Improving Time-lapse Seismic Repeatability CO2CRC Otway Site Permanent Geophone Array Field Trials
The next stage of CO2CRC Otway project involves injection of a small amount (around 15,000 tonnes) of CO2/CH4 gas mixture into saline aquifer (Paaratte formation) at a depth of ~1.5 km. The seismic time-lapse signal will depend largely on the formation properties and the injection scenario, but is l...
| Main Authors: | , , , , |
|---|---|
| Other Authors: | |
| Format: | Conference Paper |
| Published: |
EAGE
2013
|
| Online Access: | http://hdl.handle.net/20.500.11937/34786 |
| _version_ | 1848754317970898944 |
|---|---|
| author | Shulakova, V. Pevzner, Roman Dupuis, C. Urosevic, Milovan Lumley, D. |
| author2 | EAGE |
| author_facet | EAGE Shulakova, V. Pevzner, Roman Dupuis, C. Urosevic, Milovan Lumley, D. |
| author_sort | Shulakova, V. |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | The next stage of CO2CRC Otway project involves injection of a small amount (around 15,000 tonnes) of CO2/CH4 gas mixture into saline aquifer (Paaratte formation) at a depth of ~1.5 km. The seismic time-lapse signal will depend largely on the formation properties and the injection scenario, but is likely to be relatively weak. In order to improve time-lapse seismic monitoring capabilities by decreasing the noise level, a buried receiver arrays can be used. A small-scale trial of such array was conducted at Otway site in June 2012. A set of 25 geophones was installed in 3 m deep boreholes in parallel to the same number of surface geophones. In addition, four geophones were placed into boreholes of 1 to 12 m depth. In order to assess the gain in signal-to-noise ratio and repeatability, both active and passive seismic surveys were carried out. The surveys were conducted in relatively poor weather conditions, with rain, strong wind and thunderstorms increasing the noise level. We found that noise level for buried geophones is on average 20 dB lower compared to the surface ones. Furthermore, the combination of active and passive experiments has allowed us to perform a detailed classification of various noise sources. |
| first_indexed | 2025-11-14T08:38:30Z |
| format | Conference Paper |
| id | curtin-20.500.11937-34786 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| last_indexed | 2025-11-14T08:38:30Z |
| publishDate | 2013 |
| publisher | EAGE |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-347862018-08-13T03:43:36Z Improving Time-lapse Seismic Repeatability CO2CRC Otway Site Permanent Geophone Array Field Trials Shulakova, V. Pevzner, Roman Dupuis, C. Urosevic, Milovan Lumley, D. EAGE The next stage of CO2CRC Otway project involves injection of a small amount (around 15,000 tonnes) of CO2/CH4 gas mixture into saline aquifer (Paaratte formation) at a depth of ~1.5 km. The seismic time-lapse signal will depend largely on the formation properties and the injection scenario, but is likely to be relatively weak. In order to improve time-lapse seismic monitoring capabilities by decreasing the noise level, a buried receiver arrays can be used. A small-scale trial of such array was conducted at Otway site in June 2012. A set of 25 geophones was installed in 3 m deep boreholes in parallel to the same number of surface geophones. In addition, four geophones were placed into boreholes of 1 to 12 m depth. In order to assess the gain in signal-to-noise ratio and repeatability, both active and passive seismic surveys were carried out. The surveys were conducted in relatively poor weather conditions, with rain, strong wind and thunderstorms increasing the noise level. We found that noise level for buried geophones is on average 20 dB lower compared to the surface ones. Furthermore, the combination of active and passive experiments has allowed us to perform a detailed classification of various noise sources. 2013 Conference Paper http://hdl.handle.net/20.500.11937/34786 10.3997/2214-4609.20130429 EAGE restricted |
| spellingShingle | Shulakova, V. Pevzner, Roman Dupuis, C. Urosevic, Milovan Lumley, D. Improving Time-lapse Seismic Repeatability CO2CRC Otway Site Permanent Geophone Array Field Trials |
| title | Improving Time-lapse Seismic Repeatability CO2CRC Otway Site Permanent Geophone Array Field Trials |
| title_full | Improving Time-lapse Seismic Repeatability CO2CRC Otway Site Permanent Geophone Array Field Trials |
| title_fullStr | Improving Time-lapse Seismic Repeatability CO2CRC Otway Site Permanent Geophone Array Field Trials |
| title_full_unstemmed | Improving Time-lapse Seismic Repeatability CO2CRC Otway Site Permanent Geophone Array Field Trials |
| title_short | Improving Time-lapse Seismic Repeatability CO2CRC Otway Site Permanent Geophone Array Field Trials |
| title_sort | improving time-lapse seismic repeatability co2crc otway site permanent geophone array field trials |
| url | http://hdl.handle.net/20.500.11937/34786 |