TY - GEN
T1 - Monitoring of geological carbon sequestration using the coda-wave interferometry method and time-lapse VSP data
AU - Zhou, R.
AU - Huang, L.
AU - Daley, T.
AU - Majer, E.
AU - Denli, H.
AU - Rutledge, J.
PY - 2008
Y1 - 2008
N2 - Injection and movement/saturation of CO2 in a geological formation can cause changes in seismic velocities and attenuation, resulting in changes in seismic-wave scattering and propagation. Accurately estimating seismic-velocity changes from time-lapse seismograms can provide valuable information about where CO2 moves. We investigate the capability of the coda-wave interferornetry method for monitoring geological carbon sequestration using synthetic and field time-lapse VSP data. The coda-wave interferometry method can estimate relative temporal changes in seismic velocities. Synthetic time-lapse VSP data sets were generated using a finite-difference elastic-wave equation scheme for a CO2 injection scenario and a possible leakage scenario. Pre-injection and post-injection field VSP data sets were acquired for monitoring of injected CO2 in a brine aquifer. We estimate the temporal velocity changes at the centers of a moving time window using the coda-wave interferometry method, and then obtain the mean velocity change by averaging the temporal velocity changes over time. The estimated mean velocity changes, from both synthetic and field VSP data, increase significantly for receiver positions approaching the top of a CO2 reservoir. This demonstrates that the coda-wave interferometry method can be used for reliable monitoring of CO2 injection using time-lapse VSP data.
AB - Injection and movement/saturation of CO2 in a geological formation can cause changes in seismic velocities and attenuation, resulting in changes in seismic-wave scattering and propagation. Accurately estimating seismic-velocity changes from time-lapse seismograms can provide valuable information about where CO2 moves. We investigate the capability of the coda-wave interferornetry method for monitoring geological carbon sequestration using synthetic and field time-lapse VSP data. The coda-wave interferometry method can estimate relative temporal changes in seismic velocities. Synthetic time-lapse VSP data sets were generated using a finite-difference elastic-wave equation scheme for a CO2 injection scenario and a possible leakage scenario. Pre-injection and post-injection field VSP data sets were acquired for monitoring of injected CO2 in a brine aquifer. We estimate the temporal velocity changes at the centers of a moving time window using the coda-wave interferometry method, and then obtain the mean velocity change by averaging the temporal velocity changes over time. The estimated mean velocity changes, from both synthetic and field VSP data, increase significantly for receiver positions approaching the top of a CO2 reservoir. This demonstrates that the coda-wave interferometry method can be used for reliable monitoring of CO2 injection using time-lapse VSP data.
UR - https://www.scopus.com/pages/publications/71049134780
U2 - 10.3997/2214-4609.20147805
DO - 10.3997/2214-4609.20147805
M3 - 会议稿件
AN - SCOPUS:71049134780
SN - 9781605604749
T3 - 70th European Association of Geoscientists and Engineers Conference and Exhibition 2008: Leveraging Technology. Incorporating SPE EUROPEC 2008
SP - 2438
EP - 2442
BT - Society of Petroleum Engineers - 70th European Association of Geoscientists and Engineers Conference and Exhibition - Incorporating SPE EUROPEC 2008
PB - Society of Petroleum Engineers
T2 - 70th European Association of Geoscientists and Engineers Conference and Exhibition - Incorporating SPE EUROPEC 2008
Y2 - 9 June 2008 through 12 June 2008
ER -