1887

Abstract

A strong VTI fabric can dominate the influence of weaker azimuthal anisotropy on seismic wave propagation, causing ambiguities, making it challenging to invert geophysical observations for fracture orientations and densities. We employ SWS technique for a microseismic dataset collected in a vertical borehole during a hydraulic stimulation of a shale gas target in northern Poland to image the fracture strike and density masked by a strong VTI signature. In order to overcome VTI fabric influence and enhance the inversion stability we integrate SWS data with parameters obtained from the surface 3D seismic survey. We succesfully image a pre-existing vertical fracture set not aligned with the maximum horizontal stress. The obtained results are consistent with fracture strike and crack density interpreted from well logs data.

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/content/papers/10.3997/2214-4609.201701689
2017-06-12
2024-03-29
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http://instance.metastore.ingenta.com/content/papers/10.3997/2214-4609.201701689
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