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Nature of the Anisotropic Response of a Fluid Saturated Medium to Surface Seismic Wave Propagation.

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Title: Nature of the Anisotropic Response of a Fluid Saturated Medium to Surface Seismic Wave Propagation.
Authors: Panteleev, I. A.1 (AUTHOR) pia@icmm.ru, Lozhkin, D. V.1 (AUTHOR) lozhkin.d@icmm.ru, Lyakhovsky, V.2 (AUTHOR) vladimir.lyakhovsky@gmail.com, Shalev, E.2 (AUTHOR) eyal2shalev@gmail.com
Source: Izvestiya, Physics of the Solid Earth. Apr2025, Vol. 61 Issue 2, p224-235. 12p.
Subject Terms: *Seismic waves, *Pore water pressure, *Anisotropy, *Fault zones, *Poroelasticity, *Aquifers, *Fracture mechanics
Abstract: Abstract—Monitoring of pore pressure or water level changes in observation wells shows significant variations both during the passage of P- and Rayleigh waves and during the passage of S- and Love waves. Recent borehole measurements have shown an azimuthal dependence of pore pressure variations on the stress orientation and strike direction of the fault zone. In the active fault zone, fracture-induced anisotropy corresponds to the preferred orientation of microcracks and other discontinuities in the medium. This paper is devoted to the development of a modified Skempton equation for a quantitative description of surface wave induced pore pressure variations in a reservoir, related to the orientation and principal values of the stress tensor and rock damage (fracturing). The developed relationships allow the azimuthal dependence of the pore pressure response to be described by a dimensionless parameter defined as the ratio of the amplitudes of the pressure variations caused by the shear component and the bulk strain. According to the proposed theoretical model, the maximum poroelastic response of the reservoir to the passage of a seismic wave is manifested in the case of subparallelism of the directions of predominant rock fracturing and maximum horizontal stress. Pore pressure monitoring data from the Arbuckle wastewater disposal reservoir (Oklahoma, USA) are used to verify the proposed theoretical model. It is shown that the observed diversity of pore pressure response in wells located in the vicinity of a fault zone intersecting the reservoir to the passage of seismic waves from seismic events at different distances is described with high accuracy by the developed model. [ABSTRACT FROM AUTHOR]
Database: Energy & Power Source
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Header DbId: enr
DbLabel: Energy & Power Source
An: 186837150
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Items – Name: Title
  Label: Title
  Group: Ti
  Data: Nature of the Anisotropic Response of a Fluid Saturated Medium to Surface Seismic Wave Propagation.
– Name: Author
  Label: Authors
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  Data: <searchLink fieldCode="AR" term="%22Panteleev%2C+I%2E+A%2E%22">Panteleev, I. A.</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> pia@icmm.ru</i><br /><searchLink fieldCode="AR" term="%22Lozhkin%2C+D%2E+V%2E%22">Lozhkin, D. V.</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> lozhkin.d@icmm.ru</i><br /><searchLink fieldCode="AR" term="%22Lyakhovsky%2C+V%2E%22">Lyakhovsky, V.</searchLink><relatesTo>2</relatesTo> (AUTHOR)<i> vladimir.lyakhovsky@gmail.com</i><br /><searchLink fieldCode="AR" term="%22Shalev%2C+E%2E%22">Shalev, E.</searchLink><relatesTo>2</relatesTo> (AUTHOR)<i> eyal2shalev@gmail.com</i>
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  Data: <searchLink fieldCode="JN" term="%22Izvestiya%2C+Physics+of+the+Solid+Earth%22">Izvestiya, Physics of the Solid Earth</searchLink>. Apr2025, Vol. 61 Issue 2, p224-235. 12p.
– Name: Subject
  Label: Subject Terms
  Group: Su
  Data: *<searchLink fieldCode="DE" term="%22Seismic+waves%22">Seismic waves</searchLink><br />*<searchLink fieldCode="DE" term="%22Pore+water+pressure%22">Pore water pressure</searchLink><br />*<searchLink fieldCode="DE" term="%22Anisotropy%22">Anisotropy</searchLink><br />*<searchLink fieldCode="DE" term="%22Fault+zones%22">Fault zones</searchLink><br />*<searchLink fieldCode="DE" term="%22Poroelasticity%22">Poroelasticity</searchLink><br />*<searchLink fieldCode="DE" term="%22Aquifers%22">Aquifers</searchLink><br />*<searchLink fieldCode="DE" term="%22Fracture+mechanics%22">Fracture mechanics</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: Abstract—Monitoring of pore pressure or water level changes in observation wells shows significant variations both during the passage of P- and Rayleigh waves and during the passage of S- and Love waves. Recent borehole measurements have shown an azimuthal dependence of pore pressure variations on the stress orientation and strike direction of the fault zone. In the active fault zone, fracture-induced anisotropy corresponds to the preferred orientation of microcracks and other discontinuities in the medium. This paper is devoted to the development of a modified Skempton equation for a quantitative description of surface wave induced pore pressure variations in a reservoir, related to the orientation and principal values of the stress tensor and rock damage (fracturing). The developed relationships allow the azimuthal dependence of the pore pressure response to be described by a dimensionless parameter defined as the ratio of the amplitudes of the pressure variations caused by the shear component and the bulk strain. According to the proposed theoretical model, the maximum poroelastic response of the reservoir to the passage of a seismic wave is manifested in the case of subparallelism of the directions of predominant rock fracturing and maximum horizontal stress. Pore pressure monitoring data from the Arbuckle wastewater disposal reservoir (Oklahoma, USA) are used to verify the proposed theoretical model. It is shown that the observed diversity of pore pressure response in wells located in the vicinity of a fault zone intersecting the reservoir to the passage of seismic waves from seismic events at different distances is described with high accuracy by the developed model. [ABSTRACT FROM AUTHOR]
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RecordInfo BibRecord:
  BibEntity:
    Identifiers:
      – Type: doi
        Value: 10.1134/S1069351325700223
    Languages:
      – Code: eng
        Text: English
    PhysicalDescription:
      Pagination:
        PageCount: 12
        StartPage: 224
    Subjects:
      – SubjectFull: Seismic waves
        Type: general
      – SubjectFull: Pore water pressure
        Type: general
      – SubjectFull: Anisotropy
        Type: general
      – SubjectFull: Fault zones
        Type: general
      – SubjectFull: Poroelasticity
        Type: general
      – SubjectFull: Aquifers
        Type: general
      – SubjectFull: Fracture mechanics
        Type: general
    Titles:
      – TitleFull: Nature of the Anisotropic Response of a Fluid Saturated Medium to Surface Seismic Wave Propagation.
        Type: main
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          Name:
            NameFull: Panteleev, I. A.
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            NameFull: Lozhkin, D. V.
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            NameFull: Lyakhovsky, V.
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            NameFull: Shalev, E.
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            – D: 01
              M: 04
              Text: Apr2025
              Type: published
              Y: 2025
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              Value: 10693513
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              Value: 61
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            – TitleFull: Izvestiya, Physics of the Solid Earth
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