Abstract: A ground water table reservoir is formed by complex processes of multiple geologic factors.Comparing with conventional reservoirs, this kind of reservoir is characterized by dynamic migration, energy-free, high porosity and permeability, high oil column, enormous geologic reserves, and oil varying from heavy to light.In consequent structural and deposit evolution, it tends to shape heavy oil-sealing reservoir with highly hidden nature.Qiketai reservoir in Tuha basin is a typical ground water table reservoir.In analog basins in geologic conditions, there should be similar reservoirs.For the enormous geologic reserves that normally occur, this reservoir has high value for exploration.

Key words: ground water table reservoir, special reservoir, reservoir feature, high porosity, high permeability, heavy oil-sealing reservoir