Volume 22 Issue 4
Dec.  2016
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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.

STUDY ON SEISMIC PROPERTY OF CRACK-INCLUDED PHYSICAL MODEL

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  • Received: 2016-06-20
  • Published: 2016-12-01
  • 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 Vp and Vs nearly increase linearity and there anisotropy keep nearly stable constant with confining pressure. Vp circles decrease with the crack density varying from 2% to 6%. Moreover, the slow Vp decrease more amplitude than the fast Vp which maintains nearly stable, the Vp and Vs anisotropy all increase with the crack density ranging from 2% to 6%.With the crack diameter varying from 2 mm to 3 mm, the Vp increases, but the Vp anisotropy decreases, Vs and the Vs 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.

     

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