THE EFFECT OF EFFECTIVE PRESSURE ON POROSITY AND PERMIEABILITY OF LOW PERMEABILITY POROUS MEDIA

On the basis of experimental study,the law of porosity and permeability versus effective pressure are developed, Because porosity of low permeability media is very small, a little change of its porosity can make its permeability decline rapidly. The paper is useful in solid-fluid coupled simulation of oil reservoir. The paper gives coupled relations in solid-fluid coupled simulation. During the oil and gas field developing,the coupled effect should be considered.