Applicability of Zero-offset and Offset VSP for Time-lapse monitoring – CO2CRC Otway Project Case Study

Pevzner, Roman; Urošević, Milovan; Nakanishi, Shigetaka

doi:10.3997/2214-4609.201401178

Cited by 9 publications

(4 citation statements)

References 4 publications

(5 reference statements)

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“…The polarisation of the fast shear wave has azimuth S1 = 159 • . Similar change in the orientation of the fast shear wave polarisation was also observed in zero-offset VSP data, which was presented by Pevzner et al (2010), however, the unoriented VSP data has large error bars compared to such small changes.…”

Section: Resultssupporting

confidence: 81%

Time-lapse Seismic Anisotropy Analysis for CO2 Geosequestration Using 3D 3C VSP Data

Shaiban¹,

Bóna²,

Pevzner³

et al. 2011

73rd EAGE Conference and Exhibition Incorporating SPE EUROPEC 2011

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We present a quantitative analysis of the change of the seismic anisotropy observed after CO2 injection within the CO2CRC Otway Basin Project. We invert two 3C 3D VSP datasets for the density scaled stiffness tensors and compute the difference of the resulting compliance tensors. The results are in good agreement with the observed changes in the time-lapse zero-offset VSP experiments and with the available sonic log data.

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Section: Resultssupporting

confidence: 81%

Time-lapse Seismic Anisotropy Analysis for CO2 Geosequestration Using 3D 3C VSP Data

Shaiban¹,

Bóna²,

Pevzner³

et al. 2011

73rd EAGE Conference and Exhibition Incorporating SPE EUROPEC 2011

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“…The seismic monitoring program was focused on the borehole approach as it is well recognised for the time-lapse observations of a reservoir providing great repeatability (Pevzner et al, 2010;Tertyshnikov et al, 2017;Tertyshnikov et al, 2018). It allows for comparatively fast acquisitions for the repeated surveys and has limited land access issues.…”

Section: Borehole Seismicmentioning

confidence: 99%

A controlled CO2 release experiment in a fault zone at the In-Situ Laboratory in Western Australia

Michael

Avijegon²,

Ricard

et al. 2020

International Journal of Greenhouse Gas Control

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A controlled-release test at the In-Situ Laboratory Project in Western Australia injected 38 tonnes of gaseous CO2 between 336-342 m depth in a fault zone, and the gas was monitored by a wide range of downhole and surface monitoring technologies. Injection of CO2 at this depth fills the gap between shallow release (<25 m) and storage (>600 m) field trials. The main objectives of the controlled-release test were to assess the monitorability of shallow CO2 accumulations, and to investigate the impacts of a fault zone on CO2 migration. CO2 arrival was detected by distributed temperature sensing at the monitoring well (7 m away) after approximately 1.5 days and an injection volume of 5 tonnes. The CO2 plume was detected also by borehole seismic and electric resistivity imaging. The detection of significantly less than 38 tonnes of CO2 in the shallow subsurface demonstrates rapid and sensitive monitorability of potential leaks in the overburden of a commercial-scale storage project, prior to reaching shallow groundwater, soil zones or the atmosphere.Observations suggest that the fault zone did not alter the CO2 migration along bedding at the scale and depth of the test. Contrary to model predictions, no vertical CO2 migration was detected beyond the perforated injection interval. CO2 and formation water escaped to the surface through the monitoring well at the end of the experiment due to unexpected damage to the well's fibreglass casing. The well was successfully remediated without impact to the environment and the site is ready for future experiments.

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“…Successful implementation of time‐lapse seismic technology has been applied to several carbon capture and storage (CCS) projects such as the Ketzin CO 2 storage site, 10–12 Weyburn CCS Project, 13,14 Sleipner Project, 15–17 and Otway CCS Project 18–20 . Each CCS project is characterized by unique fluid systems, but they can be grouped into general categories.…”

Section: Introductionmentioning

confidence: 99%

Quantitative interpretation of time‐lapse seismic data at Farnsworth field unit: Rock physics modeling, and calibration of simulated time‐lapse velocity responses

et al. 2022

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This study investigates the contribution of fluid saturation variation to the time-lapse velocity response by performing fluid substitution modeling. The methodology is exemplified by the time-lapse seismic monitoring of carbon dioxide at Farnsworth field unit (FWU). In order to evaluate the fluid distribution in a matured oil reservoir, the Southwest Regional Partnership (SWP) acquired multiple vertical seismic profile (VSP) surveys at different times during the CO 2 -water alternatinggas (WAG) injection period. In this work, we present a thorough methodology for computing the elastic response of the saturated rock for different fluid saturations using a site-specific petro-elastic model (PEM). The output from the PEM was combined with results from a fluid compositional model to compute the seismic velocities at times corresponding to each VSP survey. To produce a calibrated simulated response, the measured time-lapse seismic velocities were integrated into the numerical simulation model. The mismatches between the predicted and measured time-lapse velocities were minimized through an iterative calibration process using a trained artificial neural network proxy (ANN) coupled with a particle swarm optimizer (PSO). Our study indicates that the hybrid optimization workflow can effectively perform the history matching. With an accurate prediction of the hydrodynamic properties, the migration of CO 2 within the subsurface was modeled by predicting the spatial velocity distribution for a radius of 305 m around the injection well. The technology demonstrated and the expertise gained from this study can guide similar CO 2 -WAG projects.

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Applicability of Zero-offset and Offset VSP for Time-lapse monitoring – CO2CRC Otway Project Case Study

Cited by 9 publications

References 4 publications

Time-lapse Seismic Anisotropy Analysis for CO2 Geosequestration Using 3D 3C VSP Data

Time-lapse Seismic Anisotropy Analysis for CO2 Geosequestration Using 3D 3C VSP Data

A controlled CO2 release experiment in a fault zone at the In-Situ Laboratory in Western Australia

Quantitative interpretation of time‐lapse seismic data at Farnsworth field unit: Rock physics modeling, and calibration of simulated time‐lapse velocity responses

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