摘要
为了在实验室获得直接的频散测量,我们已经开发了系统的测量技术来研究岩石的弹性性质,它涵盖了从地震频率范围到超声波频带(也称为跨频带测量系统).该系统包括应力-应变测量法和传统超声法,我们利用这两种方法得到了4块岩样(2块砂岩,2块碳酸盐岩)的纵、横波速度.实验结果表明:砂岩在水或者甘油饱和条件下,速度均会出现频散,水饱和时频散幅度更大;碳酸盐岩在水或者甘油饱和条件下,没有明显的频散现象.同时,计算了地震频率和超声频率下的流体因子敏感系数,发现流体识别因子中泊松阻抗最为敏感.
To obtain the direct laboratory-scale dispersion measurements,we laboratory have developed systematic measurement techniques to investigate the elastic properties of rock,which cover frequency bands from seismic frequency range to ultrasonic range（ also known as the multi-band measurement techniques system）.This system contains stress-strain measurement method and traditional ultrasonic method,we achieved VPand VSon four sample（ 2 sandstones and 2 carbonate rocks）. Results show that the velocity of sandstones will appear dispersion under water-and glycerin-saturated, and dispersion will be larger with watersaturated. There is no obvious dispersion in carbonate rocks under water-and glycerin-saturated. At the same time,the fluid factor sensitivity coefficients at the seismic frequency and ultrasonic frequency are calculated. It is found that the Poisson impedance is most sensitive to the identification of the fluid in these rocks.
作者
马霄一
王尚旭
赵建国
赵立明
龙腾
MA Xiao-yi;WANG Shang-xu;ZHAO Jian-guo;ZHAO Li-ming;LONG Teng(State Key Laboratory of Petroleum Resources and Prospecting,China University of Petroleum（Beijing）,Beijing 102249,China)
出处
《地球物理学进展》
CSCD
北大核心
2018年第5期1943-1950,共8页
Progress in Geophysics
基金
国家科技重大专项课题"下古生界-前寒武系地球物理勘探关键技术研究"(2016ZX05004-003)和针对碳酸盐岩储层的跨频段(从地震频率-超声频率)岩石物理实验与建模研究(41574103)共同资助
关键词
频率
流体
流体因子
砂岩
碳酸盐岩
frequency
fluid
fluid factor
sandstone
carbonaterock
