Continuous active-source seismic monitoring of CO2 injection in abrine aquifer

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Continuous crosswell seismic monitoring of a small-scale CO2injection was accomplished with the development of a noveltubing-deployed piezoelectric borehole source. This piezotube source wasdeployed on the CO2 injection tubing, near the top of the saline aquiferreservoir at 1657-m depth, and allowed acquisition of crosswellrecordings at 15-minute intervals during the multiday injection. Thechange in traveltime recorded at various depths in a nearby observationwell allowed hour-by-hour monitoring of the growing CO2 plume via theinduced seismic velocity change. Traveltime changes of 0.2 to 1.0 ms ( upto 8 percent ) were observed, with no change seen at control sensorsplaced above the reservoir. The traveltime ... continued below

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Daley, Thomas M.; Solbau, Ray D.; Ajo-Franklin, Jonathan B. & Benson, Sally M. December 10, 2006.

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Continuous crosswell seismic monitoring of a small-scale CO2injection was accomplished with the development of a noveltubing-deployed piezoelectric borehole source. This piezotube source wasdeployed on the CO2 injection tubing, near the top of the saline aquiferreservoir at 1657-m depth, and allowed acquisition of crosswellrecordings at 15-minute intervals during the multiday injection. Thechange in traveltime recorded at various depths in a nearby observationwell allowed hour-by-hour monitoring of the growing CO2 plume via theinduced seismic velocity change. Traveltime changes of 0.2 to 1.0 ms ( upto 8 percent ) were observed, with no change seen at control sensorsplaced above the reservoir. The traveltime measurements indicate that theCO2 plume reached the top of the reservoir sand before reaching theobservation well, where regular fluid sampling was occuring during theinjection, thus providing information about the in situ buoyancy ofCO2.

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  • Journal Name: Geophysics; Journal Volume: 72; Journal Issue: 5; Related Information: Journal Publication Date: September-October2007

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  • Report No.: LBNL--63325
  • Grant Number: DE-AC02-05CH11231
  • Office of Scientific & Technical Information Report Number: 927392
  • Archival Resource Key: ark:/67531/metadc894534

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  • December 10, 2006

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  • Sept. 27, 2016, 1:39 a.m.

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  • Sept. 29, 2016, 2:07 p.m.

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Daley, Thomas M.; Solbau, Ray D.; Ajo-Franklin, Jonathan B. & Benson, Sally M. Continuous active-source seismic monitoring of CO2 injection in abrine aquifer, article, December 10, 2006; Berkeley, California. (digital.library.unt.edu/ark:/67531/metadc894534/: accessed August 16, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.