Slow wave phenomena at seismic frequencies

Goloshubin, Gennady; Krauklis, P. V.; Molotkov, L. A.; Helle, Hans B.

doi:10.1190/1.1822623

Cited by 16 publications

(8 citation statements)

References 2 publications

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“…Hydrocarbon indicating information is extracted from spectral modifications of naturally occurring background waves in the 0.1-20 Hz range interacting with hydrocarbon bearing porous structures. Similar observations have been made at more than 15 sites worldwide [3][4][5][6][7][8].…”

Section: Introductionsupporting

confidence: 74%

Hydrocarbon microtremors interpreted as nonlinear oscillations driven by oceanic background waves

Holzner¹,

Eschle²,

Dangel

et al. 2009

Communications in Nonlinear Science and Numerical Simulation

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Section: Introductionsupporting

confidence: 74%

Hydrocarbon microtremors interpreted as nonlinear oscillations driven by oceanic background waves

Holzner¹,

Eschle²,

Dangel

et al. 2009

Communications in Nonlinear Science and Numerical Simulation

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“…Fluid-filled fracture waves also have been investigated both numerically and in laboratory studies to explain volcanic tremors and monitoring of hydraulic fracturing (Chouet, 1986(Chouet, , 1988Ferrazzini et al, 1988;Tang and Cheng, 1988;Goloshubin, et al, 1994;Groenenboom and Falk, 2000;Groenenboom and van Dam, 2000;Groenenboom and Fokkema, 1998), Slow fluid waves are essential for generating tube-wave reflections from intersecting fractures (Hornby et al, 1989;Kostek et al, 1998 a, b;Derov et al, 2009;Ziatdinov et al, 2006). The high amplitudes of such waves make the solution of relevant problems rather simple, because we can ignore most other types of waves without compromising the result.…”

Section: Theory For a Fracture Previous Workmentioning

confidence: 99%

Low-frequency fluid waves in fractures and pipes

Korneev

2010

GEOPHYSICS

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Low-frequency analytical solutions have been obtained for phase velocities of symmetrical fluid waves within both an infinite fracture and a pipe filled with a viscous fluid.Three different fluid wave regimes can coexist in such objects, depending on the various combinations of object parameters. These regimes include Biot, Stoneley, and "narrow channel." Equations for velocities of all these regimes have explicit forms and are verified by comparisons with exact solutions. Computations suggest that for pipes, the most common is the Biot regime, while for fractures it is the Stoneley regime. For real rock in fractures, the Biot regime exists only when fluid is in a gaseous state. The dominant role of fractures in rock permeability at field scales and the strong amplitude and frequency effects of Stoneley guided waves suggest the importance of incorporating these effects within poroelastic theories.

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“…Molotkov and Bakulin (1998) showed that for infinite fracture models, a stack of fractures filled with nonviscous fluid has a solution in the form of the second Biot's wave propagating in a transverse isotropic medium with frequency-independent velocity. Goloshubin et al (1993Goloshubin et al ( , 1994 found that the slow Stoneley-type wave can also propagate in such medium when it is sandwiched between two elastic half-spaces. An unbounded stack of fractures containing viscous fluid is capable of carrying frequency-dependent slow Biot-type waves (Gurevich, 2002;Schoenberg, 1984Schoenberg, , 1983.…”

Section: Introductionmentioning

confidence: 99%

Slow waves in fractures filled with viscous fluid

2008

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Stoneley guided waves in a fluid-filled fracture generally have larger amplitudes than other waves, and therefore, their properties need to be incorporated in more realistic models.In this study, a fracture is modeled as an infinite layer of viscous fluid bounded by two elastic half-spaces with identical parameters. For small fracture thickness, I obtain a simple dispersion equation for wave-propagation velocity. This velocity is much smaller than the velocity of a fluid wave in a Biot-type solution, in which fracture walls are assumed to be rigid. At seismic prospecting frequencies and realistic fracture thicknesses, the Stoneley guided wave has wavelengths on the order of several meters and an attenuation Q factor exceeding 10, which indicates the possibility of resonance excitation in fluid-bearing rocks.The velocity and attenuation of Stoneley guided waves are distinctly different at low frequencies for water and oil. The predominant role of fractures in fluid flow at field scales is supported by permeability data showing an increase of several orders of magnitude when compared to values obtained at laboratory scales. These data suggest that Stoneley guided waves should be taken into account in theories describing seismic wave propagation in fluidsaturated rocks.

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Slow wave phenomena at seismic frequencies

Cited by 16 publications

References 2 publications

Hydrocarbon microtremors interpreted as nonlinear oscillations driven by oceanic background waves

Hydrocarbon microtremors interpreted as nonlinear oscillations driven by oceanic background waves

Low-frequency fluid waves in fractures and pipes

Slow waves in fractures filled with viscous fluid

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