岩石中应力弛豫的衰减和模量色散

The attenuation of stress relaxation and the modulus dispersion in rocks

中国科学技术大学, 合肥230026

Univof Sci&Techof China, Hefei 230026

本文在低频和声频范围内研究了砂岩、大理岩及花岗岩在不同饱和液体情况下的衰减和模量随温度的变化, 同时还探讨了衰减与激发频率、共振振幅的关系。并根据时温等效原理, 得出了饱和原油砂岩在衰减～温度港上28℃的衰减峰应该与衰减～频率港上8．9HZ的衰减峰相对应的结论。

It is found that, In the ranges of low ftequency and acoustic ftequency, when sandstone,marble, granite are saturated with diffcrent fluids, the attcnuation of stress relaxation and themodulus of the rocks vary with the change of tcmpcrature, the relationships between theattcnuation and exciting ftequency, rcsonance amplitude. According to the principle of cquivalencybetween time and temperature it is concluded that the attenuation peak at 28℃ in the attcnuationtemperature spcctrum corresponds the peak at 8. 88Hz in the attcnuation-frequeney spectrum foroil-saturated sandstone.