overburden pressure

The core testing results show that porosity and permeability of reservoir rocks decrease with the increase of net overburden pressure, and the fluctuation range of permeability is more than that of porosity.

黄骅坳陷北部南堡凹陷高柳地区明化镇组、馆陶组砂岩属疏松、固结程度较差的储集层 ,岩心实验结果表明 ,随着净上覆地层压力 (净覆压 )的增加 ,岩石的孔隙度、渗透率均不同程度地降低 ,并且渗透率的变化幅度远大于孔隙度。