Underground gas storage: estimating gas column height and saturation with time lapse seismic

Dumont, Marie-Hélène; Fayemendy, C.; Mari, Jean-Luc; Huguet, F.

doi:10.1144/petgeo.7.2.155

Cited by 6 publications

(4 citation statements)

References 5 publications

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“…In these studies, consideration has been given to both seismic amplitudes (Huang et al . 2001) and reflector time‐shifts (Dumont et al 2001) as possible attributes for monitoring purposes but it is found that the results from amplitude and time‐shift analyses differ substantially. These differences are indicative of the degree of calibration of the seismic product and the complexity of the reservoir geology but are central to understanding the quantitative nature of the 4D seismic signal.…”

Section: Introductionmentioning

confidence: 99%

Towards quantitative evaluation of gas injection using time-lapse seismic data

Falahat

Shams

MacBeth

2010

Geophysical Prospecting

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A B S T R A C TOf particular concern in the monitoring of gas injection for the purposes of storage, disposal or improved oil recovery is the exact spatial distribution of the gas volumes in the subsurface. In principle this requirement is addressed by the use of 4D seismic data, although it is recognized that the seismic response still largely provides a qualitative estimate of moved subsurface fluids. Exact quantitative evaluation of fluid distributions and associated saturations remains a challenge to be solved. Here, an attempt has been made to produce mapped quantitative estimates of the gas volume injected into a clastic reservoir. Despite good results using three accurately repeated seismic surveys, time-delay and amplitude attributes reveal fine-scale differences though large-scale agreement in the estimated fluid movement. These differences indicate disparities in the nature of the two attributes themselves, which can be explained by several possible causes. Of most impact are the effects of processing and migration, wave interference effects and noise from non-repeatability of the seismic surveys. This subject highlights the need for a more careful consideration in 4D acquisition, amplitude processing and use of true amplitude preserving attributes in quantitative interpretation.

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Section: Introductionmentioning

confidence: 99%

Towards quantitative evaluation of gas injection using time-lapse seismic data

Falahat

Shams

MacBeth

2010

Geophysical Prospecting

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“…Two lines of walk away VSP have been recorded (Mari et al, 2000;Dumont et al, 2001). Line VSP-M01, orientated north-south, consists of 103 vibrating points with a maximum offset to the source of 800 m. Line VSP-M02, orientated east-west, consists of 60 vibrator points and the maximum offset to the source is 500 m. The vibrators performed sweeps in the 16-120 Hz frequency interval.…”

Section: Permanent Downhole Geophonesmentioning

confidence: 99%

“…estimate the porosities and the gas saturation along the walk away profiles (Mari et al, 2000;Dumont et al, 2001).…”

Section: Permanent Downhole Geophonesmentioning

confidence: 99%

Natural Gas Storage Seismic Monitoring

Mari

Huguet

Meunier

et al. 2011

Oil Gas Sci. Technol. – Rev. IFP Energies nouvelles

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Résumé -Suivi sismique des stockages de gaz naturel -IFP Energies nouvelles, la CGGVeritas et GDF Suez ont mené ensemble, depuis 1980, de nombreuses expériences de monitoring sismique afin de détecter et de suivre les mouvements du gaz dans des stockages géologiques de gaz naturel. Des acquisitions ont été réalisées à différents stades de la vie du stockage tant en sismique de surface qu'en sismique de puits. Des antennes de récepteurs permanentes ont été construites et implantées dans des puits. Des sources permanentes ont été conçues et utilisées de façon continue pendant plusieurs années pour suivre le cycle remplissage/extraction du stockage. Les dispositifs permanents ont permis d'améliorer la précision des mesures de temps d'arrivée jusqu'au dixième de milliseconde. L'arrivée de gaz dans un aquifère se traduit par une rapide variation de vitesse, qui a un impact à la fois sur les temps d'arrivée des réflexions sous les réservoirs et sur les amplitudes aux limites du réservoir. Les mouvements ultérieurs du contact gaz/eau avec le cycle de remplissage/soutirage sont plus difficiles à suivre et nécessitent une excellente précision des mesures de temps d'arrivée des réflexions. L'inversion de ces mesures pour l'estimation des saturations en gaz et en eau est délicate. Cette inversion a été tentée, avec un certain succès, dans le cas de Céré-la-Ronde. Du fait de la densité du dioxyde de carbone, au-delà d'une profondeur de 800 mètres environ, cette inversion risque d'être encore plus délicate pour les stockages de CO 2 que pour les stockages de gaz naturel. Abstract -Natural Gas Storage Seismic Monitoring -IFP Energies nouvelles, CGGVeritas and GDF Suez have conducted together, since 1980, a series of seismic monitoring experiments in order to detect and follow the movements of the gas plume in natural gas

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“…(1998) use time‐lapse seismics to monitor a CO 2 flood for reservoir flow anisotropy and permeability structure. With time, more extensive surveys of large‐scale production systems were essayed with repeat surface seismic surveys, highlighting the importance of the time‐lapse images, but also the need for repeatable sources and stable sensors in acquiring useful time‐lapse images (Christie & Ebrom 2000; Dumont et al . 2001).…”

Section: Introductionmentioning

confidence: 99%

Numerical simulation of first-order backscattered P and S waves for time-lapse seismic imaging in heterogeneous reservoirs

Leary

2002

Geophysical Journal International

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Summary First‐order elastic wave scattering theory, validated in general features by deep‐borehole seismic coda wave observations, is used to numerically simulate time‐lapse borehole seismic data aimed at monitoring oil–water substitution in heterogeneous hydrocarbon reservoirs. A first‐order perturbation solution of the vector wave equation leads to P–P and S–S backscattered displacement vector motion expressed as the angular summation of the second radial derivative of P‐ and S‐wave velocity and density fluctuations α′/α, β′/β, ρ′/ρ over expanding spherical wave fronts of radii ξ = αt/2 and ξ = βt/2. P‐ and S‐wave velocity and density spatial heterogeneity is modelled as long‐range correlated random fluctuations consistent with the power‐law‐scaling character of crustal rock physical properties measured by borehole logs. The spectra of model scattering displacement seismograms for a power‐law‐scaling volumetric noise distribution duplicate the frequency enrichment observed in the spectra of broadband earthquake coda waves recorded in a deep well. Modelling of time‐lapse scattering in power‐law‐scaling permeability structures suggests that a stable borehole seismic source can locate oil–water substitution in reservoir volumes tens of metres on a side at distances of up to a few hundred metres from an observation well using currently available borehole seismic technology. Time‐lapse tracking of oil–water substitution and the monitoring of reservoir stress conditions can lead to spatially well‐constrained reservoir models, despite large‐scale, large‐amplitude correlated random heterogeneity.

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Underground gas storage: estimating gas column height and saturation with time lapse seismic

Cited by 6 publications

References 5 publications

Towards quantitative evaluation of gas injection using time-lapse seismic data

Towards quantitative evaluation of gas injection using time-lapse seismic data

Natural Gas Storage Seismic Monitoring

Numerical simulation of first-order backscattered P and S waves for time-lapse seismic imaging in heterogeneous reservoirs

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