孔洞储层地震波特征响应的物理模型实验研究

根据物理模型相似性原则制作了不同材料和不同孔洞密度的物理模型，在常温常压和温压条件下分别测试了孔洞模型的地震波特征响应，分析了孔洞储层特征的变化对地震波属性参数的影响。孔洞密度、围压、温度、模型材料和含流体的变化对地震波的速度、振幅、衰减、主频和主振幅等属性参数均有明显的影响。温压等条件的不同，孔洞密度引起的地震波特征响应程度不同。实验表明，孔洞密度的变化对地震波动力学特征参数(振幅、衰减等)的影响远远大于对运动学特征(速度等)的影响，这为利用地震波的振幅、衰减等属性参数进行储层中孔洞分布和发育程度的检测提供了可靠的实验基础。

SEISMIC RESPONSES TO PORE-HOLE RESERVOIR BY PHYSICAL MODELING

According to physical modeling similarity theory, different materials and pore-hole density (physical) models were made. Seismic responses to pore-hole physical models made of different materials and pore-hole density and under different pressure and temperature conditions were measured using MTS(a rock Mechanics Test System). The authors analyse the influences of pore-hole density on seismic waves (attribute) parameters. Pore-hole density, pressure, temperature, material and fluid can apparently (influence) on seismic waves attributes such as velocity, amplitude, attenuation etc. But, seismic wave (dynamic) characteristics are more evident than its kinematical characteristics. Therefore, seismic amplitude and attenuation may be more effective than seismic velocity on the detection of the pore-hole characteristics of reservoir.