ON THE THEORY OF LOCAL SOUNDING OF HYDRAULIC FRACTURES USING PULSED PRESSURE WAVES

The paper considers the evolution of a pulse signal in the annular gap between a diagnostic probe and an open well in a low-permeability fractured formation. Fractures are located along the well, and the well and the fractured porous medium are filled with the same acoustically compressible fluid. T...

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Bibliographic Details
Published in:Journal of applied mechanics and technical physics 2021-07, Vol.62 (4), p.563-572
Main Authors: Shagapov, V. Sh, Galiakbarova, E. V., Khakimova, Z. R.
Format: Article
Language:English
Subjects:
Annular gaps
Applications of Mathematics
Attenuation coefficients
Boreholes
Classical and Continuum Physics
Classical Mechanics
Compressible fluids
Elastic waves
Evolution
Fast Fourier transformations
Filtration
Fluid- and Aerodynamics
Fourier transforms
Hydraulic fracturing
Mathematical Modeling and Industrial Mathematics
Mechanical Engineering
Phase velocity
Physics
Physics and Astronomy
Porous media
Traveling waves
Wave propagation
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Summary:The paper considers the evolution of a pulse signal in the annular gap between a diagnostic probe and an open well in a low-permeability fractured formation. Fractures are located along the well, and the well and the fractured porous medium are filled with the same acoustically compressible fluid. The problem is solved numerically using the fast Fourier transform. Dispersion equations are obtained that describe the propagation of damped traveling waves in the gap taking into account fluid filtration through longitudinal fractures. An analyzed is made of the influence of the filtration characteristics of the reservoir and hydraulic fractures and the width of the gap between the probe body and the borehole wall on the phase velocity, the attenuation coefficient, and the evolution of pulse signals.
ISSN:0021-8944
1573-8620
DOI:10.1134/S0021894421040052