Field testing of fiber-optic distributed acoustic sensing (DAS) for subsurface seismic monitoring

Daley, Thomas M.; Freifeld, Barry; Ajo‐Franklin, Jonathan; Dou, Shan; Pevzner, Roman; Shulakova, Valeriya; Kashikar, Sudhendu; Miller, Douglas E.; Goetz, Julia; Henninges, Jan; Lueth, S.

doi:10.1190/tle32060699.1

Cited by 389 publications

(196 citation statements)

References 10 publications

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“…As described in Kazemeini et al [24], in the upper part of the survey, no clear first arrivals could be identified, because of a poorly cemented casing. Casing and cementation of Ktzi202 are shown in Figure 3 (modified after Daley et al [25]). Large parts of the observation well are completed with multiple casings, not cemented to one another or to the formation.…”

Section: Influence Of the Uncementedmentioning

confidence: 99%

“…[25]). Left: casing and cementation (grey) of Ktzi202; the lithology is plotted in the centre of the well [21].…”

Section: Acquisitionmentioning

confidence: 99%

“…The vertical component of the baseline zero-offset VSP is shown on the right side of Figure 3. The traces are balanced and a linear moveout with steel velocity (6100 m/s, [25]) was applied. Apparently, the waves down to 460 m below ground level (m b.gl.)…”

Section: Influence Of the Uncementedmentioning

confidence: 99%

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Zero-Offset VSP Monitoring of CO₂Storage: Impedance Inversion and Wedge Modelling at the Ketzin Pilot Site

Götz

Krawczyk

Cosma³

2014

International Journal of Geophysics

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At the CO 2 storage pilot site near the town of Ketzin (35 km west of Berlin, Germany) the sandstone reservoir at 630 m-650 m depth is thin and heterogeneous. The time-lapse analysis of zero-offset VSP measurements shows that CO 2 -induced amplitude changes can be observed on near-well corridor stacks. Further, we investigate whether CO 2 -induced amplitude changes in the monitoring data can be used to derive geometrical and petrophysical parameters governing the migration of CO 2 within a brine saturated sandstone aquifer. 2D seismic-elastic modelling is done to test the processing workflow and to perform a wedge modelling study for estimation of the vertical expansion of the CO 2 plume. When using the NRMS error as a measure for the similarity between the modelled and recorded repeat traces, the best match is achieved for a plume thickness of 6-7 m within the reservoir sandstone of 8 m thickness. With band limited impedance inversion a velocity reduction at the top of the reservoir of 30%, influenced by casing reverberations as well as CO 2 injection, is found. The relation of seismic amplitude to CO 2 saturated layer thickness and CO 2 -induced changes in P-wave velocities are important parameters for the quantification of the injected CO 2 volume.

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Section: Influence Of the Uncementedmentioning

confidence: 99%

“…[25]). Left: casing and cementation (grey) of Ktzi202; the lithology is plotted in the centre of the well [21].…”

Section: Acquisitionmentioning

confidence: 99%

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Zero-Offset VSP Monitoring of CO₂Storage: Impedance Inversion and Wedge Modelling at the Ketzin Pilot Site

Götz

Krawczyk

Cosma³

2014

International Journal of Geophysics

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“…The fibre-optic distributed acoustic sensing technology (DAS) can be used for exploring earth crustal elastic properties and monitoring both strain and seismic waves with unprecedented acquisition characteristics (Daley et al, 2013). The DAS technology principle lies in sending successive and coherent pulses of light in an optical fibre and measuring the back-scattered light issued from elastic scattering at random defaults within the fibre (Massoudi & Newson, 2016).…”

Section: Introductionmentioning

confidence: 99%

“…

AbstractThe fibre-optic distributed acoustic sensing technology (DAS) can be used for exploring earth crustal elastic properties and monitoring both strain and seismic waves with unprecedented acquisition characteristics (Daley et al, 2013). The DAS technology principle lies in sending successive and coherent pulses of light in an optical fibre and measuring the back-scattered light issued from elastic scattering at random defaults within the fibre (Massoudi & Newson, 2016).

