THE EXPERIMENTAL RESEARCH OF SEISMIC WAVE VELOCITY OF SANDSTONES IN HAMI, XINJIANG AND THE ENLIGHTMENT TO THE WORK OF PROPERTY ON SPECIAL GEOLOGICAL MAPPING

WANG Huai-min; WANG Hong-cai; YIN Chang-ji; LI A-wei; ZHAO Wei-hua; DU Wei

Volume 23 Issue 2

Apr. 2017

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Article Navigation > Journal of Geomechanics > 2017 > 23(2): 224-231

WANG Huai-min, WANG Hong-cai, YIN Chang-ji, et al., 2017. THE EXPERIMENTAL RESEARCH OF SEISMIC WAVE VELOCITY OF SANDSTONES IN HAMI, XINJIANG AND THE ENLIGHTMENT TO THE WORK OF PROPERTY ON SPECIAL GEOLOGICAL MAPPING. Journal of Geomechanics, 23 (2): 224-231.

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THE EXPERIMENTAL RESEARCH OF SEISMIC WAVE VELOCITY OF SANDSTONES IN HAMI, XINJIANG AND THE ENLIGHTMENT TO THE WORK OF PROPERTY ON SPECIAL GEOLOGICAL MAPPING

WANG Huai-min^{1, 2
,},
WANG Hong-cai^{1
,
,},
YIN Chang-ji³,
LI A-wei¹,
ZHAO Wei-hua¹,
DU Wei^{1, 2}

1.
Institute of Geomechanics, Chinese Academy of Geological Sciences, Beijing 100081, China
2.
College of Geosciences, China University of Petroleum, Beijing 102249, China
3.
Hubei Xinxing New Energy Development Company of Sinopec, Wuhan 430000, Hubei, China

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Abstract

Abstract

The seismic wave velocity of sandstones in Hami in the process of special geological mapping isstudied in this article. The effects of density, porosity and pressure on seismic wave velocity under different pressure(0~200 MPa)are analyzed by applying ZBL-U520 nonmetal ultrasonic detector and AutoLab 2000 computer-controlled servo hydraulic triaxial test system. The results show that wave velocity and density are positively correlated, but there is a negative correlation between wave velocity and porosity. The degree of linear relationship between density or porosity and P-wave is higher than that of S-wave. Both P-and S-wave velocities of sandstones in Hami area increase notably with the increasing pressure which denotes a strong logarithmic relationship.Besides, the adaptability of test methods of ZBL-U520 nonmetal ultrasonic detector and AutoLab 2000 computer-controlled servo hydraulic triaxial test system are analyzed.In conclusion, in respect of geological mapping it is suggested that not only should we collect samples to test the seismic wave velocity of rocks at normal temperatures and pressure, but also we should analyze the seismic wave characteristics under different formation pressure to comprehensively understand the seismic properties in special geological mapping.
- special geological mapping,
- seismic wave velocity of sandstone in Hami area,
- confining pressure,
- porosity,
- density

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References

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