TY - GEN
T1 - Integrating active with passive seismic data to best constrain CO2 injection monitoring
AU - Goertz-Allmann, B. P.
AU - Jordan, M.
AU - Bauer, R.
AU - Oye, V.
AU - Greenberg, S. E.
N1 - Funding Information:
We are grateful for support through the Climit program of GASSNOVA project No. 616065. Data provided by the Midwest Geological Sequestration Consortium (MGSC). MGSC is funded by the U.S. Department of Energy through the National Energy Technology Laboratory (NETL) via the Regional Carbon Sequestration Partnership Program (contract number DE-FC26-05NT42588) and by a cost share agreement with the Illinois Department of Commerce and Economic Opportunity, Office of Coal Development through the Illinois Clean Coal Institute.
PY - 2017
Y1 - 2017
N2 - The Illinois Basin-Decatur Project (IBDP) is to date one of the largest CO2 sequestration projects in the United States. So far, 1 Mio tonnes of CO2 have been injected over 3 years into the Mt. Simon sandstone formation at about 2 km depth. A suite of various active and passive seismic monitoring techniques have been applied at the site, providing a rich monitoring dataset. Time-lapse 3D surface seismic and VSP measurements were carried out to delineate the progression of the CO2 front. In addition, passive seismic monitoring revealed over 10'000 microseismic events. As a novel method, we attempt to combine the active and passive seismic data for seismic tomographic inversion for the 4D velocity-and attenuation structure in the reservoir. The combined aperture and higher resolution focuses on the reservoir and may allow a more precise mapping of the injected fluid over time. To investigate 4D changes of velocities and attenuation a similar source and receiver distribution is required. This is a particular challenge for microseismic events. High microseismic event location accuracy is essential, which we intend to improve by near surface material characterization, both from downhole petrophysical logging and seismic velocity logging within newly drilled shallow wells.
AB - The Illinois Basin-Decatur Project (IBDP) is to date one of the largest CO2 sequestration projects in the United States. So far, 1 Mio tonnes of CO2 have been injected over 3 years into the Mt. Simon sandstone formation at about 2 km depth. A suite of various active and passive seismic monitoring techniques have been applied at the site, providing a rich monitoring dataset. Time-lapse 3D surface seismic and VSP measurements were carried out to delineate the progression of the CO2 front. In addition, passive seismic monitoring revealed over 10'000 microseismic events. As a novel method, we attempt to combine the active and passive seismic data for seismic tomographic inversion for the 4D velocity-and attenuation structure in the reservoir. The combined aperture and higher resolution focuses on the reservoir and may allow a more precise mapping of the injected fluid over time. To investigate 4D changes of velocities and attenuation a similar source and receiver distribution is required. This is a particular challenge for microseismic events. High microseismic event location accuracy is essential, which we intend to improve by near surface material characterization, both from downhole petrophysical logging and seismic velocity logging within newly drilled shallow wells.
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U2 - 10.3997/2214-4609.201701963
DO - 10.3997/2214-4609.201701963
M3 - Conference contribution
AN - SCOPUS:85039867752
T3 - EAGE/SEG Research Workshop 2017 on Geophysical Monitoring of CO2 Injections: CCS and CO2-EOR
SP - 167
EP - 171
BT - EAGE/SEG Research Workshop 2017 on Geophysical Monitoring of CO2 Injections
PB - European Association of Geoscientists and Engineers, EAGE
T2 - EAGE/SEG Research Workshop 2017 on Geophysical Monitoring of CO2 Injections: CCS and CO2-EOR
Y2 - 28 August 2017 through 31 August 2017
ER -