中文摘要：

为了研究砂岩储层孔隙度、渗透率、压缩系数与压力的关系以及压缩系数与孔隙度的关系，选取东营凹陷6个砂岩样品进行了增压减压实验，结果表明：砂岩孔隙度和渗透率随压力的升高而降低，随压力的降低而升高，但不会恢复到原始孔隙度和渗透率水平。低渗透储层比中高渗透储层具有更好的应力敏感性，但是降压后其渗透率恢复能力却不如中高渗透储层。砂岩的孔隙体积压缩系数随着压力的增大而降低，孔隙体积回弹系数随着压力的降低而增大，并且压缩系数随着孔隙度的增大而增大，随孔隙度的降低而降低，岩石压缩系数与孔隙度之间的关系呈二次多项式，该公式对东营凹陷油藏工程研究具有一定的指导意义。

英文摘要：

In this paper,we selected six sandstone samples in Dongying Sag to carry out pressure change ex- periment to study the sandstone reservoir porosity, permeability, compression coefficient and pressure re- lationship and the relationship between compression coefficient and porosity. The results show that the po- rosity and permeability of the sandstone decrease with increasing pressure and increase with decreasing pressure,but cannot return to the original porosity and permeability. Low permeability reservoirs have bet- ter stress sensitivity than in permeability reservoirs. However, its permeability recovery is not as good as permeability reservoirs with decreasing pressure. Sandstone pore volume compressibility decreases with in- creasing pressure, and pore volume rebound coefficient increases with decreasing pressure. The compressi- bility coefficient increases with increasing porosity and decreases with decreasing porosity. The relationship between rock compressibility coefficient and porosity is as quadratic polynomial, and the formula has some significance in reservoir engineering study for the Dongying Sag.