter polymer solution in different permeability cores (MPa/m).

MW, 10^4	, mg/L	150 × 10^−3 µm^2		200 × 10^−3 µm^2		300 × 10^−3 µm^2		600 × 10^−3 µm^2		900 × 10^−3 µm^2
		Clear water	Sewage	Clear water	Sewage	Clear water	Sewage	Clear water	Sewage	Clear water	Sewage
800	1000	0.053	0.044	0.032	0.032	0.02	0.02	0.01	0.01	0.01	0.01
1500	500	0.059	0.053	0.049	0.032	0.035	0.02	0.01	0.01	0.01	0.01
	1000	0.065	0.061	0.054	0.049	0.04	0.032	0.014	0.012	0.014	0.012
	1500	0.12	0.089	0.074	0.062	0.053	0.043	0.032	0.023	0.021	0.013
	2000	0.13	0.116	0.078	0.074	0.058	0.053	0.039	0.033	0.024	0.013
	2500	0.157	0.12	0.09	0.094	0.068	0.069	0.045	0.04	0.034	0.021
1700	1000	0.07	0.065	0.06	0.052	0.047	0.036	0.017	0.019	0.013	0.013
2500	1000	0.078	0.072	0.072	0.058	0.062	0.043	0.034	0.032	0.013	0.014