Modeling of geomechanical proceses during injection in amultilayered reservoir-caprock system and implications on sitecharacterization

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In this paper we present results of a numerical simulationof the potential for fault reactivation and hydraulic fracturingassociated with CO2 injection in a multilayered reservoir-caprock system,and discuss its implications on site characterization. The numericalsimulation is performed using the coupled processes simulator TOUGH-FLAC(Rutqvist et al. 2002, Rutqvist and Tsang, 2003), and is an extension ofearlier numerical studies of a single caprock system (Rutqvist and Tsang,2002). In this study, CO2 is injected for 30 years in a 200 meter thickpermeable saline water formation located at 1600 meters depth (Figure 1).The injection formation is overlaid by several layers of caprocks, whichare intersected by ... continued below

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Rutqvist, Jonny; Birkholzer, Jens & Tsang, Chin-Fu March 1, 2006.

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In this paper we present results of a numerical simulationof the potential for fault reactivation and hydraulic fracturingassociated with CO2 injection in a multilayered reservoir-caprock system,and discuss its implications on site characterization. The numericalsimulation is performed using the coupled processes simulator TOUGH-FLAC(Rutqvist et al. 2002, Rutqvist and Tsang, 2003), and is an extension ofearlier numerical studies of a single caprock system (Rutqvist and Tsang,2002). In this study, CO2 is injected for 30 years in a 200 meter thickpermeable saline water formation located at 1600 meters depth (Figure 1).The injection formation is overlaid by several layers of caprocks, whichare intersected by a permeable fault zone allowing upward migration ofthe CO2 within the multilayered system (see Table 1 for materialproperties). The potential for fault slip or fracturing are calculated,based on the time-dependent evolution and local distribution of fluidpressure and the three-dimensional stress field, including importantporo-elastic stresses.The numerical results are discussed with respect tothe site-characterization strategy that would be recommended forevaluation of maximum sustainable injection pressure at an industrial CO2injection site.

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  • CO2SC Symposium 2006, Berkeley, CA, 20-22 March2006

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  • Report No.: LBNL--61032
  • Grant Number: DE-AC02-05CH11231
  • Grant Number: EPA:G4W009
  • Office of Scientific & Technical Information Report Number: 908498
  • Archival Resource Key: ark:/67531/metadc878035

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  • March 1, 2006

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  • Sept. 22, 2016, 2:13 a.m.

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  • Oct. 3, 2017, 2:01 p.m.

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Rutqvist, Jonny; Birkholzer, Jens & Tsang, Chin-Fu. Modeling of geomechanical proceses during injection in amultilayered reservoir-caprock system and implications on sitecharacterization, article, March 1, 2006; Berkeley, California. (digital.library.unt.edu/ark:/67531/metadc878035/: accessed November 22, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.