Journal
ROCK MECHANICS AND ROCK ENGINEERING
Volume 52, Issue 9, Pages 3293-3304Publisher
SPRINGER WIEN
DOI: 10.1007/s00603-019-01770-3
Keywords
Horizontal fracture; Vp; Vs ratio; Fluid saturation; Hydraulic fracture
Funding
- National Natural Science Fund Projects [41804127, 41831281, 41804105]
- Major National Project Program [2017ZX05018-005]
- Fundamental Research Funds for the Central Universities [2462018YJRC008]
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Fractures are widely distributed within the Earth's crust and have a substantial influence on wave propagation. Although many studies have been conducted on fracture characterization based on seismic anisotropic attributes, natural horizontal fractures and hydraulic fracture networks have yet to be characterized. Here, we investigate the influence of the fracture orientation and saturation on the Vp/Vs ratio via laboratory observations and theoretical modeling. Then, we discuss the feasibility of using the Vp/Vs ratio to predict natural horizontal fractures and evaluate hydraulic fracture networks. Our study demonstrates that an abnormally low Vp/Vs ratio, together with a lack of shear wave splitting, could be used to predict horizontal fractures. Fracture network development that results from hydraulic fracturing stimulation is associated with a much higher Vp/Vs ratio and no shear wave splitting; these two characteristics could be used to estimate fracture development and evaluate hydraulic fracturing stimulation.
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