STUDY ON SEISMIC PROPERTY OF CRACK-INCLUDED PHYSICAL MODEL

ZHAO Wei-hua; WEI Jian-xin; SUN Dong-sheng; LI A-wei; WANG Hong-cai

Volume 22 Issue 4

Dec. 2016

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Article Navigation > Journal of Geomechanics > 2016 > 22(4): 967-975

ZHAO Wei-hua, WEI Jian-xin, SUN Dong-sheng, et al., 2016. STUDY ON SEISMIC PROPERTY OF CRACK-INCLUDED PHYSICAL MODEL. Journal of Geomechanics, 22 (4): 967-975.

Citation:

ZHAO Wei-hua, WEI Jian-xin, SUN Dong-sheng, et al., 2016. STUDY ON SEISMIC PROPERTY OF CRACK-INCLUDED PHYSICAL MODEL. Journal of Geomechanics, 22 (4): 967-975.

Citation:

ZHAO Wei-hua, WEI Jian-xin, SUN Dong-sheng, et al., 2016. STUDY ON SEISMIC PROPERTY OF CRACK-INCLUDED PHYSICAL MODEL. Journal of Geomechanics, 22 (4): 967-975.

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STUDY ON SEISMIC PROPERTY OF CRACK-INCLUDED PHYSICAL MODEL

ZHAO Wei-hua^{1, 2
,},
WEI Jian-xin^{1, 2},
SUN Dong-sheng³,
LI A-wei^{1, 2},
WANG Hong-cai^{1, 2}

1.
Institute of Geomechanics, CAGS, Beijing 100081, China
2.
Key Laboratory of Neotectonic Movement and Geohazard, Ministry of Land and Resources, Beijing 100081, China
3.
CNPC Key Lab of Geophysical Prospecting, China University of Petroleum, Changping District, Beijing, 102249, China

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Abstract

Abstract

It is very helpful in petroleum production, groundwater exploration and to disposal of pollution to investigate the seismic property of the crustal rocks included cracks or fractures. Two group physical models with the same diameter varying crack density and the same density varying diameters were constructed. The seismic velocities were measured under different confining pressure and calculated by numerical simulation based on Hudson theory. The calculated and measured results show that the V_p and V_s nearly increase linearity and there anisotropy keep nearly stable constant with confining pressure. V_p circles decrease with the crack density varying from 2% to 6%. Moreover, the slow V_p decrease more amplitude than the fast V_p which maintains nearly stable, the V_p and V_s anisotropy all increase with the crack density ranging from 2% to 6%.With the crack diameter varying from 2 mm to 3 mm, the V_p increases, but the V_p anisotropy decreases, V_s and the V_s anisotropy nearly remain constant. Comparing the experimental and the theoretical calculated results, new conclusion of Hudson theory used in different depth was discussed, and the primary constraint of its application were analyzed. It is very helpful in petroleum production, exploration of groundwater and disposal of pollution to investigaste the seismic property of the crustal rocks with cracks or fractures.
- crack,
- Hudson theory,
- rock physical model,
- velocity,
- confining pressure

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References(25)

References

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STUDY ON SEISMIC PROPERTY OF CRACK-INCLUDED PHYSICAL MODEL

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