Combined with the oil-water relative permeability of the above cores,they also determine the upper limits of the commercial production of T3x4 gas reservoir in CZCX,H8 gas reservoir in WODS and Js4 oil reservoir in CZNC to be 55%,52% and 50%,respectively.

Simulation study on the effect of the microscopic parameters of reservoir pore structure on oil-water relative permeability;

Eigen curve of relative permeability and its application;

Application of the relative permeability analytical technique in the interpretation and evaluation for Puxi region;

The relation curves of water phase permeability of reservoir cores and back-pressure were obtained.

The coal core flow tests are conducted in following steps: injecting 5 g/L salt water to measure water phase permeability,K_w;injecting in opposite direction N_2 gas to measure gas phase permeability,K_g,changing with time,t;injecting 2 g/L surfactant solution in the salt water and measuring K′_w;injecting in opposite direction N_2 gas to measure K′_g,changing with t;the water phase .

The coal core flow tests are conducted in following steps: injecting 5 g/L salt water to measure water phase permeability,K_w;injecting in opposite direction N_2 gas to measure gas phase permeability,K_g,changing with time,t;injecting 2 g/L surfactant solution in the salt water and measuring K′_w;injecting in opposite direction N_2 gas to measure K′_g,changing with t;the water phase .