The result of the tests shows that the porosity and permeability decreases linearly as pressuredensity and pressure intensity increases.
试验结果表明:孔隙度和渗透率随压密压强的增大近似呈线性减小;
2
When the well reaches a pool, oil usually rises up the well because of its density difference with water beneath it or because of the pressure of expanding gas trapped above it.