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论述了在干燥和饱和两种情况下，岩石的有效体积模量于孔隙弹性模量的关系。孔隙弹性模量描述了孔隙对岩石等多孔材料的弹性性质的影响，利用其可导出在地震勘探和石油测井界应用很广的Ｇａｓｓａｍａｎｎ，该方程建立在线性弹性假设之上并仅限于低频范围。还阐述了有效压力的概念和计算方法。提出孔隙流体变化时岩石有效模量的计算，及利用孔隙弹性模量辨别储层中不同流体类型的计算方法。
The relationship between effective bulk modulus of rock and pore elastic modulus under dry and saturated conditions is discussed. Pore elastic modulus describes the effect of porosity on the elastic properties of porous materials such as rock and can be used to derive Gassamann, which is widely used in seismic exploration and oil well logging. The equation is based on linear elastic assumptions and is limited to the low frequency range . It also expounds the concept and calculation method of effective pressure. The calculation of effective modulus of rock when pore fluid changes and the calculation method of different fluid types in reservoir by pore elastic modulus are proposed.