地球物理学进展 ›› 2018, Vol. 33 ›› Issue (5): 1943-1950.doi: 10.6038/pg2018CC0144

• 应用地球物理学Ⅰ(油气及金属矿产地球物理勘探) • 上一篇    下一篇

岩石跨频段实验研究

马霄一(),王尚旭,赵建国,赵立明,龙腾   

  1. 中国石油大学(北京) 油气资源与探测国家重点实验室,北京 102249
  • 收稿日期:2018-03-26 修回日期:2018-07-15 出版日期:2018-10-20 发布日期:2019-01-11
  • 作者简介:马霄一,男,1986年生,江苏扬州人,在读博士研究生,主要从事岩石物理实验研究工作.
  • 基金资助:
    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);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)

Laboratory study of rocks in multi-frequency band

MA Xiao-yi(),WANG Shang-xu,ZHAO Jian-guo,ZHAO Li-ming,LONG Teng   

  1. State Key Laboratory of Petroleum Resources and Prospecting, China University of Petroleum (Beijing), Beijing 102249, China
  • Received:2018-03-26 Revised:2018-07-15 Online:2018-10-20 Published:2019-01-11

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.

关键词: 频率, 流体, 流体因子, 砂岩, 碳酸盐岩

Abstract:

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 VP and VS on 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 water-saturated. 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.

Key words: frequency, fluid, fluid factor, sandstone, carbonate rock

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