TY - GEN

T1 - The potential of borehole seismic monitoring techniques at the field scale for leakage and well integrity assessment in CO2 injection projects

AU - Barbosa, Nicolás D.

AU - Greenwood, Andrew

AU - Caspari, Eva

AU - Jordan, Michael

AU - Duda, Marcin Ireneusz

AU - Dupuy, Bastien

AU - Ghaderi, Amir

AU - Eliasson, Peder

PY - 2024/8/26

Y1 - 2024/8/26

N2 - In this study, we explore the use of different wavefields recorded in VSP surveys to conduct time-lapse seismic monitoring of CO2 migration in the subsurface. To do so, we perform a series of VSP experiments employing a surface source and an array of borehole hydrophones to establish correlations between the recorded wavefields (e.g., direct, reflected, and guided waves) and the presence of heterogeneities in the formation surrounding the borehole, which may be affected by the presence of CO2. We then analyze the changes in those seismic signals by comparing data recorded before and during a CO2 injection experiment carried out at the Svelvik CO2 Field Laboratory. We focus on VSP attributes typically employed for seismic characterization (e.g., arrival time shifts and amplitude decay of direct waves) as well as on wave types which are not commonly used (e.g., tube waves) but may provide additional information regarding the presence of CO2 in the vicinity of the borehole.

AB - In this study, we explore the use of different wavefields recorded in VSP surveys to conduct time-lapse seismic monitoring of CO2 migration in the subsurface. To do so, we perform a series of VSP experiments employing a surface source and an array of borehole hydrophones to establish correlations between the recorded wavefields (e.g., direct, reflected, and guided waves) and the presence of heterogeneities in the formation surrounding the borehole, which may be affected by the presence of CO2. We then analyze the changes in those seismic signals by comparing data recorded before and during a CO2 injection experiment carried out at the Svelvik CO2 Field Laboratory. We focus on VSP attributes typically employed for seismic characterization (e.g., arrival time shifts and amplitude decay of direct waves) as well as on wave types which are not commonly used (e.g., tube waves) but may provide additional information regarding the presence of CO2 in the vicinity of the borehole.

KW - geologist

KW - reservoir characterization

KW - injection well

KW - subsurface storage

KW - injection

KW - co 2

KW - borehole

KW - exploration geophysicist

KW - applied geoscience & energy 10,

KW - borehole seismic monitoring technique

U2 - 10.1190/image2024-4099280.1

DO - 10.1190/image2024-4099280.1

M3 - Conference contribution

SN - 1052-3812

BT - Fourth International Meeting for Applied Geoscience & Energy

T2 - Fourth International Meeting for Applied Geoscience & Energy

Y2 - 26 August 2024 through 29 August 2024

ER -