含油气储层都是由固体颗粒的骨架、孔隙及其充填流体所组成的多相介质，含油气储层的物性在油气勘探中所起的作用不容忽视。为了研究孔隙形状对AVO 响应的影响，文中选取两层砂泥岩模型，按照不同孔隙形状来讨论砂岩的孔隙。首先利用Kuster-Toksoz 公式求得岩石的等效模量， 再利用Biot-Gassmann 方程进行流体替换以求得饱含流体岩石的等效模量，最后利用Aki-Richards 公式求取反射系数进行AVO 正演模拟。结果显示孔隙形状对岩石的AVO 响应有明显的影响，并且对饱含不同类型流体岩
石的AVO 响应的影响规律都是相似的。

Reservoirs are multiphase medium composed by the matrixs of solid, pore and the fluid in the pore. The properties of the pore should not be overlooked in oil and gas exploration. In orderto analyze the influence of pore shape on AVO response, two sets of sand shale model are selected to classify the pores by the pore shape. The equivalent modulus of rock is obtained by using Kuster- Toksoz formula, and then Biot- Gassmann equation is applied for fluid substitution to obtain the equivalent modulus of saturated rock. Finally the reflection coefficient obtained by Aki- Richards formula is used to carry out the AVO forward modeling. The result shows that the pore shape has significant effects on AVO response, and the influence onAVOresponse of different types of fluid-saturated rocks is similar.