dc.contributor.author | Yang, Di | |
dc.contributor.author | Fehler, Michael | |
dc.contributor.author | Malcolm, Alison E. | |
dc.contributor.author | Huang, Lianjie | |
dc.contributor.other | Massachusetts Institute of Technology. Earth Resources Laboratory | |
dc.date.accessioned | 2014-09-30T12:35:18Z | |
dc.date.available | 2014-09-30T12:35:18Z | |
dc.date.issued | 2011 | |
dc.identifier.uri | http://hdl.handle.net/1721.1/90455 | |
dc.description.abstract | Geological carbon sequestration involves large-scale injection of carbon dioxide into underground geologic formations and is considered as a potential approach for mitigating global warming. Changes in reservoir properties resulting from the CO[subscript 2] injection and migration can be characterized using waveform inversions of time-lapse seismic data. The conventional approach for analysis using waveform tomography is to take the difference of the images obtained using baseline and subsequent time-lapse datasets that are inverted independently. By contrast, double-difference waveform inversion uses timelapse seismic datasets to jointly invert for reservoir changes. We apply conventional and double difference methods to a field time-lapse walkaway VSP data set acquired in 2008 and 2009 for monitoring CO[subscript 2] injection at an enhanced oil recovery field at SACROC, Texas. The double-difference waveform inversion gives a cleaner and more easily interpreted image of reservoir changes, as compared to that obtained with the conventional scheme. Our results from the application of acoustic double-difference waveform tomography shows some zones with decreased P-wave velocity within the reservoir due to CO[subscript 2] injection and migration. | en_US |
dc.description.sponsorship | United States. Dept. of Energy (National Energy Technology Laboratory (U.S.) Contract DE-AC52-06NA25396); MIT Energy Initiative Seed Fund | en_US |
dc.language.iso | en_US | en_US |
dc.publisher | Massachusetts Institute of Technology. Earth Resources Laboratory | en_US |
dc.relation.ispartofseries | Earth Resources Laboratory Industry Consortia Annual Report;2011-07 | |
dc.subject | CO2 | |
dc.subject | VSP | |
dc.subject | Inversion | |
dc.subject | Tomography | |
dc.title | Carbon sequestration monitoring with acoustic double-difference waveform inversion: A case study on SACROC walkaway VSP data | en_US |
dc.type | Technical Report | en_US |