频谱振幅比法中岩石样品有效尺寸的试验研究  

Experimental Study on Effective Size of Rock Samples in the Method of Frequency-amplitude Ratio

作　　者：安勇[1] 魏立春[2] 

机构地区：[1]中国石油大学(北京)CNPC物探重点实验室,北京102249 [2]中国石油大学(北京)石油天然气成藏机理教育部重点实验室,北京102249

出　　处：《石油天然气学报》2007年第1期48-51,共4页Journal of Oil and Gas Technology

摘　　要：岩石吸收衰减系数是岩石特征的一个重要参数,在用频谱振幅比法测试岩石衰减时,大多数实验室待测岩石样品的大小不能满足测试的严格要求。用频谱振幅比法测试衰减样品的几何尺寸进行了测试分析,结果表明对于大多数岩石样品,当岩样的横向尺寸(直径)和纵向长度比值大于等于1时,就能满足频谱振幅比法测试衰减的要求,可以使测试信号的有效波不受或可能少受到侧面干扰波的影响,保证测试结果的精确性。Rock attenuation coefficient is one of the important parameters of rock characters. When the rock attenuation is detected by using the method of frequency-amplitude ratio. The sizes of most rock samples in the laboratory can not satisfied with strict requirements of measurement. The geometric sizes of rock samples are tested and analyzed with the method. The result shows that for the most of rock samples, when its lateral size (diameter) and its vertical length ratio are ≥1, it is satisfied with the requirements of measurement ,thus the effective wave from the test signal can not be influenced or can be less influenced by the lateral interference wave for the purpose of ensuring the accuracy of test result.

关 键 词：频谱振幅比法 纵波 横波 岩石样品 测度试验研究 

分 类 号：P584[天文地球—岩石学]