…”

mentioning

confidence: 99%

Crustal Exploration and Monitoring Seismic Events with a Fibre-optic Cable Deployed at the Ground Surface in Iceland

Jousset¹,

Reinsch²,

Henninges³

et al. 2017

Proceedings

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SUMMARYWe present new results of records from a 15 km long fibre-optic cable deployed at the surface in Iceland.We estimate the quality of records of seismic events with the cable for both exploration and monitoring.EAGE/DGG Workshop on Fibre Optic Technology in Geophysics 31 March 2017, Potsdam, Germany AbstractThe fibre-optic distributed acoustic sensing technology (DAS) can be used for exploring earth crustal elastic properties and monitoring both strain and seismic waves with unprecedented acquisition characteristics (Daley et al., 2013). The DAS technology principle lies in sending successive and coherent pulses of light in an optical fibre and measuring the back-scattered light issued from elastic scattering at random defaults within the fibre (Massoudi & Newson, 2016). The read-out unit includes an interferometer which measures light interference patterns continuously. The changes in the interference pattern are related to the distance variations between such defaults and therefore the strain applied on the fibre can be detected. Along an optical fibre, DAS can be used to acquire acoustic signals with a high spatial (every meter over kilometres) and temporal resolution (thousand of Hz).

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Fiber‐Optic Network Observations of Earthquake Wavefields

Lindsey

Martin

Dreger

et al. 2017

Geophysical Research Letters

306

164

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Our understanding of subsurface processes suffers from a profound observation bias: seismometers are sparse and clustered on continents. A new seismic recording approach, distributed acoustic sensing (DAS), transforms telecommunication fiber‐optic cables into sensor arrays enabling meter‐scale recording over tens of kilometers of linear fiber length. We analyze cataloged earthquake observations from three DAS arrays with different horizontal geometries to demonstrate some possibilities using this technology. In Fairbanks, Alaska, we find that stacking ground motion records along 20 m of fiber yield a waveform that shows a high degree of correlation in amplitude and phase with a colocated inertial seismometer record at 0.8–1.6 Hz. Using an L‐shaped DAS array in Northern California, we record the nearly vertically incident arrival of an earthquake from The Geysers Geothermal Field and estimate its backazimuth and slowness via beamforming for different phases of the seismic wavefield. Lastly, we install a fiber in existing telecommunications conduits below Stanford University and show that little cable‐to‐soil coupling is required for teleseismic P and S phase arrival detection.

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Field testing of fiber-optic distributed acoustic sensing (DAS) for subsurface seismic monitoring

Abstract: Nonreflection seismic and inversion of surface and guided waves 936 The Leading Edge June 2013 Nonreflection seismic and inversion of surface and guided waves Field testing of fiber-optic distributed acoustic sensing (DAS) for subsurface seismic monitoring

Cited by 389 publications

References 10 publications

Zero-Offset VSP Monitoring of CO₂Storage: Impedance Inversion and Wedge Modelling at the Ketzin Pilot Site

Zero-Offset VSP Monitoring of CO₂Storage: Impedance Inversion and Wedge Modelling at the Ketzin Pilot Site

Crustal Exploration and Monitoring Seismic Events with a Fibre-optic Cable Deployed at the Ground Surface in Iceland

Fiber‐Optic Network Observations of Earthquake Wavefields

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Field testing of fiber-optic distributed acoustic sensing (DAS) for subsurface seismic monitoring

Abstract: Nonreflection seismic and inversion of surface and guided waves 936 The Leading Edge June 2013 Nonreflection seismic and inversion of surface and guided waves Field testing of fiber-optic distributed acoustic sensing (DAS) for subsurface seismic monitoring

Cited by 389 publications

References 10 publications

Zero-Offset VSP Monitoring of CO2Storage: Impedance Inversion and Wedge Modelling at the Ketzin Pilot Site

Zero-Offset VSP Monitoring of CO2Storage: Impedance Inversion and Wedge Modelling at the Ketzin Pilot Site

Crustal Exploration and Monitoring Seismic Events with a Fibre-optic Cable Deployed at the Ground Surface in Iceland

Fiber‐Optic Network Observations of Earthquake Wavefields

Contact Info

Product

Resources

About

Zero-Offset VSP Monitoring of CO₂Storage: Impedance Inversion and Wedge Modelling at the Ketzin Pilot Site

Zero-Offset VSP Monitoring of CO₂Storage: Impedance Inversion and Wedge Modelling at the Ketzin Pilot Site