Acquisition and Processing Challenges in Continuous Active Reservoir Monitoring

Bianchi, T.; Meunier, J.; Lanfranchi, Pierre; Huguet, F.; Bruneau, J.

doi:10.3997/2214-4609-pdb.11.p29

Cited by 2 publications

(1 citation statement)

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“…Geophysics offers many techniques for detecting, characterizing and monitoring the fluids and their migration in the Earth's crust over a large spectrum of spatial and temporal scales. Among them, active seismic methods proved their efficiency in high-resolution time-lapse imaging for reservoir management (Bianchi et al 2004) or to detect, quantify or monitor near-surface water content Pasquet et al 2015), notably using Biot-Gassmann theory (Biot 1962). Although promising, these active seismic techniques require heavy logistics difficult to implement in terms of source and receivers management that only the oil industry can afford particularly when large time and space scales are considered.…”

Section: Introductionmentioning

confidence: 99%

Analysis of ballistic waves in seismic noise monitoring of water table variations in a water field site: added value from numerical modelling to data understanding

Garambois

Guzmán

Brito

et al. 2019

Geophysical Journal International

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SUMMARY Passive seismic interferometry allows to track continuously the weak seismic velocity changes in any medium by correlating the ambient seismic noise between two points to reconstruct the Green’s function. The ballistic surface waves of the reconstructed Green’s functions are used to monitor the changes of water table induced by a controlled experiment in the Crépieux-Charmy (France) exploitation field. Viscoelastic numerical modelling of the monitoring experiment reproduces quite satisfactorily the sensitivity of the surface waves to the water table previously observed with seismic noise data. This numerical approach points out that this sensitivity is controlled by mode mixing of Rayleigh waves. It also made it possible to identify the refracted P wave and to extract its anticorrelated sensitivity to water table variations. Depending on the offset between receivers, it was observed numerically that the interferences between the different waves (with different velocities) composing the seismic wavefield slightly affect the quantitative sensitivity to water table changes. This suggests the use of an optimal spatial and temporal observation window for which wave interference is minor and does not blur the quantitative response to water table variations. We were thus able to determine the relationship between velocity and water table variations for all waves involved. From numerical computations, we identify a weak signal-to-noise ratio phase in the noise correlograms, with a anticorrelated sensitivity to the water table: the reconstructed refracted waves.

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Section: Introductionmentioning

confidence: 99%

Analysis of ballistic waves in seismic noise monitoring of water table variations in a water field site: added value from numerical modelling to data understanding

Garambois

Guzmán

Brito

et al. 2019

Geophysical Journal International

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Onshore monitoring with virtual‐source seismic in horizontal wells: Challenges and solutions

Bakulin

Herhold

López

et al. 2007

SEG Technical Program Expanded Abstracts 2007

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The Virtual Source (VS) Method provides unparalleled capability to synthesize controlled and repeatable downhole sources at the location of VSP geophones. Although the physical sources are located at the surface, VS redatuming corrects for small non-repeatability of surface shooting and compensates for subsurface changes above the receivers. If Virtual Sources are created at permanently placed receivers, then we essentially obtain a "permanent downhole source and receiver" configuration that is optimal for sensitive reservoir monitoring. We demonstrate these advantages with a field data example and then focus on defining acquisition, drilling and tool requirements for onshore VS monitoring.

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Acquisition and Processing Challenges in Continuous Active Reservoir Monitoring

Cited by 2 publications

References 0 publications

Analysis of ballistic waves in seismic noise monitoring of water table variations in a water field site: added value from numerical modelling to data understanding

Analysis of ballistic waves in seismic noise monitoring of water table variations in a water field site: added value from numerical modelling to data understanding

Onshore monitoring with virtual‐source seismic in horizontal wells: Challenges and solutions

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