Abstract
The problem on tube wave excitation in a well intersected by a finite-size fluid-filled crack under action of external seismic wave is considered. This situation appears at vertical seismic profiling (VSP) in the presence of hydro-fracture intersecting the borehole. A heterogeneous integral-differential equation for the fluid pressure field in fracture is derived in the long-wave approximation by the fracture opening. Stitching of the solution for pressure in fracture with that for tube waves in a well allows to calculate the amplitude and shape of generated tube waves. Numerical computations that under action of the external seismic field the crack edges excite a strongly dispersive mode of a thin fluid layer which can be used for estimation of linear fracture size on the basis of VSP technique.
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Original Russian Text © G.A. Maksimov, A.V. Derov, B.M. Kashtan, M.Yu. Lazarkov, 2011, published in Akusticheskii Zhurnal, 2011, Vol. 57, No. 4, pp. 521–533.
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Maksimov, G.A., Derov, A.V., Kashtan, B.M. et al. Estimation of hydro-fracture parameters by analysis of tube waves at vertical seismic profiling. Acoust. Phys. 57, 529–541 (2011). https://doi.org/10.1134/S1063771011040166
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DOI: https://doi.org/10.1134/S1063771011040166