Dynamic Evaluation of Flow Unit Based on Reservoir Evolution: A Case Study of Neogene Guantao Ng3 Formation in M Area, Gudao, Bohai Bay Basin

Table 2

Statistics of reservoir characteristics in different periods.

Period	Porosity; (%)	Permeability; (×10^-3 μm^2)	Carbonate; (%)	Mud content; (%)	Oil saturation; (%)
Initial stage	32.3	1037	2.16	11.2	61.8
Medium high water cut period	33.6	1645	1.78	9.6	52.9
High water cut period	34.1	3512	1.27	6.97	45.4