Abstract：In order to study the attenuation properties,a series of uniaxial stress cycling tests performed in triangle waveform loading under different initial stress levels were conducted on dry Daqing sandstones using CMT5504 testing machine.With the stress amplitude fixed,we got the attenuation characteristics in the frequency range of 0.001 to 0.01Hz,then under the fixed frequency,the relationship between attenuation and stress amplitudes was obtained.In comparison with the results of sine waveform loading,it was found that the relationship from triangular waveform loading was similar.Besides this,it's found that the attenuation value was proportional to stress amplitude,but inversely proportional to initial stress level.With the help of Endochronic theory and P-M model theory,we gave a suitable reason for the results.At last,according to the known relationship,we predicted the attenuation under the unknown conditions (such as initial stress level,frequency,strain amplitude),and the prediction results fit the experiment results closely.
赵闯, 施行觉, 李成波, 杨映希. 应力加载频率及振幅对大庆砂岩衰减特性影响的实验研究[J]. 石油地球物理勘探, 2010, 45(4): 534-539.
Zhao Chuang, Shi Xing-jue, Li Cheng-bo, Yang Ying-xi. The Lab studies of influence of stress loading frequencies and amplitudes on Daqing sandstone attenuation characteristics. OGP, 2010, 45(4): 534-539.
